Banco Santander (SAN) 20-F 26 Mar 19 2018 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2018shares
Document and Entity Information [Abstract]
Entity Registrant Name	Banco Santander, S.A.
Entity Central Index Key	0000891478
Document Type	20-F
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding	16,236,573,942
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Shell Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
CASH, CASH BALANCES AT CENTRAL BANKS AND OTHER DEPOSITS ON DEMAND	€ 113,663	€ 110,995	€ 76,454
FINANCIAL ASSETS HELD FOR TRADING	92,879	125,458	148,187
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	10,730
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	57,460	34,782	31,609
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	121,091
FINANCIAL ASSETS AVAILABLE-FOR-SALE:		133,271	116,774
FINANCIAL ASSETS AT AMORTIZED COST	946,099
LOANS AND RECEIVABLES		903,013	840,004
INVESTMENTS HELD-TO-MATURITY		13,491	14,468
HEDGING DERIVATIVES, ASSETS	8,607	8,537	10,377
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, ASSETS	1,088	1,287	1,481
INVESTMENTS	7,588	6,184	4,836
Joint ventures entities	979	1,987	1,594
Associated companies	6,609	4,197	3,242
ASSETS UNDER INSURANCE OR REINSURANCE CONTRACTS	324	341	331
TANGIBLE ASSETS	26,157	22,974	23,286
Property, plant and equipment:	24,594	20,650	20,770
Investment property:	1,563	2,324	2,516
INTANGIBLE ASSETS	28,560	28,683	29,421
Goodwill	25,466	25,769	26,724
Other intangible assets	3,094	2,914	2,697
TAX ASSETS	30,251	30,243	27,678
Current tax assets	6,993	7,033	6,414
Deferred tax assets	23,258	23,210	21,264
OTHER ASSETS	9,348	9,766	8,447
Insurance contracts linked to pensions	210	239	269
Inventories	147	1,964	1,116
Other	8,991	7,563	7,062
NON-CURRENT ASSETS HELD FOR SALE	5,426	15,280	5,772
TOTAL ASSETS	1,459,271	1,444,305	1,339,125
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING	70,343	107,624	108,765
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	68,058	59,616	40,263
FINANCIAL LIABILITIES AT AMORTIZED COST	1,171,630	1,126,069	1,044,240
HEDGING DERIVATIVES, LIABILITIES	6,363	8,044	8,156
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, LIABILITIES	303	330	448
LIABILITIES UNDER INSURANCE OR REINSURANCE CONTRACTS	765	1,117	652
PROVISIONS	13,225	14,489	14,459
TAX LIABILITIES	8,135	7,592	8,373
Current tax liabilities	2,567	2,755	2,679
Deferred tax liabilities	5,568	4,837	5,694
OTHER LIABILITIES	13,088	12,591	11,070
TOTAL LIABILITIES	1,351,910	1,337,472	1,236,426
SHAREHOLDERS' EQUITY	118,613	116,265	105,977
CAPITAL	8,118	8,068	7,291
SHARE PREMIUM	50,993	51,053	44,912
EQUITY INSTRUMENTS ISSUED OTHER THAN CAPITAL	565	525
OTHER EQUITY	234	216	240
ACCUMULATED RETAINED EARNINGS	56,756	53,437	49,953
OTHER RESERVES	(3,567)	(1,602)	(949)
Reserves or accumulated losses in joint ventures investments	917	724	466
Other reserve components	(4,484)	(2,326)	(1,415)
(-) OWN SHARES	(59)	(22)	(7)
PROFIT ATTRIBUTABLE TO SHAREHOLDERS OF THE PARENT	7,810	6,619	6,204
(-) INTERIM DIVIDENDS	(2,237)	(2,029)	(1,667)
OTHER ACCUMULATED COMPREHENSIVE INCOME	(22,141)	(21,776)	(15,039)
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	(2,936)	(4,034)	(3,933)
Actuarial gains or losses on defined benefit pension plans	(3,609)	(4,033)	(3,931)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	1	(1)	(2)
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	(19,205)	(17,742)	(11,106)
Hedge of net investments in foreign operations (effective portion)	(4,312)	(4,311)	(4,925)
Exchange differences	(15,730)	(15,430)	(8,070)
Hedging derivatives. Cash flow hedges (effective portion)	277	152	469
Reserve of gains and losses on financial assets measured at fair value through other comprehensive income	828
Financial assets available-for-sale		2,068	1,571
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, may be reclassified	(268)	(221)	(151)
NON-CONTROLLING INTEREST	10,889	12,344	11,761
Other comprehensive income	(1,292)	(1,436)	(853)
Other items	12,181	13,780	12,614
TOTAL EQUITY	107,361	106,833	102,699
TOTAL LIABILITIES AND EQUITY	1,459,271	1,444,305	1,339,125
Provision for pensions and other employment defined benefit obligations
LIABILITIES AND EQUITY
PROVISIONS	5,558	6,345	6,576
Provision for other long term employee benefits
LIABILITIES AND EQUITY
PROVISIONS	1,239	1,686	1,712
Provision for taxes and other legal contingencies
LIABILITIES AND EQUITY
PROVISIONS	3,174	3,181	2,994
Provision for contingent liabilities and commitments
LIABILITIES AND EQUITY
PROVISIONS	779	617	459
Other provisions member
LIABILITIES AND EQUITY
PROVISIONS	2,475	2,660	2,718
For own use
ASSETS
Property, plant and equipment:	8,150	8,279	7,860
Leased out under an operating lease
ASSETS
Property, plant and equipment:	16,444	12,371	12,910
Investment property:	1,195	1,332	1,567
Derivatives
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING	55,341	57,892	74,369
Short positions
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING	15,002	20,979	23,005
Deposits
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING		28,753	11,391
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	65,304	55,971	37,472
FINANCIAL LIABILITIES AT AMORTIZED COST	903,101	883,320	791,646
Deposits - Central banks
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING		282	1,351
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	14,816	8,860	9,112
FINANCIAL LIABILITIES AT AMORTIZED COST	72,523	71,414	44,112
Deposits - Credit institutions
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING		292	44
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	10,891	18,166	5,015
FINANCIAL LIABILITIES AT AMORTIZED COST	89,679	91,300	89,764
Deposits - Customers
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING		28,179	9,996
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	39,597	28,945	23,345
FINANCIAL LIABILITIES AT AMORTIZED COST	740,899	720,606	657,770
Marketable debt securities
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	2,305	3,056	2,791
FINANCIAL LIABILITIES AT AMORTIZED COST	244,314	214,910	226,078
Other financial liabilities
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	449	589
FINANCIAL LIABILITIES AT AMORTIZED COST	24,215	27,839	26,516
Derivatives
ASSETS
FINANCIAL ASSETS HELD FOR TRADING	55,939	57,243	72,043
Equity instruments
ASSETS
FINANCIAL ASSETS HELD FOR TRADING	8,938	21,353	14,497
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	3,260
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:		933	546
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	2,671
FINANCIAL ASSETS AVAILABLE-FOR-SALE:		4,790	5,487
LIABILITIES AND EQUITY
Financial assets available-for-sale		914	1,148
Debt instruments
ASSETS
FINANCIAL ASSETS HELD FOR TRADING	27,800	36,351	48,922
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	5,587
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	3,222	3,485	3,398
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	116,819
FINANCIAL ASSETS AVAILABLE-FOR-SALE:	118,420	128,481	111,287
FINANCIAL ASSETS AT AMORTIZED COST	37,696
LOANS AND RECEIVABLES		17,543	13,237
INVESTMENTS HELD-TO-MATURITY		13,491	14,468
LIABILITIES AND EQUITY
Financial assets available-for-sale	831	1,154	423
Loans and advances
ASSETS
FINANCIAL ASSETS HELD FOR TRADING	202	10,511	12,725
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	1,883
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	54,238	30,364	27,665
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	1,601
FINANCIAL ASSETS AT AMORTIZED COST	908,403
LOANS AND RECEIVABLES		885,470	826,767
Loans and advances - Central banks
ASSETS
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	9,226
FINANCIAL ASSETS AT AMORTIZED COST	15,601
LOANS AND RECEIVABLES		26,278	27,973
Loans and advances - Credit institutions
ASSETS
FINANCIAL ASSETS HELD FOR TRADING		1,696	3,221
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	2
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	23,097	9,889	10,069
FINANCIAL ASSETS AT AMORTIZED COST	35,480
LOANS AND RECEIVABLES		39,567	35,424
Loans and advances - Customers
ASSETS
FINANCIAL ASSETS HELD FOR TRADING	202	8,815	9,504
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	1,881
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	21,915	20,475	17,596
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	1,601
FINANCIAL ASSETS AT AMORTIZED COST	€ 857,322
LOANS AND RECEIVABLES		€ 819,625	€ 763,370

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Memorandum Items [Abstract]
Acquired in lease, investment property	€ 98	€ 96	€ 115
Contingent Liabilities And Contingent Commitments [Member]
Memorandum Items [Abstract]
Off-balance sheet amounts	304,195
Loan commitments
Memorandum Items [Abstract]
Off-balance sheet amounts	218,083	207,671	202,097
Financial Guarantees
Memorandum Items [Abstract]
Off-balance sheet amounts	11,723	14,499	17,244
Other Commitments [Member]
Memorandum Items [Abstract]
Off-balance sheet amounts	74,389	64,917	57,055
Financial liabilities at amortized cost
Memorandum Items [Abstract]
Subordinated liabilities	23,820	21,510	19,902
Financial assets held for trading, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	23,495	50,891	38,145
Financial assets designated at fair value through profit or loss, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	6,477	5,766	2,025
Financial assets at fair value through other comprehensive income, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	35,558
Financial assets available for sale, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights		43,079	23,980
Financial assets at amortised cost, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	€ 18,271
Loans and receivables, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights		8,147	7,994
Held-to-maturity investments, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights		€ 6,996	€ 2,489

Consolidated Income Statements

Consolidated Income Statements - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	€ 54,325	€ 56,041	€ 55,156
Other interest income	2,284	2,561	2,550
Interest expense	(19,984)	(21,745)	(24,067)
Interest income / charges	34,341	34,296	31,089
Dividend income	370	384	413
Income from companies accounted for using the equity method	737	704	444
Commission income	14,664	14,579	12,943
Commission expense	(3,179)	(2,982)	(2,763)
Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net	604	404	869
Gains or losses on financial assets and liabilities at amortised cost, net	39
Other financial assets and liabilities	565
Gains or losses on financial assets and liabilities held for trading, net	1,515	1,252	2,456
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss	331
Gains or losses on financial assets and liabilities measured at fair value through profit or loss, net	(57)	(85)	426
Gains or losses from hedge accounting, net	83	(11)	(23)
Exchange differences, net	(679)	105	(1,627)
Other operating income	1,643	1,618	1,919
Other operating expenses	(2,000)	(1,966)	(1,977)
Income from assets under insurance and reinsurance contracts	3,175	2,546	1,900
Expenses from liabilities under insurance and reinsurance contracts	(3,124)	(2,489)	(1,837)
Total income	48,424	48,355	44,232
Administrative expenses	(20,354)	(20,400)	(18,737)
Staff costs	(11,865)	(12,047)	(11,004)
Other general administrative expenses	(8,489)	(8,353)	(7,733)
Depreciation and amortisation cost	(2,425)	(2,593)	(2,364)
Provisions or reversal of provisions, net	(2,223)	(3,058)	(2,508)
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	(8,986)	(9,259)	(9,626)
Profit from operations	25,645	25,362	23,131
Impairment or reversal of impairment of investments in subsidiaries, joint ventures and associates, net	(17)	(13)	(17)
Impairment or reversal of impairment on non-financial assets, net	(190)	(1,260)	(123)
Impairment or reversal of impairment on tangible assets, net	(83)	(72)	(55)
Impairment or reversal of impairment on intangible assets, net	(117)	(1,073)	(61)
Impairment or reversal of impairment on other assets, net	10	(115)	(7)
Gains or losses on non-financial assets and investments, net	28	522	30
Negative goodwill recognized in results	67		22
Gains or losses on non-current assets held for sale not classified as discontinued operations	(123)	(203)	(141)
Operating profit / (loss) before tax	14,201	12,091	10,768
Tax expense or income from continuing operations	(4,886)	(3,884)	(3,282)
Profit from continuing operations	9,315	8,207	7,486
CONSOLIDATED PROFIT FOR THE YEAR	9,315	8,207	7,486
Profit (loss), attributable to [abstract]
Profit attributable to non-controlling interests	1,505	1,588	1,282
Profit attributable to the parent	€ 7,810	€ 6,619	€ 6,204
Earnings per share [abstract]
Basic	€ 0.449	€ 0.404	€ 0.401
Diluted	€ 0.448	€ 0.403	€ 0.399
Financial assets at fair value through other comprehensive income, category
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	€ 4,481	€ 4,384	€ 4,522
Dividend income	106
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	(1)
Financial assets at amortised cost, category
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	47,560	49,096	48,084
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	€ (8,985)	(8)	(52)
Financial assets available for sale, category
IFRS Statement [Line Items]
Dividend income		150	196
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net		(10)	11
Loans and receivables, category
IFRS Statement [Line Items]
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net		€ (9,241)	(9,557)
Held-to-maturity investments, category
IFRS Statement [Line Items]
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net			€ (28)

Statements of Recognized Income

Statements of Recognized Income and Expense - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of comprehensive income [abstract]
CONSOLIDATED PROFIT FOR THE YEAR	€ 9,315	€ 8,207	€ 7,486
OTHER RECOGNIZED INCOME AND EXPENSE	(1,899)	(7,320)	(303)
Total items that will not be reclassified to profit or loss	332	(88)	(806)
Actuarial gains and losses on defined benefit pension plans	618	(157)	(1,172)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates	1	1	(1)
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	(174)
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	109
Income tax relating to items that will not be reclassified to profit or loss	(222)	68	367
Total items that may be reclassified to profit or loss	(2,231)	(7,232)	503
Hedges of net investments in foreign operations (Effective portion)	(2)	614	(1,329)
Revaluation gain (losses)	(2)	614	(1,330)
Amounts transferred to income statement			1
Exchanges differences	(1,874)	(8,014)	676
Revaluation gains (losses)	(1,874)	(8,014)	682
Amounts transferred to income statement			(6)
Cash flow hedges (Effective portion)	174	(441)	495
Revaluation gains (losses)	491	501	6,231
Amounts transferred to income statement	(317)	(942)	(5,736)
Financial assets available-for-sale		683	1,326
Revaluation gains (losses)		1,137	2,192
Amounts transferred to income statement		(454)	(866)
Debt instruments at fair value with changes in other comprehensive income	(591)
Revaluation gains (losses)	(29)
Amounts transferred to income statement	(562)
Share of other recognized income and expense of investments	(77)	(70)	80
Income tax relating to items that may be reclassified to profit or loss	139	(4)	(745)
Total recognized income and expenses	7,416	887	7,183
Comprehensive income, attributable to non-controlling interests	1,396	1,005	1,656
Comprehensive income, attributable to the parent	€ 6,020	€ (118)	€ 5,527

Statements of Changes in Total

Statements of Changes in Total Equity - EUR (€) € in Millions	Capital	Share premium [Member]	Equity instruments issued (not capital)	Other equity instruments	Accumulated retained earnings	Other reserves [Member]	Own equity instruments	Parent result for the period	Dividends	Other comprehensive income	Other comprehensive income non-controlling interests	Other elements	Total
Equity at beginning of period at Dec. 31, 2015	€ 7,217	€ 45,001		€ 214	€ 46,429	€ (669)	€ (210)	€ 5,966	€ (1,546)	€ (14,362)	€ (1,227)	€ 11,940	€ 98,753
Total recognized income and expense								6,204		(677)	374	1,282	7,183
Other changes in equity	74	(89)		26	3,524	(280)	203	(5,966)	(121)			(608)	(3,237)
Issuance of ordinary shares	74	(89)				15						534	534
Capital reduction												(22)	(22)
Dividends					(722)				(1,667)			(800)	(3,189)
Purchase of equity instruments							(1,380)						(1,380)
Disposal of equity instruments						15	1,583						1,598
Transfers between equity items					4,246	174		(5,966)	1,546
Increases or ( ) decreases due to business combinations												(197)	(197)
Share-based payment				(79)									(79)
Other increases or ( ) decreases of the equity				105		(484)						(123)	(502)
Equity at end of period at Dec. 31, 2016	7,291	44,912		240	49,953	(949)	(7)	6,204	(1,667)	(15,039)	(853)	12,614	102,699
Total recognized income and expense								6,619		(6,737)	(583)	1,588	887
Other changes in equity	777	6,141	€ 525	(24)	3,484	(653)	(15)	(6,204)	(362)			(422)	3,247
Issuance of ordinary shares	777	6,141				6						543	7,467
Issuance of other financial instruments			525									592	1,117
Capital reduction												(10)	(10)
Dividends					(802)				(2,029)			(665)	(3,496)
Purchase of equity instruments							(1,309)						(1,309)
Disposal of equity instruments						26	1,294						1,320
Transfers between equity items					4,286	251		(6,204)	1,667
Increases or ( ) decreases due to business combinations												(39)	(39)
Share-based payment				(72)								24	(48)
Other increases or ( ) decreases of the equity				48		(936)						(867)	(1,755)
Equity at end of period at Dec. 31, 2017	8,068	51,053	525	216	53,437	(1,602)	(22)	6,619	(2,029)	(21,776)	(1,436)	13,780	106,833
Adjustments due to changes in accounting policies						(1,473)				1,425	253	(1,545)	(1,340)
Opening balance	8,068	51,053	525	216	53,437	(3,075)	(22)	6,619	(2,029)	(20,351)	(1,183)	12,235	105,493
Total recognized income and expense								7,810		(1,790)	(109)	1,505	7,416
Other changes in equity	50	(60)	40	18	3,319	(492)	(37)	(6,619)	(208)			(1,559)	(5,548)
Issuance of ordinary shares	50	(60)				10
Dividends					(968)				(2,237)			(687)	(3,892)
Purchase of equity instruments							(1,026)						(1,026)
Disposal of equity instruments							989						989
Transfers between equity items					4,287	303		(6,619)	2,029
Increases or ( ) decreases due to business combinations						59						(660)	(601)
Share-based payment				(74)								17	(57)
Other increases or ( ) decreases of the equity			40	92		(864)						(229)	(961)
Equity at end of period at Dec. 31, 2018	€ 8,118	€ 50,993	€ 565	€ 234	€ 56,756	€ (3,567)	€ (59)	€ 7,810	€ (2,237)	€ (22,141)	€ (1,292)	€ 12,181	€ 107,361

Statements of Cash Flows

Statements of Cash Flows - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of cash flows [abstract]
CASH FLOWS FROM OPERATING ACTIVITIES	€ 3,416	€ 40,188	€ 21,823
CONSOLIDATED PROFIT FOR THE YEAR	9,315	8,207	7,486
Adjustments made to obtain the cash flows from operating activities	21,714	23,927	22,032
Depreciation and amortization	2,425	2,593	2,364
Other adjustments	19,289	21,334	19,668
Net increase/(decrease) in operating assets	51,550	18,349	17,966
Increase/(decrease) in financial assets held for trading	(31,656)	(18,114)	6,234
Increase/(decrease) in non-trading financial assets mandatorily at fair value through profit or loss	5,795
Increase/(decrease) in financial assets at fair value through profit or loss	16,275	3,085	(12,882)
Increase/(decrease) in financial assets at fair value through other comprehensive income	(2,091)
Increase/(decrease) in financial assets available for sale		2,494	(7,688)
Increase/(decrease) in financial assets at amortised cost	61,345
Increase/(decrease) in loans and receivables		32,379	27,938
Increase/(decrease) in other operating assets	1,882	(1,495)	4,364
Net increase/(decrease) in operating liabilities	27,279	30,540	13,143
Increase/(decrease) in financial liabilities held for trading	(36,315)	1,933	8,032
Increase/(decrease) in financial liabilities designated at fair value through profit or loss	8,312	19,906	(13,450)
Increase (decrease) in financial liabilities at amortized cost	60,730	12,006	21,765
Increase/(decrease) in other operating liabilities	(5,448)	(3,305)	(3,204)
Income tax recovered/(paid)	(3,342)	(4,137)	(2,872)
CASH FLOWS FROM INVESTING ACTIVITIES	3,148	(4,008)	(13,764)
Payments for investing	12,936	10,134	18,204
Payments for tangible assets	10,726	7,450	6,572
Payments for intangible assets	1,469	1,538	1,768
Payments for investments	11	8	48
Payments for subsidiaries and other business units	730	838	474
Payments for held-to-maturity investments		300	9,342
Proceeds from investing	16,084	6,126	4,440
Proceeds from tangible assets	3,670	3,211	2,608
Proceeds from investments	2,327	883	459
Proceeds from subsidiaries and other business units	431	263	94
Proceeds from non-current assets held for sale and associated liabilities	9,656	1,382	1,147
Proceeds from held-to-maturity investments		387	132
CASH FLOWS FROM FINANCING ACTIVITIES	(3,301)	4,206	(5,745)
Payments for financing	7,573	7,783	9,744
Payments for dividends	3,118	2,665	2,309
Payments of subordinated liabilities	2,504	2,007	5,112
Payments for acquisition of own equity instruments	1,026	1,309	1,380
Other payments related to financing activities	925	1,802	943
Proceeds from financing	4,272	11,989	3,999
Proceeds from subordinated liabilities	3,283	2,994	2,395
Proceeds from issuance of own equity instruments		7,072
Proceeds from disposal of own equity instruments	989	1,331	1,604
Other proceeds related to financing activities		592
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	(595)	(5,845)	(3,611)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	2,668	34,541	(1,297)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	110,995	76,454	77,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	€ 113,663	€ 110,995	€ 76,454

Statements of Cash Flows (Paren

Statements of Cash Flows (Parenthetical) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Memorandum Items [Abstract]
Cash	€ 10,370	€ 8,583	€ 8,413
Cash equivalents at central banks	89,005	87,430	54,637
Other financial assets	14,288	14,982	13,404
Total cash and cash equivalents	€ 113,663	€ 110,995	€ 76,454

Introduction, basis of presenta

Introduction, basis of presentation of the Consolidated Financial Statements and other information	12 Months Ended
	Dec. 31, 2018
Intro, basis of presentation of the consolidated financial statements and other information
Introduction, basis of presentation of the consolidated financial statements and other information	Banco Santander, S.A. and Companies composing Santander Group Notes to the consolidated financial statements (consolidated annual accounts) for the year ended December 31, 2018 1. Introduction, basis of presentation of the consolidated financial statements (consolidated annual accounts) and other information a) Banco Santander, S.A. (“the Bank” or “Banco Santander”) is a private-law entity subject to the rules and regulations applicable to banks operating in Spain. The Bylaws and other public information on the Bank can be consulted at its registered office at Paseo de Pereda 9-12, Santander. In addition to the operations carried on directly by it, the Bank is the head of a group of subsidiaries that engage in various business activities and which compose, together with it, Santander Group (“the Group”). Therefore, the Bank is obliged to prepare, in addition to its own separate financial statements, the Group's consolidated financial statements, which also include the interests in joint ventures and investments in associates. At December 31, 2018, the Group consisted of 719 subsidiaries of Banco Santander, S.A. In addition, other 170 companies are associates of the Group, joint ventures or companies of which the Group holds more than 5% (excluding the Group companies of negligible interest with respect to the fair presentation that the annual accounts must express). b) Under Regulation (EC) no. 1606/2002 of the European Parliament and of the Council of July 19, 2002 all companies governed by the law of an EU Member State and whose securities are admitted to trading on a regulated market of any Member State must prepare their consolidated financial statements for the years beginning on or after January 1, 2005 in conformity with the International Financial Reporting Standards (“IFRSs”) previously adopted by the European Union (“EU-IFRSs”). In order to adapt the accounting system of Spanish credit institutions to the new standards, the Bank of Spain issued Circular 4/2004, of 22 December on Public and Confidential Financial Reporting Rules and Formats, which was repealed on January 1, 2018 by the Circular 4/2017 issued by the Bank of Spain on November 27, 2017 and subsequent modifications. The Group's consolidated financial statements for 2018 were authorised by the Bank's directors (at the board meeting on February 26, 2019) in accordance with International Financial Reporting Standards as adopted by the European Union and with Bank of Spain Circular 4/2017 and subsequent modifications, and Spanish corporate and commercial law applicable to the Group, using the basis of consolidation, accounting policies and measurement bases set forth in Note 2, accordingly, they present fairly the Group's equity and financial position at December 31, 2018, 2017 and 2016 and the consolidated results of its operations and the consolidated cash flows in 2018, 2017 and 2016. These consolidated financial statements were prepared from the accounting records kept by the Bank and by the other Group entities, and include the adjustments and reclassifications required to unify the accounting policies and measurement bases applied by the Group. The consolidated financial statements are also in compliance with IFRS as issued by the International Accounting Standards Board (“IFRS – IASB” and together with IFRS adopted by the European Union, “IFRS”). The notes to the consolidated financial statements contain additional information to that presented in the consolidated balance sheet, consolidated income statement, consolidated statement of recognised income and expense, consolidated statement of changes in total equity and consolidated statement of cash flows. The notes provide, in a clear, relevant, reliable and comparable manner, narrative descriptions and breakdowns of these statements. Adoption of new standards and interpretations issued The following modifications came into force and were adopted by the European Union in 2018: - IFRS9 Financial instruments On January 1, 2018, IFRS9 Financial instruments entered into force. IFRS9 establishes the requirements for recognition and measurement of both financial instruments and certain types of non-financial-purchase contracts. The aforementioned requirements should be applied retrospectively, adjusting the opening balance at January 1, 2018, not requiring restatement of the comparative financial statements. The adoption of IFRS9 has resulted in changes in the Groups’ accounting policies for the recognition, classification and measurement of financial assets and liabilities and financial assets impairment. IFRS9 also significantly modifies other standards related to financial instruments such as IFRS7 "Financial instruments: disclosure”. Additionally, IFRS9 includes new hedge accounting requirements which have a twofold objective: to simplify current requirements, and to bring hedge accounting in line with risk management, allowing to be a greater variety of derivative financial instruments which may be considered to be hedging instruments. Furthermore, additional breakdowns are required providing useful information regarding the effect which hedge accounting has on financial statements and also on the entity’s risk management strategy. The treatment of macro-hedges is being developed as a separate project under IFRS9. Entities have the option of continuing to apply IAS39 with respect to accounting hedges until the project has been completed. According to the analysis performed until now, the Group applies IAS39 in hedge accounting. For breakdowns of the notes, according to the regulations in force, the amendments relating to IFRS7 have only been applied to the current period. The breakdowns of the comparative information period notes maintain the breakdowns made in the previous period. The following breakdowns relate to the impact of the adoption of IFRS9 in the Group: a) Classification and measurement of financial instruments The following table shows a comparison between IAS39 as of December 31, 2017 and IFRS9 as of January 1, 2018 of the reclassified financial instruments in accordance with the new requirements of IFRS9 regarding classification and measurement (without impairment), as well as its book value: IAS39 IFRS9 Book value Book value Balance Portfolio (Million of euros) Portfolio (Million of euros) Equity instruments Financial assets available for sale 2,154 Non-trading financial assets mandatorily at fair value through profit or loss 1,651 (including those that were valued at cost at December) Financial assets at fair value through other comprehensive income 533 Loans and receivables 1,537 Non-trading financial assets mandatorily at fair value through profit or loss 1,497 457 Financial assets at fair value through other comprehensive income 486 96 Non-trading financial assets mandatorily at fair value through profit or loss 96 Debt instruments Financial assets available for sale 6,589 Financial assets at amortised cost 6,704 203 Financial assets held for trading 203 Financial assets at fair value through profit or loss 199 Non-trading financial assets mandatorily at fair value through profit or loss 199 Investments held-to-maturity 13,491 Financial assets at amortised cost 13,491 Loans and receivables 10,179 Non-trading financial assets mandatorily at fair value through profit or loss 611 Financial assets at fair value through profit or loss 9,577 Loans and advances Loans and receivables 1,069 Financial assets at fair value through other comprehensive income 1,107 Financial assets held for trading 43 Financial assets at fair value through profit or loss 1,152 Financial assets at amortised cost 1,102 Derivatives Derivatives – hedging accounting (liabilities) 10 Derivatives - financial liabilities held for trading 10 b) Reconciliation of impairment provisions from IAS39 to IFRS9 The following table shows a comparison between IAS39 as of December 31, 2017 and IFRS9 as of January 1, 2018 of the impairment provisions of the financial instruments in accordance with the new requirements of IFRS9: Million of euros IAS39 IFRS9 12-31-2017 Impairment impact 01-01-2018 Financial assets at amortised cost 24,682 1,974 26,656 Loans and advances 23,952 2,002 25,954 Debt instruments 730 (28) 702 Financial assets at fair value through other comprehensive income — 2 2 Debt instruments — 2 2 Commitments and guarantees granted 617 197 814 Total 25,299 2,173 27,472 Additionally, there is an impairment impact on Investments in joint ventures and associates of EUR 34 million. c) Balance sheet reconciliation from IAS39 to IFRS9 The following table shows in detail the reconciliation the consolidated balance sheet under IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 distinguishing between the impacts due to classification and measurement and due to impairment once adopted IFRS9: IAS39 Classification and Impairment IFRS9 ASSETS (Million of euros) 12-31-2017 Naming modifications (*) measurement impact impact 01-01-2018 Cash, cash balances at central banks and other deposits on demand 110,995 — — — 110,995 Financial assets held for trading 125,458 — 160 — 125,618 Derivatives 57,243 — — — 57,243 Equity instruments 21,353 — — — 21,353 Debt instruments 36,351 — 203 — 36,554 Loans and advances 10,511 — (43) — 10,468 Non-trading financial assets mandatorily at fair value through profit or loss — 933 4,054 (c) — 4,987 Equity instruments — 933 1,651 — 2,584 Debt instruments — — 1,792 — 1,792 Loans and advances — — 611 — 611 Financial assets designated at fair value through profit or loss 34,782 (933) 8,226 — 42,075 Equity instruments 933 (933) — — — Debt instruments 3,485 — (199) — 3,286 Loans and advances 30,364 — 8,425 (a) — 38,789 Financial assets at fair value through other comprehensive income — 124,229 2,126 (2) 126,353 Equity instruments — 2,636 533 — 3,169 Debt instruments — 121,593 486 (2) 122,077 Loans and advances — — 1,107 — 1,107 Financial assets available-for-sale 133,271 (124,229) (9,042) — — Equity instruments 4,790 (2,636) (2,154) (c) — — Debt instruments 128,481 (121,593) (6,888) (b) — — Financial assets at amortised cost — 889,779 (a) 21,297 (1,982) (d) 909,094 Debt instruments — 15,557 (b) 20,195 (b) 20 35,772 Loans and advances — 874,222 1,102 (2,002) 873,322 Loans and receivables 903,013 (889,779) (a) (13,242) 8 — Debt instruments 17,543 (15,557) (1,994) (c) 8 — Loans and advances 885,470 (874,222) (11,248) (a,c) — — Investments held to maturity 13,491 — (13,491) (b) — — Investments 6,184 — — (34) 6,150 Other assets (**) 117,111 — 6 680 (e) 117,797 TOTAL ASSETS 1,444,305 — 94 (1,330) 1,443,069 (*) Due to the entry into force of Bank of Spain Circular 4/2017. (**) Includes Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Assets under insurance or reinsurance contracts, Tangible assets, Intangible assets, Tax assets, Other assets and Non-current assets held for sale. a) The amount of the item Loans and receivables at December 31, 2017 is reclassified into Financial assets at amortised cost. Nevertheless, the Group maintained a portfolio of loans and receivables for an approximate amount of EUR 8,600 million, which relate mainly to Brazil, which was designated at amortised cost; as a result of the initial implementation of IFRS9 this portfolio has been designated as fair value and finally it has been reclassified as ‘Financial assets designated at fair value through profit or loss’. b) Instruments classified as Investments held to maturity at December 31, 2017 have been reclassified into Financial assets available-for-sale because of the initial implementation of IFRS9. Additionally, after the review of the business model of cash flow portfolio in different locations, the group has identified certain groups of assets classified at December 31, 2017 as Financial assets available-for-sale, which relate mainly to Mexico, Brazil and Consumer Finance business, whose management is oriented towards the maintenance of financial instruments in a portfolio until maturity end; because of that, this asset group has been reclassified as Financial assets at amortised cost. c) The Group has reclassified in Non-trading financial assets mandatory at fair value through profit or loss those financial instruments which have not comply with the SPPI test (solely payments of principal and interest) classified at December 31, 2017 mainly in Loans and receivables and Financial assets available for sale, which relate mainly to the UK, Spain and Poland. d) It corresponds to the increase in provisions for impairment of the value of the assets included in the item Financial assets at amortised cost derived from the change in accounting policy. e) This corresponds with increase on provisions for the tax effect referred in section d. IAS39 Classification and Impairment IFRS9 LIABILITIES (Million of euros) 12-31-2017 Naming modifications measurement impact impact 01-01-2018 Financial liabilities held for trading 107,624 — 10 — 107,634 Derivatives 57,892 — 10 — 57,902 Short positions 20,979 — — — 20,979 Deposits 28,753 — — — 28,753 Marketable debt securities — — — — — Other financial liabilities — — — — — Financial liabilities designated at fair value through profit or loss 59,616 — — — 59,616 Deposits 55,971 — — — 55,971 Marketable debt securities 3,056 — — — 3,056 Other financial liabilities 589 — — — 589 Financial liabilities at amortised cost 1,126,069 — — — 1,126,069 Deposits 883,320 — — — 883,320 Marketable debt securities 214,910 — — — 214,910 Other financial liabilities 27,839 — — — 27,839 Hedging derivatives 8,044 — (10) — 8,034 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 330 — — — 330 Provisions 14,489 — — 197 14,686 Contingent liabilities and commitments 617 — — 197 814 Other provisions (*) 13,872 — — — 13,872 Other liabilities (**) 21,300 — 41 (3) 21,338 TOTAL LIABILITIES 1,337,472 — 41 194 1,337,707 (*) Includes Pensions and other post-retirements obligations, Other long-term employee benefits, Taxes and other legal contingencies and Other provisions (including guarantees and other contingent liabilities). (**) Includes Liabilities under insurance or reinsurance contracts, Tax liabilities, Other liabilities and Liabilities associated with non-current assets held for sale. IAS39 Classification and Impairment IFRS9 EQUITY (Million of euros) 12-31-2017 Naming modifications (*) measurement impact impact 01-01-2018 Shareholders’ equity 116,265 — 91 (1,401) 114,955 Capital 8,068 — — — 8,068 Share premium 51,053 — — — 51,053 Equity instruments issued other than capital 525 — — — 525 Other equity 216 — — — 216 Accumulated retained earnings 53,437 — — — 53,437 Revaluation reserves — — — — — Other reserves (1,602) — 91 (1,401) (2,912) Own shares (22) — — — (22) Profit attributable to shareholders of the parent 6,619 — — — 6,619 Interim dividends (2,029) — — — (2,029) Other comprehensive income (21,776) — (53) — (21,829) Items not reclassified to profit or loss (4,034) 919 (152) — (3,267) Actuarial gains or losses on defined benefit pension plans (4,033) — — — (4,033) Non-current assets held for sale — — — — — Share in other income and expenses recognised in investments in joint ventures and associates (1) 5 (5) — (1) Other valuation adjustments — — — — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income — 914 (141) — 773 Inefficacy of fair value hedges of equity instruments measured at fair value with changes in other comprehensive income — — — — — Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk — — (6) — (6) Items that may be reclassified to profit or loss (17,742) (919) 99 — (18,562) Hedge of net investment in foreign operations (effective portion) (4,311) — — — (4,311) Exchange differences (15,430) — — — (15,430) Hedging derivatives. Cash flow hedges (effective portion) 152 — — — 152 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income — 1,154 99 — 1,253 Hedging instruments (items not designated) — — — — — Financial assets available for sale 2,068 (2,068) — — — Debt instruments 1,154 (1,154) — — — Equity instruments 914 (914) — — — Non-current assets held for sale — — — — — Share in other income and expenses recognised in investments in joint ventures and associates (221) (5) — — (226) Non controlling interests 12,344 — 15 (123) 12,236 Other comprehensive income (1,436) — 3 — (1,433) Other elements 13,780 — 12 (123) 13,669 EQUITY 106,833 — 53 (1,524) 105,362 TOTAL EQUITY AND LIABILITIES 1,444,305 — 94 (1,330) 1,443,069 (*) Due to the entry into force of Bank of Spain Circular 4/2017. The Group has chosen to apply a progressive 5-year transition period in accordance with Regulation (EU) 2017/2395 of the European Parliament and of the Council amending Regulation (EU) 575/2013 as regards transitional provisions to mitigate the impact of the introduction of IFRS9 on shareholders' equity. If the transitional provision of IFRS 9 had not been applied, the total impact of the fully loaded CET1 ratio on December 31, 2018 would be -27 b.p. - IFRS15 Revenue from Contracts with Customers (effective for annual reporting periods beginning on or after January 1, 2018) - the new standard on the recognition of revenue from contracts with customers. It supersedes the following standards and interpretations previous in force: IAS18, Revenue; IAS11, Construction Contracts; IFRIC 13, Customer Loyalty Programs; IFRIC 15, Agreements for the Construction of Real Estate; IFRIC 18, Transfers of Assets from Customers; and SIC-31, Revenue-Barter Transactions Involving Advertising Services. Under IFRS15, an entity recognises revenue in accordance with the core principle of the standard by applying the following five steps: identify the contract(s) with a customer; identify the performance obligations in the contract; determine the transaction price; allocate the transaction price to the performance obligations identified in the contract; and recognise revenue when as the entity satisfies a performance obligation. - Clarifications to IFRS15 income coming from contracts with clients. Given that IFRS15 does not apply to financial instruments and other contractual rights or obligations under the scope of IFRS9, no significant effects derived from the application of the aforementioned Accounting Standard and its clarifications in the Group's consolidated financial statements. - Modification to IFRS4 "Insurance contracts" applying IFRS9 "Financial Instruments" (effective for annual reporting periods beginning on or after January 1, 2018). The purpose of the amendment is to give all companies that issue insurance contracts the option to recognize in other comprehensive income, instead of profit or loss, the volatility that could arise when applying IFRS9, for new contracts before the adoption of the insurance standard and give companies whose activities are mostly insurance-related an optional temporary exemption from the application of IFRS9 until the year 2021. Entities that defer the application of IFRS9 will continue to apply the existing norm of Financial Instruments IAS39. The deferral of the aforementioned accounting standard did not apply because of non-compliance with the conditions required for it. - Modification to the IFRS2 Classification and measurement of share-based payment transactions – The amendments address the following areas: (a) Accounting for the effects that the requirements for the consolidation of the grant have in cash–settled share-based payment transactions, (b) Classification of share–based payment transactions with net settlement features for the tax withholding obligations; and (c) Accounting for modifications of share-based payment transactions terms and conditions from cash-settled to equity-settled payment transactions. - Modification of IAS40 Transfers of investment properties; changes are made to the existing requirements or provide with some additional guidance on the implementation of such requirements. - Improvements to IFRS Cycle 2014-2016 - introduce minor amendments to IFRS1, referring to the elimination of short-term exemptions for entities adopting IFRS for the first time, and IAS28, related to the valuation of an investment in an associated or a joint venture at fair value. Minor amendments to IFRS12 regarding this cycle came into force for the years beginning on January 1, 2017. - Interpretation to IFRIC 22 on Foreign currency transactions and advance considerations – When an entity reports a payment of advance consideration in order to recognise the profits associated to the income statement, it shall recognise both the consideration received as a non-monetary liability (deferred income or contract liabilities) in the statement of financial position at the exchange rate obtained according to the IAS21 The effects of changes in foreign exchange rates. When the deferred incomes are subsequently recognised in the income statement as incomes, the issue is raised on whether its measurement should reflect: the amount at which the deferred income was originally recognised, namely, when the consideration was originally received; or the consideration amount received is translated to the existing exchange rate on the date when the non-monetary element is generated as income in the income statement, generating an exchange gain or loss that reflects the difference between the amount of the consideration translated (i) to the exchange rate in force in the moment of its receipt and (ii) to the exchange rate I force when it is recognised in the income statement as a profit or loss. The application of the aforementioned accounting standards did not have any material effects of the Group´s consolidated financial statements. Also, at the date of preparation of these consolidated financial statements, the following amendments with an effective date subsequent to December 31, 2018 were in force: - IFRS16 Leases substitutes IAS17, IFRIC (International Financial Reporting Interpretation Committee) 4, SIC (Standard Interpretations Committee)-15 and SIC-27. It was adopted by the European Union on October 31, 2017 through the Regulation (EU) 2017/1986. IFRS16 (effective for annual periods beginning on or after January 1, 2019, with an early adoption option that the Group has not applied) establishes the principles for the recognition, measurement, presentation and breakdown of lease contracts, with the objective of reporting information that faithfully represents the lease transactions. IFRS16 provides a single accounting model for the lessee, whereby the lessee must recognise the assets by right of use and the corresponding lease liabilities of all the lease contracts, unless the lease term is 12 months or less or the underlying asset is of low value. Transition The criteria established by the Standard for the registration of the lease contracts will be applied in a retrospective modified way adjusting the opening balance on the first day of application (January 1, 2019). The Group, has decided to apply the practical solution allowed by the Standard of not evaluating in the first application of the contracts are or contain a lease (under the new definition), and therefore, the IFRS16 will only apply to those contracts that were previously identified as lease contracts. The Group has estimated an impact due to the first standard adoption on the ordinary capital ratio (Common Equity Tier 1 – CET 1) fully loaded of -20 b.p. Likewise, it is estimated that assets with the right to use will be approximately recognised by an amount of EUR 6.7 thousand million. The main causes of this impact are the requirements of registration of the asset with the right to use derived from all the lease contracts active during the first application. Thus, the impact being greater for the Groups leased properties. The following are the main policies, estimates and criteria for the application of IFRS16 currently defined by the Group for its practical adoption: - Lease term: in general, the lease term of each contract will coincide with the initial term established. With regard to property contracts, in certain cases the possible consideration of exercising extension or early cancellation options has been evaluated, based mainly on market factors specific to each asset in each geography. - Discount rate: taking into account that the Group has opted to apply the modified standard retrospectively, the discount rate used in transition will be the lessee's incremental borrowing rate at this date. For these purposes, the entity has calculated this incremental interest rate taking as a reference the quoted debt instruments issued by the Group. In this regard, the Group has estimated different interest rate curves based on the currency and economic environment in which the contracts are located. - Practical exemptions in transition: the Group has considered the practical solutions defined in paragraph C10 of the standard in the application of the modified retrospective method. This application was made on a contract-by-contract basis, and none of the exemptions were generally applied. Strategy of implementation of the IFRS16 and governance The Group established a global project and multidisciplinary with the objective of adapting its processes to the new Standard of accounting of the lease contracts, granting that said processes are adopted in a homogenous way in all the units of the Group, and at the same time, to the particularities of each unit. Thus, the Group has worked since 2017 in the analysis and identification of the contracts affected by the Standard, as well as the definition of the main technical criteria that affects the accounting of the lease contracts. With respect to the structure of the project´s governance, the Group has established a periodic meeting of the direction of the project, and a team in charge of granting the participation of the responsible teams and coordination with all the geographies. Main steps and milestones of the project In relation to the entry of this new Standard, the Group reported in the interim condensed financial statements as of 30 June 2018 the progress to that date of the implementation plan of the same. The Group has prepared the accounting policy and a methodological framework that has been the benchmark for the development of the implementation carried out in the different local units. The internal regulation has been approved under the relevant corporate bodies before the entry into force of the Standard. Likewise, the corporate development of the control model over the registration process of the lease contracts is complete, both in transition and once the Standard is applied. The proposed model includes a reference design of the controls to be employed in the new developments made for the implementation of the Standard. - IFRIC 23: The uncertainty over income tax treatment; - (mandatory for annual periods starting from January 1, 2019) it applies to the tax gain or loss determination, tax bases, effects of tax laws, taxes and interest rates, when there is uncertainty about taxes treatment according to IAS12. - Modification of IFRS9 Financial instruments - (mandatory for annual periods starting from January 1, 2019) a clarification has been published on the treatment of certain prepayment options in relation to the evaluation of contractual flows of principal and interest of financial instruments. - Modification of IAS28 Investments in associates and joint ventures - (mandatory for annual periods starting from January 1, 2019). The amendments clarify the accounting for long-term interests in an associate or joint venture, which in substance form part of the net investment in the associate or joint venture, but to which equity accounting is not applied. Entities must account for such interests under IFRS9 Financial instruments before applying the loss allocation and impairment requirements in IAS28 Investments in associates and joint ventures. Lastly, at the date of preparation of these consolidated financial statements, the following standards which effectively come into force after December 31, 2018 had not yet been adopted by the European Union: - IFRS17 Insurance contracts; it is a new integrated accounting standard for insurance contracts, which includes recognition, measurement, presentation and disclosure. - Modification of IFRS Cycle 2015 - 2017- introduces minor amendments to IFRS3, IFRS11, IAS12 and IAS23. - Modification of IAS19 Benefits to employees – amendments, reductions and agreements on defined benefit plans are introduced. - Modification of IFRS conceptual framework: The IFRS Framework, which sets out the fundamental concepts of financial reporting, is amended. The revised Framework includes: a new chapter about measurement; guidance on financial reporting; improved definitions, in particular the definition of liabilities; and clarifications such as management functions, prudence and measurement uncertainty in financial reporting. It will apply from January 1, 2020. - Modification of IFRS3 Business combinations - amendments are introduced. The amendments are intended to assist entities to determine whether a transaction should be accounted for as a business combination or as an asset acquisition. IFRS3 continues to adopt a market participant’s perspective to determine whether an acquired set of activities and assets is a business. The amendments are mainly due to: clarify the minimum requirements for a business; remove the assessment of whether market participants are capable of replacing any missing elements; add guidance to help entities assess whether an acquired process is substantive; narrow the definitions of a business and of outputs; and introduce an optional fair value concentration test. - Mod ification of IAS1 and IAS8 - A new definition of material is incorporated. The amendments clarify the accounting treatment for sales or the contribution of assets between an investor and its associates or joint ventures. They confirm that the accounting treatment depends on whether the non-monetary assets sold or contributed to an associate or joint venture constitute a "business" (as defined in IFRS3, Business combination). The Group is currently analysing the possible effects of these new standards and interpretations. All accounting policies and measurement bases with a material effect on the consolidated financial statements for 2018 were applied in their preparation. c) The consolidated results and the determination of consolidated equity are sensitive to the accounting policies, measurement bases and estimates used by the directors of the Bank in preparing the consolidated financial statements. The main accounting policies and measurement bases are set forth in Note 2. In the consolidated financial statements estimates were occasionally made by the senior management of the Bank and of the consolidated entities in order to quantify certain of the assets, liabilities, income, expenses and obligations reported herein. These estimates, which were made on the basis of the best information available, relate basically to the following: - The impairment losses on certain assets: it applies to financial assets at fair value through other comprehensive income, financial assets at amortised cost, non-current assets held for sale, investments, tangible assets and intangible assets (see Notes 6, 7, 8, 10, 12, 13, 16, 17 and 18); - The assumptions used in the actuarial calculation of the post-employment benefit liabilities and commitments and other obligations (see Note 25); - The useful life of the tangible and intangible assets (see Notes 16 and 18); - The measurement of goodwill arising on consolidation (see Note 17); - The calculation of provisions and the consideration of contingent liabilities (see Note 25); - The fair value of certain unquoted assets and liabilities (see Notes 6, 7, 8, 9, 10, 11, 20, 21 and 22); - The recoverability of deferred tax assets (see Note 27); and - The fair value of the identifiable assets acquired and the liabilities assumed in business combinations (see Note 3). Although these estimates were made on the basis of the best information available at 2018 year-end, future events might make it necessary to change these estimates (upwards or downwards) in coming years. Changes in accounting estimates would be applied prospectively, recognising the effects of the change in estimates in the related consolidated income statement. d) In July 2014, the IASB published IFRS9, which was adopted with

Accounting policies

Accounting policies	12 Months Ended
	Dec. 31, 2018
Accounting policies
Accounting policies	2. Accounting policies The accounting policies applied in preparing the consolidated financial statements were as follows: a) Foreign currency transactions i. The Bank’s functional and presentation currency is the euro. Also, the presentation currency of the Group is the euro. ii. Foreign currency balances are translated to euros in two consecutive stages: - Translation of foreign currency to the functional currency (currency of the main economic environment in which the entity operates); and - Translation to euros of the balances held in the functional currencies of entities whose functional currency is not the euro. Translation of foreign currency to the functional currency Foreign currency transactions performed by consolidated entities (or entities accounted for using the equity method) not located in European Monetary Union (“EMU”) countries are initially recognised in their respective currencies. Monetary items in foreign currency are subsequently translated to their functional currencies using the closing rate. Furthermore: - Non-monetary items measured at historical cost are translated to the functional currency at the exchange rate at the date of acquisition. - Non-monetary items measured at fair value are translated at the exchange rate at the date when the fair value was determined. - Income and expenses are translated at the average exchange rates for the year for all the transactions performed during the year. When applying this criterion, the Group considers whether there have been significant changes in the exchange rates in the year which, in view of their materiality with respect to the consolidated financial statements taken as a whole, would make it necessary to use the exchange rates at the transaction date rather than the aforementioned average exchange rates. - The balances arising from non-hedging forward foreign currency/foreign currency and foreign currency/euro purchase and sale transactions are translated at the closing rates prevailing in the forward foreign currency market for the related maturity. Translation of functional currencies to euros The balances in the financial statements of consolidated entities (or entities accounted for using the equity method) whose functional currency is not the euro are translated to euros as follows: - Assets and liabilities, at the closing rates. - Income and expenses, at the average exchange rates for the year. - Equity items, at the historical exchange rates. iii. The exchange differences arising on the translation of foreign currency balances to the functional currency are generally recognised at their net amount under Exchange differences in the consolidated income statement, except for exchange differences arising on financial instruments at fair value through profit or loss, which are recognised in the consolidated income statement without distinguishing them from other changes in fair value, and for exchange differences arising on non-monetary items measured at fair value through equity, which are recognised under Other comprehensive income–Items that may be reclassified to profit or loss–Exchange differences (See note 29). The exchange differences arising on the translation to euros of the financial statements denominated in functional currencies other than the euro are recognised in Other comprehensive income–Items that may be reclassified to profit or loss–Exchange differences in the consolidated balance sheet, whereas those arising on the translation to euros of the financial statements of entities accounted for using the equity method are recognised in equity under Other comprehensive income–Items that may be reclassified to profit or loss and Items not reclassified to profit or loss–Other recognised income and expense of investments in subsidiaries, joint ventures and associates (See note 29), until the related item is derecognised, at which time they are recognised in profit or loss. Exchange differences arising on actuarial gains or losses when converting to euros the financial statements denominated in the functional currencies of entities whose functional currency is different from the euro are recognised under equity–Other comprehensive income–Items not reclassified to profit or loss–Actuarial gains or (-) losses on defined benefit pension plans (See note 29). iv. Exchange differences arising on the translation to the Group´s presentation currency of financial statements denominated in functional currencies other than euro of countries with high inflation rates are recorded in the consolidated statement of changes in total equity - Other reserves. At December 31, 2017 and 2016 none of the functional currencies of the consolidated entities and associates located abroad related to hyperinflationary economies as defined by International Financial Reporting Standards as adopted by the European Union. Accordingly, at the end of these reporting periods it was not necessary to adjust the financial statements of any of the consolidated entities or associates to correct for the effect of inflation. At December 31, 2018 the economic situation in Argentina which led to the review by the Group of the macroeconomic indicators that affect Argentina’s economy and from this review the Group has concluded the need to apply to these annual financial statements the accounting standard IAS29 for hyperinflationary economies to its activity in Argentina (See note 1.h). v. The Group hedges a portion of its long-term foreign currency positions using foreign exchange derivative financial instruments (see Note 36). Also, the Group manages foreign currency risk dynamically by hedging its short-term position (with a potential impact on profit or loss) in order to limit the impact of currency depreciations while optimising the cost of financing the hedges. The following tables show the sensitivity of the consolidated income statement and consolidated equity to changes in exchange positions arising from investments in Group companies with currencies other than the euro and their results, due to percentage changes of 1% in the various foreign currencies in which the Group maintains significant balances. The estimated effect on the consolidated equity attributable to the Group and on consolidated profit of a 1% appreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar (162.3) (157.9) (187.1) (4.1) (1.4) (4.5) Chilean peso (22.9) (29.0) (27.9) (5.1) (1.8) (4.2) Pound sterling (171.2) (176.6) (184.9) (4.5) (3.1) (10.0) Mexican peso (18.3) (16.0) (16.2) (1.7) (1.2) (5.4) Brazilian real (85.6) (93.1) (122.3) (5.6) (6.5) (6.3) Polish zloty (36.2) (34.5) (31.5) (4.2) (1.5) (3.3) Argentine peso (7.8) (7.4) (9.0) (0.6) (3.5) (3.3) Similarly, the estimated effect on the Group’s consolidated equity and on consolidated profit of a 1% depreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar 165.6 161.1 190.8 4.2 1.5 4.5 Chilean peso 23.4 29.6 28.4 5.2 1.8 4.3 Pound sterling 174.7 180.2 188.7 4.6 3.2 10.2 Mexican peso 18.6 16.3 16.5 1.8 1.2 5.5 Brazilian real 87.4 95.0 124.7 5.7 6.6 6.5 Polish zloty 36.9 35.2 32.1 4.2 1.5 3.3 Argentine peso 8.0 7.6 9.2 0.6 3.6 3.3 The foregoing data were obtained as follows: a. Effect on consolidated equity: in accordance with the accounting policy detailed in Note 2.a.iii, the exchange differences arising on the translation to euros of the financial statements in the functional currencies of the Group entities whose functional currency is not the euro are recognised in consolidated equity. The possible effect that a change in the exchange rates of the related currency would have on the Group’s consolidated equity was therefore determined by applying the aforementioned change to the net value of each unit’s assets and liabilities -including, where appropriate, the related goodwill- and by taking into consideration the offsetting effect of the hedges of net investments in foreign operations. b. Effect on consolidated profit: the effect was determined by applying the fluctuations in the average exchange rates used for the year, as indicated in Note 2.a.ii, to translate to euros the income and expenses of the consolidated entities whose functional currency is not the euro, taking into consideration, where appropriate, the offsetting effect of the various hedging transactions in place. The estimates used to obtain the foregoing data were performed considering the effects of the exchange rate fluctuations in isolation from the effect of the performance of other variables whose changes would affect equity and profit or loss, such as variations in the interest rates of the reference currencies or other market factors. Accordingly, all variables other than the exchange rate fluctuations were kept constant with respect to their positions at December 31, 2018, 2017 and 2016. b) i. Subsidiaries are defined as entities over which the Bank has the capacity to exercise control. The Bank controls an entity when it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. The financial statements of the subsidiaries are fully consolidated with those of the Bank. Accordingly, all balances and effects of the transactions between consolidated companies are eliminated on consolidation. On acquisition of control of a subsidiary, its assets, liabilities and contingent liabilities are recognised at their acquisition-date fair values. Any positive differences between the acquisition cost and the fair values of the identifiable net assets acquired are recognised as goodwill (See Note 17). Negative differences are recognised in profit or loss on the date of acquisition. Additionally, the share of third parties of the Group’s equity is presented under Non-controlling interests in the consolidated balance sheet (See Note 28). Their share of the profit for the year is presented under Profit attributable to non-controlling interests in the consolidated income statement. The results of subsidiaries acquired during the year are included in the consolidated income statement from the date of acquisition to year-end. Similarly, the results of subsidiaries for which control is lost during the year are included in the consolidated income statement from the beginning of the year to the date of disposal. At December 31, 2018 the Group controlled the following company in which it held an ownership interest of less than 50% of the share capital, Luri 1, S.A. apart from the structured consolidated entities. The percentage ownership interest in the aforementioned company is 36% (See Appendix I). Although the Group holds less than half the voting power, it manages and, as a result, exercises control over this entity. The company´s corporate purpose for the entity is the acquisition of real estate and other general operations relating thereto, including rental, and the purchase and sale of properties; the company object of the latter entity is the provision of payment services. The impact of the consolidation of this company on the Group's consolidated financial statements is immaterial. The Appendices contain significant information on the subsidiaries. ii. Joint ventures are deemed to be entities that are not subsidiaries but which are jointly controlled by two or more unrelated entities. This is evidenced by contractual arrangements whereby two or more parties have interests in entities so that decisions about the relevant activities require the unanimous consent of all the parties sharing control. In the consolidated financial statements, investments in joint ventures are accounted for using the equity method, i.e. at the Group’s share of net assets of the investee, after taking into account the dividends received therefrom and other equity eliminations. The profits and losses resulting from transactions with a joint venture are eliminated to the extent of the Group’s interest therein. The Appendices contain significant information on the joint ventures. iii. Associates are entities over which the Bank is in a position to exercise significant influence, but not control or joint control. It is presumed that the Bank exercises significant influence if it holds 20% or more of the voting power of the investee. In the consolidated financial statements, investments in associates are accounted for using the equity method, i.e. at the Group’s share of net assets of the investee, after taking into account the dividends received therefrom and other equity eliminations. The profits and losses resulting from transactions with an associate are eliminated to the extent of the Group’s interest in the associate. There are certain investments in entities which, although the Group owns 20% or more of their voting power, are not considered to be associates because the Group is not in a position to exercise significant influence over them. These investments are not significant for the Group. There are also certain investments in associates where the Group owns less than 20% of the voting rights, as it is determined that it has the capacity to exercise significant influence over them. The impact of these companies is immaterial in the Group's consolidated financial statements. The Appendices contain significant information on the associates. iv. When the Group incorporates entities, or holds ownership interests therein, to enable its customers to access certain investments, or for the transfer of risks or other purposes (also called structured entities since the voting or similar power is not a key factor in deciding who controls the entity), the Group determines, using internal criteria and procedures and taking into consideration the applicable legislation, whether control (as defined above) exists and, therefore, whether these entities should be consolidated. Specifically, for those entities to which this policy applies (mainly investment funds and pension funds), the Group analyses the following factors: - Percentage of ownership held by the Group; 20% is established as the general threshold. - Identification of the fund manager, and verification as to whether it is a company controlled by the Group since this could affect the Group’s ability to direct the relevant activities. - Existence of agreements between investors that might require decisions to be taken jointly by the investors, rather than by the fund manager. - Existence of currently exercisable removal rights (possibility of removing the manager from his position), since the existence of such rights might limit the manager’s power over the fund, and it may be concluded that the manager is acting as an agent of the investors. - Analysis of the fund manager’s remuneration regime, taking into consideration that a remuneration regime that is proportionate to the service rendered does not, generally, create exposure of such importance as to indicate that the manager is acting as the principal. Conversely, if the remuneration regime is not proportionate to the service rendered, this might give rise to an exposure that would lead the Group to a different conclusion. These structured entities also include the securitisation special purpose vehicles (“SPV”), which are consolidated in the case of the SPVs over which, being exposed to variable yield, it is considered that the Group continues to exercise control. The exposure associated with unconsolidated structured entities are not material with respect to the Group’s consolidated financial statements. v. A business combination is the bringing together of two or more separate entities or economic units into one single entity or group of entities. Business combinations whereby the Group obtains control over an entity or a business are recognised for accounting purposes as follows: - The Group measures the cost of the business combination, which is normally the consideration transferred, defined as the acquisition-date fair values of the assets transferred, the liabilities incurred to the former owners of the acquiree and the equity instruments issued, if any, by the acquirer. In cases where the amount of the consideration to be transferred has not been definitively established at the acquisition date, but rather depends on future events, any contingent consideration is recognised as part of the consideration transferred and measured at its acquisition-date fair value. Moreover, acquisition-related costs do not for these purposes form part of the cost of the business combination. - The fair values of the assets, liabilities and contingent liabilities of the acquired entity or business, including any intangible assets identified in the business combination which might not have been recognised by the acquiree, are estimated and recognised in the consolidated balance sheet; the Group also estimates the amount of any non-controlling interests and the fair value of the previously held equity interest in the acquiree. - Any positive difference between the aforementioned items is recognised as discussed in Note 2.m. Any negative difference is recognised under negative goodwill recognised in the consolidated income statement. Goodwill is only calculated and recognised once, when control of a business or an entity is obtained. vi. Acquisitions and disposals not giving rise to a change in control are recognised as equity transactions, and no gain or loss is recognised in the income statement and the initially recognised goodwill is not remeasured. The difference between the consideration transferred or received and the decrease or increase in non-controlling interests, respectively, is recognised in reserves. Similarly, when control over a subsidiary is lost, the assets, liabilities and non-controlling interests and any other items recognised in Other Comprehensive income of that company are derecognised from the consolidated balance sheet, and the fair value of the consideration received and of any remaining equity interest is recognised. The difference between these amounts is recognised in profit or loss. vii. Note 3 provides information on the most significant acquisitions and disposals in the last three years. c) i. A financial instrument is any contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity. An equity instrument is a contract that evidences a residual interest in the assets of the issuing entity after deducting all of its liabilities. A financial derivative is a financial instrument whose value changes in response to the change in an observable market variable (such as an interest rate, foreign exchange rate, financial instrument price, market index or credit rating), whose initial investment is very small compared with other financial instruments with a similar response to changes in market factors, and which is generally settled at a future date. Hybrid financial instruments are contracts that simultaneously include a non-derivative host contract together with a derivative, known as an embedded derivative, that is not separately transferable and has the effect that some of the cash flows of the hybrid contract vary in a way similar to a stand-alone derivative. Compound financial instruments are contracts that simultaneously create for their issuer a financial liability and an own equity instrument (such as convertible bonds, which entitle their holders to convert them into equity instruments of the issuer). The preference shares contingently convertible into ordinary shares eligible as Additional Tier 1 capital (“CCPSs”) -perpetual shares, which may be repurchased by the issuer in certain circumstances, the interest on which is discretionary, and would convert into a variable number of newly issued ordinary shares if the capital ratio of the Bank or its consolidated group falls below a given percentage (trigger event), as those two terms are defined in the related issue prospectuses- are recognised for accounting purposes by the Group as compound instruments. The liability component reflects the issuer’s obligation to deliver a variable number of shares and the equity component reflects the issuer’s discretion in relation to the payment of the related coupons. In order to effect the initial allocation, the Group estimates the fair value of the liability as the amount that would have to be delivered if the trigger event were to occur immediately and, accordingly, the equity component, calculated as the residual amount, is zero. In view of the aforementioned discretionary nature of the payment of the coupons, they are deducted directly from equity. Capital perpetual preference shares (“CPPSs”), with the possibility of purchase by the issuer in certain circumstances, whose remuneration is discretionary, and which will be amortised permanently, totally or partially, in the event that the Bank or its consolidated group submits a capital ratio lesser than a certain percentage (trigger event), as defined in the corresponding prospectuses, are accounted for by the Group as equity instruments. The following transactions are not treated for accounting purposes as financial instruments: - Investments in associates and joint ventures (see Note 13). - Rights and obligations under employee benefit plans (see Note 25). - Rights and obligations under insurance contracts (see Note 15). - Contracts and obligations relating to employee remuneration based on own equity instruments (see Note 34). ii. Financial assets are initially classified into the various categories used for management and measurement purposes, unless they have to be presented as Non-current assets held for sale or they relate to Cash, cash balances at central banks and other deposits on demand, Changes in the fair value of hedged items in portfolio hedges of interest rate risk (asset side), Hedging derivatives and Investments, which are reported separately. Classification of financial instruments: the classification criteria for financial assets depends on the business model for their management and the characteristics of their contractual flows. The Group's business models refer to the way in which it manages its financial assets to generate cash flows. In defining these models, the Group takes into account the following factors: - How key management staff are assessed and reported on the performance of the business model and the financial assets held in the business model. - The risks that affect the performance of the business model (and the financial assets held in the business model) and, specifically, the way in which these risks are managed. - How business managers are remunerated. - The frequency and volume of sales in previous years, as well as expectations of future sales. The analysis of the characteristics of the contractual flows of financial assets requires an assessment of the congruence of these flows with a basic loan agreement. Contractual cash flows that are only principal and interest payments on the outstanding principal amount meet this requirement. Depending on these factors, the asset can be measured at amortised cost, at fair value with changes in other comprehensive income, or at fair value with changes through profit and loss. IFRS9 also establishes an option to designate an instrument at fair value with changes in profit or loss, under certain conditions. The Group uses the following criteria for the classification of financial debt instruments: - Amortised cost: financial instruments under a business model whose objective is to collect principal and interest flows, over which there is no significant unjustified sales and fair value is not a key element in the management of these assets and contractual conditions they give rise to cash flows on specific dates, which are only payments of principal and interest on the outstanding principal amount. In this sense, unjustified sales are considered to be those other than those related to an increase in the credit risk of the asset, unanticipated funding needs (stress case scenarios). Additionally, the characteristics of its contractual flows represent substantially a “basic financing agreement”. - Fair value with changes in other comprehensive income: financial instruments held in a business model whose objective is to collect principal and interest cash flows and the sale of these assets, where fair value is a key factor in their management. Additionally, the contractual cash flow characteristics substantially represent a “basic financing agreement”. - Fair value with changes in profit or loss: financial instruments included in a business model whose objective is not obtained through the above mentioned models, where fair value is a key factor in managing of these assets, and financial instruments whose contractual cash flow characteristics do not substantially represent a “basic financing agreement”. In this section it can be enclosed the portfolios classified under “Financial assets held for trading”, “Non-trading financial assets mandatorily at fair value through profit or loss” and “Financial assets at fair value through profit or loss”. Equity instruments will be classified at fair value under IFRS9, with changes in profit or loss, unless the Group decides, for non-trading assets, to classify them at fair value with changes in other comprehensive income (irrevocably) in the initial moment. The Group has generally applied this option to the equity instruments classified as “Available-for-sale” at December 31, 2017 under IAS39. In general, the Group has applied this option in the case of equity instruments classified under "Available for Sale" at December 31, 2017 under IAS39. Until December 31, 2017, the Group applied IAS39, under which the following three categories existed that are not applicable under IFRS9 (See note 1.b): - Financial assets available-for-sale: this category includes debt instruments not classified as Held-to-maturity investments, Loans and receivables or Financial assets at fair value through profit or loss, and equity instruments issued by entities other than subsidiaries, associates and joint ventures, provided that such instruments have not been classified as Financial assets held for trading or as Financial assets designated at fair value through profit or loss. - Loans and receivables: this category includes the investment arising from ordinary lending activities, such as the cash amounts of loans drawn down and not yet repaid by customers or the deposits placed with other institutions, whatever the legal instrument, unquoted debt securities and receivables from the purchasers of goods, or the users of services, constituting part of the Group's business. - Investments held-to-maturity: this category includes debt instruments with fixed maturity and with fixed or determinable payments, for which the Group has both the intention and proven ability to hold to maturity. iii. Financial assets are classified by nature into the following items in the consolidated balance sheet: - Cash, cash balances at Central Banks and other deposits on demand: cash balances and balances receivable on demand relating to deposits with central banks and credit institutions. - Loans and advances: includes the debit balances of all credit and loans granted by the Group, other than those represented by securities, as well as finance lease receivables and other debit balances of a financial nature in favour of the Group, such as cheques drawn on credit institutions, balances receivable from clearing houses and settlement agencies for transactions on the stock exchange and organised markets, bonds given in cash, capital calls, fees and commissions receivable for financial guarantees and debit balances arising from transactions not originating in banking transactions and services, such as the collection of rentals and similar items. They are classified, on the basis of the institutional sector to which the debtor belongs, into: - Central banks: credit of any nature, including deposits and money market transactions received from the Bank of Spain or other central banks. - Credit institutions: credit of any nature, including deposits and money market transactions, in the name of credit institutions. - Customers: includes the remaining credit, including money market transactions through central counterparties. - Debt instruments: bonds and other securities that represent a debt for their issuer, that generate an interest return, and that are in the form of certificates or book entries. - Equity instruments: financial instruments issued by other entities, such as shares, which have the nature of equity instruments for the issuer, other than investments in subsidiaries, joint ventures or associates. Investment fund units are included in this item. - Derivatives: includes the fair value in favour of the Group of derivatives which do not form part of hedge accounting, including embedded derivatives separated from hybrid financial instruments. - Changes in the fair value of hedged items in portfolio hedges of interest rate risk: this item is the balancing entry for the amounts credited to the consolidated income statement in respect of the measurement of the portfolios of financial instruments which are effectively hedged against interest rate risk through fair value hedging derivatives. - Hedging derivatives: Includes the fair value in favour of the Group of derivatives, including embedded derivatives separated from hybrid financial instruments, designated as hedging instruments in hedge accounting. iv. Financial liabilities are initially classified into the various categories used for management and measurement purposes, unless they have to be presented as Liabilities associated with non-current assets held for sale or they relate to Hedging derivatives or Changes in the fair value of hedged items in portfolio hedges of interest rate risk (liability side), which are reported separately. IAS39 financial liabilities classification and measurement criteria remains substantially unchanged under IFRS9. Nevertheless, in most cases, the changes in the fair value of financial liabilities designated at fair value with changes recognised through profit or loss for the year, due to the entity credit risk, are classified under other comprehensive income. Financial liabilities are included for measurement purposes in one of the following categories: - Financial liabilities held for trading (at fair value through profit or loss): this category includes financial liabilities incurred for the purpose of generating a profit in the near term from fluctuations in their prices, financial derivatives not designated as hedging instruments, and financial liabilities arising from the outright sale of financial assets acquired under reverse repurchase agreements (“reverse repos”) or borrowed (short positions). - Financial liabilities designated at fair value through profit or loss: financial liabilities are included in this category when they provide more relevant information, either because this eliminates or significantly reduces recognition or measurement inconsistencies (accounting mismatches) that would otherwise arise from measuring assets or liabilities or recognising the gains or losses on them on different bases, or because a group of financial liabilities or financial assets and liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided on that basis to the Group’s key management personnel. Liabilities may only be included in this category on the date when they are incurred or originated. - Financial liabilities at amortised cost: financial liabilities, irrespective of their instrumentation and maturity, not included in any of the above-mentioned categories which arise from the ordinary borrowing activities carried on by financial institutions. v. Financial liabilities are classified by nature into the following items in the consolidated balance sheet: - Deposits: includes all repayable balances received in cash by the Group, other than those instrumented as marketable securities and those having the substance of subordinated liabilities (amount of the loans received, which for credit priority purposes are after common creditors), except for the debt instruments. This item also includes cash bonds and cash consignments

Santander Group

Santander Group	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about business combination [abstract]
Santander Group	3. Santander Group a) The growth of the Group in the last decades has led the Bank to also act, in practice, as a holding entity of the shares of the various companies in its Group, and its results are becoming progressively less representative of the performance and earnings of the Group. Therefore, each year the Bank determines the amount of the dividends to be distributed to its shareholders on the basis of the consolidated net profit, while maintaining the Group’s traditionally high level of capitalisation and taking into account that the transactions of the Bank and of the rest of the Group are managed on a consolidated basis (notwithstanding the allocation to each company of the related net worth effect). At the international level, the various banks and other subsidiaries, joint ventures and associates of the Group are integrated in a corporate structure comprising various holding companies which are the ultimate shareholders of the banks and subsidiaries abroad. The purpose of this structure, all of which is controlled by the Bank, is to optimise the international organisation from the strategic, economic, financial and tax standpoints, since it makes it possible to define the most appropriate units to be entrusted with acquiring, selling or holding stakes in other international entities, the most appropriate financing method for these transactions and the most appropriate means of remitting the profits obtained by the Group’s various operating units to Spain. The Appendices provide relevant data on the consolidated Group companies and on the companies accounted for using the equity method. b) Following is a summary of the main acquisitions and disposals of ownership interests in the share capital of other entities and other significant corporate transactions performed by the Group in the last three years: i. Sale of the 49% stake in Wizink Once the relevant regulatory authorizations had been obtained, on November 6, 2018 the operations related to the agreement reached with entities managed by Värde Partners, Inc (“Varde) and with WiZink Bank, S.A. (“WiZink”) communicated by the Group on March 26, 2018 by virtue of which: i. Banco Santander, S.A. sold its 49% stake in WiZink to Varde for EUR 1,043 million, with no significant impact on the Group's results and, ii. Banco Santander, S.A. and Banco Santander Totta, S.A. acquired the business of credit and debit cards marketed by Grupo Banco Popular in Spain and Portugal that WiZink had acquired in 2014 and 2016. As a result of this transaction, the Group paid a total of EUR 681 million, receiving net assets worth EUR 306 million (mainly customer loans worth EUR 315 million), with the business combination generating a goodwill of EUR 375 million, which will be managed by the businesses in Spain. With these transactions, the Group resumed Grupo Banco Popular's debit and credit card business, which improves the commercial strategy and facilitates Grupo Banco Popular's integration process. ii. Acquisition of the retail banking and private banking business of Deutsche Bank Polska S.A. On December 14, 2017 the Group announced that its subsidiary Santander Bank Polska S.A. (previously Bank Zachodni WBK S.A.) together with Banco Santander, S.A., had reached an agreement with Deutsche Bank, A.G. for the acquisition (through a carve out) of the retail and private banking business of Deutsche Bank Polska S.A., excluding the foreign currency mortgage portfolio and the CIB (Corporate & Investment Banking) business, and including the asset management company DB Securities, S.A. (Poland). In November 2018, once the regulatory authorisations had been received and approved by the general shareholders' meetings of Santander Bank Polska S.A. and Deutsche Bank Polska, S.A., the acquisition of EUR 298 million in cash and newly issued shares of Santander Bank Polska S.A. subscribed in full by Deutsche Bank, A.G. was closed. As a result of this transaction, the Group has acquired net assets worth EUR 365 million, mainly loans and deposits to customers and credit institutions amounting to EUR 4,304 million and EUR 4,025 million, respectively, and negative value adjustments amounting to 82 million euros (mainly under line "Loans"). The difference between the fair value of the net assets acquired and the transaction value resulted in a gain of EUR 67 million which was recognised under "Negative Goodwill Recognised in Income" in the Group's consolidated income statement. iii. Acquisition of Banco Popular Español, S.A.U. On June 7, 2017 (the acquisition date), as part of its growth strategy in the markets where it is present, the Group communicated the acquisition of 100% of the share capital of Banco Popular Español, S.A.U. (merged with Banco Santander, see Note 3.b)v) as a result of a competitive sale process organised in the framework of a resolution scheme adopted by the Single Resolution Board (“SRB”) and executed by the FROB, Spanish single resolution board, in accordance with Regulation (EU) 806/2014 of the European Parliament and of the Council of May 15, 2014, and Law 11/2015, of June 18, for the recovery and resolution of credit institutions and investment firms. As part of the execution of the resolution: - All the shares of Banco Popular outstanding at the closing of market on June 7, 2017 and all the shares resulting from the conversion of the regulatory capital instruments Additional Tier 1 issued by Banco Popular have been converted into undisposed reserves. - All the regulatory capital instruments Tier 2 issued by Banco Popular have been converted into newly issued shares of Banco Popular, all of which have been acquired for a total consideration of one euro by the Group. The transaction was approved by all the applicable regulatory and antitrust authorities in the territories where Banco Popular operated. In accordance with IFRS3, the Group measured the identifiable assets acquired and liabilities assumed at fair value. The detail of this fair value of the identifiable assets acquired and liabilities assumed at the business combination date was as follows: Million As of June 7, 2017 of euros Cash and balances with central banks 1,861 Financial assets available-for-sale 18,974 Deposits from credit institutions 2,971 Loans and receivables (*) 82,057 Investments 1,815 Intangible assets (*) 133 Tax assets (*) 3,945 Non-current assets held for sale (*) 6,531 Other assets 6,259 Total assets 124,546 Deposits from central banks 28,845 Deposits from credit institutions 14,094 Customer deposits 62,270 Marketable debt securities and other financial liabilities 12,919 Provisions (***) 1,816 Other liabilities 4,850 Total liabilities (**) 124,794 Net assets (248) Purchase consideration — Goodwill 248 (*) - Loans and receivables: in the estimation of their fair value, impairment have been considered for an approximate amount of EUR 3,239 million, considering, among others, the sale process carried out by the Bank. - Foreclosed assets: the valuation, considering the sale process carried out by the company, has meant a reduction in the value of EUR 3,806 million, approximately. - Intangible assets: includes value reductions amounting to approximately of EUR 2,469 million, mainly recorded under the “Intangible assets - goodwill”. - Deferred tax assets: mainly corresponds to the reduction of the value of negative tax bases and deductions for an approximate amount of EUR 1,711 million. (**) After the initial analysis and the conversion of the subordinated debt, the best estimation is there is no significant impact between fair value and previous carrying amount of the financial liabilities. (***) As a result of the resolution of Banco Popular, it includes the estimated cost of EUR 680 million relating to the potential compensation to the shareholders of Banco Popular of which EUR 535 million have been applied to the fidelity action. The Group during 2018, closed their assessment exercise of the assets acquired and liabilities assumed at fair value, without any modification with respect to what was recorded in 2017. iv. Sale agreement of Banco Popular’s real estate business In relation with Banco Popular’s real estate business, on 8 August 2017, the Group announced the agreement with a Blackstone fund for the acquisition by the fund of 51% of, and hence the assignment of control over, part of Banco Popular's real estate business (the “Business”), which comprises a portfolio of foreclosed properties, real estate companies, non-performing loans relating to the sector and other assets related to these activities owned by Banco Popular and its affiliates (including deferred tax assets allocated to specific real estate companies which are part of the transferred portfolio) registered on certain specified dates (March 31, 2017 or April 30, 2017). The agreements were entered following the European Commission’s unconditional authorization of the acquisition of Banco Popular Español, S.A.U. by Banco Santander, S.A. for the purposes of competition law. The transaction closed on March 22, 2018 following receipt of the required regulatory authorizations and other usual conditions in this type of transactions. The transaction has consisted of the creation of various companies, being the parent company Project Quasar Investments 2017, S.L., in which Banco Santander, S.A. maintains 49% of the share capital and Blackstone the remaining 51%, and to which Banco Popular and some subsidiaries has transferred the business constituted by the indicated assets, and its participation in the capital of Aliseda Real Estate Management Services, S.L. The value attributed to the contributed assets is approximately 10,000 million euros, of which approximately 70% was financed with third party bank debt. After the contribution to the vehicle by its shareholders of the necessary liquidity for the transaction of the business, the 49% stake in the capital of the vehicles was recorded in the consolidated balance sheet of the Group for EUR 1,701 million in the "Investments in joint ventures and associates - entities" section, without significant impact in the Group´s income statement. v. Merger by absorption of Banco Santander, S.A. with Banco Popular Español, S.A.U. On April 23, 2018 the boards of directors of Banco Santander, S.A. and Banco Popular Español, S.A.U. agreed to approve and sign the merger project by absorption of Banco Popular Español, S.A.U. by Banco Santander, S.A. On September 28, 2018 the merger certificate of Banco Popular Español, S.A.U. by Banco Santander, S.A. was registered in the Mercantile Registry of Cantabria. After the merger, Banco Santander, S.A. has acquired, by universal succession, all the rights and obligations of Banco Popular Español, S.A.U., including those that have been acquired from Banco Pastor, S.A.U. and Popular Banca Privada, S.A.U., by virtue of the merger of Banco Pastor, S.A.U. and Popular Banca Privada, S.A.U. with Banco Popular Español, S.A.U. that was also approved on April 23, 2018 by the respective board of directors. This transaction has no impact on the Group's income statement. vi. Agreement with Aegeon Group as partner for several insurance services On July 3, 2018, the Group announced that it had reached an agreement with the Aegon Group, pursuant to which it will be the partner in Spain for the life-insurance business and several branches of general insurance. Given such agreement, and the perimeter under which it will be materialised, are subject to various conditions including the termination of the current alliance between Banco Popular and its current partner, it is not possible to estimate when these transactions will be closed. These transactions are not expected to have a significant impact on the Group's income statement. vii. Agreement with Santander Asset Management a) Acquisition 50% SAM Investment Holdings Limited On November 16, 2016, after the agreement with Unicredit Group on July 27, 2016 to integrate Santander Asset Management, and Pioneer Investments was abandoned, the Group announced that it had reached an agreement with Warburg Pincus (“WP”) and General Atlantic (“GA”) under which Santander acquired 50% of SAM Investment Holdings Limited., at December 22, 2017. The Group disbursed a total amount of EUR 545 million and assumed financing of EUR 439 million, with the business combination generating a goodwill of EUR 1,173 million and EUR 320 million of “intangible assets - contracts and relationships with customers” identified in the purchase price allocation, without other value adjustments to net assets of the business. Likewise, the market valuation of the previous participation held did not have an impact on the Group’s income statement. Considering that the main activity of the business is asset management, the main part of its activity are recorded off balance sheet. The main net assets acquired, in addition to the aforementioned intangible assets, were net deposits in credit institutions (EUR 181 million) and net tax assets (EUR 176 million). Given their nature, the fair value of these assets and liabilities do not differ from the book value recorded. The Group has closed its assessment exercise of assets acquired and liabilities assumed at fair value during the year 2018 without modification with respect to what was recorded at the end of 2017. b) Sale participation Allfunds Bank, S.A. As part of the transaction, which consists in the acquisition of 50% of SAM Investment Holdings Limited, that was not owned by the Group, Santander, WP and GA agreed to explore different alternatives for the sale of its stake in Allfunds Bank, S.A. (“Allfunds Bank”), including a possible sale or a public offering. On March 7, 2017, the Bank announced that together with our partners in Allfunds Bank we had reached an agreement for the sale of 100% of Allfunds Bank to funds affiliated with Hellman & Friedman, a leading private equity investor, and GIC, Singapore’s sovereign wealth fund. On November 21, 2017 the Group announced the closing of the sale by the Bank and its partners of 100% of Allfunds Bank’s capital, obtaining an amount of EUR 501 million from the sale of its 25% stake in Allfunds Bank, resulting in gains net of tax of EUR 297 million, which were recognised as “Gains or losses on disposal of non-financial assets and investments, net”, within the statement of profit or loss. viii. Purchase of the shares to DDFS LLC in Santander Consumer USA Holdings Inc. (SCUSA) On July 2, 2015, the Group announced that it had reached an agreement to purchase the 9.65% ownership interest held by DDFS LLC in SCUSA. On November 15, 2017, after having agreed on some modifications to the original agreement and having obtained the required regulatory authorizations, the Group completed the acquisition of the aforementioned 9.65% of SCUSA shares for a total sum of USD 942 million (EUR 800 million), which have caused a decrease of EUR 492 million in the non-controlling interests balance and another reduction to reserves of EUR 307 million. ix. Agreement with Banque PSA Finance The Group, through its subsidiary Santander Consumer Finance, S.A., and Banque PSA Finance, the vehicle financing unit of the PSA Peugeot Citroën Group, entered into an agreement in 2014 for the transaction of the vehicle and insurance financing business in twelve European countries. Pursuant to the terms of the agreement, the Group will finance this business, under certain circumstances and conditions, from the date on which the transaction is completed. In January 2015 the related regulatory authorisations to commence activities in France and the United Kingdom were obtained and, accordingly, on February 2 and 3, 2015 the Group acquired 50% of Société Financière de Banque – SOFIB (actually PSA Banque France) and PSA Finance UK Limited for EUR 462 million and EUR 148 million, respectively. On May 1, 2015, PSA Insurance Europe Limited and PSA Life Insurance Europe Limited (both insurance companies with registered office in Malta) were incorporated, in which the Group contributed 50% of the share capital, amounting to EUR 23 million. On August 3, the Group acquired a full ownership interest in PSA Gestão - Comércio E Aluguer de Veiculos, S.A. (actually Santander Consumer Services, S.A. and a company with registered office in Portugal) and the loan portfolio of the Portuguese branch of Banque PSA Finance for EUR 10 million and EUR 25 million, respectively. On October 1,, PSA Financial Services Spain, E.F.C., S.A. (a company with registered office in Spain) was incorporated, in which the Group contributed EUR 181 million (50% of the share capital). (This company owns the 100% of the share capital of PSA Finanse Suisse which is domiciled in Switzerland). During 2016, the agreement obtained the necessary authorizations, by the regulators, to start activities in the rest of the countries covered by the framework agreement (Italy, the Netherlands, Austria, Belgium, Germany, Brazil and Poland). The Group’s disbursement during 2016 amounted to EUR 464 million to reach a 50% stake in the capital of each of the structures created in each geography, with the exception of PSA finance Arrendamento Mercantil SA (actually Distribuidora de Títulos e Valores Mobiliários S.A.) where 100% of capital is acquired. During 2016 the new businesses acquired have contributed EUR 79 million to the Group’s profit. Had the business combination taken place on January 1, 2016, the profit contributed to the Group in 2016 would have been approximately EUR 118 million. x. Metrovacesa agreement - Merlin On June 21, 2016, Banco Santander hereby reached an agreement with Merlin Properties, SOCIMI, S.A., together with the other shareholders of Metrovacesa, S.A., for the integration in Merlin group, following the total spin-off of Metrovacesa, S.A., of Metrovacesa, S.A. property rental asset business in Merlin Properties, SOCIMI, S.A. and Metrovacesa, S.A. residential rental business in Metrovacesa, S.A. current subsidiary, Testa Residencial SOCIMI, S.A. (before, Testa Residencial, S.L.) The other assets of Metrovacesa, S.A. not integrated in Merlin group as a result of the integration, consisting of a residual group of land assets for development and subsequent lease, will be transferred to a newly created company wholly owned by the current shareholders of Metrovacesa, S.A. On September 15, 2016, the general meeting of shareholders of Merlin Properties, SOCIMI, S.A. and Metrovacesa, S.A. took place and the transaction was approved. Subsequently, on October 20, 2016, the deed of total division of Metrovacesa, S.A. was granted in favour of the mentioned companies, and such deed was filed in the Commercial Register on October 26, 2016. As a result of the integration, Santander Group has increased its participation to 21.95% of the equity capital of Merlin Properties, SOCIMI, S.A., 46.21% of direct participation in the equity capital of Testa Residential, SOCIMI, S.A. and 70.27% in Metrovacesa Promoción y Arrendamiento, S.A. The main impacts on the consolidated Group’s balance of this division have been; decrease of EUR 3,800 million in real estate investment (see Note 16), decrease of EUR 621 million under minority interests (see Note 28) and an increase in the heading of investments in joint ventures and associates participation of the businesses received in the associates Merlín Properties and Testa Residencial, of EUR:1,168 and 307 million, respectively. (See Note 13.a). c) According to current Spanish regulation, Santander has entities in 4 off-shore territories: Jersey, Guernsey, Isle of Man and Cayman Islands. These four jurisdictions comply with OECD standards in terms of transparency and exchange of information for tax purposes. Santander have 4 subsidiaries and 4 operative branches in off-shore territories: these are governed by the tax regimes of those territories. Santander also has 4 subsidiaries in off-shore territories, of which 3 are tax resident in the UK and 1 tax resident in Spain, to whose tax regimes they are subjected. The Group has no presence in any of the 5 territories included in the European Union’s current blacklist according to the last update of November 2018, neither in non-cooperative territories for tax purposes as defined by the OECD in July 2017. I) Subsidiaries in off-shore territories. At the reporting date, the Group has 4 subsidiaries resident in off-shore territories, two in Jersey, Whitewick Limited (inactive company) and Abbey National International Limited, and one in the Isle of Man, ALIL Services Limited. These subsidiaries contributed a profit of approximately EUR 0.2 million to the Group’s consolidated profit in 2018. In addition, during 2018, a new company domiciled in Jersey was created, named Santander International Limited, subsidiary of Santander UK Group Holdings plc, in order to make possible the separation of business imposed by the banking reform in the United Kingdom ("Ring-fence") that came into force on January 1, 2019, although this company will be liquidated in the near future. II) Off-shore branches. Also, the Group has 4 operative off-shore branches: 2 in the Cayman Islands, 1 in the Isle of Man and 1 in Jersey. These branches report to, consolidate their balance sheets and income statements and are taxed with, their respective foreign headquarters (Cayman Islands) or in the territories where they are located (Jersey and Isle of Man). Additionally, as a result of complying with the Ring-Fence regulation in the UK mentioned in the previous point, there is another branch in Jersey of Santander UK plc, which is currently not operative and will be closed in early 2019. The aforementioned entities have a total of 144 employees as of December 2018. III) Subsidiaries in off-shore territories that are tax resident in the UK and Spain. As indicated, the Group also has 4 subsidiaries constituted in off-shore territories that are not considered to be off-shore entities, since 3 of them are tax residents in the UK and, therefore, subject to UK tax law during the period and operate exclusively from the UK (one of these subsidiaries is expected to be liquidated in 2019). Also, since April 2018, the fourth subsidiary has ceased to be a resident for tax purposes in the UK to become a tax resident in Spain. IV) Other off-shore investments. The Group manages from Brazil a segregated portfolio company called Santander Brazil Global Investment Fund SPC in the Cayman Islands, and manages from the United Kingdom a protected cell company in Guernsey called Guaranteed Investment Products 1 PCC Limited. The Group also has, directly or indirectly, few financial investments located in tax havens including Olivant Limited in Guernsey, entity whose liquidation or sale is expected to be carried out soon. V) OECD. The Group has no presence in non-cooperative territories for tax purposes as defined by the OECD in July 2017. In this sense it should be noted that Jersey, Guernsey, Isle of Man and Cayman Islands, comply with OECD standards in terms of transparency and exchange of information for tax purposes. VI) The European Union. On December 5, 2017, the European Commission published some lists of non-cooperative jurisdictions for tax purposes (where there is no member state of the European Union): blacklist, gray list and territories which have received a grace period. Throughout 2018, the European Commission has updated these lists. Currently the EU blacklist is composed of 5 jurisdictions in which the Group has no presence. These jurisdictions have not committed, or have not done it sufficiently, to comply with a series of measures in relation to fiscal transparency, corporate tax, or the respect of the principles of the OECD to avoid the erosion of the tax bases and the transfer of benefits (better known by the English term anti-BEPS). On the contrary there are 63 jurisdictions in the gray list that have committed, in a way considered sufficient, to correct their legal frameworks to align them with international standards and whose implementation will be monitored by the EU. Among others, this list includes the 4 jurisdictions in which the Group has presence and are off-shore territories in accordance with current Spanish legislation (Jersey, Guernsey, Isle of Man and Cayman Islands). Additionally, Hong Kong, Bahamas, Switzerland, Uruguay and Panama are included in the gray list, although according to the current Spanish legislation are not off-shore territories and, as disclosed before, have committed to modify their legislation, as for example implementing the Common Reporting Standards (CRS), developed by the OECD, as an automatic information exchange system between jurisdictions. The Group has 2 subsidiaries and 1 branch located in Hong Kong, 6 subsidiaries (1 of them in liquidation and 1 tax resident in the USA) and 2 branches in Bahamas (1 of them in process of closure), 6 subsidiaries in Switzerland, 12 subsidiaries in Uruguay (6 of which are in liquidation) and 1 subsidiary in Panama with reduced activity that has already received authorization from the Superintendency of Banks of Panama for its voluntary liquidation. At present, Spain has in force Double Taxation Agreements with exchange of information clause with Hong Kong, Switzerland, Uruguay and Panama, as well as Tax Information Exchange Agreement with Bahamas. VII) Impact of forthcoming changes to Spain’s tax law. On October 23, 2018, the Spanish Government published the Draft Law on measures to prevent and fight against tax fraud, which expands the concept of tax haven, including not only the countries and territories that were already considered as such, but also other tax regimes that are determined as harmful in a regulatory manner. In addition, new criteria are regulated for inclusion in the list of tax havens. As long as the list of countries and territories and harmful tax regimes that are considered tax havens are not determined by regulation, the former list of tax havens established in Royal Decree 1080/1991, of 5th July, will continue in force. The Group has established appropriate procedures and controls (risk management, supervision, verification and review plans and periodic reports) to prevent reputational, tax and legal risk at these entities. Also, the Group has continued to implement its policy of reducing the number of these off-shore units. The financial statements of the Group’s off-shore units are audited by PwC (PricewaterhouseCoopers) member firms in 2018 and 2017.

Distribution of the Bank's prof

Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share	12 Months Ended
	Dec. 31, 2018
Shareholder remuneration system and earnings per share
Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share	4. Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share a) Distribution of the Bank's profit and shareholder remuneration scheme The distribution of the Bank's net profit for 2018 that the board of directors will propose for approval by the shareholders at the annual general meeting is as follows: Million of euros First and third interim dividends and final dividend 3,160 Acquisition, with a waiver of exercise, of bonus share rights from the shareholders which, under the Santander Dividendo Elección scrip dividend scheme, opted to receive in cash remuneration equivalent to the second interim dividend 132 3,292 Of which: Approved at December 31, 2018 (*) 2,237 Final dividend 1,055 To voluntary reserves 9 Net profit for the year 3,301 (*) Recognised under Shareholders' equity – Interim dividends. In addition to the EUR 3,292 million indicated above, EUR 432 million in shares were allocated to the remuneration of shareholders under the shareholder remuneration scheme (Santander Dividendo Elección) approved by the shareholders at the annual general meeting held on 23 March 2018, whereby the Bank offered shareholders the possibility to opt to receive an amount equivalent to the second interim dividend out of 2018 profit in cash or new shares. A remuneration of EUR 0.23 per share, charged to the 2018 annual period, will be proposed by the board of directors to the shareholders at the annual general meeting. b) i. Basic earnings per share are calculated by dividing the net profit attributable to the Group (adjusted by the after-tax amount of the remuneration of contingently convertible preference shares recognised in equity - See Note 23) and the capital perpetual preference shares, if applicable, by the weighted average number of ordinary shares outstanding during the year, excluding the average number of treasury shares held in the year. Accordingly: 2018 2017 2016 Profit attributable to the parent (million of euros) 7,810 6,619 6,204 Remuneration of contingently convertible preference shares (CCP) (million of euros) (Note 23) (560) (395) (334) 7,250 6,224 5,870 Of which: Profit or Loss from discontinued operations (non controlling interest net) (million of euros) — — — Profit or Loss from continuing operations (net of non-controlling interests and CCP) (million of euros) 7,250 6,224 5,870 Weighted average number of shares outstanding 16,150,090,739 15,394,458,789 14,656,359,963 Adjusted number of shares 16,150,090,739 15,394,458,789 14,656,359,963 Basic earnings per share (euros) 0.449 0.404 0.401 Basic earnings per share from discontinued operations (euros) Basic earnings per share from continuing operations (euros) 0.449 0.404 0.401 ii. Diluted earnings per share Diluted earnings per share are calculated by dividing the net profit attributable to the Group (adjusted by the after-tax amount of the remuneration of contingently convertible preference shares recognised in equity - See Note 23) and the capital perpetual preference shares, if applicable, by the weighted average number of ordinary shares outstanding during the year, excluding the average number of treasury shares and adjusted for all the dilutive effects inherent to potential ordinary shares (share options, and convertible debt instruments). Accordingly, diluted earnings per share were determined as follows: 2018 2017 2016 Profit attributable to the parent (million of euros) 7,810 6,619 6,204 Remuneration of contingently convertible preference shares (CCP) (million of euros) (Note 23) (560) (395) (334) 7,250 6,224 5,870 Of which: Profit (Loss) from discontinued operations (net of non-controlling interests) (million of euros) — — Profit from continuing operations (net of non-controlling interests and CCP) (million of euros) 7,250 6,224 5,870 Weighted average number of shares outstanding 16,150,090,739 15,394,458,789 14,656,359,963 Dilutive effect of options/rights on shares 42,873,078 50,962,887 45,754,981 Adjusted number of shares 16,192,963,817 15,445,421,676 14,702,114,944 Diluted earnings per share (euros) 0.448 0.403 0.399 Diluted earnings per share from discontinued operations (euros) 0.000 0.000 Diluted earnings per share from continuing operations (euros) 0.448 0.403 0.399 The capital increase in 2017 (See Note 31.a) had an impact on the basic and diluted earnings per share of the previous years due to the alteration in the number of shares outstanding. Due to this fact, the information relating to the 2016 period has been recasted according to the applicable legislation.

Remuneration and other benefits

Remuneration and other benefits paid to the Bank's directors and senior managers	12 Months Ended
	Dec. 31, 2018
Related party transactions key personnel
Remuneration and other benefits paid to the Bank's directors and senior managers	5. Remuneration and other benefits paid to the Bank’s directors and senior managers The following section contains qualitative and quantitative disclosures on the remuneration paid to the members of the Board of Directors -both executive and non-executive directors- and senior managers for 2018 and 2017: a) i. Bylaw-stipulated emoluments The annual General Meeting held on March 22, 2013 approved an amendment to the Bylaws, whereby the remuneration of directors in their capacity as board members became an annual fixed amount determined by the annual General Meeting. This amount shall remain in effect unless the shareholders resolve to change it at a general meeting. However, the Board of Directors may elect to reduce the amount in any years in which it deems such action justified. The remuneration established by the Annual General Meeting for the years 2018 and 2017, was EUR 6 million, with two components: (a) an annual emolument and (b) attendance fees. The specific amount payable for the above-mentioned items to each of the directors is determined by the Board of Directors. For such purpose, it takes into consideration the positions held by each director on the Board, their membership of the Board and the board committees and their attendance of the meetings thereof, and any other objective circumstances considered by the Board. The total bylaw-stipulated emoluments earned by the Directors in 2018 amounted to EUR 4.6 million (EUR 4.7 million in 2017). Annual emolument The amounts received individually by the directors in 2018 and 2017 based on the positions held by them on the board and their membership of the Board committees were as follows: Euros 2018 2017 Members of the board of directors 90,000 87,500 Members of the executive committee 170,000 170,000 Members of the audit committee 40,000 40,000 Members of the appointments committee 25,000 25,000 Members of the remuneration committee 25,000 25,000 Members of the risk supervision, regulation and compliance oversight committee 40,000 40,000 Members of the responsible banking, sustainability and culture committee 15,000 — Chairman of the audit committee 70,000 50,000 Chairman of the appointments committee 50,000 50,000 Chairman of the remuneration committee 50,000 50,000 Chairman of the risk, regulation and compliance oversight committee 70,000 50,000 Chairman of the responsible banking, sustainability and culture committee 50,000 — Lead director (*) 110,000 110,000 Non-executive deputy chairman 30,000 30,000 (*) Mr Bruce Carnegie-Brown, for duties performed as part of the board and board committees, specifically as chairman of the appointments and remuneration committees and as lead director, and for the time and dedication required to perform these duties, has been allocated minimum total annual remuneration of EUR 700,000 since 2015, including the aforementioned annual allowances and attendance fees corresponding to him. Attendance fees The directors receive fees for attending board and committee meetings, excluding executive committee meetings, since no attendance fees are received for this committee. By resolution of the board of directors, at the proposal of the remuneration committee, the fees for attending board and committee meetings - excluding, as aforementioned, executive committee meetings - were as follows: Euros Meeting attendance fees 2018 2017 Board of directors 2,600 2,600 Audit committee and risk supervision, regulation and compliance oversight committee 1,700 1,700 Other committees (except the executive committee) 1,500 1,500 ii. Salaries The executive directors receive salaries. In accordance with the policy approved by the annual general meeting, salaries are composed of a fixed annual remuneration and a variable one consisting of a unique incentive, which is based on a deferred variable remuneration linked to multi-year objectives, which establishes the following payment scheme: · 40% of the variable remuneration amount, determined at year-end on the basis of the achievement of the established objectives, is paid immediately. · The remaining 60% is deferred over five years, as the case may be, in five portions provided that the conditions of permanence of the Group and non-concurrence of the malus clauses are met, taking into account the following accrual scheme. · The accrual of the first and second portion (payment in 2020 and 2021) is not subject to the long-term objectives. · The accrual of the third, fourth, and fifth portion (payment in 2022, 2023 and 2024), is linked to certain objectives related to the period 2018-2020 and the metrics and scales associated with these objectives. The fulfilment of the objective determines the percentage to be paid of the deferred amount in these three annuities, being the maximum amount determined at the end of the 2018 when the total variable remuneration is approved. · In accordance with current remuneration policies, the amounts already paid will be settled to a possible recovery (clawback) by the Bank during the period set out in the policy in force each moment. The immediate payment (or short-term) as well as each deferred payment, whether subject or not to long-term, goals will be settled 50% in cash and the remaining 50% in Santander shares. iii. The detail, by Bank director, of the short-term (immediate) and deferred (not subject to long-term goals) remuneration for 2018 and 2017 is provided below: Thousand of euros 2018 2017 Bylaw-stipulated emoluments Short-term and deferred (not subject to long-term goals) salaries of Annual emolument executive directors Risk Responsible regulation and banking Attendance Variable – compliance sustainability fees immediate payment Deferred variable Other Executive Audit Appointments Remuneration oversight and culture and In In In In Pension Remuneration Directors Board committee committee committee committee committee committee commissions Fixed cash shares cash shares Total contribution (6) Total Total Ms Ana Botín-Sanz de Sautuola y O’Shea 90 170 — — — — 8 39 3,176 1,480 1,480 888 888 7,912 1,234 1,030 10,483 10,582 Mr José Antonio Álvarez Álvarez 90 170 — — — — — 34 2,541 989 989 593 593 5,705 1,050 1,596 8,645 8,893 Mr Rodrigo Echenique Gordillo 90 170 — — — — — 33 1,800 785 785 471 471 4,312 — 225 4,830 4,281 Mr Guillermo de la Dehesa Romero 120 170 — 25 25 20 — 81 — — — — — — — — 441 473 Mr Bruce Carnegie-Brown 383 170 — 25 25 40 — 89 — — — — — — — — 732 731 Mr Ignacio Benjumea Cabeza de Vaca 90 170 — 13 25 40 8 86 — — — — — — — 81 513 550 Mr Francisco Javier Botín-Sanz de Sautuola y O’Shea (1) 90 — — — — — — 31 — — — — — — — — 121 124 Ms Sol Daurella Comadrán 90 — — 25 25 — 8 67 — — — — — — — — 215 207 Mr Carlos Fernández González 90 — 40 25 25 — — 86 — — — — — — — — 266 285 Ms Esther Giménez-Salinas i Colomer 90 — — — — 40 8 58 — — — — — — — — 196 162 Ms Belén Romana García 160 85 40 — — 40 8 81 — — — — — — — — 414 297 Mr Juan Miguel Villar Mir 90 — — — — — — 18 — — — — — — — — 108 170 Ms Homaira Akbari 90 — 40 — — — 8 61 — — — — — — — — 199 159 Mr Ramiro Mato García Ansorena (2) 115 170 40 — — 40 8 77 — — — — — — — — 450 36 Mr Alvaro Cardoso de Souza (3) 85 — — — — 27 5 31 — — — — — — — — 148 — Mr Matías Rodríguez Inciarte (4) — — — — — — — — — — — — — — — — — 4,266 Ms Isabel Tocino Biscarolasaga (5) — — — — — — — — — — — — — — — — — 418 Total 2018 1,763 1,275 160 113 125 247 61 872 7,517 3,254 3,254 1,952 1,952 17,929 2,284 2,932 27,761 — Total 2017 1,675 1,345 160 125 123 280 — 973 7,568 3,698 3,698 2,219 2,219 19,402 5,164 2,387 — 31,634 (1) All the amounts received were repaid to the Fundación Marcelino Botín. (2) Director since 28 November 2017 (3) Director since 23 March 2018 (4) Ceased to be a member of the Board on 28 November, 2017. This table shows the remuneration information until his ceased as a member of the board. The remuneration information for his performance as executive vice president since November 28, 2017 is included in the corresponding section. (5) Ceased to be a member of the board on 28 November, 2017. (6) Includes committee chairmanship and other roles emoluments. (7) Includes, inter alia, the life and medical insurance costs borne by the Group relating to Bank directors as well as a fixed supplement approved as part of the benefit systems transformation of the Executive Directors Ms Ana Botín and Mr José Antonio Álvarez Following is the detail, by executive director, of the linked to multiannual objectives salaries at their fair value, which will only be received if the conditions of continued service, non-applicability of “ malus ” clauses and, full achievement of the objectives established (or, as the case may be, of the minimum thresholds thereof, with the consequent reduction of the agreed-upon amount in the end of the year) in the terms described in Note 47. Thousand of euros 2018 2017 Variable subject to Long-term objectives(2) In cash In shares Total Total (2) Ms. Ana Botín-Sanz de Sautuola y O’Shea 932 932 1,864 1,726 Mr. José Antonio Álvarez Álvarez 623 623 1,246 1,154 Mr. Rodrigo Echenique Gordillo 495 495 990 900 Mr. Matías Rodríguez Inciarte(1) — — — 880 Total 2,050 2,050 4,100 4,660 (1) Ceased to be a member of the board on November 28, 2017. The remuneration information for his performance as executive vice president is included in the corresponding section. (2) Corresponds with the fair value of the maximum amount they are entitled to in a total of 3 years: 2022, 2023 and 2024, subject to conditions of continued service, with the exceptions provided, and to the non-applicability of “malus” clauses and achievement of the objectives established. The fair value has been determined at the grant date based on the valuation report of an independent expert, Willis Towers Watson. According to the design of the plan for 2018 and the levels of achievement of similar plans in comparable entities, the expert concludes that the reasonable range for estimating the initial achievement ratio is around 60% - 80%. It has been considered that the fair value is 70% of the maximum (see Note 47). Note 5.e) below includes disclosures on the shares delivered by virtue of the deferred remuneration schemes in place in previous years the conditions for delivery which were met in the corresponding years, and on the maximum number of shares receivable in future years in connection with the aforementioned 2018 and 2017 variable remuneration plans. b) Remuneration of the Board members as representatives of the Bank By resolution of the executive committee, all the remuneration received by the Bank’s directors who represent the Bank on the Boards of Directors of listed companies in which the Bank has a stake, paid by those companies and relating to appointments made on or after March 18, 2002 accrues to the Group. In 2018 and 2017 the Bank’s directors did not receive any remuneration in respect of these representative duties. Mr. Ma tías Rodríg uez Inciarte received EUR 42 thousand as non-executive director of U.C.I., S.A. in 2017. c) The executive directors other than Mr Rodrigo Echenique participate in the defined benefit system created in 2012, which covers the contingencies of retirement, disability and death. The Bank makes annual contributions to the benefit plans of its executive directors. In 2012, the contracts of the executive directors (and the other members of the Bank’s senior management) with defined benefit pension commitments were amended to transform them into a defined contribution system. The new system gives executive directors the right to receive benefits upon retirement, regardless of whether or not they are active at the Bank at such time, based on contributions to the system, and replaced their previous right to receive a pension supplement in the event of retirement 1 . In the event of pre-retirement and up until the retirement date, Ms Ana Botín and Mr José Antonio Álvarez have the right to receive an annual allotment. The initial balance for each of the executive directors in the new defined benefits system corresponded to the market value of the assets from which the provisions corresponding to the respective accrued obligations had materialised on the date on which the old pension commitments were transferred into the new benefits system 2 . Since 2013, the Bank has made annual contributions to the benefits system in favour of executive directors and senior executives, in proportion to their respective pensionable bases, until they leave the Group or until their retirement within the Group, death, or disability (including, if applicable, during pre-retirement). No contributions will be made with respect to executive directors or senior executives who exercised the option to receive their pension rights as capital prior to the transformation of the defined benefits pension commitments into the current defined forecast contribution system as set out in footnote 2 below. Mr Rodrigo Echenique’s contract does not provide for any charge to Banco Santander regarding benefits, without prejudice to the pension rights to which Mr Echenique was entitled prior to his appointment as executive director. The benefit plan is outsourced to Santander Seguros y Reaseguros, Compañía Aseguradora, S.A., and the economic rights of the foregoing directors under this plan belong to them regardless of whether or not they are active at the Bank at the time of their retirement, death or disability. The contracts of these directors do not provide for any severance payment in the event of termination other than as may be required by law. 1 As provided in the contracts of the executive directors prior to 2012, Mr Matías Rodríguez Inciarte exercised the option to receive accrued pensions (or similar amounts) in the form of capital, i.e., in a lump sum, which means that he ceased to accrue pensions from such time, with a fixed capital amount to be received, which shall be updated at the agreed interest rate. 2 In the case of Mr Matías Rodríguez Inciarte, the initial balance corresponded to the amount that was set when, as described above, he exercised the option to receive a lump sum, and includes the interest accrued on this amount from that date. In accordance with the provisions of the remuneration regulations, contributions made that are calculated on variable remuneration are subject to the discretionary pension benefits regime. Under this regime, these contributions are subject to malus clauses and clawback according to the policy in force at any time and during the same period in which the variable remuneration is deferred. Likewise, they must be invested in Bank shares for a period of five years from the date of the termination of executive directors in the Group, whether or not as a result of retirement. After that period, the amount invested in shares will be invested together with the remainder of the accumulated balance of the executive director, or will be paid to him or her beneficiaries had there been any contingency covered by the forecasting system. Until March 2018, the system also included a supplementary benefits scheme for cases of death (death of spouse and death of parent) and permanent disability of serving directors envisaged in the contracts of Ms Ana Botín and Mr José Antonio Álvarez. This benefit gave the widow/widower and any children under the age of 25 in the event of death, or the director in case of disability, the right to a pension supplemental to the pension they would have been entitled to receive from social security up to an annual maximum amount equal to their respective pensionable bases, as indicated above in connection with pre-retirement (in Mr Álvarez’s case, referring to his fixed remuneration as chief executive officer), with certain deductions. As per the director´s remuneration policy approved at the March 23, 2018 general shareholder´s meeting, in 2018 the system has been changed with a focus on: · Aligning the annual contributions with practices of comparable institutions. · Reducing future liabilities by eliminating the supplementary benefits scheme in the event of death (death of spouse or parent) and permanent disability of serving directors. · No increase in total costs for the Bank. The changes to the system in 2018 are the following: · Fixed and variable pension contributions have been reduced to 22% of the respective pensionable bases. The gross annual salaries and the benchmark variable remuneration have been increased in the corresponding amount with no increase in total costs for the Bank. · The death and disability supplementary benefits have been eliminated since April 1, 2018. A fixed remuneration supplement (included in other remunerations in section a.iii in this note) was implemented on the same date. · The total amount insured for life and accident insurance has been increased. The provisions recognised in 2018 and 2017 for retirement pensions and supplementary benefits (surviving spouse and child benefits, and permanent disability) were as follows: Thousand of euros 2018 2017 Ms Ana Botín-Sanz de Sautuola y O’Shea 1,234 2,707 Mr José Antonio Álvarez Álvarez 1,050 2,456 2,284 5,163 Following is a detail of the balances relating to each of the executive directors under the welfare system at December 31, 2018 and 2017: Thousand of euros 2018 2017 Ms Ana Botín-Sanz de Sautuola y O’Shea (1) 46,093 45,798 Mr José Antonio Álvarez Álvarez 16,630 16,151 Mr Rodrigo Echenique Gordillo (2) 13,614 13,957 Mr Matías Rodríguez Inciarte (3) — — 76,337 75,906 (1) Includes the amounts relating to the period of provision of services at Banesto, externalised with another insurance company. (2) Executive director since January 16, 2015 Mr. Rodrigo Echenique Gordillo doesn´t participate in the pension system and the right to the bank to make contributions in its favour in this regard. The amount at December 31, 2018 and 2017, corresponds to him prior to his appointment as executive director in January 2015. (3) Ceased to be a member of the Board on November 28, 2017, retained their pension rights as of December 31,, 2017 amounted to EUR 48,750 thousand. The payments made during 2018 to the members of the Board entitled to post-employment benefits amount to EUR 0.9 million (EUR 0.9 million in 2017). d) Insurance The Group has taken out life insurance policies for the Bank’s directors, who will be entitled to receive benefits if they are declared disabled; in the event of death, the benefits will be payable to their heirs. The premiums paid by the Group are included in the Other remuneration column of the table shown in Note 5.a.iii above. Also, the following table provides information on the sums insured for the Bank’s executive directors: Insured capital (Thousand of euros) 2018 2017 Ms. Ana Botín-Sanz de Sautuola y O’Shea 22,710 7,500 Mr. José Antonio Álvarez Álvarez 19,694 6,000 Mr. Rodrigo Echenique Gordillo 5,400 4,500 Mr. Matías Rodríguez Inciarte (1) — — 47,804 18,000 (1) Ceased to be member of the board on November 28, 2017. The insured capital at December 31, 2017 amounted to EUR 5,131 thousand. The insured capital has changed for in 2018 as Ms Ana Botín and Mr José Antonio Alvarez as part of the pension transformation set out in Note 5.c) above, that has encompassed the elimination of the supplementary benefits and the increase of the life insurance annuities. During years 2018 and 2017, the Group has disbursed a total amount of EUR 10.1 and 10.5 million, respectively, for the payment of civil-liability insurance premiums. These premiums correspond to several civil-liability insurance policies that hedge, among others, directors, senior executives and other managers and employees of the Group and the Bank itself as well as its subsidiaries, in light of certain types of potential claims, for which it is not possible to disaggregate or individualize the amount that correspond to the directors and executives. At December 31, 2018 and 2017, there were no obligations in this connection to other directors. e) Deferred variable remuneration systems The following information relates to the maximum number of shares to which the executive directors are entitled at the beginning and end of 2018 and 2017 due to their participation in the deferred variable remuneration systems, which instrumented a portion of their variable remuneration relating to 2018 and prior years, as well as on the deliveries, whether shares or cash, made to them in 2018 and 2017 where the conditions for the receipt thereof had been met (see Note 47): i) Deferred conditional variable remuneration plan From 2011 to 2015, the bonuses of executive directors and certain executives (including senior management) and employees who assume risk, who perform control functions or receive an overall remuneration that puts them on the same remuneration level as senior executives and employees who assume risk (all of whom are referred to as identified staff) have been approved by the Board of Directors and instrumented, respectively, through various cycles of the deferred conditional variable remuneration plan. Application of these cycles, insofar as they entail the delivery of shares to the plan beneficiaries, was authorized by the related Annual General Meetings. The purpose of these plans is to defer a portion of the bonus of the plan beneficiaries (60% in the case of executive directors) over a period of five years (three years for the plans approved up to 2014) for it to be paid, where appropriate, in cash and in Santander shares; the other portion of the bonus is also to be paid in cash and Santander shares, upon commencement of the cycles, in accordance with the rules set forth below. In addition to the requirement that the beneficiary remains in Santander Group’s employ, the accrual of the deferred remuneration is conditional upon none of the following circumstances existing -in the opinion of the Board of Directors following a proposal of the remuneration committee- in relation to the corresponding year in the period prior to each of the deliveries: (i) poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group’s consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) significant changes in the Group’s economic capital or its risk profile. All the foregoing shall in each case be governed by the rules of the relevant plan cycle. On each delivery, the beneficiaries will be paid an amount in cash equal to the dividends paid for the amount deferred in shares and the interest on the amount deferred in cash. If the Santander Dividendo Elección scrip dividend scheme is applied, payment will based on the price offered by the Bank for the bonus share rights corresponding to those shares. The maximum number of shares to be delivered is calculated taking into account the daily volume-weighted average prices for the 15 trading sessions prior to the date on which the Board of Directors approves the bonus for the Bank’s Executive Directors for each year. This plan and the Performance Shares (ILP) plan described below have been integrated for the executive directors and other senior managers in the deferred variable compensation plan linked to multiannual objectives, in the terms approved by the General Meeting of Shareholders held on March 18, 2016. ii) Performance shares plans (ILP) The annual general meeting held on March 27, 2015 approved the second cycle of the performance shares plan. The accrual of this long-term incentive plan (LTI) and its amount are conditional on the performance of certain metrics of Banco Santander between 2015 and 2017, as well as compliance with the remaining conditions of the plan until the end of the accrual period (December 31, 2018). The maximum benchmark LTI in number of shares for executive directors was set by the board at the end of 2015. At year-end 2018, the corresponding amounts to be received by each exclusive director in relation to LTI (the accrued LTI amount) was established taking into account the performance of the following indicators: (1) ranking of Santander´s earning per share growth for the 2015-2017 period compared to a peer group of 17 credit institutions; (2) ROTE in 2017; (3) number of principal markets in which Santander is in the Top 3 of the best banks to work for in 2017; (4) number of principal markets in which Santander is in the Top 3 of the best banks on the customer satisfaction index in 2017; (5) retail loyal clients at December 31, 2017; and (6) SME and corporate loyal clients at December 31, 2017. The overall compliance of the plan was assessed by the Board at the 65.67%. As a result of the aforementioned process and following a proposal by the remuneration committee, the board of directors approved the following number of shares to be paid in 2019: Number of shares Approved maximum LTI Final number amount (1) Ratio of shares Ms Ana Botín-Sanz de Sautuola y O’Shea 187,070 % 122,849 Mr José Antonio Álvarez Álvarez 126,279 % 82,927 Mr Rodrigo Echenique Gordillo 93,540 % 61,428 Total 406,889 267,204 (1) 91.50% of the maximum established benchmark approved at the AGM on March 27, 2015. With regards to the ILP of 2014 (see Note 47), in both 2017 and 2018, the position achieved in the Total Return for the Shareholders has not been such that determines the accrual of the second and third thirds. Therefore, the plan has expired. iii) Deferred variable compensation plan linked to multiannual objectives In 2016, with the aim of simplifying the remuneration structure, improving risk adjustment before and increasing the incidence of long-term objectives, the bonus plan (deferred and conditioned variable compensation plan) and ILP were replaced by one single plan, the deferred multiyear objectives variable remuneration plan. The variable remuneration of executive directors and certain executives (including senior management) corresponding to 2018 has been approved by the Board of Directors and implemented through the third cycle of the deferred variable remuneration plan linked to multi-year objectives. The application of the plan, thus far as it entails the delivery of shares to the beneficiaries, was authorized by the annual General Meeting of Shareholders. As indicated in section a.ii of this Note, 60% of the variable remuneration amount is deferred for five years (three years for certain beneficiaries, not including executive directors), for their payment, where appropriate by fifth parties provided that the conditions of permanence in the group and non-concurrence of the clauses malus are met, according to the following accrual scheme: · The accrual of the first and second parts (instalments in 2020 and 2021) is not subject to the fulfilment of long-term objectives. · The accrual of the third, fourth and fifth parts is linked to the fulfilment of certain objectives related to the period 2018‑2020 and the metrics and scales associated with those objectives. These objectives are: o the growth of consolidated earnings per share in 2020 compared to 2017; o the relative performance of the Bank’s total shareholder return (RTA) in the period 2018‑2020 in relation to the weighted RTAs of a reference group of 17 credit institutions; o compliance with the fully loaded ordinary level 1 capital objective for the year 2020; Compliance with the above objectives determines the percentage to be applied to the deferred amount in these three annuities, the maximum being the amount determined at the end of the year 2018 when the total variable remuneration is approved. Both the immediate (short-term) and each of the deferred (long-term and conditioned) portions are paid 50% in cash and the remaining 50% in Santander shares. The accrual of deferred amounts (whether or not subject to performance measures) is conditioned, in addition to the permanence of the beneficiary in the Group, to the fact that during the period prior to each of the deliveries, none of the circumstances giving rise to the malus clause as set out in the Group’s remuneration policy in its chapter related to malus and clawback. Likewise, the already paid amounts of the incentive will be subject to its possible recovery (clawback) by the Bank in the cases and during the term foreseen in said policy, always in the terms and conditions that are foreseen in it. The application of malus and clawback is activated in cases in which there is poor financial performance of the entity as a whole or of a specific division or area of the entity or of the exposures generated by the personnel, and at least the following factors must be considered: (i) Significant failures in risk management committed by the entity, or by a business unit or risk control. (ii) The increase suffered by the entity or by a business unit of its capital needs, not foreseen at the time of generation of the exposures. (iii) Regulatory sanctions or judicial sentences from events that could be attributable to the unit or the personnel responsible for those. Also, the breach of internal codes of conduct of the entity. (iv) Irregular conduct, whether individual or collective. The negative effects derived from the marketing of inappropriate products and the responsibilities of the people or bodies that made those decisions will be specially considered. The maximum number of shares to be delivered is calculated by taking into account the weighted average daily volume of weighted average prices for the fifteen trading sessions prior to the previous Friday (excluded) the date on which the bonus is agreed by the board of executive directors of the Bank. iv) Shares assigned by deferred variable remuneration plans The following table shows the number of Santander shares assigned to each executive director and pending delivery as of January 1, 2017, December 31, 2017 and 2018, as well as the gross shares that were delivered to them in 2017 and 2018, either in the form of an immediate payment or a deferred payment. In this case after having been appraised by the board, at the proposal of the remuneration committee, that the corresponding one-fifth (one third until 2014) of each plan had accrued. They bring cause of each of the plans through which the variable remunerations of deferred conditional variable remuneration plans in 2013, 2014 and 2015 and of the deferred conditional and linked to multiannual objectives 2018, 2017 and 2016. In order to mitigate the dilutive effect (and, therefore, not linked to the performance of the Group) of the capital increase with preferential subscription rights of the Bank that took place on July 2017 in certain cycles of the deferred compensation and long term incentive plans, the increase in the number of shares to be delivered to its beneficiaries was approved, considering for this a valuation of preferential subscription rights equivalent to their theoretical value, EUR 0.1047 per right. The effect of increasing the number of shares is detailed in the corresponding column of the table below. Shares Shares Shares Shares Shares Shares Variable Maximum delivered delivered delivered delivered Shares Variable delivered delivered Shares Shares remuneration Maximum number of in 2017 in 2017 in 2017 in 2017 arising from remuneration Maximum in 2018 in 2018 delivered delivered 2018 number shares to be (immediate (deferred (deferred (deferred the capital 2017 (maximum number (immediate (deferred in, 2018 (deferred in, 2018 (deferred (maximum of shares delivered at payment 2016 payment 2014 payment 2013 payment 2012 increase of number of of shares to be payment 2016 payment 2015 payment 2014 payment 2013 number of to be delivered at Share-based January 1, variable variable variable variable July shares to be delivered at variable variable variable variable shares to be December 31, variable remuneration 2017 remuneration) remuneration) remuneration) remuneration) 2017 delivered) December 31, 2017 remuneration) remuneration) remuneration) remuneration) delivered) (1) 2018(4) 2013 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 33,120 (33,120) — Mr. José Antonio Álvarez Álvarez (2) 19,561 (19,561) — Mr. Matías Rodríguez Inciarte 34,547 (34,547) — 87,228 (87,228) — 2014 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 121,630 (60,814) 905 61,721 — (61,721) — Mr. José Antonio Álvarez Álvarez (2) 52,484 (26,242) 390 26,632 — (26,632) — Mr. Matías Rodríguez Inciarte (3) 92,725 (46,363) 690 47,052 — (47,052) — 266,839 (133,419) 1,985 135,405 — (135,405) — 2015 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 317,300 (63,460) 3,777 257,617 — (64,404) 193,213 Mr. José A

Loans and advances to central b

Loans and advances to central banks and credit institutions	12 Months Ended
	Dec. 31, 2018
Loans and advances to central banks and credit institutions
Loans and advances to central banks and credit institutions	6. Loans and advances to central banks and credit institutions The detail, by classification, type and currency, of Loans and advances to central banks and credit institutions in the consolidated balance sheets is as follows: Million of euros 2018 (*) 2017 2016 CENTRAL BANKS Classification: Financial assets held for trading — — — Non-trading financial assets mandatorily at fair value through profit or loss — Financial assets designated at fair value through profit or loss 9,226 — — Financial assets designated at fair value through other comprehensive income — Financial assets at amortised cost 15,601 Loans and receivables — 26,278 27,973 24,827 26,278 27,973 Type: Time deposits 15,601 17,359 14,445 Reverse repurchase agreements 9,226 8,919 13,528 Impaired assets — — — Valuation adjustments for impairment — — — 24,827 26,278 27,973 CREDIT INSTITUTIONS Classification: Financial assets held for trading — 1,696 3,221 Non-trading financial assets mandatorily at fair value through profit or loss 2 Financial assets designated at fair value through profit or loss 23,097 9,889 10,069 Financial assets designated at fair value through other comprehensive income — Financial assets at amortised cost 35,480 Loans and receivables — 39,567 35,424 58,579 51,152 48,714 Type: Time deposits 10,759 8,169 6,577 Reverse repurchase agreements 33,547 21,765 20,867 Non- loans advances 14,283 21,232 21,281 Impaired assets 2 4 4 Valuation adjustments for impairment (12) (18) (15) 58,579 51,152 48,714 Currency: Euro 24,801 23,286 24,278 Pound sterling 4,073 5,582 4,337 US dollar 19,238 15,325 11,996 Brazilian real 28,310 28,140 32,013 Other currencies 6,984 5,097 4,063 TOTAL 83,406 77,430 76,687 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b) . The loans and advances classified under Financial assets designated at fair value through profit or loss consist of assets of Spanish and foreign institutions acquired under reverse repurchase agreements. The loans and advances to credit institutions classified under Financial assets at amortised cost (IFRS9) and Loans and receivables (IAS39) are mainly time accounts and deposits. Note 51 contains a detail of the residual maturity periods of Financial assets at amortised cost (IFRS9) and Loans and receivables (IAS39) and of the related average interest rates. At December 31, 2018 the exposure and the loan loss provision by impairment stage of assets accounted for under IFRS9 amounts to EUR 51,090 million and EUR 12 million in stage 1, EUR 1 million without loan loss provision in stage 2, and EUR 2 million without loan loss provision in stage 3.

Debt instruments

Debt instruments	12 Months Ended
	Dec. 31, 2018
Disclosure of Debt Instruments [Abstract]
Debt Instruments	7. Debt instruments a) Detail The detail, by classification, type and currency, of Debt instruments in the consolidated balance sheets is as follows: Million of euros 2018 (*) 2017 2016 Classification: Financial assets held for trading 27,800 36,351 48,922 Non-trading financial assets mandatorily at fair value through profit or loss 5,587 Financial assets designated at fair value through profit or loss 3,222 3,485 3,398 Financial assets designated at fair value through other comprehensive income 116,819 Financial assets available-for-sale — 128,481 111,287 Financial assets at amortised cost 37,696 Loans and receivables — 17,543 13,237 Held-to-maturity investments — 13,491 14,468 191,124 199,351 191,312 Type: Spanish government debt securities (**) 50,488 59,186 45,696 Foreign government debt securities 99,959 99,424 103,070 Issued by financial institutions 10,574 12,155 16,874 Other fixed-income securities 29,868 28,299 25,397 Impaired financial assets 870 1,017 773 Impairment losses (635) (730) (498) 191,124 199,351 191,312 Currency: Euro (**) 76,513 93,250 73,791 Pound sterling 19,153 16,203 16,106 US dollar 22,864 25,191 31,401 Brazilian real 40,871 39,233 43,370 Other currencies 32,358 26,204 27,142 Total gross 191,759 200,081 191,810 Impairment losses (635) (730) (498) 191,124 199,351 191,312 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) The increase in 2017 corresponds mainly to Banco Popular Español, S.A.U. acquisition. At December 31, 2018 the exposure by impairment stage of the book assets under IFRS9 amounted to EUR 154,164 million in stage 1, EUR 117 million in stage 2, and EUR 870 million in stage 3, respectively. b) The breakdown, by origin of the issuer, of Debt instruments at December 31, 2018, 2017 and 2016, net of impairment losses, is as follows: Million of euros 2018 2017 2016 Private Public Private Public Private Public fixed-income fixed-income Total % fixed-income fixed-income Total % fixed-income fixed-income Total % Spain 4,748 50,488 55,236 28.90 % 5,272 59,186 64,458 32.33 % 6,153 45,696 51,849 27.10 % United Kingdom 5,615 9,512 15,127 7.91 % 4,339 10,717 15,056 7.55 % 3,531 11,910 15,441 8.07 % Portugal 3,663 6,943 10,606 5.55 % 3,972 7,892 11,864 5.95 % 4,068 7,689 11,757 6.15 % Italy (*) 857 3,134 3,991 2.09 % 1,287 7,171 8,458 4.24 % 1,035 3,547 4,582 2.40 % Ireland (**) 4,543 2 4,545 2.38 % 3,147 2 3,149 1.58 % 518 — 518 0.27 % Poland 683 10,489 11,172 5.85 % 772 6,619 7,391 3.71 % 707 6,265 6,972 3.64 % Other European countries 6,101 1,518 7,619 3.99 % 7,195 1,733 8,928 4.48 % 7,203 1,736 8,939 4.67 % United States 6,833 10,362 17,195 9.00 % 7,986 11,670 19,656 9.86 % 10,559 13,058 23,617 12.34 % Brazil 5,285 36,583 41,868 21.91 % 4,729 34,940 39,669 19.90 % 5,364 39,770 45,134 23.59 % Mexico 520 11,325 11,845 6.20 % 461 9,478 9,939 4.99 % 587 10,628 11,215 5.86 % Chile 79 2,729 2,808 1.47 % 62 4,071 4,133 2.07 % 1,315 3,643 4,958 2.59 % Other American countries 1,111 1,375 2,486 1.30 % 755 913 1,668 0.84 % 782 1,262 2,044 1.07 % Rest of the world 639 5,987 6,626 3.47 % 764 4,218 4,982 2.50 % 724 3,562 4,286 2.24 % 40,677 150,447 191,124 100 % 40,741 158,610 199,351 100 % 42,546 148,766 191,312 100 % (*) Of the exposure in Italy, EUR 1,855 million corresponds to bonds sold in forward. (**) Includes mainly UK securities issued by Irish vehicles with underlying risk UK. The detail, by issuer rating, of Debt instruments at December 31, 2018, 2017 and 2016 is as follows: Million of euros 2018 2017 2016 Private Public Private Public Private Public fixed-income fixed-income Total % fixed-income fixed-income Total % fixed-income fixed-income Total % AAA 18,901 834 19,735 10.33 % 16,239 924 17,163 8.61 % 18,916 1,008 19,924 % AA 2,715 20,966 23,681 12.39 % 2,714 23,522 26,236 13.16 % 1,632 29,639 31,271 % A 3,464 69,392 72,856 38.12 % 4,373 8,037 12,410 6.23 % 2,928 3,285 6,213 % BBB 5,093 21,837 26,930 14.09 % 6,449 91,012 97,461 48.89 % 7,579 66,955 74,534 % Below BBB 668 37,412 38,080 19.92 % 2,393 35,109 37,502 18.81 % 4,751 47,872 52,623 % Unrated 9,836 6 9,842 5.15 % 8,573 6 8,579 4.30 % 6,740 7 6,747 % 40,677 150,447 191,124 100 % 40,741 158,610 199,351 100 % 42,546 148,766 191,312 100 % The distribution of the exposure by rating level of the previous table has been affected by the different ratings reviews of the sovereign issuers that have occurred in recent years. Thus, the principal changes in 2018 have been Spain and Poland which went from BBB+ to A-. Likewise, the main revisions during 2017 were Portugal that went from BB+ to BBB- and Chile from AA- to A+. During 2016 United Kingdom went from AAA to AA, Poland went from A to BBB, and Argentina that did not have a rating went to B-. The detail, by type of financial instrument, of Private fixed-income securities at December 31, 2018, 2017 and 2016, net of impairment losses, is as follows: Million of euros 2018 2017 2016 Securitised mortgage bonds 2,942 2,458 1,584 Other asset-backed bonds 9,805 5,992 2,803 Floating rate debt 13,721 13,756 11,818 Fixed rate debt 14,209 18,535 26,341 Total 40,677 40,741 42,546 c) The changes in the impairment losses on Debt instruments are summarised below: Million of euros 2018 (*) 2017 2016 Balance at beginning of year 704 498 291 Net impairment losses for the year (**) 43 348 380 Of which: Impairment losses charged to income 138 386 423 Impairment losses reversed with a credit to income (95) (38) (43) Exchange differences and other items (112) (116) (172) Balance at end of year 635 730 498 Of which: By geographical location of risk: European Union 22 30 40 Latin America 613 700 458 (**) Of which: Loans and advances — 348 405 Financial assets at amortised cost 43 Financial assets available for sale — — (25) Financial assets designated at fair value through other comprehensive income — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). At December 31, 2018 the loan loss provision by impairment stage of the assets accounted for under IFRS9 amounted to EUR 30 million in stage 1, EUR 9 million in stage 2, and EUR 596 million in stage 3.

Equity instruments

Equity instruments	12 Months Ended
	Dec. 31, 2018
Equity Instruments Abstract
Equity instruments	8. Equity instruments a) Breakdown The detail, by classification and type, of Equity instruments in the consolidated balance sheets is as follows: Million of euros 2018 (*) 2017 2016 Classification: Financial assets held for trading 8,938 21,353 14,497 Non-trading financial assets mandatorily at fair value through profit or loss 3,260 Financial assets designated at fair value through profit or loss — 933 546 Financial assets designated at fair value through other comprehensive income 2,671 Financial assets available-for-sale — 4,790 5,487 14,869 27,076 20,530 Type: Shares of Spanish companies 3,448 4,199 3,098 Shares of foreign companies 9,107 20,448 15,342 Investment fund shares 2,314 2,429 2,090 14,869 27,076 20,530 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Note 29 contains a detail of the Other comprehensive income, recognised in equity, on Financial assets designated at fair value through other comprehensive income (IFRS9) and Financial assets available-for-sale, and also the related impairment losses (IAS39). b) Changes The changes in Financial assets at fair value through other comprehensive income (IFRS9), and Financial assets available-for-sale (IAS39) were as follows: Million of euros 2018 (*) 2017 2016 Balance at beginning of the year 3,169 5,487 4,849 Net additions (disposals) (324) (331) (294) Of which: Visa Europe, Ltd. — — (263) Valuation adjustment and other items (174) (366) 932 Balance at end of year 2,671 4,790 5,487 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Visa Europe, Ltd. On June 21, 2016 the Group disposed its Visa Europe, Ltd. stake, classified as available for sale, obtaining a gain net of taxes of EUR 227 million (see Note 44 Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net). c) The notifications of the acquisitions and disposals of holdings in investees made by the Bank in 2018, in compliance with Article 155 of the Spanish Limited Liability Companies Law and Article 125 of Spanish Securities Market Law 24/1998, are listed in Appendix IV.

Trading derivatives (assets and

Trading derivatives (assets and liabilities) and short positions	12 Months Ended
	Dec. 31, 2018
Trading Derivatives And Short Positions [Abstract]
Trading derivatives (assets and liabilities) and short positions	9. Trading Derivatives (assets and liabilities) and short positions a) The detail, by type of inherent risk, of the fair value of the trading derivatives arranged by the Group is as follows (see Note 11): Million of euros 2018 2017 2016 Debit Credit Debit Credit Debit Credit balance balance balance balance balance balance Interest rate risk 36,087 36,487 38,030 37,582 47,884 48,124 Currency risk 16,912 17,025 16,320 18,014 21,087 23,500 Price risk 2,828 1,673 2,167 2,040 2,599 2,402 Other risks 112 156 726 256 473 343 55,939 55,341 57,243 57,892 72,043 74,369 b) Following is a breakdown of the short positions (liabilities): Million of euros 2018 2017 2016 Borrowed securities: Debt instruments 1,213 2,447 2,250 Of which: Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 1,213 890 930 Santander UK plc — 1,557 1,319 Equity instruments 1,087 1,671 1,142 Of which: Santander UK plc — 1,500 991 Banco Santander, S.A. 987 98 103 Short sales: Debt instruments 12,702 16,861 19,613 Of which: Banco Santander, S.A. 5,336 8,621 7,472 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 26 46 1,872 Banco Santander (Brasil) S.A. 7,300 8,188 9,197 15,002 20,979 23,005

Loans and advances to customers

Loans and advances to customers	12 Months Ended
	Dec. 31, 2018
Loans And Advances To Customers Abstract
Loans and advances to customers	10. Loans and advances to customers a) The detail, by classification, of Loans and advances to customers in the consolidated balance sheets is as follows: Million of euros 2018 (*) 2017 2016 Financial assets held for trading (**) 202 8,815 9,504 Non-trading financial assets mandatorily at fair value through profit or loss 1,881 Financial assets designated at fair value through profit or loss 21,915 20,475 17,596 Financial assets at fair value through other comprehensive income 1,601 Financial assets at amortised cost 857,322 Loans and receivables — 819,625 763,370 Of which: Impairment losses (23,307) (23,934) (24,393) 882,921 848,915 790,470 Loans and advances to customers disregarding impairment losses 906,228 872,849 814,863 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) The decrease reflects the run-down of UK's trading business due to the banking reform (Ring-fencing). Note 51 contains a detail of the residual maturity periods of financial assets at amortised cost (IFRS9) and loans and receivables (IAS39) and of the related average interest rates. Note 54 shows the Group’s total exposure, by origin of the issuer. There are no loans and advances to customers for material amounts without fixed maturity dates. b) Following is a breakdown, by loan type and status, geographical area of residence and interest rate formula, of the loans and advances to customers of the Group, which reflect the Group’s exposure to credit risk in its core business, disregarding impairment losses: Million of euros 2018 2017 2016 Loan type and status: Commercial credit 33,301 29,287 23,894 Secured loans 478,068 473,936 454,677 Reverse repurchase agreements 32,310 18,864 16,609 Other term loans 265,696 257,441 232,288 Finance leases 30,758 28,511 25,357 Receivable on demand 8,794 6,721 8,102 Credit cards receivables 23,083 21,809 21,363 Impaired assets 34,218 36,280 32,573 906,228 872,849 814,863 Geographical area: Spain 215,764 227,446 161,372 European Union (excluding Spain) 411,550 390,536 379,666 United States and Puerto Rico 89,325 75,777 87,318 Other OECD countries 82,607 74,463 74,157 Latin America (non-OECD) 87,406 88,302 93,207 Rest of the world 19,576 16,325 19,143 906,228 872,849 814,863 Interest rate formula: Fixed rate 497,365 447,788 417,448 Floating rate 408,863 425,061 397,415 906,228 872,849 814,863 At December 31, 2018, 2017 and 2016 the Group had granted loans amounting to EUR 13,615, 16,470 and 14,127 million to Spanish public sector agencies which had a rating at December 31, 2018 of A (ratings of BBB at December 31, 2017 and 2016), and EUR 10,952, 18,577 and 16,483 million to the public sector in other countries (at December 31, 2018, the breakdown of this amount by issuer rating was as follows: 13.8% AAA, 12.2% AA, 3.2% A, 58.3% BBB and 12.5% below BBB). Without considering the Public Administrations, the amount of the loans and advances at December 31, 2018 amounts to EUR 881,661 million, of which, EUR 847,443 million euros are classified as performing. The above-mentioned ratings were obtained by converting the internal ratings awarded to customers by the Group (See Note 54) into the external ratings classification established by Standard & Poor’s, in order to make them more readily comparable. Following is a detail, by activity, of the loans to customers at December 31, 2018, net of impairment losses: Million of euros Secured loans Net exposure Loan-to-value ratio (***) More than More than More than 40% and 60% and 80% and Of which: Of which: Less than less than less than less than Without property other or equal or equal to or equal to or equal to More than Total collateral collateral collateral to 40% 60% 80% 100% 100% Public sector 22,659 21,480 279 900 114 86 125 699 155 Other financial institutions (financial business activity) 53,155 15,929 864 36,362 684 388 196 35,663 295 Non-financial corporations and individual entrepreneurs (non-financial business activity) (broken down by purpose) 301,975 173,482 68,555 59,938 24,752 21,090 17,244 38,514 26,893 Of which: Construction and property development 24,641 1,884 20,855 1,902 8,300 6,224 4,208 2,126 1,899 Civil engineering construction 3,248 1,803 525 920 138 306 157 368 476 Large companies 156,666 104,023 18,949 33,694 5,766 6,671 6,657 19,022 14,527 SMEs and individual entrepreneurs 117,420 65,772 28,226 23,422 10,548 7,889 6,222 16,998 9,991 Households – other (broken down by purpose) 487,695 115,997 321,119 50,579 83,889 104,266 103,496 46,296 33,751 Of which: Residential 314,017 1,682 311,513 822 77,643 97,815 98,240 32,361 6,276 Consumer loans 156,116 109,810 2,387 43,919 3,406 4,709 3,225 8,766 26,200 Other purposes 17,562 4,505 7,219 5,838 2,840 1,742 2,031 5,169 1,275 Total (*) 865,484 326,888 390,817 147,779 109,439 125,830 121,061 121,172 61,094 Memorandum item Refinanced and restructured transactions (**) 30,527 6,278 14,032 10,217 3,328 3,422 3,210 3,541 10,748 (*) In addition, the Group has granted advances to customers amounting to EUR 17,437 million, bringing the total of loans and advances to EUR 882,921 million. (**) Includes the net balance of the impairment of the accumulated value or accumulated losses in the fair value due to credit risk. (***) The ratio is the carrying amount of the transactions at December 31, 2018 provided by the latest available appraisal value of the collateral. Note 54 contains information relating to the restructured/refinanced loan book. Following is the movement of the gross exposure broken down by impairment stage of loans and advances to customers recognised under "Financial assets at amortised cost" and “Financial assets at fair value through other comprehensive income” under IFRS9 during 2018: Millions of euros Stage 1 Stage 2 Stage 3 Total Balance at the beginning of year 746,654 60,304 35,477 842,435 Movements Transfers Transfer to Stage 2 from Stage 1 (31,234) 31,234 — Transfer to Stage 3 from Stage 1 (3,980) 3,980 — Transfer to Stage 3 from Stage 2 (13,998) 13,998 — Transfer to Stage 1 from Stage 2 21,795 (21,795) — Transfer to Stage 2 from Stage 3 4,103 (4,103) — Transfer to Stage 1 from Stage 3 835 (835) — Net changes on financial assets 79,727 (5,265) (1,997) 72,465 Write-offs — — (12,673) (12,673) Exchange differences and others (17,968) (2,400) (386) (20,754) Loss allowance as of December 31, 2018 795,829 52,183 33,461 881,473 At December 31, 2018, the Group had EUR 757 million (January 1, 2018: EUR 803 million) in purchased credit-impaired assets, which relate mainly to the business combinations carried out by the Group. c) The changes in the impairment losses on the assets making up the balances of financial assets at amortised cost and at fair value through other comprehensive income - Loans and advances - Customers: Million of euros 2018 2017 2016 Balance at beginning of the year (*) 25,936 24,393 26,517 Impairment losses charged to income for the year 10,501 10,513 10,734 Of which: Impairment losses charged to profit or loss 17,850 19,006 17,081 Impairment losses reversed with a credit to profit or loss (7,349) (8,493) (6,347) Change of perimeter — — (136) Write-off of impaired balances against recorded impairment allowance (12,673) (13,522) (12,758) Exchange differences and other changes (**) (457) 2,550 36 Balance at end of the year 23,307 23,934 24,393 Which correspond to: Impaired assets 14,906 16,207 15,331 Other assets 8,401 7,727 9,062 Of which: Individually calculated 4,905 5,311 6,097 Collective calculated 18,402 18,623 18,296 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) In 2017, mainly includes the balances from the acquisition of Banco Popular Español, S.A.U. In addition, provisions for debt securities amounting to EUR 43 million (December 31, 2017: EUR 348 million; December 31, 2016: EUR 405 million) and written-off assets recoveries have been recorded in the year amounting to EUR 1,558 million. (December 31, 2017: EUR 1,620 million; December 31, 2016: EUR 1,582 million). With this, the impairment recorded in Financial assets at amortised cost amounts EUR 8,986 million (December 31, 2017: EUR 9,241 million; December 31, 2016: EUR 9,557 million). Following is the movement of the loan loss provision broken down by impairment stage of loans and advances to customers recognised under "Financial assets at amortised cost" under IFRS9 during 2018: Millions of euros Stage 1 Stage 2 Stage 3 Total Loss allowance as of January 1, 2018 4,350 5,079 16,507 25,936 Transfers Transfer from Stage 2 to Stage 1 (1,173) 3,854 2,681 Transfer from Stage 3 to Stage 1 (279) 1,264 985 Transfer from Stage 3 to Stage 2 (1,971) 4,529 2,558 Transfer from Stage 1 to Stage 2 438 (1,656) (1,218) Transfer from Stage 2 to Stage 3 435 (1,264) (829) Transfer from Stage 1 to Stage 3 84 (173) (89) Net changes of the exposure and modifications in the credit risk 304 (961) 7,070 6,413 Write-offs — — (12,673) (12,673) FX and other movements (66) (37) (354) (457) Carrying amount as of December 31, 2018 3,658 4,743 14,906 23,307 d) The detail of the changes in the balance of the financial assets classified as Financial assets at amortised cost – Customers (IFRS9) and Loans and receivables - Loans and advances to customers (IAS39) considered to be impaired due to credit risk is as follows: Million of euros 2018 2017 2016 Balance at beginning of year 36,280 32,573 36,133 Net additions 10,821 8,409 7,393 Written-off assets (12,673) (13,522) (12,758) Changes in the scope of consolidation 177 9,618 661 Exchange differences and other (387) (798) 1,144 Balance at end of year 34,218 36,280 32,573 This amount, after deducting the related allowances, represents the Group’s best estimate of the discounted value of the flows that are expected to be recovered from the impaired assets. At December 31, 2018, the Group’s written-off assets totalled EUR 47,751 million (December 31, 2017: EUR 43,508 million; December 31, 2016: EUR 40,473 million). Following is a detail of the financial assets classified as Financial assets at amortised cost (IFRS9) and Loans and receivables to costumers (IFRS39) and considered to be impaired due to credit risk at December 31, 2018, classified by geographical location of risk and by age of the oldest past-due amount: Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 5,671 780 551 656 8,724 16,382 European Union (excluding Spain) 2,940 1,213 577 519 2,662 7,911 United States and Puerto Rico 1,906 531 30 31 178 2,676 Other OECD countries 1,414 498 143 162 520 2,737 Latin America (non-OECD) 1,221 1,145 782 561 803 4,512 13,152 4,167 2,083 1,929 12,887 34,218 The detail at December 31, 2017 is as follows: Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 6,012 938 793 814 9,643 18,200 European Union (excluding Spain) 2,023 1,526 811 558 3,829 8,747 United States and Puerto Rico 1,221 641 42 50 192 2,146 Other OECD countries 1,523 563 166 128 378 2,758 Latin America (non-OECD) 945 1,309 709 578 888 4,429 11,724 4,977 2,521 2,128 14,930 36,280 The detail at December 31, 2016 is as follows: Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 4,845 508 360 625 7,009 13,347 European Union (excluding Spain) 2,648 1,783 877 654 3,262 9,224 United States and Puerto Rico 805 833 38 61 242 1,979 Other OECD countries 1,601 481 145 158 474 2,859 Latin America (non-OECD) 1,242 1,059 1,131 677 1,055 5,164 11,141 4,664 2,551 2,175 12,042 32,573 Set forth below for each class of impaired asset are the gross amount, associated allowances and information relating to the collateral and/or other credit enhancements obtained at December 31, 2018: Million of euros Estimated Gross Allowance collateral amount recognised value(*) Without associated real collateral 13,250 (8,636) — With real estate collateral 16,228 (4,408) 11,653 With other collateral 4,740 (1,862) 1,913 Total 34,218 (14,906) 13,566 (*) Including the estimated value of the collateral associated with each loan. Accordingly, any other cash flows that may be obtained, such as those arising from borrowers’ personal guarantees, are not included. When classifying assets in the previous table, the main factors considered by the Group to determine whether an asset has become impaired are the existence of amounts past due -assets impaired due to arrears- or other circumstances may be arise which will not result in all contractual cash flow being recovered, such as a deterioration of the borrower’s financial situation, the worsening of its capacity to generate funds or difficulties experienced by it in accessing credit. Past-due amounts receivable In addition, at December 31, 2018, there were assets with amounts receivable that were past due by 90 days or less, the detail of which, by age of the oldest past-due amount, is as follows: Million of euros Less than1 1 to 2 2 to 3 month months months Loans and advances to customers 2,023 629 617 Of which Public Sector 5 — — Total 2,023 629 617 e) Loans and advances to customers includes, inter alia, the securitised loans transferred to third parties on which the Group has retained the risks and rewards, albeit partially, and which therefore, in accordance with the applicable accounting standards, cannot be derecognised. The breakdown of the securitised loans, by type of original financial instrument, and of the securitised loans derecognised because the stipulated requirements were met (See Note 2.e) is shown below. Note 22 details the liabilities associated with these securitisation transactions. Million of euros 2018 2017 2016 Derecognised 47 241 477 Of which Securitised mortgage assets (*) 47 241 477 Retained on the balance sheet 88,767 91,208 100,675 Of which Securitised mortgage assets 33,900 36,844 44,311 Of which: UK assets 13,519 15,694 20,969 Other securitised assets 54,867 54,364 56,364 Total 88,814 91,449 101,152 (*) Of which EUR 35 million correspond to the amount of Multifamily loans of Santander Bank, National Association. Securitisation is used as a tool for the management of regulatory capital and as a means of diversifying the Group's liquidity sources. In 2018, 2017 and 2016 the Group did not derecognise any of the securitisations performed, and the balance shown as derecognised for those years relates to securitisations performed in prior years. The loans derecognised include assets of Santander Bank, National Association amounting to approximately EUR 35 million at December 31, 2018 (December 31, 2017: EUR 113 million; December 31, 2016: EUR 324 million) that were sold, prior to this company’s inclusion in the Group, on the secondary market for multifamily loans, and over which control was transferred and substantially all the associated risks and rewards were not retained. The loans retained on the face of the balance sheet include the loans associated with securitisations in which the Group retains a subordinated debt and/or grants any manner of credit enhancements to the new holders. The loans transferred through securitisation are mainly mortgage loans, loans to companies and consumer loans.

Trading derivatives

Trading derivatives	12 Months Ended
	Dec. 31, 2018
Derivatives [Abstract]
Trading derivatives	11. Trading derivatives The detail of the notional amounts and the market values of the trading derivatives held by the Group in 2018, 2017 and 2016 is as follows: Million of euros 2018 2017 2016 Notional Market Notional Market Notional Market amount value amount value amount value Trading derivatives: Interest rate risk Forward rate agreements 308,340 (1) 190,553 (15) 370,244 (64) Interest rate swaps 4,197,246 115 3,312,025 974 3,092,360 804 Options, futures and other derivatives 543,138 (514) 540,424 (511) 565,635 (980) Credit risk Credit default swaps 18,889 33 25,136 68 38,827 37 Foreign currency risk Foreign currency purchases and sales 275,449 301 236,805 (29) 259,336 1,102 Foreign currency options 54,215 2 43,488 (37) 36,965 112 Currency swaps 334,524 (416) 295,753 (1,628) 321,316 (3,627) Securities and commodities derivatives and other 59,932 1,078 70,325 529 76,523 290 Total 5,791,733 598 4,714,509 (649) 4,761,206 (2,326)

Non-current assets

Non-current assets	12 Months Ended
	Dec. 31, 2018
Non-current assets held for sale
Non-current assets	12. Non-current assets The detail of Non-current assets held for sale in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 Tangible assets 5,424 11,661 5,743 Of which: Foreclosed assets 5,334 11,566 5,640 Of which: property assets in Spain 4,488 10,533 4,902 Other tangible assets held for sale 90 95 103 Other assets (*) 2 3,619 29 Total (**) 5,426 15,280 5,772 (*) In 2017 include, mainly, Banco Popular Español, S.A.U. assets under the sale of the real estate business to Blackstone (see Note 3). (**) In March 2018, the agreement for the operation of Banco Popular Español, S.A.U. real estate business with Blackstone has materialised (see Note 3). At December 31, 2018, the allowances recognised for the total non-current assets held for sale represented 49% (2017: 50% without considering the assets of Banco Popular Español, S.A.U. sold on March 2018 and 2016: 51%). The charges recorded in those years amounted to EUR 320 million, EUR 347 million and EUR 241 million, respectively, and the recoveries during these exercises are amounted to EUR 61 million, EUR 41 million and EUR 29 million, respectively. Without taking into consideration the Blackstone agreement already mentioned in Note 2, during 2018 the Group sold, for EUR 1,578 million, foreclosed assets with a gross carrying amount of EUR 2,190 million, for which provisions totalling EUR 736 million had been recognised. These sales gave rise to gains of EUR 124 million. In addition, other tangible assets were sold for EUR 117 million, giving rise to a gain of EUR 12 million.

Investments

Investments	12 Months Ended
	Dec. 31, 2018
Investments
Investments	13. Investments a) The detail, by company, of Investments is as follows: Million of euros 2018 2017 2016 Associated entities Project Quasar Investment 2017 S.L. 1,701 — — Merlin Properties, SOCIMI, S.A. 1,358 1,242 1,168 Metrovacesa, S.A. 1,255 — — Companies Zurich Santander 961 988 1,011 Testa Residencial, SOCIMI, S.A. — 651 307 Allianz Popular, S.L. 431 438 — Companies Santander Insurance 392 358 325 Other companies 511 520 431 6,609 4,197 3,242 Joint Ventures entities Wizink Bank, S.A. — — Unión de Créditos Inmobiliarios, S.A., EFC 202 207 177 Santander Generales Seguros y Reaseguros, S.A. y Santander Vida Seguros y Reaseguros, S.A. (former Aegon Santander Seguros) 163 186 197 SAM Investment Holdings Limited (*) — — 525 Other companies 614 577 695 979 1,987 1,594 (*) SAM Investment Holdings Limited became part of the Group in 2017. Of the entities included above, at December 31, 2018, the entity Merlin Properties, SOCIMI, S.A, Metrovacesa S.A. and Compañía Española de Viviendas en Alquiler, S.A. are the only listed companies. a) Changes The changes in the investments were as followed: Million of euros 2018 (*) 2017 2016 Balance at beginning of year 6,150 4,836 3,251 Acquisitions (disposals) of companies and capital increases (reductions) (1,761) 1,893 (72) Of which: Wizink Bank, S.A. (1,033) 1,017 — Allianz Popular, S.L. — 438 — Changes in the consolidation method (Note 3) 2,967 (582) 1,457 Of which: Quasar 1,701 — — Metrovacesa 1,255 — — Effect of equity accounting 737 704 444 Dividends paid and reimbursements of share premium (404) (376) (305) Exchange differences and other changes (101) (291) 61 Balance at end of year 7,588 6,184 4,836 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). c) In 2018, 2017 and 2016 there was no evidence of material impairment on the Group’s investments. d) Following is a summary of the financial information on the companies accounted for using the equity method (obtained from the information available at the date of preparation of the financial statements): Million of euros 2018 2017 2016 Total assets 74,765 63,093 55,791 Total liabilities (58,153) (51,242) (45,623) Net assets 16,612 11,851 10,168 Group’s share of net assets 6,157 4,194 3,381 Goodwill 1,431 1,990 1,455 Of which: Companies Zurich Santander 526 526 526 Wizink Bank, S.A. — 553 — Allianz Popular, S.L. 347 347 — Companies Santander Insurance 205 205 205 Total Group share 7,588 6,184 4,836 Total income 12,174 12,536 11,766 Total profit 1,867 1,699 984 Group’s share of profit 737 704 444 Following is a summary of the financial information for 2018 on the main associates and joint ventures (obtained from the information available at the date of preparation of the financial statements): Million of euros Total assets Total liabilities Total income Total profit Joint Ventures entities 21,934 20,324 4,301 334 Of which: Unión de Créditos Inmobiliarios, S.A., EFC 12,105 11,701 351 7 Santander Generales Seguros y Reaseguros, S.A. y Santander Vida Seguros y Reaseguros, S.A. (former Aegon Santander Seguros) 132 84 122 15 Associated entities 52,831 37,829 7,873 1,533 Of which: Companies Santander Zurich 13,805 12,915 4,143 402 Allianz Popular, S.L. 3,238 3,028 113 113 Companies Santander Insurance 2,276 1,899 822 77 Total 74,765 58,153 12,174 1,867

Insurance contracts linked to p

Insurance contracts linked to pensions	12 Months Ended
	Dec. 31, 2018
Disclosure of types of insurance contracts [abstract]
Insurance contracts linked to pensions	14. Insurance contracts linked to pensions The detail of Insurance contracts linked to pensions in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 Assets relating to insurance contracts covering post-employment benefit plan obligations: Banco Santander, S.A. 210 239 269 210 239 269

Liabilities and assets under in

Liabilities and assets under insurance contracts and reinsurance assets	12 Months Ended
	Dec. 31, 2018
Liabilities and Assets under insurance contracts and Reinsurance assets
Liabilities and assets under insurance contracts and reinsurance assets	15. Liabilities and assets under insurance contracts and reinsurance assets The detail of Liabilities under insurance contracts and reinsurance assets in the consolidated balance sheets (See Note 2.j) is as follows: Million of euros 2018 2017 2016 Direct Direct Direct insurance insurance insurance and Total and Total and Total reinsurance Reinsurance (balance reinsurance Reinsurance (balance reinsurance Reinsurance (balance Technical provisions for: assumed ceded payable) assumed ceded payable) assumed ceded payable) Unearned premiums and unexpired risks 52 (47) 5 50 (41) 9 61 (46) 15 Life insurance 227 (163) 64 483 (151) 332 159 (138) 21 Unearned premiums and risks 140 (127) 13 100 (96) 4 76 (76) — Mathematical provisions 87 (36) 51 383 (55) 328 83 (62) 21 Claims outstanding 397 (86) 311 423 (115) 308 358 (98) 260 Bonuses and rebates 20 (9) 11 29 (11) 18 19 (8) 11 Other technical provisions 69 (19) 50 132 (23) 109 55 (41) 14 765 (324) 441 1,117 (341) 776 652 (331) 321

Tangible assets

Tangible assets	12 Months Ended
	Dec. 31, 2018
Tangible assets
Tangible assets	16. Tangible assets a) The changes in Tangible assets in the consolidated balance sheets were as follows: Million of euros Leased out under an operating Investment For own use lease property Total Cost: Balances at January 1, 2016 17,442 14,921 7,345 39,708 Additions / disposals (net) due to change in the scope of consolidation (*) (17) 287 (4,278) (4,008) Additions / disposals (net) 763 2,380 (64) 3,079 Transfers, exchange differences and other items (76) 650 462 1,036 Balances at December 31, 2016 18,112 18,238 3,465 39,815 Additions / disposals (net) due to change in the scope of consolidation 1,740 205 — 1,945 Additions / disposals (net) 781 2,445 (100) 3,126 Transfers, exchange differences and other items (1,357) (2,215) (223) (3,795) Balances at December 31, 2017 19,276 18,673 3,142 41,091 Additions / disposals (net) due to change in the scope of consolidation 34 44 (630) (552) Additions / disposals (net) 589 5,545 (182) 5,952 Transfers, exchange differences and other items (1,164) 825 48 (291) Balances at December 31, 2018 18,735 25,087 2,378 46,200 Accumulated depreciation: Balances at January 1, 2016 (9,448) (3,376) (284) (13,108) Disposals due to change in the scope of consolidation 5 (3) 121 123 Disposals 311 457 29 797 Charge for the year (1,079) — (10) (1,089) Transfers, exchange differences and other items — (2,247) (53) (2,300) Balances at December 31, 2016 (10,211) (5,169) (197) (15,577) Disposals due to change in the scope of Consolidation — — — — Disposals 478 639 8 1,125 Charge for the year (1,165) — (25) (1,190) Transfers, exchange differences and other items (22) (1,574) 25 (1,571) Balances at December 31, 2017 (10,920) (6,104) (189) (17,213) Disposals due to change in the scope of consolidation (12) (34) — (46) Disposals 629 413 17 1,059 Charge for the year (1,159) — (13) (1,172) Transfers, exchange differences and other items 938 (2,679) (14) (1,755) Balances at December 31, 2018 (10,524) (8,404) (199) (19,127) Million of euros Leased out under an operating Investment For own use lease property Total Impairment losses: Balances at January 1, 2016 (45) (159) (1,076) (1,280) Impairment charge for the year (12) (43) (62) (117) Releases 1 1 60 62 Disposals due to change in the scope of Consolidation 1 — 309 310 Exchange differences and other 14 42 17 73 Balances at December 31, 2016 (41) (159) (752) (952) Impairment charge for the year (16) (42) (21) (79) Releases 4 — 3 7 Disposals due to change in the scope of Consolidation — (2) (1) (3) Exchange differences and other (24) 5 142 123 Balances at December 31, 2017 (77) (198) (629) (904) Impairment charge for the year (30) (56) (8) (94) Releases 6 — 5 11 Disposals due to change in the scope of Consolidation — — — — Exchange differences and other 40 15 16 71 Balances at December 31, 2018 (61) (239) (616) (916) Tangible assets, net: Balances at December 31, 2016 (*) 7,860 12,910 2,516 23,286 Balances at December 31, 2017 8,279 12,371 2,324 22,974 Balances at December 31, 2018 8,150 16,444 1,563 26,157 (*) The decreases in 2016 in Tangible assets - Investment property was due to the separation and deconsolidation of Metrovacesa, S.A. (See Note 3). b) The detail, by class of asset, of Tangible assets - For own use in the consolidated balance sheets is as follows: Million of euros Accumulated Impairment Carrying Cost depreciation losses amount Land and buildings 5,713 (1,967) (41) 3,705 IT equipment and fixtures 5,225 (4,161) — 1,064 Furniture and vehicles 6,963 (4,023) — 2,940 Construction in progress and other items 211 (60) — 151 Balances at December 31, 2016 18,112 (10,211) (41) 7,860 Land and buildings 5,892 (2,014) (77) 3,801 IT equipment and fixtures 5,608 (4,422) — 1,186 Furniture and vehicles 7,213 (4,391) — 2,822 Construction in progress and other items 563 (93) — 470 Balances at December 31, 2017 19,276 (10,920) (77) 8,279 Land and buildings 6,127 (2,056) (61) 4,010 IT equipment and fixtures 5,605 (4,455) — 1,150 Furniture and vehicles 6,686 (3,946) — 2,740 Construction in progress and other items 317 (67) — 250 Balances at December 31, 2018 18,735 (10,524) (61) 8,150 The carrying amount at December 31, 2018 in the foregoing table includes the following approximate amounts EUR 5,390 million (December 31, 2017: EUR 5,455 million; December 31, 2016: EUR 5,906 million) relating to property, plant and equipment owned by Group entities and branches located abroad. c) The fair value of investment property at December 31, 2018 amounted to EUR 1,825 million (2017: EUR 2,435 million; 2016: EUR 2,583 million). A comparison of the fair value of investment property at December 31, 2018, with the net book value shows gross unrealised gains of EUR 262 million (2017: EUR 128 million and 2016: EUR 67 million), attributed completely to the group. The rental income earned from investment property and the direct costs related both to investment properties that generated rental income in 2018, 2017 and 2016 and to investment properties that did not generate rental income in those years are not material in the context of the consolidated financial statements.

Intangible assets - Goodwill

Intangible assets - Goodwill	12 Months Ended
	Dec. 31, 2018
Intangible assets - Goodwill
Intangible assets - Goodwill	17. Intangible assets – Goodwill The detail of goodwill, based on the cash-generating units giving rise thereto, is as follows: Million of euros 2018 2017 2016 Santander UK 8,307 8,375 8,679 Banco Santander (Brasil) 4,459 4,988 5,769 Santander Bank Polska 2,402 2,473 2,342 Santander Consumer USA 2,102 2,007 3,182 Santander Bank, National Association 1,793 1,712 1,948 Santander Consumer Germany 1,217 1,217 1,217 SAM Investment Holdings Limited 1,173 1,173 — Santander Portugal 1,040 1,040 1,040 Santander España (*) 1,023 648 371 Banco Santander - Chile 627 676 704 Santander Consumer Nordics 502 518 537 Grupo Financiero Santander (Mexico) 434 413 449 Other companies 387 529 486 Total goodwill 25,466 25,769 26,724 (*) Includes mainly goodwill arising from purchases of Popular's network and Wizink's card business. The changes in goodwill were as follows: Million of euros 2018 2017 2016 Balance at beginning of year 25,769 26,724 26,960 Additions (Note 3) 383 1,644 — Of which: SAM Investment Holdings Limited — 1,173 — Santander España 375 248 — Impairment losses — (899) (50) Of which: Santander Consumer USA — (799) — Disposals or changes in scope of consolidation (130) — (2) Exchange differences and other items (556) (1,700) (184) Balance at end of year 25,466 25,769 26,724 The Group has goodwill generated by cash-generating units located in non-euro currency countries (mainly the UK, Brazil, the United States, Poland, Chile, Norway, Sweden and Mexico) and, therefore, this gives rise to exchange differences on the translation to euros, at closing rates, of the amounts of goodwill denominated in foreign currencies. Accordingly, in 2018 there was an increase in goodwill, mainly due to the purchase of the card businesses from Wizink Bank, S.A. (the increase in 2017 is due to the purchase of Banco Popular Español, S.A.U) and a decrease by EUR 556 million (EUR 1,700 and 184 million in 2017 and 2016) due to exchange differences which, pursuant to current standards, were recognised with a debit to Other comprehensive income - Items that may be reclassified to profit or loss - Exchange differences in other comprehensive income in the consolidated statement of recognised income and expense (see Note 29.d). At least once per year (or whenever there is any indication of impairment), the Group reviews goodwill for impairment (i.e. a potential reduction in its recoverable value to below its carrying amount). The first step that must be taken in order to perform this analysis is the identification of the cash-generating units, i.e. the Group's smallest identifiable groups of assets that generate cash inflows that are largely independent of the cash inflows from other assets or groups of assets. The amount to be recovered of each cash-generating unit is determined taking into consideration the carrying amount (including any fair value adjustment arising on the business combination) of all the assets and liabilities of all the independent legal entities composing the cash-generating unit, together with the related goodwill. The amount to be recovered of the cash-generating unit is compared with its recoverable amount in order to determine whether there is any impairment. The Group’s directors assess the existence of any indication that might be considered to be evidence of impairment of the cash-generating unit by reviewing information including the following: (i) certain macroeconomic variables that might affect its investments (population data, political situation, economic situation -including banking concentration level-, among others) and (ii) various microeconomic variables comparing the investments of the Group with the financial services industry of the country in which the cash-generating unit carries on most of its business activities (balance sheet composition, total funds under management, results, efficiency ratio, capital adequacy ratio, return on equity, among others). Regardless of whether there is any indication of impairment, every year the Group calculates the recoverable amount of each cash-generating unit to which goodwill has been allocated and, to this end, it uses price quotations, if available, market references (multiples), internal estimates and appraisals performed by independent experts. Firstly, the Group determines the recoverable amount by calculating the fair value of each cash-generating unit on the basis of the quoted price of the cash-generating units, if available, and of the Price Earnings Ratio of comparable local entities. In addition, the Group performs estimates of the recoverable amounts of certain cash-generating units by calculating their value in use using discounted cash flow projections. The main assumptions used in this calculation are: (i) earnings projections based on the financial budgets approved by the Group’s directors which cover between three and five year period (unless a longer time horizon can be justified), (ii) discount rates determined as the cost of capital taking into account the risk-free rate of return plus a risk premium in line with the market and the business in which the units operate and (iii) constant growth rates used in order to extrapolate earnings in perpetuity which do not exceed the long-term average growth rate for the market in which the cash-generating unit in question operates. The cash flow projections used by Group management to obtain the values in use are based on the financial budgets approved by both local management of the related local units and the Group’s directors. The Group’s budgetary estimation process is common for all the cash-generating units. The local management teams prepare their budgets using the following key assumptions: a) Microeconomic variables of the cash-generating unit: management takes into consideration the current balance sheet structure, the product mix on offer and the business decisions taken by local management in this regard. b) Macroeconomic variables: growth is estimated on the basis of the changing environment, taking into consideration expected GDP growth in the unit’s geographical location and forecast trends in interest and exchange rates. These data, which are based on external information sources, are provided by the Group’s economic research service. c) Past performance variables: in addition, management takes into consideration in the projection the difference (both positive and negative) between the cash-generating unit’s past performance and that of the market. Following is a detail of the main assumptions used in determining the recoverable amount, at 2018 year-end, of the most significant cash-generating units which were valued using the discounted cash flow method: Nominal Projected Discount perpetual period rate (*) growth rate Santander UK 5 years 8.4 % 2.5 % Santander Consumer USA 3 years 11.1 % 1.5 % Santander Bank, National Association 3 years 10.6 % 3.8 % Santander Consumer Germany 5 years 8.5 % 2.5 % SAM Investment Holdings Limited 5 years 9.6 % 2.5 % Santander Portugal 5 years 9.6 % 2.0 % Santander Consumer Nordics 5 years 9.2 % 2.5 % (*) Post-tax discount rate. Given the degree of uncertainty of these assumptions, the Group performs a sensitivity analysis thereof using reasonable changes in the key assumptions on which the recoverable amount of the cash-generating units is based in order to confirm whether their recoverable amount still exceeds their carrying amount. The sensitivity analysis involved adjusting the discount rate by +/- 50 basis points and the perpetuity growth rate by +/- 50 basis points. Following the sensitivity analysis performed, the value in use of all the cash-generating units still exceeds their recoverable amount, albeit: - In the case of Santander Consumer USA, the Group recognised in 2017 a goodwill impairment amounting to EUR 799 million. The mentioned impairment was estimated considering the decrease in the entity’s profit in contrast with the forecasts carried out in the previous years, derived from a change in the long term business strategy. - As disclosed in note 1.h, the recent political events as consequence of UK intention to leave the European Union are producing economic volatility that has unfavourably affected the assumptions included in the Santander UK value in use estimate. This value is close to the recoverable amount. The recoverable amount of Santander Bank Polska (former Bank Zachodni WBK S.A.), Banco Santander - Chile, Grupo Financiero Santander (México) and Banco Santander (Brasil) was calculated as the fair values of the aforementioned cash-generating units obtained from the market prices of their shares at year-end. This value exceeded the recoverable amount. Based on the above, and in accordance with the estimates, forecasts and sensibility analysis available for the managers of the Bank, during 2018 the Group has not recognised goodwill impairment losses within Impairment losses on other assets (net) - Goodwill and other intangible assets caption (EUR 899 and 50 million during 2017 and 2016, respectively).

Intangible assets - Other intan

Intangible assets - Other intangible assets	12 Months Ended
	Dec. 31, 2018
Intangible assets
Intangible assets - Other intangible assets	18. Intangible assets - Other intangible assets The detail of Intangible assets - Other intangible assets in the consolidated balance sheets and of the changes therein in 2018, 2017, and 2016 is as follows: Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2017 disposals consolidation impairment impairment and other 2018 With indefinite useful life: Brand names 35 — — — — 1 36 With finite useful life: IT developments 3-7 years 6,945 1,468 1 — (1,102) (178) 7,134 Other 1,560 1 12 — (50) (13) 1,510 Accumulated amortisation (5,386) — (1) (1,253) 1,035 173 (5,432) Development (4,721) — (1) (1,153) 985 147 (4,743) Other (665) — — (100) 50 26 (689) Impairment losses (240) — — (117) 117 86 (154) Of which: addition — — — (118) — — — liberation — — — 1 — — — 2,914 1,469 12 (1,370) — 69 3,094 Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2016 disposals consolidation impairment impairment and other 2017 With indefinite useful life: Brand names 39 — — — — (4) 35 With finite useful life: IT developments 3-7 years 6,558 1,470 42 — (679) (446) 6,945 Other 1,245 68 436 — (126) (63) 1,560 Accumulated amortisation (4,848) — (64) (1,403) 694 235 (5,386) Development (4,240) — (14) (1,310) 627 216 (4,721) Other (608) — (50) (93) 67 19 (665) Impairment losses (297) — — (174) 111 120 (240) Of which: addition — — — (174) — — — 2,697 1,538 414 (1,577) — (158) 2,914 Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2015 disposals consolidation impairment impairment and other 2016 With indefinite useful life: Brand names 49 1 — — (11) — 39 With finite useful life: IT developments 3-7 years 5,411 1,726 — — (890) 311 6,558 Other 1,306 41 (124) — — 22 1,245 Accumulated amortisation (3,873) — — (1,275) 716 (416) (4,848) Development (3,353) — — (1,168) 716 (435) (4,240) Other (520) — — (107) — 19 (608) Impairment losses (423) — — (11) 185 (48) (297) Of which: addition — — — (11) — — — 2,470 1,768 (124) (1,286) — (131) 2,697 In 2018, 2017 and 2016, impairment losses of EUR 117, EUR 174 and EUR 11 million, respectively, were recognised under Impairment or reversal of impairment on non-financial assets, net – intangible assets. This impairment losses related mainly to the decline in or loss of the recoverable value of certain computer systems and applications as a result of the processes initiated by the Group to adapt to the various regulatory changes and to transform or integrate businesses.

Other assets

Other assets	12 Months Ended
	Dec. 31, 2018
Other Assets Abstract
Other assets	19. Other assets The detail of Other assets is as follows: Million of euros 2018 2017 2016 Transactions in transit 143 206 431 Net pension plan assets (Note 25) 1,015 604 521 Prepayments and accrued income 3,089 2,326 2,232 Other 4,744 4,427 3,878 8,991 7,563 7,062

Deposits from central banks and

Deposits from central banks and credit institutions	12 Months Ended
	Dec. 31, 2018
Deposits from central banks and credit institutions
Deposits from central banks and credit institutions	20. Deposits from central banks and credit institutions The detail, by classification, counterparty, type and currency, of Deposits from central banks and Deposits from credit institutions in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 CENTRAL BANKS Classification: Financial liabilities held for trading — 282 1,351 Financial liabilities designated at fair value through profit or loss 14,816 8,860 9,112 Financial liabilities at amortised cost 72,523 71,414 44,112 87,339 80,556 54,575 Type: Deposits on demand 5 5 5 Time deposits 82,797 78,801 46,278 Reverse repurchase agreements 4,537 1,750 8,292 87,339 80,556 54,575 CREDIT INSTITUTIONS Classification: Financial liabilities held for trading — 292 44 Financial liabilities designated at fair value through profit or loss 10,891 18,166 5,015 Financial liabilities at amortised cost 89,679 91,300 89,764 100,570 109,758 94,823 Type: Deposits on demand 6,154 6,444 4,220 Time deposits 53,421 54,159 61,321 Reverse repurchase agreements 40,873 49,049 29,277 Subordinated deposits 122 106 5 100,570 109,758 94,823 Currency: Euro 97,323 119,606 74,746 Pound sterling 19,301 14,820 12,237 US dollar 45,848 33,259 40,514 Brazilian real 18,657 16,485 16,537 Other currencies 6,780 6,144 5,364 TOTAL 187,909 190,314 149,398 The increase in Deposits from central banks measured at amortised cost mainly relates to the Grupo Banco Popular acquisition in 2017 and the Group’s participation in the last years in the European Central Bank's targeted longer-term refinancing operations (LTRO (Long-Term Refinancing Operation) and TLTROs (Targeted Long-Term Refinancing Operation)) which amounts to EUR 55,382 million at December 31, 2018. Note 51 contains a detail of the residual maturity periods of financial liabilities at amortised cost and of the related average interest rates.

Customer deposits

Customer deposits	12 Months Ended
	Dec. 31, 2018
Customer deposits
Customer deposits	21. Customer deposits The detail, by classification, geographical area and type, of Customer deposits is as follows: Million of euros 2018 2017 2016 Classification: Financial liabilities held for trading (*) — 28,179 9,996 Financial liabilities designated at fair value through profit or loss. 39,597 28,945 23,345 Financial liabilities at amortised cost 740,899 720,606 657,770 780,496 777,730 691,111 Geographical area: Spain 267,210 260,181 181,888 European Union (excluding Spain) 309,615 318,580 295,059 United States and Puerto Rico 53,843 50,771 63,429 Other OECD countries 67,462 62,980 62,761 Latin America (non-OECD) 82,343 84,752 87,519 Rest of the world 23 466 455 780,496 777,730 691,111 Type: Demand deposits- Current accounts 346,345 328,217 279,494 Savings accounts 196,493 189,845 180,611 Other demand deposits 5,873 7,010 7,156 Time deposits- Fixed-term deposits and other term deposits 195,540 195,285 176,581 Home-purchase savings accounts 40 45 50 Discount deposits 3 3 448 Hybrid financial liabilities 3,419 4,295 3,986 Subordinated liabilities 23 21 24 Repurchase agreements 32,760 53,009 42,761 780,496 777,730 691,111 (*) The decrease reflects the run-down of UK's trading business due to the banking reform (Ring-fencing). Note 51 contains a detail of the residual maturity periods of financial liabilities at amortised cost and of the related average interest rates.

Marketable debt securities

Marketable debt securities	12 Months Ended
	Dec. 31, 2018
Marketable Debt Securities [Abstract]
Marketable debt securities	22. Marketable debt securities a) Breakdown The detail, by classification and type, of Marketable debt securities is as follows: Million of euros 2018 2017 2016 Classification: Financial liabilities held for trading — — — Financial liabilities designated at fair value through profit or loss 2,305 3,056 2,791 Financial liabilities at amortised cost 244,314 214,910 226,078 246,619 217,966 228,869 Type: Bonds and debentures outstanding 195,498 176,719 183,278 Subordinated 23,676 21,382 19,873 Notes and other securities 27,445 19,865 25,718 246,619 217,966 228,869 The breakdown of book value by maturity of the subordinated liabilities and Bonds and debentures outstanding at December 31, 2018: Million of euros Within 1 year 1 to 3 years 3 to 5 years More than 5 years Total Subordinated Liabilities 580 129 1,341 21,626 23,676 Covered bonds 16,009 29,105 12,287 28,035 85,436 Other bonds and debentures 21,492 41,858 24,873 21,839 110,062 Total bonds and debentures outstanding 37,501 70,963 37,160 49,874 195,498 Total bonds and debentures outstanding and subordinated liabilities 38,081 71,092 38,501 71,500 219,174 Note 51 contains a detail of the residual maturity periods of financial liabilities at amortised cost and of the related average interest rates in those years. b) The detail, by currency of issue, of Bonds and debentures outstanding is as follows: December 31, 2018 Outstanding issue amount in foreign Annual Million of euros currency interest Currency of issue 2018 2017 2016 (Million) rate (%) Euro 85,479 83,321 77,231 85,479 1.25 % US dollar 62,021 48,688 48,134 71,014 3.14 % Pound sterling 16,616 13,279 15,098 14,864 2.40 % Brazilian real 15,778 17,309 27,152 70,117 5.53 % Chilean peso 6,460 5,876 6,592 5,133,310 5.00 % Other currencies 9,144 8,246 9,070 Balance at end of year 195,498 176,719 183,278 The changes in Bonds and debentures outstanding were as follows: Million of euros 2018 2017 2016 Balance at beginning of year 176,719 183,278 182,073 Net inclusion of entities in the Group — 11,426 1,009 Of which: Banco Santander, S.A. (Group Banco Popular) — 11,426 — Banca PSA Italia S.p.a. — — 500 PSA Bank Deutschland GmbH — — 497 Issues 68,306 62,260 57,012 Of which: Banco Santander (Brasil) S.A. 16,422 16,732 7,699 Santander Consumer USA Holdings Inc. 15,627 11,242 11,699 Grupo Santander UK 14,984 7,625 12,815 Banco Santander, S.A. (*) 7,683 10,712 6,385 Santander Consumer Finance, S.A. 3,605 2,508 4,567 Banco Santander - Chile. 1,483 579 3,363 Santander Consumer Bank A.S. 1,342 1,117 1,537 Santander Holdings USA, Inc. 1,210 4,133 2,798 PSA Banque France 716 1,032 — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 560 118 1,840 Santander Consumer Bank AG — 749 — PSA Financial Services Spain, EFC, SA — — 726 SCF Rahoituspalvelut KIMI VI DAC — 635 — Auto ABS French Lease Master Compartiment 2016 — — 635 Banco Santander Totta, S.A. — 1,999 — Redemptions and repurchases (48,319) (66,871) (59,036) Of which: Banco Santander (Brasil) S.A. (14,802) (23,187) (7,579) Santander Consumer USA Holdings Inc. (11,939) (10,264) (11,166) Santander Group UK (6,800) (13,303) (13,163) Banco Santander, S.A. (*) (4,752) (9,956) (12,837) Santander Consumer Finance, S.A. (2,366) (1,618) (4,117) Santander Consumer Bank AS (1,268) (337) (710) Santander Holdings USA, Inc. (903) (759) (1,786) Banca PSA Italia S.p.A. (600) — — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México (579) (224) (1,453) Santander International Products, Plc. (491) (310) (332) Banco Santander- Chile (204) (1,442) (516) Banco Santander Totta, S.A. (41) (998) (856) Santander Bank, National Association — (886) — Exchange differences and other movements (1,208) (13,374) 2,219 Balance at year-end 195,498 176,719 183,278 (*) As of December 31, 2017 and 2016, issuer entities were included. c) These notes were issued basically by Santander Consumer Finance, S.A.; Santander UK plc; Banco Santander México, S.A. Institución de Banca Múltiple, Grupo Financiero Santander México and Banco Santander, S.A. d) Set forth below is information on the liabilities secured by financial assets: Million of euros 2018 2017 2016 Asset-backed securities 38,140 32,505 38,825 Of which, mortgage-backed securities 5,197 4,034 8,561 Other mortgage securities 46,026 52,497 44,616 Of which: mortgage-backed bonds 22,023 23,907 16,965 Territorial covered bond 1,270 1,270 592 85,436 86,272 84,033 The main characteristics of the assets securing the aforementioned financial liabilities are as follows: 1. Asset-backed securities: a. Mortgage-backed securities- these securities are secured by securitised mortgage assets (see Note 10.e) with average maturities of more than ten years that must: be a first mortgage for acquisition of principal or second residence, be current in payments, have a loan-to-value ratio below 80% and have a liability insurance policy in force covering at least the appraisal value. The value of the financial liabilities broken down in the foregoing table is lower than the balance of the assets securing them - securitised assets retained on the balance sheet - mainly because the Group repurchases a portion of the bonds issued, and in such cases they are not recognised on the liability side of the consolidated balance sheet. b. Other asset - backed securities - including asset-backed securities and notes issued by special-purpose vehicles secured mainly by mortgage loans that do not meet the foregoing requirements and other loans (mainly personal loans with average maturities of five years and loans to SMEs with average maturities of seven years). 2. Other mortgage securities include mainly: (i) mortgage-backed bonds with average maturities of more than ten years that are secured by a portfolio of mortgage loans and credits (included in secured loans - see Note 10.b) which must: not be classified as of procedural stage; have available appraisals performed by specialised entities; have a loan-to-value (LTV) ratio below 80% in the case of home loans and below 60% for loans for other assets and have sufficient liability insurance, (ii) other debt securities issued as part of the Group’s liquidity strategy in the UK, mainly covered bonds in the UK secured by mortgage loans and other assets. The fair value of the guarantees received by the Group (financial and non-financial assets) which the Group is authorised to sell or pledge even if the owner of the guarantee has not defaulted is scantly material taking into account the Consolidated financial statements as a whole. e) The members of the board of directors hereby state that the Group entities operating in the Spanish mortgage-market issues area have established and implemented specific policies and procedures to cover all activities carried on and guarantee strict compliance with mortgage-market regulations applicable to these activities as provided for in Royal Decree 716/2009, of April 24 implementing certain provisions of Mortgage Market Law 2/1981, of March 25, and, by application thereof, in Bank of Spain Circulars 7/2010 and 5/2011, and other financial and mortgage system regulations. Also, financial management defines the Group entities' funding strategy. The risk policies applicable to mortgage market transactions envisage maximum loan-to-value (LTV) ratios, and specific policies are also in place adapted to each mortgage product, which occasionally require the application of stricter limits. The Bank’s general policies in this respect require the repayment capacity of each potential customer (the effort ratio in loan approval) to be analysed using specific indicators that must be met. This analysis must determine whether each customer’s income is sufficient to meet the repayments of the loan requested. In addition, the analysis of each customer must include a conclusion on the stability over time of the customer’s income considered with respect to the life of the loan. The aforementioned indicator used to measure the repayment capacity (effort ratio) of each potential customer takes into account mainly the relationship between the potential debt and the income generated, considering on the one hand the monthly repayments of the loan requested and other transactions and, on the other, the monthly salary income and duly supported income. The Group entities have specialised document comparison procedures and tools for verifying customer information and solvency (see Note 54). The Group entities’ procedures envisage that each mortgage originated in the mortgage market must be individually valued by an appraisal company not related to the Group. In accordance with Article 5 of Mortgage Market Law 41/2007, any appraisal company approved by the Bank of Spain may issue valid appraisal reports. However, as permitted by this same article, the Group entities perform several checks and select, from among these companies, a small group with which they enter into cooperation agreements with special conditions and automated control mechanisms. The Group’s internal regulations specify, in detail, each of the internally approved companies, as well as the approval requirements and procedures and the controls established to uphold them. In this connection, the regulations establish the functions of an appraisal company committee on which the various areas of the Group related to these companies are represented. The aim of the committee is to regulate and adapt the internal regulations and the activities of the appraisal companies to the current market and business situation (See note 2.i). Basically, the companies wishing to cooperate with the Group must have a significant level of activity in the mortgage market in the area in which they operate, they must pass a preliminary screening process based on criteria of independence, technical capacity and solvency -in order to ascertain the continuity of their business- and, lastly, they must pass a series of tests prior to obtaining definitive approval. In order to comply in full with the legislation, any appraisal provided by the customer is reviewed, irrespective of which appraisal company issues it, to check that the requirements, procedures and methods used to prepare it are formally adapted to the valued asset pursuant to current legislation and that the values reported are customary in the market. The information required by Bank of Spain Circulars 7/2010 and 5/2011, by application of Royal Decree 716/2009, of April 24 is as follows: 2018 2017 2016 Face value of the outstanding mortgage loans and credits that support the issuance of mortgage-backed and mortgage bonds pursuant to Royal Decree 716/2009 (excluding securitised bonds) 85,610 91,094 56,871 Of which: Loans eligible to cover issues of mortgage-backed securities 60,195 59,422 38,426 Transfers of assets retained on balance sheet: mortgage-backed certificates and other securitised mortgage assets 15,807 18,202 19,509 Mortgage-backed bonds The mortgage-backed bonds (“cédulas hipotecarias”) issued by the Group entities are securities the principal and interest of which are specifically secured by mortgages, there being no need for registration in the property register, by mortgage on all those that at any time are recorded in favour of the issuer and are not affected by the issuance of mortgage bonds and / or are subject to mortgage participations, and / or mortgage transfer certificates, and, if they exist, by substitution assets eligible to be hedged and for the economic flows generated by derivative financial instruments linked to each issue, and without prejudice to the issuer’s unlimited liability. The mortgage bonds include the credit right of its holder against the issuing entity, guaranteeing in the manner provided for in the previous paragraph, and involve the execution to claim from the issuer the payment after due date. The holders of these securities are recognised as preferred creditors, singularly privileged, with the preference, included in number 3º of article 1,923 of the Spanish Civil Code against any other creditor, in relation with the entire group of loans and mortgage loans registered in favour of the issuer, except those that act as coverage for mortgage bonds and / or are subject to mortgage participations and / or mortgage transfer certificates. In the event of insolvency, the holders of mortgage-backed bonds will enjoy the special privilege established in Article 90.1.1 of Insolvency Law 22/2003, of 9 July. Without prejudice to the foregoing, in accordance with Article 84.2.7 of the Insolvency Law, during the insolvency proceedings, the payments relating to the repayment of the principal and interest of the bonds issued and outstanding at the date of the insolvency filing will be settled up to the amount of the income received by the insolvent party from the mortgage loans and credits and, where appropriate, from the replacement assets backing the bonds and from the cash flows generated by the financial instruments associated with the issues (Final Provision 19 of the Insolvency Law). If, due to a timing mismatch, the income received by the insolvent party is insufficient to meet the payments described in the preceding paragraph, the insolvency managers must settle them by realising the replacement assets set aside to cover the issue and, if this is not sufficient, they must obtain financing to meet the mandated payments to the holders of the mortgage-backed bonds, and the finance provider must be subrogated to the position of the bond-holders. In the event that the measure indicated in Article 155.3 of the Insolvency Law were to be adopted, the payments to all holders of the mortgage-backed bonds issued would be made on a pro-rata basis, irrespective of the issue dates of the bonds. The outstanding mortgage-backed bonds issued by the Group totalled EUR 22,023 million at December 31, 2018 (all of which were denominated in euros), of which EUR 21,523 million were issued by Banco Santander, S.A. and EUR 500 million were issued by Santander Consumer Finance, S.A. The issues outstanding at December 31, 2018 and 2017 are detailed in the separate financial statements of each of these companies. Mortgage-backed bond issuers have an early redemption option solely for the purpose of complying with the limits on the volume of outstanding mortgage-backed bonds stipulated by mortgage market regulations. None of the mortgage-backed bonds issued by the Group entities had replacement assets assigned to them.

Subordinated liabilities

Subordinated liabilities	12 Months Ended
	Dec. 31, 2018
Subordinated Liabilities [Abstract]
Subordinated Liabilities	23. Subordinated liabilities a) Breakdown The detail, by currency of issue, of Subordinated liabilities in the consolidated balance sheets is as follows: Million of euros December 31, 2018 Outstanding issue amount in foreign Annual currency interest Currency of issue 2018 2017 2016 (million) rate (%) Euro 14,001 11,240 8,044 14,001 3.89 % US dollar 7,813 8,008 9,349 8,946 5.30 % Pound sterling 628 874 949 562 8.92 % Brazilian real — 131 136 — — Other currencies 1,378 1,257 1,424 Balance at end of year 23,820 21,510 19,902 Of which, preference shares 345 404 413 Of which, preference participations 9,717 8,369 6,916 Note 51 contains a detail of the residual maturity periods of subordinated liabilities at each year-end and of the related average interest rates in each year. b) The changes in Subordinated liabilities in the last three years were as follows: Million of euros 2018 2017 2016 Balance at beginning of year 21,510 19,902 21,153 Net inclusion of entities in the Group (Note 3) — 11 — Of which: Banco Santander, S.A. (Grupo Banco Popular) — 11 — Placements 3,283 2,994 2,395 Of which: Banco Santander, S.A. (*) 2,750 2,894 2,328 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 281 — 59 Santander Bank Polska S.A. 235 — — PSA Banque France — 78 — Net redemptions and repurchases (**) (1,259) (870) (2,812) Of which: Banco Santander, S.A. (*) (401) (453) (1,976) Santander UK plc (313) (60) (51) Santander Holdings USA, Inc. (195) (72) — Santander Bank, National Association (163) (285) — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México (125) — — Banco Santander (Brasil) S.A. (62) — (716) Santander Consumer Finance, S.A. — — (70) Exchange differences and other movements 286 (527) (834) Balance at end of year 23,820 21,510 19,902 (*) As of December 31, 2017 and 2016, issuer entities were included. (**) The balance relating to issuances, redemptions and repurchases (EUR 2,024 million), together with the interest paid in remuneration of these issuances including PPCC (EUR 1,245 million), is included in the cash flow from financing activities. c) This item includes the preference shares (participaciones preferentes) and other financial instruments issued by the consolidated companies which, although equity for legal purposes, do not meet the requirements for classification as equity (preference shares). The preference shares do not carry any voting rights and are non-cumulative. They were subscribed to by non-Group third parties and, except for the shares of Santander UK plc referred to below, are redeemable at the discretion of the issuer, based on the terms and conditions of each issue. At December 31, 2018, Santander UK plc had a GBP 2,041 million subordinated issue which is convertible (having acquired the Group GBP 900 million), at Santander UK plc’s option, into preference shares of Santander UK plc, at a price of GBP 1 per share. For the purposes of payment priority, preference shares (participaciones preferentes) are junior to all general creditors and to subordinated deposits. The remuneration of these securities, which have no voting rights, is conditional upon the obtainment of sufficient distributable profit and upon the limits imposed by Spanish banking regulations on equity. The other issues are subordinated and, therefore, for the purposes of payment priority, they are junior to all general creditors of the issuers. At December 31, 2018, the following issues were convertible into Bank shares: On March 5, May 8 and September 2, 2014, Banco Santander, S.A. announced that its executive committee had resolved to launch three issues of preference shares contingently convertible into newly issued ordinary shares of the Bank (“CCPSs”) for a nominal amount of EUR 1,500 million, USD 1,500 million and EUR 1,500 million, respectively. The interest on the CCPSs, payment of which is subject to certain conditions and is discretionary, was set at 6.25% per annum for the first five years (to be repriced thereafter by applying a 541 basis-point spread to the 5-year Mid-Swap Rate) for the March issue, at 6.375% per annum for the first five years (to be repriced thereafter by applying a 478.8 basis-point spread to the 5-year Mid-Swap Rate) for the May issue and at 6.25% per annum for the first seven years (to be repriced every five years thereafter by applying a 564 basis-point spread to the 5-year Mid-Swap Rate) for the September issue. On March 25, May 28, and September 30, 2014, the Bank of Spain confirmed that the CCPSs were eligible as Additional Tier 1 capital under the new European capital requirements of Regulation (EU) No 575/2013. The CCPSs are perpetual, although they may be redeemed early in certain circumstances and would convert into newly issued ordinary shares of Banco Santander if the Common Equity Tier 1 ratio of the Bank or its consolidated group fell below 5.125%, calculated in accordance with Regulation (EU) No 575/2013. The CCPSs are traded on the Global Exchange Market of the Irish Stock Exchange. Furthermore, on January 29, 2014 Banco Santander (Brasil) S.A. launched an issue of Tier 1 perpetual subordinated notes for a nominal amount of USD 1,248 million, of which the Group has acquired 89.6%. The notes are perpetual and would convert into ordinary shares of Banco Santander (Brasil) S.A. if the common equity Tier 1 ratio, calculated as established by the Central Bank of Brazil, were to fall below 5.125%. On December 30, 2016, Grupo Financiero Santander México, S.A.B. of C.V. made an issue of perpetual subordinated notes for a nominal amount of USD 500 million of which the Group has acquired 88.2%. Perpetual obligations are automatically converted into shares when the Regulatory Capital Index (CET1) is equal to or less than 5.125% at the conversion price. On April 25, and September 29, 2017, Banco Santander, S.A. issued preferred shares contingently convertible in newly issued common shares of the Bank (the “CCPP”), for a nominal amount of 750 million euros, and 1,000 million euros, respectively. The remuneration of the CCPPs, whose payment is subject to certain conditions and is also discretionary, was fixed at 6.75% annually for the first five years (being reviewed thereafter by applying a margin of 680.3 basis points over the 5-year Mid-Swap Rate) for the issue paid out in April, and at 5.25% annually for the first six years (reviewed thereafter by applying a margin of 499.9 basis points over the 5-year Mid-Swap Rate) for the issue paid out in September. On February 8, 2018, Banco Santander, S.A. carried out an issue of subordinated obligations for a term of ten years, amounting to EUR1,250 million. The issue accrues an annual interest of 2.125% payable annually. On March 19, 2018, Banco Santander, S.A. carried out an issue of contingently convertible preferred shares in common shares of the newly issued Bank (the "PPCC"), for a nominal amount of EUR 1,500 million. The remuneration of the CCPPs, whose payment is subject to certain conditions and is also discretionary, was fixed at an annual 4.75%, payable quarterly, for the first seven years (being revised thereafter applying a margin of 410 basis points over the type Mid-swap). On April 20, 2018, Santander Bank Polska S.A. carried out an issue of subordinated obligations for a term of ten years and with an option to amortize the fifth anniversary of the issue date, for an amount of EUR 1,000 million Polish zlotys. The issue accrues a floating interest of Wibor (6M) + 160 basic points payable semiannually. On October 1, 2018, Banco Santander México, S.A ., Institución de Banca Múltiple, Grupo Financiero Santander México it issued a subordinated debt for a term of ten years for a nominal amount of 1,300 million US dollars and at an interest rate of 5.95%, the group having acquired 75% of the issue. The accrued interests from the subordinated liabilities during 2018 amounted to EUR 770 million (EUR 966 million and EUR 945 million during 2017 and 2016, respectively). Interests from the “CCPS” during 2018 amounted to EUR 560 million (EUR 395 million and EUR 334 million in 2017 and 2016, respectively).

Other financial liabilities

Other financial liabilities	12 Months Ended
	Dec. 31, 2018
Other Financial Liabilities [Abstract]
Other Financial Liabilities	24. Other financial liabilities The detail of Other financial liabilities in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 Trade payables 1,323 1,559 1,230 Clearing houses 434 767 676 Tax collection accounts: Public Institutions 3,968 3,212 2,790 Factoring accounts payable 263 290 180 Unsettled financial transactions 3,373 6,375 7,418 Other financial liabilities 15,303 16,225 14,222 24,664 28,428 26,516 Note 51 contains a detail of the residual maturity periods of other financial liabilities at each year-end.

Provisions

Provisions	12 Months Ended
	Dec. 31, 2018
Provisions.
Provisions	25. Provisions a) Breakdown The detail of Provisions in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 Provision for pensions and other obligations post-employments 5,558 6,345 6,576 Other long term employee benefits 1,239 1,686 1,712 Provisions for taxes and other legal contingencies 3,174 3,181 2,994 Provisions for contingent liabilities and commitments (Note 2) 779 617 459 Other provisions 2,475 2,660 2,718 Provisions 13,225 14,489 14,459 b) The changes in Provisions in the last three years were as follows: Million of euros 2018 2017 2016 Provisions Provisions Provisions Provisions Provisions Provisions Provisions for other for Provisions for other for Provisions for other for for post- long term contingent for post- long term commitments for post- long term commitments employment employee liabilities and Other employment employee and guarantees Other employment employee and guarantees Other plans benefits commitments (*) provisions Total plans benefits given provisions Total plans benefits given provisions Total Balances at beginning of year 6,345 1,686 814 5,841 14,686 6,576 1,712 459 5,712 14,459 6,356 1,916 618 5,604 14,494 Incorporation of Group companies, net — — — (30) (30) 59 184 146 1,365 1,754 11 8 (4) 13 28 Additions charged to income: 38 251 (49) 2,253 2,493 237 293 (49) 2,863 3,344 227 368 (40) 2,235 2,790 Interest expense(Note 39) 165 21 — — 186 175 23 — — 198 170 31 — — 201 Personnel expenses (Note 47) 78 6 — — 84 82 6 — — 88 73 8 — — 81 Provisions or reversion of provisions (205) 224 (49) 2,253 2,223 (20) 264 (49) 2,863 3,058 (16) 329 (40) 2,235 2,508 Addition 7 227 455 4,612 5,301 2 264 606 3,855 4,727 24 377 226 3,024 3,651 Release (212) (3) (504) (2,359) (3,078) (22) — (655) (992) (1,669) (40) (48) (266) (789) (1,143) Other additions arising from insurance contracts linked to pensions (7) — — — (7) (7) — — — (7) (3) — — — (3) Changes in value recognised in equity (482) — — — (482) 369 — — — 369 1,275 — — — 1,275 Payments to pensioners and pre-retirees with a charge to internal provisions (332) (625) — — (957) (355) (498) — — (853) (367) (603) — — (970) Benefits paid due to settlements — — — — — (260) — — — (260) (20) — — — (20) Insurance premiums paid (2) — — — (2) — — — — — (1) — — — (1) Payments to external funds (368) — — — (368) (273) — — — (273) (852) — — — (852) Amounts used — — (3) (2,548) (2,551) — — (3) (2,997) (3,000) — — (2) (2,149) (2,151) Transfer, exchange differences and other changes 366 (73) 17 133 443 (1) (5) 64 (1,102) (1,044) (50) 23 (113) 9 (131) Balances at end of year 5,558 1,239 779 5,649 13,225 6,345 1,686 617 5,841 14,489 6,576 1,712 459 5,712 14,459 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). c) Provision for pensions and other obligations post –employments and Other long term employee benefits The detail of Provisions for pensions and similar obligations is as follows: Million of euros 2018 2017 2016 Provisions for post-employment plans - Spanish entities 3,930 4,274 4,701 Provisions for other similar obligations - Spanish entities 1,189 1,643 1,664 Of which: pre-retirements 1,172 1,630 1,644 Provisions for post-employment plans - United Kingdom 130 323 306 Provisions for post-employment plans - Other subsidiaries 1,498 1,748 1,569 Provisions for other similar obligations - Other subsidiaries 50 43 48 Provision for pensions and other obligations post -employments and Other long term employee benefits 6,797 8,031 8,288 Of which: defined benefits 6,791 8,026 8,277 i. At December 31, 2018, 2017 and 2016, the Spanish entities had post-employment benefit obligations under defined contribution and defined benefit plans. In addition, in various years some of the consolidated entities offered certain of their employees the possibility of taking pre-retirement and, therefore, provisions are recognised each year for the obligations to employees taking pre-retirement -in terms of salaries and other employee benefit costs- from the date of their pre-retirement to the agreed end date. In 2017, in parallel and simultaneously, Banco Santander and Banco Popular Español, S.A.U. reached an agreement with the workers’ representatives to implement a pre-retirement and incentivised retirement plan, which welcomed 1,715 employees during 2018, being the provision set up to cover these commitments of EUR 209 million . In 2017 and 2016 the provisions accounted for benefit plans and contribution commitments were EUR 248 and 361 million in 2017 and 2016, respectively. In October 2017, the Bank and the workers’ representatives reached an agreement for the elimination and compensation of certain passive rights arising from extra-covenant improvement agreements. The effect of the settlement of the mentioned commitments is shown in the tables included below in the "benefit paid for settlement" line. The expenses incurred by the Spanish companies in respect of contributions to defined contribution plans amounted to EUR 87 million in 2018 (2017: EUR 90 million; 2016: EUR 93 million). The amount of the defined benefit obligations was determined on the basis of the work performed by independent actuaries using the following actuarial techniques: 1. Valuation method: projected unit credit method, which sees each period of service as giving rise to an additional unit of benefit entitlement and measures each unit separately. 2. Actuarial assumptions used: unbiased and mutually compatible. Specifically, the most significant actuarial assumptions used in the calculations were as follows: Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Annual discount rate 1.55% 1.40% and 1.38% B. Popular 1.50% 1.55% 1.40% 1.50% Mortality tables PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 Cumulative annual CPI growth 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% Annual salary increase rate 2.0%(*) B. Popular 1.75% in 2018 and Rest 2.00% (*) N/A N/A N/A Annual social security pension increase rate 1.00% 1.00% 1.00% N/A N/A N/A Annual benefit increase rate N/A N/A N/A From 0% to 1.50% From 0% to 1.50% From 0% to 1.50% (*) Corresponds to the Group’s defined-benefit obligations. The discount rate used for the flows was determined by reference to high-quality corporate bonds (at least AA in euros) with terms consistent with those of the obligations. Any changes in the main assumptions could affect the calculation of the obligations. At December 31, 2018, if the discount rate used had been decreased or increased by 50 basis points, there would have been an increase or decrease in the present value of the post-employment obligations of +5.33% (-50 b.p) to -4.88% (+50 b.p.),respectively, and an increase or decrease in the present value of the long-term obligations of +1.11% (-50 b.p.) to -1.09% (+50 b.p.), respectively. These changes would be offset in part by increases or decreases in the fair value of the assets and insurance contracts linked to pensions. 3. The estimated retirement age of each employee is the first at which the employee is entitled to retire or the agreed-upon age, as appropriate. The fair value of insurance contracts was determined as the present value of the related payment obligations, taking into account the following assumptions: Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Expected rate of return on plan assets 1.55 % 1.40 % 1.50 % 1.55 % 1.40 % N/A Expected rate of return on reimbursement rights 1.55 % 1.40 % 1.50 % N/A N/A N/A The funding status of the defined benefit obligations in 2018 and the four preceding years is as follows: Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2015 2014 2018 2017 2016 2015 2014 Present value of the obligations: To current employees 60 138 50 48 62 — — — — — Vested obligations to retired employees 5,332 5,662 4,423 4,551 4,708 — — — — — To pre-retirees employees — — — — — 1,187 1,647 1,644 1,801 2,220 Long-service bonuses and other benefits — — — — — 17 13 13 12 13 Other 35 112 383 380 307 — — — — 4 5,427 5,912 4,856 4,979 5,077 1,204 1,660 1,657 1,813 2,237 Less - Fair value of plan assets 1,500 1,640 157 157 167 15 17 — — — Provisions - Provisions for pensions 3,927 4,272 4,699 4,822 4,910 1,189 1,643 1,657 1,813 2,237 Of which: Internal provisions for pensions 3,720 4,036 4,432 4,524 4,565 1,189 1,642 1,657 1,813 2,237 Insurance contracts linked to pensions (Note 14) 210 238 269 299 345 — 1 — — — Unrecognised net assets for pensions (3) (2) (2) (1) — — — — — — The amounts recognised in the consolidated income statements in relation to the aforementioned defined benefit obligations are as follows: Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Current service cost 18 16 11 1 1 1 Interest cost (net) 73 79 91 18 21 27 Expected return on insurance contracts linked to pensions (4) (4) (5) — — — Provisions or reversion of provisions Actuarial (gains)/losses recognised in the year — — — 7 13 6 Past service cost 3 — 6 5 — — Pre-retirement cost 1 — 6 208 248 355 Other (4) (2) (21) — — (1) 87 89 88 239 283 388 In addition, in 2018 Other comprehensive income – Items not reclassified to profit or loss – Actuarial gains or (-) losses on defined benefit pension plans decreased by EUR 65 million with respect to defined benefit obligations (increased 2017: EUR 41 million; increased 2016: EUR 141 million). The changes in the present value of the accrued defined benefit obligations were as follows: Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Present value of the obligations at beginning of year 5,912 4,856 4,979 1,660 1,657 1,813 Incorporation of Group companies, net (36) 1,563 — — 202 — Current service cost 18 16 11 1 1 1 Interest cost 99 94 95 18 21 27 Pre-retirement cost 1 — 6 208 248 355 Effect of curtailment/settlement (4) (2) (21) — — — Benefits paid (423) (388) (353) (617) (490) (570) Benefits paid due to settlements — (260) — — — — Past service cost 3 — 6 5 — — Actuarial (gains)/losses (145) 57 136 6 13 6 Demographic actuarial (gains)/losses (21) (7) 15 (3) 10 (1) Financial actuarial (gains)/losses (124) 64 121 9 3 7 Exchange differences and other items 2 (24) (3) (77) 8 25 Present value of the obligations at end of year 5,427 5,912 4,856 1,204 1,660 1,657 The changes in the fair value of plan assets and of insurance contracts linked to pensions were as follows: Plan assets Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Fair value of plan assets at beginning of year 1,640 157 157 17 — — Incorporation of Group companies, net — 1,507 — — 18 — Expected return on plan assets 26 15 4 — — — Benefits paid (115) (58) (8) (2) (1) — Contributions/(surrenders) 21 3 9 — — — Actuarial gains/(losses) (73) 24 (2) (1) — — Exchange differences and other items 1 (8) (3) 1 — — Fair value of plan assets at end of year 1,500 1,640 157 15 17 — Insurance contracts linked to pensions Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Fair value of insurance contracts linked to pensions at beginning of year 238 269 299 1 — — Incorporation of Group companies, net — — — — 2 — Expected return on insurance contracts linked to pensions 4 4 5 — — — Benefits paid (27) (29) (32) (1) (1) — Paid premiums 2 1 — — — — Actuarial gains/(losses) (7) (7) (3) — — — Fair value of insurance contracts linked to pensions at end of year 210 238 269 — 1 — In view of the conversion of the defined-benefit obligations to defined-contribution obligations, the Group has not made material current contributions in Spain in 2018 to fund its defined-benefit pension obligations. The plan assets and the insurance contracts linked to pensions are instrumented mainly through insurance policies. The following table shows the estimated benefits payable at December 31, 2018 for the next ten years: Million of euros 2019 792 2020 662 2021 569 2022 486 2023 425 2024 to 2028 1,604 ii. At the end of each of the last three years, the businesses in the United Kingdom had post-employment benefit obligations under defined contribution and defined benefit plans. The expenses incurred in respect of contributions to defined contribution plans amounted to EUR 93 million in 2018 (2017: EUR 82 million; 2016: EUR 81 million). The amount of the defined benefit obligations was determined on the basis of the work performed by independent actuaries using the following actuarial techniques: 1. Valuation method: projected unit credit method, which sees each period of service as giving rise to an additional unit of benefit entitlement and measures each unit separately. 2. Actuarial assumptions used: unbiased and mutually compatible. Specifically, the most significant actuarial assumptions used in the calculations were as follows: 2018 2017 2016 Annual discount rate 2.90 % 2.49 % 2.79 % Mortality tables 108/86 S2 Light 108/86 S2 Light 116/98 S1 Light TMC Cumulative annual CPI growth 3.22 % 3.15 % 3.12 % Annual salary increase rate 1.00 % 1.00 % 1.00 % Annual pension increase rate 2.94 % 2.94 % 2.92 % The discount rate used for the flows was determined by reference to high-quality corporate bonds (at least AA in pounds sterling) that coincide with the terms of the obligations. Any changes in the main assumptions could affect the calculation of the obligations. At December 31, 2018, if the discount rate used had been decreased or increased by 50 basis points, there would have been an increase or decrease in the present value of the obligations of +9.80% (-50 b.p.) and -8.74% (+50 b.p.), respectively.If the inflation assumption had been increased or decreased by 50 basis points, there would have been an increase or decrease in the present value of the obligations of + 6.57% (+50 b.p.) and -6.31% (-50 b.p.), respectively. These changes would be offset in part by increases or decreases in the fair value of the assets. The funding status of the defined benefit obligations in 2018 and the four preceding years is as follows: Million of euros 2018 2017 2016 2015 2014 Present value of the obligations 12,079 13,056 12,955 12,271 11,959 Less- Fair value of plan assets 12,887 13,239 13,118 12,880 12,108 Provisions - Provisions for pensions (808) (183) (163) (609) (149) Of which: Internal provisions for pensions 130 323 306 150 256 Net assets for pensions (938) (506) (469) (759) (405) The amounts recognised in the consolidated income statements in relation to the aforementioned defined benefit obligations are as follows: Million of euros 2018 2017 2016 Current service cost 31 36 31 Interest cost (net) (6) (6) (22) 25 30 9 In addition, in 2018 Other comprehensive income – Items not reclassified to profit or loss – Actuarial gains or (-) losses on defined benefit pension plans decreased by EUR 481 million with respect to defined benefit obligations (2017: increase of EUR 121 million; 2016: increase of EUR 621 million). The changes in the present value of the accrued defined benefit obligations were as follows: Million of euros 2018 2017 2016 Present value of the obligations at beginning of year 13,056 12,955 12,271 Current service cost 31 36 31 Interest cost 320 347 407 Benefits paid (489) (445) (332) Contributions made by employees 24 20 20 Past service cost — — — Actuarial (gains)/losses (766) 602 2,315 Demographic actuarial (gains)/losses (21) (184) (59) Financial actuarial (gains)/losses (745) 786 2,374 Exchange differences and other items (97) (459) (1,757) Present value of the obligations at end of year 12,079 13,056 12,955 The changes in the fair value of the plan assets were as follows: Million of euros 2018 2017 2016 Fair value of plan assets at beginning of year 13,239 13,118 12,880 Expected return on plan assets 326 353 429 Benefits paid (489) (445) (332) Contributions 209 208 304 Actuarial gains/(losses) (285) 481 1,694 Exchange differences and other items (113) (476) (1,857) Fair value of plan assets at end of year 12,887 13,239 13,118 In 2019 the Group expects to make current contributions to fund these obligations for amounts similar to those made in 2018. The main categories of plan assets as a percentage of total plan assets are as follows: 2018 2017 2016 Equity instruments 17 % 20 % 25 % Debt instruments 50 % 46 % 49 % Properties 10 % 13 % 12 % Other 23 % 21 % 14 % The following table shows the estimated benefits payable at December 31, 2018 for the next ten years: Million of euros 2019 297 2020 301 2021 321 2022 345 2023 363 2024 to 2028 2,127 iii. Other foreign subsidiaries Certain of the consolidated foreign entities have acquired commitments to their employees similar to post-employment benefits. At December 31, 2018, 2017 and 2016, these entities had defined-contribution and defined-benefit post-employment benefit obligations. The expenses incurred in respect of contributions to defined contribution plans amounted to EUR 107 million in 2018 (2017: EUR 99 million; 2016: EUR 92 million). The actuarial assumptions used by these entities (discount rates, mortality tables and cumulative annual CPI growth) are consistent with the economic and social conditions prevailing in the countries in which they are located. Specifically, the discount rate used for the flows was determined by reference to high-quality corporate bonds, except in the case of Brazil where there is no extensive corporate bond market and, accordingly the discount rate was determined by reference to the series B bonds issued by the Brazilian National Treasury Secretariat for a term coinciding with that of the obligations. In Brazil the discount rate used was between 9.11% and 9.26%, the CPI 4% and the mortality table the AT-2000. Any changes in the main assumptions could affect the calculation of the obligations. At December 31, 2018, if the discount rate used had been decreased or increased by 50 basis points, there would have been an increase or decrease in the present value of the obligations of + 5.25% (-50 b.p.) and -4.80% (+50 b.p.), respectively.These changes would be offset in part by increases or decreases in the fair value of the assets. The funding status of the obligations similar to post-employment benefits and other long-term benefits in 2018 and the four preceding years is as follows: Million of euros Of which: business in 2018 Brazil 2017 2016 2015 2014 Present value of the obligations 9,116 6,649 9,534 9,876 8,337 10,324 Less- Of which: with a charge to the participants 167 167 193 153 133 151 Fair value of plan assets 7,743 6,046 7,927 8,445 7,008 8,458 Provisions - Provisions for pensions 1,206 436 1,414 1,278 1,196 1,715 Of which: Internal provisions for pensions 1,541 756 1,787 1,613 1,478 1,999 Net assets for pensions (77) (62) (98) (52) (28) (8) Unrecognised net assets for pensions (258) (258) (275) (283) (254) (276) The amounts recognised in the consolidated income statements in relation to these obligations are as follows: Million of euros 2018 2017 2016 Current service cost 34 35 38 Interest cost (net) 101 104 105 Provisions or reversion of provisions Actuarial (gains)/losses recognised in the year 5 1 (9) Past service cost 3 3 18 Pre-retirement cost (6) — (9) Other (19) (37) (66) 124 106 In addition, in 2018 Other comprehensive income – Items not reclassified to profit or loss – Actuarial gains or (-) losses on defined benefit pension plans increased by EUR 64 million with respect to defined benefit obligations (increased EUR 207 million and increased EUR 513 million in 2017 and 2016, respectively). In December 2011, the financial entities of Portugal, including Banco Santander Totta, S.A. made a partial transfer of the pension commitments to the Social Security. Consequently, Banco Santander Totta, S.A. carried out the transfer of the corresponding assets and liabilities and the current value of the net commitments of the fair value of the corresponding assets of the plan, as of December 31, 2011, under Provisions - Funds for pensions and similar obligations. In 2016, the collective bargaining agreement of the banking sector was approved, consolidating the sharing of responsibility for the pension commitments between the State and the banks. On the other hand, in 2016 the Group in Brazil updated the recognition of its obligations of certain health benefits in the terms stipulated in the regulation that develops them and that establishes the coverage of this benefit in equal proportion between the sponsor and partners. The effect of this liquidation, together with that of the businesses in Portugal, is shown in the following tables under the heading “benefits paid due to settlements”. In June 2018, the Group in Brazil reached an agreement with the labour unions to modify the scheme of contributions to certain health benefits, which implied a reduction in commitments amounting to 186 million euros, shown in the following tables under the heading "Effect to curtailment/settlement". The changes in the present value of the accrued obligations were as follows: Million of euros 2018 2017 2016 Present value of the obligations at beginning of year 9,534 9,876 8,337 Incorporation of Group companies, net 36 165 171 Current service cost 34 35 38 Interest cost 646 807 802 Pre-retirement cost (6) — (9) Effect of curtailment/settlement (199) (19) (37) Benefits paid (634) (716) (690) Benefits paid due to settlements — (24) (1,352) Contributions made by employees 5 6 8 Past service cost 3 3 18 Actuarial (gains)/losses 390 404 1,269 Demographic actuarial (gains)/losses (59) (140) 439 Financial actuarial (gains)/losses 449 544 830 Exchange differences and other items (693) (1,003) 1,321 Present value of the obligations at end of year 9,116 9,534 9,876 The changes in the fair value of the plan assets were as follows: Million of euros 2018 2017 2016 Fair value of plan assets at beginning of year 7,927 8,445 7,008 Incorporation of Group companies, net — 166 154 Expected return on plan assets 573 732 732 Benefits paid (602) (683) (637) Benefits paid due to settlements — (24) (1,328) Contributions 199 94 559 Liquidation gains/(losses) — — — Actuarial gains/(losses) 308 203 687 Exchange differences and other items (662) (1,006) 1,270 Fair value of plan assets at end of year 7,743 7,927 8,445 In 2019 the Group expects to make contributions to fund these obligations for amounts similar to those made in 2018. The main categories of plan assets as a percentage of total plan assets are as follows: 2018 2017 2016 Equity instruments 7 % 6 % 7 % Debt instruments 83 % 84 % 88 % Properties 1 % 3 % 1 % Other 9 % 7 % 4 % The following table shows the estimated benefits payable at December 31, 2018 for the next ten years: Million of euros 2019 593 2020 603 2021 612 2022 629 2023 644 2024 to 2028 3,429 d) Provisions - Provisions for taxes and other legal contingencies and Provisions - Other provisions, which include, inter alia, provisions for restructuring costs and tax-related and non-tax-related proceedings, were estimated using prudent calculation procedures in keeping with the uncertainty inherent to the obligations covered. The definitive date of the outflow of resources embodying economic benefits for the Group depends on each obligation. In certain cases, these obligations have no fixed settlement period and, in other cases, depend on the legal proceedings in progress. The detail, by geographical area, of Provisions for taxes and other legal contingencies and Other provisions is as follows: Million of euros 2018 2017 2016 Recognised by Spanish companies 1,647 1,666 1,148 Recognised by other EU companies 1,044 1,127 1,300 Recognised by other companies 2,958 3,048 3,264 Of which: Brazil 2,496 2,504 2,715 5,649 5,841 5,712 Set forth below is the detail, by type of provision, of the balance at December 31, 2018, 2017 and 2016 of Provisions for taxes and other legal contingencies and Other provisions. The types of provision were determined by grouping together items of a similar nature: Million of euros 2018 2017 2016 Provisions for taxes 864 1,006 1,074 Provisions for employment-related proceedings (Brazil) 859 868 915 Provisions for other legal proceedings 1,451 1,307 1,005 Provision for customer remediation 652 885 685 Regulatory framework-related provisions 105 101 253 Provision for restructuring 492 360 472 Other 1,226 1,314 1,308 5,649 5,841 5,712 Relevant information is set forth below in relation to each type of provision shown in the preceding table: The provisions for taxes include provisions for tax-related proceedings. The provisions for employment-related proceedings (Brazil) relate to claims filed by trade unions, associations, the prosecutor’s office and ex-employees claiming employment rights to which, in their view, they are entitled, particularly the payment of overtime and other employment rights, including litigation concerning retirement benefits. The number and nature of these proceedings, which are common for banks in Brazil, justify the classification of these provisions in a separate category or as a separate type from the rest. The Group calculates the provisions associated with these claims in accordance with past experience of payments made in relation to claims for similar items. When claims do not fall within these categories, a case-by-case assessment is performed and the amount of the provision is calculated in accordance with the status of each proceeding and the risk assessment carried out by the legal advisers. The provisions for other legal proceedings include provisions for court, arbitration or administrative proceedings (other than those included in other categories or types of provisions disclosed separately) brought against Santander Group companies. The provisions for customer remediation include mainly the estimated cost of payments to remedy errors relating to the sale of certain products in the UK and the estimated amount related to the floor clauses of Banco Popular Español, S.A.U. To calculate the provision for customer remediation, the best estimate of the provision made by management is used, which is based on the estimated number of claims to be received and, of these, the number that will be accepted, as well as the estimated average payment per case. The regulatory framework-related provisions include mainly the provisions relating to the FSCS (Financial Services Compensation Scheme), the Bank Levy in the UK and in Poland the provision related to the Banking Tax. The provisions for restructuring include only the costs arising from restructuring processes carried out by the various Group companies. Qualitative information on the main litigation is provided in Note 25.e to the consolidated financial statements. Our general policy is to record provisions for tax and legal proceedings in which we assess the chances of loss to be probable and we do not record provisions when the chances of loss are possible or remote. We determine the amounts to be provided for as our best estimate of the expenditure required to settle the corresponding claim based, among other factors, on a case-by-case analysis of the facts and the legal opinion of internal and external counsel or by considering the historical average amount of the loss incurred in claims of the same nature. The definitive date of the outflow of resources embodying economic benefits for the Group depends on each obligation. In certain cases, the obligations do not have a fixed settlement term and, in others, they depend on legal proceedings in progress. The main movements during the 2018 of the breakdown provisions are shown below: Regarding the provisions arising from civil contingencies and legal nature, Brazil provides in the period EUR 359 million (2017: EUR 355 million, 2016: EUR 201 million) due to civil contingencies and EUR 288 million (2017: EUR 505 million, 2016:EUR 395 million) arising from employment related claims. This increase was partially offset by the use of available provisions of which EUR 299 million (2017: EUR 388 million, 2016:EUR 284 million) were related to payments of employment-related claims and EUR 191 million (2017: EUR 203 million, 2016: EUR 239 million) due to civil contingencies. Regarding the provisions arising for customer remediation, EUR 16 million (2017: EUR 164 million, 2016: EUR 179 million) are released, and EUR 128 million (2017: EUR 106 million, 2016: EUR 173 million) are used in United Kingdom. On the other hand, in Banco Popular. S.A.U., an amount of EUR 119 million (2017: EUR 223 million) has been used in the year from floor clauses. Regarding the provisions constituted by regulatory framework, EUR 73 million have been charged (2017: EUR 106 million; 2016: EUR 173 million) and EUR 88 million have been used during 2018 (2017: EUR 151 million; 2016: EUR 169 million) in United Kingdom (Bank Levy and FSCS). In addition, EUR 100 million have been provisioned and paid in Poland. Regarding the provisions for restructuring process, a further provision of EUR 290 million (2017: EUR 425 million; 2016: EUR 244 million) was registered in Spain. This increase was partially offset by the use of EUR 179 million (2017: EUR 162 million ; 2016: EUR 206 million). e) Litigation and other matters i. Tax-related litigation At December 31, 2018 the main tax-related proceedings concerning the Group were as follows: - Legal actions filed by Banco Santander (Brasil) S.A. and certain Group companies in Brazil challenging the increase in the rate of Brazilian social contribution tax on net income from 9% to 15% stipulated by Interim Measure 413/2008, ratified by Law 11.727/2008, a provision having been recognised for the amount of the estimated loss. Due to recent unfavourable decisions of the courts, the Group in Brazil has withdrawn their actions and paid the amount claimed, using the existing provision. - Legal actions filed by Banco Santander (Brasil) S.A. and other Group entities to avoid the application of Law 9.718/98, which modifies the basis to calculate PIS and COFINS social contribution, extending it to all the entities income, and not only to the income from the provision of services. In relation of Banco Santander (Brasil) S.A. process, in May 2015 the Federal Supreme Court (FSC) admitted the extraordinary appeal filed by the Federal Union regarding PIS, and dismissed the extraordinary appeal lodged by the Brazilian Public Prosecutor's Office regarding COFINS contribution, confirming the decision of Federal Regional Court favourable to Banco Santander (Brasil) S.A. The appeals filed by the other entities before the Federal Supreme Court, both for PIS and COFINS, are still pending. The risk is classified as possible and there is a provision for the amount of the estimated loss. - Banco Santander (Brasil) S.A. and other Group companies in Brazil have appealed against the assessments issued by the Brazilian tax authorities questioning the deduction of loan losses in their income tax returns (IRPJ and CSLL) in relation to different administrative processes of various years on the ground that the requirements under the applicable legislation were not met. The appeals are pending decision in CARF. No provision was recognised in connection with the amount considered to be a contingent liability. - Banco Santander (Brasil) S.A. and other Group companies in Brazil are involved in administrative and legal proceedings against several municipalities that demand payment of the Service Tax on certain items of income from transactions not classified as provisions of services. There are several cases in different judicial instances. No provision was recognised in connection with the amount considered to be a contingent liability." - Banco Santander (Brasil) S.A. and other Group companies in Brazil are involved in administrative and legal proceedings against the tax authorities in connection with the taxation for social security purposes of certain items which are not considered to be employee remuneration. There are several cases in different judicial instances. A provision was recognised in connection with the amount of the estimated loss. - In May 2003 the Brazilian tax authorities issued separate infringement notices against Santander Distribuidora de Títulos e Valores Mobiliarios Ltda. (DTVM, currently Santander Brasil Tecnologia S.A.) and Banco Santander (Brasil) S.A. in relation to the Provisional Tax on Financial Movements (CPMF) of the years 2000, 2001 and part of 2002. In July 2015, after the unfavourable decision of CARF, both entities appealed at Federal Justice in a single proceeding. There is a provision recognised for the estimated loss. - In December 2010 the Brazilian tax authorities issued an infringement

Other liabilities

Other liabilities	12 Months Ended
	Dec. 31, 2018
Miscellaneous liabilities [abstract]
Other Liabilities	26. Other liabilities The detail of Other liabilities in the consolidated balance sheets is as follows: Million of euros 2018 2017 2016 Transactions in transit 803 811 994 Accrued expenses and deferred income 6,621 6,790 6,507 Other 5,664 4,990 3,569 13,088 12,591 11,070

Tax matters

Tax matters	12 Months Ended
	Dec. 31, 2018
Tax matters
Tax matters	27. Tax matters a) Pursuant to current legislation, the Consolidated Tax Group includes Banco Santander, S.A. (as the parent) and the Spanish subsidiaries that meet the requirements provided for in Spanish legislation regulating the taxation of the consolidated profits of corporate groups (as the controlled entities). On January 1, 2018 those entities that were part of the Consolidated Tax Group which parent company was Banco Popular Español, S.A.U., and that meet the requirements have been integrated in the aforementioned Consolidate Tax Group. The other Group companies file income tax returns in accordance with the tax regulations applicable to them. b) In 2018 the conformity and non-conformity acts relating to the financial years 2009 to 2011 were formalised. The adjustments signed in conformity had no significant impact on results and, in relation to the concepts signed in disconformity both in this year and in previous years that have been appealed, Banco Santander, S.A., as the Parent of the Consolidated Tax Group, considers, in accordance with the advice of its external lawyers, that the adjustments made should not have a significant impact on the consolidated financial statements, and there are sound arguments as proof in the appeals pending or to be filed against them. Consequently, no provision has been recorded for this concept. Following the completion of these actions for 2009 to 2011, subsequent years up to and including 2018 are subject to review. At the date of approval of these accounts, the beginning of VAT proceedings for periods not yet prescribed up to and including 2016 have been notified. Likewise, in 2018 the partial actions relating to corporate income tax for 2016 of the Consolidated Tax Group of which Banco Popular Español, S.A. U. was the parent were completed, and a certificate of conformity was drawn up confirming the tax return filed by the taxpayer. In relation to this Consolidated Tax Group, the years 2010 to 2017 inclusive are subject to review. The other entities have the corresponding years open for review, pursuant to their respective tax regulations. Because of the possible different interpretations which can be made of the tax regulations, the outcome of the tax audits of the years reviewed and of the open years might give rise to contingent tax liabilities which cannot be objectively quantified. However, the Group’s tax advisers consider that it is unlikely that such tax liabilities will arise, and that in any event the tax charge arising therefrom would not materially affect the Group’s consolidated financial statements. c) The reconciliation of the income tax expense calculated at the tax rate applicable in Spain (30%) to the income tax expense recognised and the detail of the effective tax rate are as follows: Million of euros 2018 2017 2016 Consolidated profit (loss) before tax: From continuing operations 14,201 12,091 10,768 From discontinued operations — — — 14,201 12,091 10,768 Income tax at tax rate applicable in Spain (30%) 4,260 3,628 3,230 By the effect of application of the various tax rates applicable in each country (*) 509 539 312 Of which: Brazil 719 656 396 United Kingdom (99) (78) (63) United States (57) 68 94 Chile (35) (48) (54) Effect of profit or loss of associates and joint ventures (221) (211) (133) Effect of deduction of goodwill in Brazil — (164) (184) Effect of reassessment of deferred taxes — (282) (20) Permanent differences (**) 338 374 77 Current income tax 4,886 3,884 3,282 Effective tax rate 34.40 % 32.12 % 30.48 % Of which: Continuing operations 4,886 3,884 3,282 Discontinued operations (Note 37) — — — Of which: Current taxes 4,763 3,777 1,493 Deferred taxes 123 107 1,789 Taxes paid in the year 3,342 4,137 2,872 (*) (**) d) In addition to the income tax recognised in the consolidated income statement, the Group recognised the following amounts in consolidated equity in 2018, 2017 and 2016: Million of euros 2018 (*) 2017 2016 Other comprehensive income Items not reclassified to profit or loss (225) 60 364 Actuarial gains or (-) losses on defined benefit pension plans (199) 60 364 Changes in the fair value of equity instruments measured at fair value through other comprehensive income — — Financial liabilities at fair value with changes in results attributed to changes in credit risk (26) — Items that may be reclassified to profit or loss 124 — (694) Cash flow hedges (50) 108 (136) Changes in the fair value of debt instruments through other comprehensive income 167 — Financial assets available for sale — (97) (552) Debt instruments — (366) (368) Equity instruments — 269 (184) Other recognised income and expense of investments in subsidiaries, joint ventures and associates 7 (11) (6) Total (101) 60 (330) (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). e) Tax assets in the consolidated balance sheets includes debit balances with the Public Treasury relating to deferred tax assets. Tax liabilities includes the liability for the Group’s various deferred tax liabilities. On June 26, 2013, the Basel III legal framework was included in European law through Directive 2013/36 (CRD IV) and Regulation 575/2013 on prudential requirements for credit institutions and investment firms (CRR), directly applicable in every member state as from January 1, 2014, albeit with a gradual timetable with respect to the application of, and compliance with, various requirements. This legislation establishes that deferred tax assets, the use of which relies on future profits being obtained, must be deducted from regulatory capital. In this regard, pursuant to Basel III, in recent years several countries have amended their tax regimes with respect to certain deferred tax assets so that they may continue to be considered regulatory capital since their use does not rely on the future profits of the entities that generate them (referred to hereinafter as “monetizable tax assets”). Italy had a very similar regime to that described above, which was introduced by Decree-Law no. 225, of December 29, 2010, and amended by Law no. 10, of February 26, 2011. In addition, in 2013 in Brazil, by means of Provisional Measure no. 608, of February 28, 2013 and, in Spain, through Royal Decree-Law 14/2013, of 29 November confirmed by Law 27/2014, of November 27 tax regimes were established whereby certain deferred tax assets (arising from provisions to allowances for loan losses in Brazil and provisions to allowances for loan losses, provisions to allowances for foreclosed assets and provisions for pension and pre-retirement obligations in Spain) may be converted into tax receivables in specific circumstances. As a result, their use does not rely on the entities obtaining future profits and, accordingly, they are exempt from deduction from regulatory capital. In 2015 Spain completed its regulations on monetizable tax assets with the introduction of a financial contribution which will involve the payment of 1.5% for maintaining the right to monetise which will be applied to the portion of the deferred tax assets that qualify under the legal requirements as monetizable assets generated prior to 2016. In a similar manner, Italy, by decree of May 3, 2016 has introduced a fee of 1.5% annually to maintain the monetizable of part of the deferred tax assets. The detail of deferred tax assets, by classification as monetizable or non-monetizable assets, and of deferred tax liabilities at December 31, 2018, 2017 and 2016 is as follows: Million of euros 2018 2017 2016 Monetizable Monetizable Monetizable (*)(**) Other (*)(**) Other (*) Other Tax assets: 10,866 12,392 11,046 12,164 9,649 11,615 Tax losses and tax credits — 4,276 — 4,457 — 4,934 Temporary differences 10,866 8,116 11,046 7,707 9,649 6,681 Of which: Non-deductible provisions — 2,613 — 2,336 — 1,645 Valuation of financial instruments — 609 — 530 — 1,042 Loan losses 7,279 1,308 7,461 1,159 6,082 940 Pensions 3,587 632 3,585 723 3,567 641 Valuation of tangible and intangible assets — 1,215 — 1,077 — 537 Tax liabilities: — 5,568 — 4,837 — 5,694 Temporary differences — 5,568 — 4,837 — 5,694 Of which: Valuation of financial instruments — 1,168 — 1,207 — 1,105 Valuation of tangible and intangible assets — 1,503 — 1,256 — 1,916 Investments in Group companies — 880 — 808 — 1,265 (*) Not deductible from regulatory capital. (**) Banco Popular Español, S.A.U. requested the conversion of part of its monetizable assets in 2017 (EUR 486 million which were approved in 2018) and in 2018 (EUR 995 million pending resolution) given the circumstances of the aforementioned regulations are applied. The Group only recognises deferred tax assets for temporary differences or tax loss and tax credit carryforwards where it is considered probable that the consolidated entities that generated them will have sufficient future taxable profits against which they can be utilised. The deferred tax assets and liabilities are reassessed at the reporting date in order to ascertain whether any adjustments need to be made on the basis of the findings of the analyses performed. These analyses take into account, inter alia: (i) the results generated by the various entities in prior years, (ii) each entity or tax group’s projected earnings, (iii) the estimated reversal of the various temporary differences, based on their nature, and (iv) the period and limits established by the legislation of each country for the recovery of the various deferred tax assets, thereby concluding on each entity or tax group’s ability to recover its recognised deferred tax assets. The projected earnings used in these analyses are based on the financial budgets approved by the Group’s directors for the various entities applying constant growth rates not exceeding the average long-term growth rate for the market in which the consolidated entities operate, in order to estimate the earnings for subsequent years considered in the analyses. Relevant information is set forth below for the main countries which have recognised deferred tax assets: Spain The deferred tax assets recognised at the Consolidated Tax Group total EUR 12,987 million, of which EUR 7,422 million were for monetizable temporary differences with the right to conversion into a credit against the Public Finance, EUR 2,465 million for other temporary differences and EUR 3,100 million for tax losses and credits. The Group estimates that the recognised deferred tax assets for temporary differences will be recovered in a maximum period of 15 years. This period would also apply to the recovery of the recognised tax loss and tax credit carryforwards. Brazil The deferred tax assets recognised in Brazil total EUR 5,869 million, of which EUR 3,249 million were for monetizable temporary differences,EUR 2,392 million for other temporary differences and EUR 228 million for tax losses and credits. The Group estimates that the recognised deferred tax assets for temporary differences, tax losses and credits will be recovered in approximately 10 years. United States The deferred tax assets recognised in the United States total EUR 1,209 million, of which EUR 512 million were for temporary differences and EUR 697 million for tax losses and credits. The Group estimates that the recognised deferred tax assets for temporary differences will be recovered before 2028. The recognised tax loss and tax credit carryforwards will be recovered before 2029. The changes in Tax assets - Deferred and Tax liabilities - Deferred in the last three years were as follows: Million of euros Foreign IFRS9 currency Adoption balance (Charge)/Credit impact translation to asset and Balances at (Balance at differences liability Acquisition Balances at December 31, 1 January (Charge)/ and other valuation for the year December 31, 2017 2018 Credit to income items adjustments (net) 2018 Deferred tax assets 23,210 680 241 (807) 149 (215) 23,258 Tax losses and tax credits 4,457 — (128) 1 — (54) 4,276 Temporary differences 18,753 680 369 (808) 149 (161) 18,982 Of which: monetizable 11,046 273 390 (843) — — 10,866 Deferred tax liabilities (4,837) — (364) (114) (315) 62 (5,568) Temporary differences (4,837) — (364) (114) (315) 62 (5,568) 18,373 680 (123) (921) (166) (153) 17,690 Million of euros Foreign currency balance (Charge)/Credit translation to asset and Balances at differences liability Acquisitions Balances at December 31, (Charge)/Credit and other valuation for the year December 31, 2016 to income items adjustments (net) 2017 Deferred tax assets 21,264 (675) (756) (1) 3,378 23,210 Tax losses and tax credits 4,934 (279) (205) — 7 4,457 Temporary differences 16,330 (396) (551) (1) 3,371 18,753 Of which: monetizable 9,649 (185) (455) — 2,037 11,046 Deferred tax liabilities (5,694) 568 414 19 (144) (4,837) Temporary differences (5,694) 568 414 19 (144) (4,837) 15,570 (107) (342) 18 3,234 18,373 Million of euros Foreign currency balance (Charge)/Credit translation to asset and Balances at differences liability Acquisitions Balances at December 31, (Charge)/Credit and other valuation for the year December 31, 2015 to income items adjustments (net) 2016 Deferred tax assets 22,045 (1,311) 1,355 (551) (274) 21,264 Tax losses and tax credits 4,808 194 110 — (178) 4,934 Temporary differences 17,237 (1,505) 1,245 (551) (96) 16,330 Of which: monetizable 8,887 49 713 — — 9,649 Deferred tax liabilities (5,565) (478) 98 (26) 277 (5,694) Temporary differences (5,565) (478) 98 (26) 277 (5,694) 16,480 (1,789) 1,453 (577) 3 15,570 Also, the Group did not recognise deferred tax assets relating to tax losses, tax credits for investments and other incentives amounting to approximately EUR 5,500 million, the use of which EUR 450 million is subject, among other requirements, to time limits. f) The following significant tax reforms were approved in 2018 and previous years: The Tax Cuts and Jobs Act (the 2017 Act) was approved in the United States on December 22, 2017. The main amendments introduced in this tax regulation affected the US corporate tax rates, some business-related exclusions and deductions and credits. Likewise, this amendment entailed an international tax impact for many companies that operate internationally. The main impact is derived from the decrease in the federal tax rate that was reduced from 35% to 21%, which affected both the amount and estimation of the recoverability of deferred tax assets and liabilities during 2017 as well as the profit after tax from 2018. The estimated impact on the Group, arisen from the affected subsidiaries, which was already recorded as of December 31, 2017, did not represent a significant amount in the attributable profit. On December 29, 2017, Law No. 27430 on the reform of the Argentine tax system was published, whose main measures entered into force on January 1, 2018, therefore it had no effect on the Group’s accounts in 2017. Among other measures, it is established a gradual reduction of the income tax from the 35% applicable until 2017, to 30% in 2018 and 2019, and up to 25% in 2020 and ahead, which is complemented by a dividend withholding of 7% for those distributed with a charge to 2018 and 2019 financial years, and 13% if distributed with a charge to 2020 onwards. On December 2016, the Royal Decree-Law 3-2016 was approved in Spain under which the following tax measures were adopted , among others,: (i) The limit for the integration of deferred monetizable tax assets, as well as for set-off for the negative tax was reduced (the limit was reduced from 70% to 25% of the tax base), (ii) this regulation set out a new limit of 50% of the tax rate for the application of deductions in order to avoid double taxation, (iii) this regulation also set out the compulsory impairment reversion for deductible participations in previous years by one fifths independently from the recovery of the participated, and (iv) the regulation included the non-deductibility of the losses generated from the transmission of participations performed from January 1, 2017. The effects of this reform for the consolidated tax Group were: (i) the consolidation in 2016 of deferred tax assets for impairment of non-deductible participations, in a non significant amount; (ii) the integration in 2016 tax base and the next four fiscal years of a minimum reversal of the impairment of investments in shares that were tax deductible in years prior to 2013, that has no an adverse effect on the accounts, since there are no legal restrictions on the availability of shares; (iii) the slowdown in the consumption of credits for monetizable deferred tax assets; And negative tax bases and (iv) the limitation of the application of deductions to avoid double taxation, all this makes provision for an increase in the amount of taxes payable in Spain in the coming years by the consolidated tax group. In the United Kingdom, a progressive reduction was approved in 2016 regarding the tax rate of the Corporate Tax, from 20% to 17%. The applicable rate from April 1, 2017 is 19% and it will be 17% from April 1, 2020. Also, in 2015, a surcharge of 8% on the standard income tax rate for bank profits was approved. This surcharge applies from January 1, 2016. In addition, from 2015 customer remediation payments are no longer considered to be tax-deductible. In Poland, the introduction of a tax on certain bank assets at a monthly rate of 0.0366%, which comes into force in 2016, was approved. In Brazil, in 2015, there was also an increase for insurance and financial companies and in the rate of the Brazilian social contribution tax on net income (CSL) from 15% to 20% (applicable from September 1, 2015 to December 31, 2018). Since January 1, 2019, the tax rate is 15% again, as a result of which the income tax rate (25%) plus the CSL rate total 40% for those companies. As a result of the tax reform approved in Chile in 2012, the applicable tax rate gradually increased from 20% to 27% from 2018 onwards. g) In compliance with the disclosure requirement established in the Listing Rules Instrument 2005 published by the UK Financial Conduct Authority, it is hereby stated that shareholders of the Bank resident in the United Kingdom will be entitled to a tax credit for taxes paid abroad in respect of withholdings that the Bank has to pay on the dividends to be paid to such shareholders if the total income of the dividend exceeds the amount of exempt dividends of GBP 2,000 for the year 2018/19. The shareholders of the Bank resident in the United Kingdom who hold their ownership interest in the Bank through Santander Nominee Service will be informed directly of the amount thus withheld and of any other data they may require to complete their tax returns in the United Kingdom. The other shareholders of the Bank resident in the United Kingdom should contact their bank or securities broker. Banco Santander, S.A. is part of the Large Business Forum and has adhered since 2010 to the Code of Good Tax Practices in Spain. Also Santander UK is a member of the HMRC’s Code of Practice on Taxation in the United Kingdom, actively participating in both cases in the cooperative compliance programs being developed by these Tax Administrations.

Non-controlling interests

Non-controlling interests	12 Months Ended
	Dec. 31, 2018
Non-controlling interests Abstract
Non-controlling interests	28. Non-controlling interests Non-controlling interests include the net amount of the equity of subsidiaries attributable to equity instruments that do not belong, directly or indirectly, to the Bank, including the portion attributed to them of profit for the year. a) The detail, by Group company, of Equity - Non-controlling interests is as follows: Million of euros 2018 2017 2016 Santander Consumer USA Holdings Inc. 1,652 1,479 1,963 Santander Bank Polska S.A. 1,538 1,901 1,653 Grupo PSA 1,409 1,305 1,149 Banco Santander (Brasil) S.A. 1,114 1,489 1,784 Banco Santander México, S.A. Institución de Banca Múltiple, Grupo Financiero Santander México 1,093 1,056 1,069 Banco Santander - Chile 1,085 1,209 1,204 Grupo Metrovacesa — 836 449 Other companies (*) 1,493 1,481 1,208 9,384 10,756 10,479 Profit/(Loss) for the year attributable to non-controlling interests 1,505 1,588 1,282 Of which: Banco Santander (Brasil) S.A. 292 288 194 Banco Santander - Chile 279 264 215 Grupo PSA 232 206 171 Santander Consumer USA Holdings Inc. 218 368 256 Banco Santander México, S.A. Institución de Banca Múltiple, Grupo Financiero Santander México 216 194 190 Santander Bank Polska S.A. 173 160 148 Other companies 95 108 108 10,889 12,344 11,761 (*) Includes a Santander UK plc issuance of perpetual equity instruments of EUR 1,280 million in 2018 (EUR 1,290 million and EUR 753 million in 2017 and 2016, respectively). b) The changes in Non-controlling interests are summarised as follows: Million of euros 2018 (*) 2017 2016 Balance at the end of the previous year 12,344 11,761 10,713 Effect of changes in accounting policies (**) (1,292) — — Balance at beginning of year 11,052 11,761 10,713 Other comprehensive income (109) (583) 374 Exchange differences (135) (653) 360 Cash flow hedge (1) (11) 45 Available for sale equity — (2) (30) Available for sale fixed income — 71 38 Changes in the fair value of equity instruments (12) — — Changes in the fair value of debt instruments 40 — — Other (1) 12 (39) Other (54) 1,166 674 Profit attributable to non-controlling interests 1,505 1,588 1,282 Modification of participation rates (65) (819) (28) Change of perimeter (660) (39) (197) Dividends paid to minority shareholders (687) (665) (800) Changes in capital and others concepts (147) 1,101 417 Balance at end of year 10,889 12,344 11,761 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) See change in consolidated statements of changes in total equity. During 2016, there was a decrease of EUR 621 million in Non - controlling interests due to the transaction of Metrovacesa, S.A. (See Note 3). Additionally, during the year 2016, the Group incorporated the remaining geographies included in the PSA framework agreement (Netherlands, Belgium, Italy, Germany, Brazil and Poland) (see Note 3), generating an increase in the balance of Non - controlling interests of EUR 410 million. During the year 2017, the Group completed the acquisition of 9.65% of shares of Santander Consumer USA Holdings Inc (See Note 3), which resulted in a reduction of EUR 492 million in the balance of Non - controlling interests. In 2018 there was a loss of control over Metrovacesa, S.A. in the Group, which has led to a decrease of EUR 826 million in the balance of Minority interests (see Note 3). The foregoing changes are shown in the consolidated statement of changes in total equity. c) The financial information on the subsidiaries with significant non-controlling interests at December 31, 2018 is summarised below: Million of euros (*) Grupo Banco Financiero Santander Santander Banco Santander Santander Consumer (Brasil) Santander - México, Bank USA S.A. (Chile), S.A. S.A.B. de C.V. Polska S.A. Holdings Inc. Total assets 166,036 50,911 65,876 43,669 38,526 Total liabilities 150,760 46,035 60,507 38,736 32,340 Net assets 15,276 4,876 5,369 4,933 6,186 Total income 13,345 2,535 3,527 1,488 4,215 Total profit 2,940 901 975 424 710 (*) Information prepared in accordance with the segment reporting criteria described in Note 52 and, therefore, it may not coincide with the information published separately by each entity. .

Other comprehensive income

Other comprehensive income	12 Months Ended
	Dec. 31, 2018
Other comprehensive income by item
Other comprehensive income	29. Other comprehensive income The balances of Other comprehensive income include the amounts, net of the related tax effect, of the adjustments to assets and liabilities recognised in equity through the consolidated statement of recognised income and expense. The amounts arising from subsidiaries are presented, on a line by line basis, in the appropriate items according to their nature. Respect to items that may be reclassified to profit or loss, the consolidated statement of recognised income and expense includes changes in other comprehensive income as follows: - Revaluation gains (losses): includes the amount of the income, net of the expenses incurred in the year, recognised directly in equity. The amounts recognised in equity in the year remain under this item, even if in the same year they are transferred to the income statement or to the initial carrying amount of the assets or liabilities or are reclassified to another line item. - Amounts transferred to income statement: includes the amount of the revaluation gains and losses previously recognised in equity, even in the same year, which are recognised in the income statement. - Amounts transferred to initial carrying amount of hedged items: includes the amount of the revaluation gains and losses previously recognised in equity, even in the same year, which are recognised in the initial carrying amount of assets or liabilities as a result of cash flow hedges. - Other reclassifications: includes the amount of the transfers made in the year between the various valuation adjustment items. The amounts of these items are recognised gross, including the amount of the Other comprehensive income relating to non-controlling interests, and the corresponding tax effect is presented under a separate item, except in the case of entities accounted for using the equity method, the amounts for which are presented net of the tax effect. a) Million of euros 12-31-2018 12-31-2017 12-31-2016 (IFRS9) (*) (IAS39) (IAS39) Other comprehensive income (22,141) (21,776) (15,039) Items that will not be reclassified to profit or loss (2,936) (4,034) (3,933) Actuarial gains and losses on defined benefit pension plans (3,609) (4,033) (3,931) Non-current assets held for sale — — — Share in other income and expenses recognised in investments, joint ventures and associates 1 (1) (2) Other valuation adjustments — — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income 597 Inefficiency of fair value hedges of equity instruments measured at fair value with changes in other comprehensive income — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedged item) — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedging instrument) — Changes in the fair value of financial liabilities measured at fair value through profit or loss attributable to changes in credit risk 75 Items that may be reclassified to profit or loss (19,205) (17,742) (11,106) Hedges of net investments in foreign operations (effective portion) (4,312) (4,311) (4,925) Exchange differences (15,730) (15,430) (8,070) Hedging derivatives (effective portion) 277 152 469 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income 828 Hedging instruments (items not designated) — Financial assets available for sale 2,068 1,571 Debt instruments 1,154 423 Equity instruments 914 1,148 Non-current assets held for sale — — — Share in other income and expenses recognised in investments, joint ventures and associates (268) (221) (151) (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). b) Other comprehensive income – Items not reclassified to profit or loss – Actuarial gains or (-) losses on defined benefit pension plans include the actuarial gains and losses and the return on plan assets, less the administrative expenses and taxes inherent to the plan, and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). Its variation is shown in the consolidated statement of income and expense. The provisions against equity in 2018 amounted to EUR 618 million - See Note 25.b -, with the following breakdown: - Decrease of EUR 65 million in the accumulates actuarial losses relating to the Group´s entities in Spain, mainly due to the evolution experienced by the discount rate - increase from 1.40% to 1.55%. - Decrease of EUR 481 million in the cumulative actuarial losses relating to the Group´s businesses in the UK, mainly due to the evolution experienced by the discount rate – increase from 2.49% to 2.90%. - Increase of EUR 95 million in accumulated actuarial losses corresponding to the Group’s business in Brazil, mainly due to the reduction in the discount rate (from 9.53% to 9.11% in pension benefits and 9.65% to 9.26% in medical benefits), as well as variations in the other hypotheses. The other modification in accumulated actuarial profit or losses is a decrease of EUR 167 million as a result of exchange rate and other effects, mainly in Brazil (depreciation of the real). c) Includes the net amount of unrealised fair value changes of equity instruments at fair value with changes in other comprehensive income. The following is a breakdown of the composition of the balance as of December 31, 2018 (IFRS9) under "Other comprehensive income" - Items that will not be reclassified to profit or loss - Changes in the fair value of equity instruments measured at fair value with changes in other global result depending on the geographical origin of the issuer: Million of euros 12-31-18 (*) Capital gains by Capital losses by Net gains/losses by Fair value Equity instruments Domestic Spain 20 (216) (196) 417 International Rest of Europe 160 (76) 84 652 United States 9 — 9 42 Latin America and rest 708 (8) 700 1,560 897 (300) 597 2,671 Of which: Publicly listed 818 (18) 800 1,943 Non publicly listed 79 (282) (203) 728 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). d) The changes in 2018 reflect the negative effect of the depreciation of large part of the currencies, mainly the Brazilian real and pound sterling, whereas the changes in 2017 reflect the negative effect of the sharp depreciation of the Brazilian real and the US dollar. Of the change in the balance in these years, a loss of EUR 556, 1,704 and 185 million in 2018, 2017 and 2016 relate to the measurement of goodwill. The detail, by country is as follows: Million of euros 2018 2017 2016 Net balance at end of year (20,042) (19,741) (12,995) Of which: Brazilian Real (12,950) (11,056) (8,435) Pound Sterling (3,924) (3,732) (2,996) Mexican Peso (2,312) (2,230) (1,908) Argentine Peso(*) - (1,684) (1,309) Chilean Peso (1,238) (866) (614) US Dollar 1,330 555 2,849 Other (948) (728) (582) (*) In 2018, due to the application of IAS29 for hyperinflationary economies, they have been transferred to Other Reserves (see Note 33). e) Other comprehensive income – Items that may be reclassified to profit or loss - Cash flow hedges includes the gains or losses attributable to hedging instruments that qualify as effective hedges. These amounts will remain under this heading until they are recognised in the consolidated income statement in the periods in which the hedged items aff1ect it (See Note 11). f) Includes the net amount of unrealised changes in the fair value of assets classified as Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income (IFRS9) and Financial assets available-for-sale (IAS39) (See Notes 7 and 8). The breakdown, by type of instrument and geographical origin of the issuer, of Other comprehensive income – Items that may be reclassified to profit or loss - Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income (IFRS9) and Financial assets available-for-sale (IAS39) at December 31, 2018, 2017 and 2016 is as follows: Million of euros December 31, 2018 (*) December 31, 2017 December 31, 2016 Net Net Net revaluation revaluation revaluation Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair gains losses (losses) value gains losses (losses) value gains losses (losses) value Debt instruments Government debt securities and debt Instruments issued by central banks Spain 326 (3) 323 38,550 660 (25) 635 48,217 610 (26) 584 32,729 Rest of Europe 373 (55) 318 17,494 306 (24) 282 20,244 50 (170) (120) 16,879 Latin America and rest of the world 448 (117) 331 42,599 404 (129) 275 39,132 167 (163) 4 35,996 Private-sector debt securities 37 (178) (141) 19,777 90 (128) (38) 20,888 117 (162) (45) 25,683 1,184 (353) 831 118,420 1,460 (306) 1,154 128,481 944 (521) 423 111,287 Equity instruments Domestic — — — — — — — — — — — — Spain International — — — — 5 (2) 3 1,373 48 (5) 43 1,309 Rest of Europe — — — — 166 (2) 164 979 284 (4) 280 1,016 United States — — — — 14 (5) 9 560 21 — 21 772 Latin America and rest of the world — — — — 744 (6) 738 1,878 811 (7) 804 2,390 — — — — 929 (15) 914 4,790 1,164 (16) 1,148 5,487 Of which: Listed — — — — 828 (5) 823 2,900 999 (11) 988 3,200 Unlisted — — — — 101 (10) 91 1,890 165 (5) 160 2,287 — — — — 2,389 (321) 2,068 133,271 2,108 (537) 1,571 116,774 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). At the end of 2017 and 2016 the Group assessed whether there is any objective evidence that the instruments classified Changes in the fair value of debt and equity instruments measured at fair value with changes in other comprehensive income and Financial assets available-for-sale (IAS39) (debt securities and equity instruments) were impaired. This assessment included but was not limited to an analysis of the following information: i) the issuer’s economic and financial position, the existence of default or late payment, analysis of the issuer’s solvency, the evolution of its business, short-term projections, trends observed with respect to its earnings and, if applicable, its dividend distribution policy; ii) market-related information such as changes in the general economic situation, changes in the issuer’s sector which might affect its ability to pay; iii) changes in the fair value of the security analysed, analysis of the origins of such changes - whether they are intrinsic or the result of the general uncertainty concerning the economy or the country - and iv) independent analysts’ reports and forecasts and other independent market information. As of January 1, 2018, with the entry into force of IFRS9, the Group estimates the expected losses on debt instruments measured at fair value with changes in other comprehensive income. These losses are recorded with a charge to the consolidated income statement for the period. At the end of the years 2018, 2017 and 2016, the Group recorded under Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net due to modification of the consolidated income statement, in the line of financial assets at fair value with changes in other comprehensive income (IFRS9) a provision of EUR 1 million in 2018, and in the line of available-for-sale financial assets (IAS39) a provision of EUR 10 million in equity instruments in 2017, and a reversal of provision of EUR 25 million and a provision of EUR 14 million in debt and equity instruments, respectively, in 2016. Until December 31, 2017, in the case of quoted equity instruments, when the changes in the fair value of the instrument under analysis were assessed, the duration and significance of the fall in its market price below cost for the Group was taken into account. As a general rule, for these purposes the Group considers a significant fall to be a 40% drop in the value of the asset or a continued fall over a period of 18 months. Nevertheless, it should be noted that the Group assessed, on a case-by-case basis, each of the securities that have suffered losses, and monitors the performance of their prices, recognising an impairment loss as soon as it is considered that the recoverable amount could be affected, even though the price may not have fallen by the percentage or for the duration mentioned above. If, after the above assessment has been carried out, the Group considers that the presence of one or more of these factors could affect recovery of the cost of the asset, an impairment loss was recognised in the income statement for the amount of the loss registered in equity under Other comprehensive income – Items that may be reclassified to profit or loss – Items not reclassified to profit or loss – Other Valuation adjustments. Also, where the Group was not intend and/or is not able to hold the investment for a sufficient amount of time to recover the cost, the instrument was written down to its fair value. As of January 1 2018, with the entry into force of IFRS9, no impairment analysis is performed of equity instruments recognised under Other comprehensive income . IFRS9 eliminates the need to carry out the impairment estimate on this class of equity instruments and the reclassification to profit and loss on the disposal of these assets. g) The changes in other comprehensive income - Entities accounted for using the equity method were as follows: Million of euros 2018 2017 2016 Balance at beginning of year (222) (153) (232) Revaluation gains/(losses) (65) (84) 79 Net amounts transferred to profit or loss 20 15 — Balance at end of year (267) (222) (153) Of which: Zurich Santander Insurance América, S.L. (159) (145) (84)

Shareholders' equity

Shareholders' equity	12 Months Ended
	Dec. 31, 2018
Shareholders' equity
Shareholders' equity	30. Shareholders’ equity The changes in Shareholders' equity are presented in the consolidated statement of changes in total equity. Significant information on certain items of Shareholders' equity and the changes therein in 2018 is set forth below.

Issued capital

Issued capital	12 Months Ended
	Dec. 31, 2018
Issued capital abstract
Issued capital	31. Issued capital a) At December 31, 2015 the Bank’s share capital consisted of 14,434,492,579 shares with a total par value of EUR 7,217 million. On November 4, 2016, a capital increase of EUR 74 million was made, through which the Santander Dividendo Elección scrip dividend scheme took place, whereby 147,848,122 shares were issued (1.02% of the share capital). At December 31, 2016 the Bank’s share capital consisted of 14,582,340,701 shares with a total par value of EUR 7,291 million. As a result of the acquisition of Banco Popular Español, S.A.U. described in Note 3, and in order to strengthen and optimize the Bank’s equity structure to provide adequate coverage of the acquisition, the Group, on July 3, 2017, reported on the agreement of the executive committee of Banco Santander , S.A.to increase the capital of the Bank by EUR 729 million by issuing and putting into circulation 1,458,232,745 new ordinary shares of the same class and series as the shares currently in circulation and with preferential subscription rights for the shareholders. The issue of new shares was carried out at a nominal value of fifty euro cents (EUR 0.50) plus a premium of EUR 4.35 per share, so the total issue rate of the new shares was EUR 4.85 per share and the total effective amount of the capital increase (including nominal and premium) of EUR 7,072 million. Each outstanding share had been granted a preferential subscription right during the preferential subscription period that took place from July 6 to 20, 2017, where 10 preferential subscription rights were required to subscribe 1 new share. On November 7, 2017, a capital increase of EUR 48 million was made, through which the Santander Dividendo Elección scrip dividend scheme took place, whereby 95,580,136 shares were issued (0.6% of the share capital). At December 31, 2017 the Bank’s share capital consisted of 16,136,153,582 shares with a total par value of EUR 8,068 million. On November 7, 2018, a capital increase of EUR 50 million was made, through which the Santander Dividendo Elección scrip dividend scheme took place, whereby 100,420,360 shares were issued (0.62% of the share capital). Therefore, the Bank’s new capital consists of EUR 8,118 million at December 31, 2018, represented by 16,236,573,942 shares of EUR 0.50 of nominal value each one and all of them from a unique class and series. The Bank’s shares are listed on the Spanish Stock Market Interconnection System and on the New York, London, Mexico and Warsaw Stock Exchanges, and all of them have the same features and rights. Santander shares are listed on the London Stock Exchange under Crest Depository Interest (CDI’s), each CDI representing one Bank’s share. They are also listed on the New York Stock Exchange under American Depositary Receipts (BDRs), each BDR representing one share. During 2018 and the beginning of 2019 the number of markets where the Bank is listed has been reduced; the Bank's shares has been delisted from Buenos Aires, Milan, Lisboa and Sao Paulo's markets. At December 31, 2018, the only shareholders listed in the Bank’s shareholders register with ownership interests of more than 3% 1 were State Street Bank & Trust Company (13.09%), The Bank of New York Mellon Corporation (8.85%), Chase Nominees Ltd. (6.69%), EC Nominees Limited (3.96%) and BNP Paribas (3.79%). However, the Bank considers that these ownership interests are held in custody on behalf of third parties and that none of them, as far as the Bank is aware, has an ownership interest of more than 3% of the Bank’s share capital 2 or voting power. As of December 31, 2018, the shareholders of the Bank did not have owners of shares resident in tax havens with a participation of more than 1% of the share capital. (1) (2) Comisión Nacional del Mercado de Valores (www.cnmv.es) contains a notice of significant holding published by Blackrock, Inc. on August 9, 2017, in which it notifies an indirect holding in the voting rights attributable to Bank shares of 5.585%, plus a further stake of 0.158% held through financial instruments. During 2018, Blackrock Inc. informed the Spanish CNMV of the following movements regarding its voting rights in the Bank: April 23, 2018, reduction below 5%, and May 8, 2018, increase above 5%. However, according to the Bank’s shareholder register, Blackrock, Inc did not hold more than 3% of the voting rights on that date, or on December 31, 2018. b) The shareholders at the annual general meeting of March 18, 2016 also resolved to increase the Bank's capital by a par value of EUR 500 million and granted the board the broadest powers to set the date and establish the terms and conditions of this capital increase within one year from the date of the aforementioned annual general meeting. If the board does not exercise the powers delegated to it within the period established by the annual general meeting, these powers will be rendered null and void. In addition, the ordinary general meeting of shareholders of April 7, 2017 also agreed to delegate to the board of directors the broadest powers so that, within one year from the date of the meeting, it can indicate the date and set the conditions for a capital increase with the issuance of new shares, for an amount of EUR 500 million. The capital increase will have no value or effect if, within the period of one year, the board of directors does not exercise the powers delegated to it. Likewise, the additional capital authorised by the ordinary general meeting of shareholders on April 7, 2017 is not more than EUR 3,645,585,175. The term available to the Bank’s administrators to execute and carry out capital increases up to that limit ends on April 7, 2020. The agreement grants the board the power to totally or partially exclude the pre-emptive subscription right under the terms of article 506 of the Capital Companies Law, although this power is limited to EUR 1,458,234,070. At March 23, 2018, the ordinary general meeting of shareholders also agreed to delegate to the board of directors the broadest power to execute the capital increase agreement adopted by the shareholders meeting and the authorization to the Board of directors to increase it. At December 31, 2018 the shares of the following companies were listed on official stock markets: Banco Santander Río, S.A.; Grupo Financiero Santander México, S.A. de C.V.; Banco Santander - Chile; Cartera Mobiliaria, S.A., SICAV; Santander Chile Holding S.A.; Banco Santander (Brasil) S.A., Santander Bank Polska S.A. (former Bank Zachodni WBK S.A.) and Santander Consumer USA Holdings Inc. At December 31, 2018 the number of Bank shares owned by third parties and managed by Group management companies (mainly portfolio, collective investment undertaking and pension fund managers) or jointly managed was 63 million shares, which represented 0.39% of the Bank’s share capital. In addition, the number of Bank shares owned by third parties and received as security was 212 million shares (equal to 1.30% of the Bank’s share capital). At December 31, 2018 the capital increases in progress at Group companies and the additional capital authorised by their shareholders at the respective general meetings were not material at Group level (See Appendix V).

Share premium

Share premium	12 Months Ended
	Dec. 31, 2018
Share Premium Abstract
Share premium	32. Share premium Share premium includes the amount paid up by the Bank’s shareholders in capital issues in excess of the par value. The Spanish Limited Liability Companies Law expressly permits the use of the share premium account balance to increase capital at the entities at which it is recognised and does not establish any specific restrictions as to its use. The reduction of EUR 74 million in 2016 is the result for the capital increases arising from the Santander Dividendo Elección scrip dividend scheme. The increase in the balance of Share premium in 2017 is the result of the capital increase of EUR 6,343 million approved on July 3, 2017 (See note 31.a) and the reduction of EUR 48 million is due the capital increases charge to reserve arising from the Santander Diviendo Elección program. The decrease produced in 2018 is a consequence of the reduction of EUR 50 million to cope with the capital increase as a result of the Santander Dividendo Elección program. Also, in 2018, 2017 and 2016 an amount of EUR 10 million was transferred from the Share premium account to the Legal reserve (2017: EUR 154 million; 2016: EUR 15 million) (See note 33.b.i).

Accumulated retained earnings

Accumulated retained earnings	12 Months Ended
	Dec. 31, 2018
Accumulated Retained Earnings
Accumulated retained earnings	33. Accumulated retained earnings a) The balance of Equity - Accumulated gains and Other reserves includes the net amount of the accumulated results (profits or losses) recognised in previous years through the consolidated income statement which in the profit distribution were allocated in equity, the expenses of own equity instrument issues, the differences between the amount for which the treasury shares are sold and their acquisition price, as well as the net amount of the results accumulated in previous years, generated by the result of non-current assets held for sale, recognised through the consolidated income statement. b) The detail of Accumulated retained earnings and Reserves of entities accounted for using the equity method is as follows: Million of euros 2018 2017 2016 Restricted reserves 2,580 2,880 2,686 Legal reserve 1,624 1,614 1,459 Own shares 902 1,212 1,173 Revaluation reserve Royal Decree-Law 7/1996 43 43 43 Reserve for retired capital 11 11 11 Unrestricted reserves 12,100 11,368 11,285 Voluntary reserves (*) 5,737 6,904 7,192 Consolidation reserves attributable to the Bank 6,363 4,464 4,093 Reserves of subsidiaries 37,593 36,862 34,568 Reserves of entities accounted for using the equity method 917 725 465 53,190 51,835 49,004 (*) In accordance with the commercial regulations in force in Spain. i. Legal reserve Under the Consolidated Spanish Limited Liability Companies Law, 10% of net profit for each year must be transferred to the legal reserve. These transfers must be made until the balance of this reserve reaches 20% of the share capital. The legal reserve can be used to increase capital provided that the remaining reserve balance does not fall below 10% of the increased share capital amount. In 2018 the Bank transferred EUR 10 million from the Share premium account to the Legal reserve (2017: EUR 154 million; 2016: EUR 15 million). Consequently, once again, after the capital increases described in Note 31 had been carried out, the balance of the Legal reserve reached 20% of the share capital, and at December 31, 2018 the Legal reserve was of the stipulated level. ii. Reserve for treasury shares Pursuant to the Consolidated Spanish Limited Liability Companies Law, a restricted reserve has been recognised for an amount equal to the carrying amount of the Bank shares owned by subsidiaries. The balance of this reserve will become unrestricted when the circumstances that made it necessary to record it cease to exist. Additionally, this reserve covers the outstanding balance of loans granted by the Group secured by Bank shares and the amount equivalent to loans granted by Group companies to third parties for the acquisition of treasury shares plus the own treasury shares amount. iii. Revaluation reserve Royal Decree Law 7/1996, of 7 June The balance of Revaluation reserve Royal Decree-Law 7/1996 can be used, free of tax, to increase share capital. From January 1, 2007, the balance of this account can be taken to unrestricted reserves, provided that the monetary surplus has been realised. The surplus will be deemed to have been realised in respect of the portion on which depreciation has been taken for accounting purposes or when the revalued assets have been transferred or derecognised. If the balance of this reserve were used in a manner other than that provided for in Royal Decree-Law 7/1996, of June 7, it would be subject to taxation. iv. Reserves of subsidiaries The detail, by company, of Reserves of subsidiaries, based on the companies’ contribution to the Group (considering the effect of consolidation adjustments) is as follows: Million of euros 2018 2017 2016 Banco Santander (Brasil) S.A. (Consolidated Group) 10,755 9,874 8,993 Santander UK Group 8,207 7,724 6,887 Group Santander Holdings USA. 4,260 4,150 4,091 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 3,436 3,229 3,255 Banco Santander - Chile 2,963 2,764 2,630 Santander Consumer Finance Group 2,841 2,465 2,027 Banco Santander Totta, S.A. (Consolidated Group) 2,729 2,821 2,593 Santander Bank Polska S.A. 1,387 1,093 967 Santander Seguros y Reaseguros, Compañía Aseguradora, S.A. 714 638 824 Banco Santander (Suisse) SA. 369 381 354 Santander Investment, S.A. 208 202 349 Banco Santander Río S.A. (82) 1,639 1,326 Cartera Mobiliaria, S.A., SICAV — — 377 Exchange differences, consolidation adjustments and other companies (*) (194) (118) (105) 37,593 36,862 34,568 Of which, restricted 2,964 2,777 2,730 (*) Includes the charge relating to cumulative exchange differences in the transition to International Financial Reporting Standards.

Other equity instruments and ow

Other equity instruments and own shares	12 Months Ended
	Dec. 31, 2018
Other equity instruments and own shares
Other equity instruments and own shares	34. Other equity instruments and own shares a) Other equity instruments includes the equity component of compound financial instruments, the increase in equity due to personnel remuneration, and other items not recognised in other “Shareholders’ equity” items. On September 8, 2017, Banco Santander issued contingent redeemable perpetual bonds (the “Fidelity Bonds”) amounting to EUR 981 million nominal value -EUR 686 million fair value- of those in the power of third parties an amount amounting to EUR 549 million. On December 31, 2018 amounted to EUR 565 million. Additionally, at December 31, 2018 the Group had other equity instruments amounting to EUR 234 million. b) Shareholders’ equity - Own shares includes the amount of own equity instruments held by all the Group entities. Transactions involving own equity instruments, including their issuance and cancellation, are recognised directly in equity, and no profit or loss may be recognised on these transactions. The costs of any transaction involving own equity instruments are deducted directly from equity, net of any related tax effect. On October 21, 2013 and October 23, 2014 the Bank’s board of directors amended the regulation of its treasury share policy in order to take into account the criteria recommended by the CNMV, establishing limits on average daily purchase trading and time limits. Also, a maximum price per share was set for purchase orders and a minimum price per share for sale orders. The Bank’s shares owned by the consolidated companies accounted for 0.075% of issued share capital at December 31, 2018 (December 31, 2017: 0.024%; December 31, 2016: 0.010%). The average purchase price of the Bank’s shares in 2018 was EUR 4.96 per share and the average selling price was EUR 4.98 per share. The effect on equity, net of tax, arising from the purchase and sale of Bank shares was of EUR 0 million in 2018 (2017: EUR 26 million; 2016: EUR 15 million).

Memorandum items

Memorandum items	12 Months Ended
	Dec. 31, 2018
Off-balance-sheet exposures
Memorandum items	35. Memorandum items Memorandum items relates to balances representing rights, obligations and other legal situations that in the future may have an impact on net assets, as well as any other balances needed to reflect all transactions performed by the consolidated entities although they may not impinge on their net assets. a) Contingent liabilities includes all transactions under which an entity guarantees the obligations of a third party and which result from financial guarantees granted by the entity or from other types of contract. The detail is as follows: Million of euros 2018 2017 2016 Loans commitment granted 218,083 207,671 202,097 Of which doubtful 298 81 8 Financial guarantees granted 11,723 14,499 17,244 Of which doubtful 181 254 1,070 Financial guarantees 11,557 14,287 17,244 Credit derivatives sold 166 212 — Other commitments granted 74,389 64,917 57,055 Of which doubtful 983 992 — Technical guarantees 35,154 30,273 23,684 Other 39,235 34,644 33,371 The breakdown as at December 31, 2018 of the exposures and the provision fund (see note 25) out of balance sheet by impairment stage under IFRS9 is EUR 297,409 million and EUR 382 million in stage 1,EUR 5,324 million and EUR 132 million in stage 2 and EUR 1,462 million and EUR 265 million in stage 3, respectively. Additionally, the Group had provisions for guarantees and commitments granted for an amount of EUR 617 and 459 million and a doubtful exposure amounting to EUR 1,327 and 1,078 million, as at December 31, 2017 and 2016, respectively. A significant portion of these guarantees will expire without any payment obligation materialising for the consolidated entities and, therefore, the aggregate balance of these commitments cannot be considered as an actual future need for financing or liquidity to be provided by the Group to third parties. Income from guarantee instruments is recognised under Fee and commission income in the consolidated income statements and is calculated by applying the rate established in the related contract to the nominal amount of the guarantee. i. Loan commitments granted Loan commitments granted: firm commitments of grating of credit under predefined terms and conditions, except for those that comply with the definition of derivatives as these can be settled in cash or through the delivery of issuance of another financial instrument. They include stand-by credit lines and long-term deposits. ii. Financial guarantees granted Financial guarantees includes, inter alia, financial guarantee contracts such as financial bank guarantees, credit derivatives sold, and risks arising from derivatives arranged for the account of third parties. iii. Other commitments granted Other contingent liabilities include all commitments that could give rise to the recognition of financial assets not included in the above items, such as technical guarantees and guarantees for the import and export of goods and services. b) i) Off-balance-sheet funds under management The detail of off-balance-sheet funds managed by the Group and by joint ventures is as follows: Million of euros 2018 2017 2016 Investment funds 127,564 135,749 129,930 Pension funds 11,160 11,566 11,298 Assets under management 19,131 19,259 18,032 157,855 166,574 159,260 ii) Non-managed marketed funds At December 31, 2018 there are non-managed marketed funds totalling EUR 42,211 million (December 31, 2017: EUR 41,398 million; December 31, 2016: EUR 23,247 million). c) At December 31, 2018 the Group held in custody debt securities and equity instruments totalling EUR 940,650 million (December 31, 2017: EUR 997,061 million; December 31, 2016 EUR 965,648 million) entrusted to it by third parties.

Hedging Derivatives

Hedging Derivatives	12 Months Ended
	Dec. 31, 2018
Hedging Derivatives
Hedging Derivatives	36. Hedging derivatives The Group, within its financial risk management strategy, and in order to reduce asymmetries in the accounting treatment of its operations, enters into hedging derivatives on interest, exchange rate, credit risk or variation of stock prices, depending on the nature of the risk covered. Based on its objective, the Group classifies its hedges in the following categories: - Cash flow hedges: cover the exposure to the variation of the cash flows associated with an asset, liability or a highly probable forecast transaction. This cover the variable-rate issues in foreign currencies, fixed-rate issues in non-local currency, variable-rate interbank financing and variable-rate assets (bonds, commercial loans, mortgages, etc.). - Fair value hedges: cover the exposure to the variation in the fair value of assets or liabilities, attributable to an identified and hedged risk. This covers the interest risk of assets or liabilities (bonds, loans, bills, issues, deposits, etc.) with coupons or fixed interest rates, interests in entities, issues in foreign currencies and deposits or other fixed rate liabilities. - Hedging of net investments abroad: cover the exchange rate risk of the investments in subsidiaries domiciled in a country with a different currency from the functional one of the Group. The following table contains details of the hedging instruments used in the Group's hedging strategies as of December 31, 2018: Million Euros 2018 Carrying amount Changes in fair value used for Notional Value Assets Liabilities calculating hedge ineffectiveness Balance sheet line ítems Fair value hedges: 178,719 3,451 (5,114) 96 Interest rate risk 163,241 2,648 (4,616) 56 Equity swap 109 — (2) — Hedging derivatives Future interest rate 7,702 — — (126) Hedging derivatives Interest rate swap 129,217 2,345 (4,168) 321 Hedging derivatives Call money swap 19,579 170 (250) (32) Hedging derivatives Currency swap 4,957 121 (45) (17) Hedging derivatives Inflation swap — — — 9 Hedging derivatives Swaption 51 6 (6) — Hedging derivatives Collar 15 1 — — Hedging derivatives Floor 1,611 5 (145) (99) Hedging derivatives Exchange rate risk 3,019 11 (1) 3 Fx forward 3,019 11 (1) 3 Hedging derivatives Interest rate and exchange rate risk 12,237 792 (493) 42 Interest rate swap 3,022 143 (20) (15) Hedging derivatives Call money swap 20 — — — Hedging derivatives Currency swap 9,195 649 (473) 57 Hedging derivatives Inflation risk 168 — (4) (5) Call money swap 64 — (3) (3) Hedging derivatives Currency swap 104 — (1) (2) Hedging derivatives Credit risk 54 — — — CDS 54 — — — Hedging derivatives Cash flow hedges: 118,400 4,865 (976) (28) Interest rate risk 38,229 307 (229) 203 Fx forward 49 — (1) (1) Hedging derivatives Future interest rate 127 — — 29 Hedging derivatives Interest rate swap 33,956 240 (202) 159 Hedging derivatives Currency swap 2,350 57 (26) 11 Hedging derivatives Floor 1,747 10 — 5 Hedging derivatives Exchange rate risk 38,457 971 (568) (878) Future FX and c/v term FV 4,955 — — (697) Hedging derivatives FX forward 3,283 186 (15) (36) Hedging derivatives Future interest rate 4,946 — — (12) Hedging derivatives Interest rate swap 1,055 10 (5) 8 Hedging derivatives Currency swap 23,904 775 (548) (142) Hedging derivatives Floor 314 — — — Hedging derivatives Deposits borrowed — — — 1 Deposits Interest rate and exchange rate risk 34,383 3,542 (124) 665 Interest rate swap 12,572 20 (97) (7) Hedging derivatives Currency swap 21,811 3,522 (27) 672 Hedging derivatives Inflation risk 6,318 45 (30) 11 FX forward 414 — (9) (1) Hedging derivatives Currency swap 5,904 45 (21) 12 Hedging derivatives Equity risk 77 — (4) (8) Option 77 — (4) (8) Hedging derivatives Other risk 936 — (21) (21) Future FX and c/v term RF 936 — (21) (21) Hedging derivatives Hedges of net investments in foreign operations: 21,688 291 (273) (1) Exchange rate risk 21,688 291 (273) (1) FX forward 21,688 291 (273) (1) Hedging derivatives 318,807 8,607 (6,363) 67 Considering the main contributions of hedging within the Group, the main types of hedgings that are being carried are in Santander UK Group, Banco Santander, S.A., Consumer Group, Banco Santander Mexico and Banco Santander Brazil that are detailed below. Santander UK Group enters into derivatives to provide customers with risk management solutions and to manage and hedge the Group's own risks. Within fair value hedges, Santander UK Group has portfolios of assets and liabilities at fixed rate that are exposed to changes in fair value due to changes in market interest rates. These positions are managed by contracting mainly Interest Rate Swaps. Effectiveness is assessed by comparing the changes in the fair value of these portfolios generated by the hedged risk with the changes in the fair value of the derivatives contracted. Santander UK Group also has access to international markets to obtain financing by issuing fixed-rate debt in its functional currency and other currencies. As such, they are exposed to changes in interest rates and exchange rates, mainly in EUR and USD. This risk is mitigated with Cross Currency Swaps and Interest Rate Swaps in which they pay a fixed rate and receive a variable rate. Effectiveness is evaluated using linear regression techniques to compare changes in the fair value of the debt at interest and exchange rates with changes in the fair value of Interest Rate Swaps or Cross Currency Swaps. Within the cash flow hedges, Santander UK Group has portfolios of assets and liabilities at variable rates, normally at SONIA or LIBOR. To mitigate this risk of variability in market rates, it contracts Interest Rate Swaps. As Santander UK Group obtains financing in the international markets, it assumes a significant exposure to currency risk mainly USD and EUR. In addition, it also has debt securities for liquidity purposes that assume exposure in foreign moneys, mainly JPY. To manage this exchange rate risk, Spot, Forward and Cross Currency Swap are contracted to match the cash flow profile and the maturity of the estimated interest and principal repayments of the hedged item. Effectiveness, is assessed by comparing changes in the fair value of the derivatives with changes in the fair value of the hedged item attributable to the hedged risk by applying a hypothetical derivative method using linear regression techniques. In addition, within the hedges that cover equity risk, Santander UK Group offers employees the opportunity to purchase shares of the Bank at a discount under the Sharesave scheme, exposing the bank to share price risk. As such, options are purchased allowing them to purchase shares at a pre-set price. Banco Santander, S.A. covers the risks of its balance sheet in a variety of ways. On the one hand, documented as fair value hedges, it covers the interest rate, foreign currency and credit risk of fixed-income portfolios at a fixed rate (REPOs are included in this category). Resulting, in an exposure to changes in their fair value due to variations in market conditions based on the various risks hedged, which has an impact on the Bank's income statement. To mitigate these risks, the Bank contracts derivatives, mainly Interest rate Swaps, Cap&Floors, Forex Forward and Credit Default Swaps. On the other hand, the interest and exchange rate risk of loans granted to corporate clients at a fixed rate is generally covered. These coverages, are carried out through Interest Rate Swaps and Cross Currency Swaps. In addition, the Bank manages the interest and exchange risk of debt issues in their various categories (issuing covered bonds, perpetual, subordinated and senior bond) and in different currencies, denominated at fixed rates, and therefore subject to changes in their fair value. These issues are covered through Interest Rate Swaps and Cross Currency Swaps. The Bank's methodology for measuring the effectiveness of this type of coverage is based on comparing the markets value of the hedged items (based on the objective risk of the hedge) and of the hedging instruments in order to analyse whether the changes in the market value of the hedged items are offset by the market value of the hedging instruments, thereby mitigating the hedged risk. Prospectively, the same analysis is performed, measuring the theoretical market values in the event of parallel variations in the market curves of a positive basis point. Finally, the Bank also manages and hedges the interest rate risk of its mortgage portfolio and various variable rate issues in cash flow hedges, which hedge the exposure of flows due to the risk of variations in interest curves, which may have an impact on the income statement. These hedges are made through mainly Interest Rate Swaps. The hypothetical derivative methodology is used to measure the effectiveness of these cash flow hedges, in order to determine the level of risk compensation based on the comparison of the discounted net cash flows of the hedging instruments and the hedged items. Consumer Group entities mainly have loans portfolios at fixed interest rates and are therefore, exposed to changes in fair value due to movements in market interest rates. The entities manage this risk by contracting Interest Rate Swaps in which they pay a fixed rate and receive a variable rate. Interest rate risk is the only one hedged and, therefore, other risks, such as credit risk, are managed but not hedged by the entities. The interest rate risk component is determined as the change in fair value of fixed rate loans arising solely from changes in a reference rate. This strategy is designated as a fair value hedge and its effectiveness is assessed by comparing changes in the fair value of loans attributable to changes in reference interest rates with changes in the fair value of interest rate swaps. In addition, in order to access international markets with the aim of obtaining sources of financing, some Consumer Group´s entities issue fixed rate debt in their own currency and in other currencies that differ from their functional currency. Therefore, they are exposed to changes in both interest rates and exchange rates, which they mitigate with derivatives (Interest Rate Swaps, Fx Forward and Cross Currency Swaps) in which they receive a fixed interest rate and pay a variable interest rate, implemented with a fair value hedge. The cash flow hedges of the Santander Group´s entities hedge the foreign currency risk of loans and financing. Finally, it has hedges of net investments abroad to hedge the foreign exchange risk of the shareholding in NOK and CNY currencies. Banco Santander Mexico has mainly long-term loan portfolios at fixed interest rates, portfolios of short-term deposits in local currency, portfolios of Mexican Government bonds and corporate bonds in currencies other than the local currency and are therefore exposed to changes in fair value due to movements in market interest rates, as well as these latter portfolios also to variations in exchange rates. The entity manages this risk by contracting derivatives (Interest Rate Swaps or Cross Currency Swaps) in which they pay a fixed rate and receive a variable rate. The interest rate is hedged and the exchange risk, if applicable, too. Thus, other risks, such as credit risk, are managed but not hedged by the entities. The interest rate risk component is determined as the change in the fair value of fixed rate loans arising solely from changes in a reference rate. This strategy is designated as a fair value hedge and its effectiveness is assessed by comparing changes in the fair value of loans attributable to changes in benchmark interest rates with changes in the fair value of interest rate swaps. Regarding cash flow hedges, Banco Santander Mexico has a portfolio of unsecured bonds issued at a variable rate in its local currency, which it manages with an Interest Rate Swap in which it receives a variable rate and pays a fixed rate. On the other hand, it also has different items in currencies other than the local currency: unsecured floating rate bonds, commercial bank loans at variable rates, fixed rate issues, Mexican and Brazilian government bonds at fixed rates and loans received in USD from other banks. In all these portfolios, the Bank is exposed to exchange rate variations, which it mitigates by contracting Cross Currency Swaps or FX Forward. Banco Santander Brazil has, on the one hand, fixed-rate government bond portfolios and, therefore, they are exposed to changes in fair value due to movements in market interest rates. The entity manages this risk by contracting derivatives (Interest Rate Swaps or Futures) in which they pay a fixed rate and receive a variable rate. The interest rate risk is the only one hedged and consequently other risks, such as credit risk, are managed but not hedged by the entity. This strategy is designated as a fair value hedge and its effectiveness is evaluated by comparing by linear regression the changes in the fair value of the bonds with the changes in the fair value of the derivatives. On the other hand, as part of the fair value hedge strategy, it has corporate loans in different currencies than the local one and is therefore exposed to changes in fair value due to exchange rates. This risk is mitigated by contracting Cross Currency Swaps. Its effectiveness is evaluated by comparing changes in the fair value of loans attributable to changes in benchmark interest rates with changes in the fair value of derivatives. Finally, it also has a portfolio of long-term Corporate Bonds with inflation-indexed rates. With reference to what it has been mentioned before, they are exposed to variations in market value due to variations in market inflation rates. In order to achieve its mitigation, they contract futures in which they pay the indexed inflation and receive variable interest rates. Its effectiveness is assessed by comparing through lineal regression the changes in the fair value of the bonds to the changes in fair value of the derivatives. In the hedge of cash flows, Banco Santander Brazil has portfolios of loans and government bonds in different currency than the entity´s functional currency and, therefore, it is subject to the risk of changes in currency rates. This exposure will be mitigated by hiring cross currency swaps and futures. Its effectiveness is assessed by comparing changes in fair value of loans and bonds to changes in fair value of such derivatives. Finally, they have a portfolio of variable rate government bonds, so they are exposed to changes in the value due to changes in interest rates. In order to mitigate these changes, a future is hired in which a variable rate is paid and a fixed rate is received. Its effectiveness is assessed by comparing changes in the fair value loans and bonds to changes in the fair value of the futures. In any case, in the event of ineffectiveness in fair value or cash flow hedges, the entity mainly considers the following causes: - - - Regarding net foreign investments hedges, basically, they are allocated in Banco Santander, S.A. and Santander Consumer Finance Group. The Group assumes, as a priority objective in risk management, to minimize – up to a determined limit set up by the responsible for the financial management of the Group- the impact on the calculation of the capital ratio of their permanent investments included within the consolidation perimeter of the Group, and whose shares are legally named in a different currency than the holding has. For this purpose, financial instruments (generally derivatives) on exchange rates are hired, that allow mitigating the impact on the capital ratio of changes in the forward exchange rate. The Group hedges the risk, mainly, for the following currencies: BRL, CLP, MXN, CAD, COP, CNY, GBP, CHF, NOK, USD and PLN. The instruments used to hedge the risk of these investments are Forex Swaps, Forex Forward and buys/sells of spot currencies. In the case of this type of hedge, the ineffectiveness scenarios are considered to be of low probability, given that the hedging instrument is designated considering the determined position and the spot rate at which it is found. The following table sets out the maturity profile of the hedging instruments used in the Group's non-dynamic hedging strategies: December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges: 9,377 17,989 23,773 78,541 49,039 178,719 Interest rate risk 8,436 12,519 21,987 73,989 46,310 163,241 Equity swap — 27 46 36 — 109 Future interest rate 668 2,012 981 2,650 1,391 7,702 Interest rate swap 7,672 10,213 18,423 60,502 32,407 129,217 Call money swap 96 267 1,823 6,967 10,426 19,579 Currency swap — — 714 2,368 1,875 4,957 Swaption — — — 51 — 51 Collar — — — — 15 15 Floor — — — 1,415 196 1,611 Exchange rate risk 17 1,855 1,147 — — 3,019 Fx forward 17 1,855 1,147 — — 3,019 Interest rate and exchange rate risk 924 3,615 639 4,503 2,556 12,237 Interest rate swap 445 1,462 35 710 370 3,022 Call money swap — — — — 20 20 Currency swap 479 2,153 604 3,793 2,166 9,195 Inflation risk — — — — 168 168 Call money swap — — — — 64 64 Currency swap — — — — 104 104 Credit risk — — — 49 5 54 CDS — — — 49 5 54 Cash flow hedges: 18,684 6,994 16,954 62,947 12,821 118,400 Interest rate risk 2,079 2,607 6,971 26,020 552 38,229 Fx forward 49 — — — — 49 Future interest rate 2 — — 125 — 127 Interest rate swap 2,028 2,161 5,957 23,593 217 33,956 Currency swap — 446 839 730 335 2,350 Floor — — 175 1,572 — 1,747 Exchange rate risk 16,166 3,478 5,896 11,984 933 38,457 Future FX and c/v term FV 4,955 — — — — 4,955 FX forward 1,423 — 47 1,813 — 3,283 Future interest rate 4,946 — — — — 4,946 Interest rate swap — — — 1,055 — 1,055 Currency swap 4,842 3,478 5,535 9,116 933 23,904 Floor — — 314 — — 314 Interest rate and exchange rate risk — 8 2,921 21,930 9,524 34,383 Interest rate swap — 8 898 8,456 3,210 12,572 Currency swap — — 2,023 13,474 6,314 21,811 Inflation risk 439 524 566 2,977 1,812 6,318 FX forward — 121 156 137 — 414 Currency swap 439 403 410 2,840 1,812 5,904 Equity risk — — 41 36 — 77 Option — — 41 36 — 77 Other risk — 377 559 — — 936 Future FX and c/v term RF — 377 559 — — 936 Hedges of net investments in foreign operations: 555 777 11,067 9,289 — 21,688 Exchange rate risk 555 777 11,067 9,289 — 21,688 FX forward 555 777 11,067 9,289 — 21,688 28,616 25,760 51,794 150,777 61,860 318,807 Additionally, the profile information of maturities and the price/average rate for the most representative geographies is shown: Santander UK Group December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 6,888 9,403 16,333 44,166 17,498 94,288 Average fixed interest rate (%) GBP 0.633 0.788 1.057 1.586 2.849 Average fixed interest rate (%) USD (0.223) 0.670 0.911 1.085 1.261 Average fixed interest rate (%) EUR 1.513 1.314 1.337 2.684 2.179 Interest rate and foreign exchange rate risk Exchange rate instruments Nominal 877 2,894 — 1,331 585 5,687 Average GBP/EUR exchange rate — — — 1.183 1.168 Average GBP/USD exchange rate 1.580 1.332 — 1.511 — Average fixed interest rate (%) USD — — — 3.888 3.923 Average fixed interest rate (%) EUR 3.615 2.500 — 2.375 7.950 Cash flow hedges Interest rate risk Interest rate instruments Nominal — 1,917 2,225 3,466 — 7,608 Average fixed interest rate (%) GBP — 0.726 0.733 1.334 — Foreign exchange risk Exchange rate instruments Nominal 4,378 2,853 3,310 7,132 — 17,673 Average GBP/JPY exchange rate — 147.215 146.372 145.319 — Average GBP/EUR exchange rate — — 1.280 1.135 — Average GBP/USD exchange rate 1.304 1.307 1.310 1.305 — Interest rate and foreign exchange rate risk Exchange rate instruments Nominal — — 2,859 21,288 9,495 33,642 Average GBP/EUR exchange rate — — 1.252 1.271 1.217 Average GBP/USD exchange rate — — 1.633 1.545 1.511 Average fixed interest rate (%) GBP — — 2.340 2.660 2.900 Banco Santander, S.A. December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 500 665 425 12,987 22,030 36,602 Average fixed interest rate (%) GBP — — — — 7.08 Average fixed interest rate (%) EUR 3.75 0.63 2.06 1.81 3.20 Average fixed interest rate (%) CHF — — 0.76 1.04 Average fixed interest rate (%) USD — — 1.38 3.43 4.11 Foreign exchange risk Exchange rate instruments Nominal — 1,825 771 — — 2,596 Interest rate and foreign exchange rate risk Exchange rate instruments Nominal 41 461 120 2,085 951 3,656 Average fixed interest rate (%) AUD/EUR — — — 4.00 4.80 Average fixed interest rate (%) CZK/EUR — — — 0.86 — Average fixed interest rate (%) EUR/COP — — 7.54 — — Average fixed interest rate (%) HKD/EUR — — — 2.52 — Average fixed interest rate (%) JPY/EUR — — — 0.64 1.28 Average fixed interest rate (%) NOK/EUR — — — — 3.61 Average fixed interest rate (%) USD/COP 6.13 6.71 — 9.47 — Average AUD/EUR exchange rate — — — 1.499 1.499 Average CZK/EUR exchange rate — — — 25.407 26.030 Average EUR/GBP exchange rate — 1.145 — — — Average EUR/COP exchange rate — — 0.0003 — — Average EUR/MXN exchange rate — — — — — Average HKD/EUR exchange rate — — — 8.718 — Average JPY/EUR exchange rate — — — 132.014 125.883 Average MXN/EUR exchange rate — — — 14.696 Average NOK/EUR exchange rate — — — — 9.606 Average USD/BRL exchange rate — — 0.269 — — Average USD/COP exchange rate — 0.0003 0.0003 — 0.0003 Credit Risk Credit risk instruments Nominal — — — 49 5 54 Cash flow hedges Interest rate risk Interest rate instruments Nominal 1,942 — — 6,130 20 8,092 Average fixed interest rate (%) EUR — — — 0.51 0.55 Hedges of net investments in foreign operations Exchange rate instruments Exchange rate instruments Nominal 373 497 10,587 9,289 — 20,746 Average BRL/EUR exchange rate 4.46 — 4.46 4.73 — Average CLP/EUR exchange rate — 766.01 768.25 795.10 — Average CNY/EUR exchange rate — — 8.14 — — Average COP/EUR exchange rate — 3,728.01 3,685.80 — — Average GBP/EUR exchange rate — 0.91 0.89 — — Average MXN/EUR exchange rate 22.98 — 24.51 24.50 — Average PLN/EUR exchange rate — — 4.38 4.26 — Consumer Group December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 253 672 3,488 6,883 63 11,359 Average fixed interest rate (%) EUR (0.197) (0.125) (0.036) (0.065) (0.113) Average fixed interest rate (%) CHF (0.659) (0.696) (0.679) (0.561) — Foreign exchange risk Exchange rate instruments Nominal 17 30 376 — — 423 Average DKK/EUR exchange rate 134.135 — 134.109 — — Average NOK/EUR exchange rate — — 103.232 — — Average CHF/EUR exchange rate — 878.624 887.218 — — Interest rate and foreign exchange rate risk Exchange rate instruments Nominal — 240 339 448 — 1,027 Average SEK/EUR exchange rate — — 0.104 — — Average DKK/EUR exchange rate — 0.134 0.134 0.134 — Average fixed interest rate (%) SEK — — 0.008 — — Average fixed interest rate (%) DKK — 0.002 0.003 0.004 — Cash flow hedges Interest rate risk Interest rate instruments Nominal 85 99 313 423 — 920 Average fixed interest rate (%) EUR 0.183 0.183 0.183 0.183 — Foreign exchange risk Exchange rate instruments Nominal 339 557 2,368 1,061 — 4,325 Average SEK/EUR exchange rate 0.101 0.098 0.099 0.099 — Average NOK/EUR exchange rate 0.108 0.108 0.108 0.108 — Average CHF/EUR exchange rate 0.896 0.859 0.870 0.900 — Average CAD/EUR exchange rate 0.654 0.658 0.652 0.656 — Average DKK/EUR exchange rate 0.134 0.134 0.134 — — Average PLN/EUR exchange rate — — 0.234 0.233 — Average USD/EUR exchange rate — — 0.897 — — Average JPY/EUR exchange rate — — 0.008 0.008 — Hedges of net investments in foreign operations Foreign exchange risk Exchange rate instruments Nominal 181 282 480 — — 943 Average NOK/EUR exchange rate 103.751 103.538 102.963 — — Average CNY/EUR exchange rate — — 121.796 — — Banco Santander Mexico December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal — 1 346 80 — 427 Average fixed interest rate (%) MXN — 5.180 6.907 5.593 — Average fixed interest rate (%) USD — — 1.465 1.465 — Interest rate and foreign exchange rate Exchange and interest rate instruments Nominal — — 41 282 1,009 1,332 Average EUR/MXN exchange rate — — — 20.470 21.890 Average GBP/MXN exchange rate — — — 24.870 25.310 Average USD/MXN exchange rate — — 13.920 13.920 18.390 Average MXV/MXN exchange rate — — 5.059 5.059 5.059 Average fixed interest rate (%) USD — — 8.000 3.980 4.125 Average fixed interest rate (%) EUR — — — 2.420 2.750 Average fixed interest rate (%) GBP — — — — 6.750 Cash flow hedges Interest rate risk Interest rate instruments Nominal — — — 178 — 178 Average fixed interest rate (%) MXN — — — 7.258 — Foreign exchange risk Exchange rate instruments Nominal 1,415 44 56 2,719 103 4,337 Average EUR/MXN exchange rate — — 16.679 18.932 18.688 Average GBP/MXN exchange rate — — — 23.127 25.947 Average USD/MXN exchange rate 18.729 20.289 17.918 16.443 18.508 Average BRL/MXN exchange rate 5.863 — 5.732 5.736 — Banco Santander Brazil December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 668 2,045 — 3,529 1,378 7,620 Average fixed interest rate (%) BRL 9.500 6.967 6.937 10.055 10.030 Foreign exchange rate risk and other Exchange rate instruments Nominal 6 15 36 316 38 411 Average USD/BRL exchange rate 3.247 3.303 3.551 3.642 3.265 Cash flow hedges Interest rate risk Interest rate instruments Nominal 3,877 2,997 3,030 119 — 10,023 Average fixed interest rate (%) BRL 6.500 6.500 6.500 6.500 — Foreign exchange risk and other Exchange rate instruments Nominal — 8 26 — 238 272 Average USD/BRL exchange rate — 3.716 3.648 — 3.135 The following table contains details of the hedged exposures covered by the Group's hedging strategies of December 31, 2018: December 31, 2018 Million of euros Accumulated amount Change in fair of fair value value of hedged Cash flow hedge/currency Carrying amount of adjustments on the ítem for translation reserve hedged items hedged item ineffectiveness Continuing Discontinued Assets Liabilities Assets Liabilities Balance sheet line item assessment hedges hedges Fair value hedges: 110,669 46,830 1,915 (1,765) (20) — — Interest rate risk 104,393 39,251 1,886 (1,478) (74) — — Deposits 5,922 1,195 279 1 Deposits and loans and advances (39) — — Bond 27,235 21,759 792 (791) Debt instruments (35) — — Repo 13,874 561 25 (16) Other assets 18 — — Loans of securitiesa 53,397 175 742 — Loans and advances (186) — — Liquidity facilities 3,965 232 48 (2) Loans and advances 35 — — Issuances assurance — 2,013 — (12) Other assets/liabilities 3 — — Securitisation — 13,316 — (658) Other assets/liabilities 170 — — Equity instruments — — — — Equity instruments (40) — — Exchange rate risk 3,378 — 5 — (3) — — Deposits 1,614 — 9 — Deposits and loans and advances 8 — — Bonds 1,764 — (4) — Debt instruments (11) — — Interest and Exchange rate risk 2,776 7,474 21 (287) 53 — — Borrowed deposits 751 — 19 — Deposits and loans and advances 16 — — Bonds 1,591 3,571 2 (26) Debt instruments (31) — — Securitisation — 3,358 — (262) Other assets/liabilities 67 — — Repos 434 99 — 1 Other assets/liabilities 1 — — CLO — 446 — — Other assets/liabilities — — — Inflation risk 68 105 3 1 4 — — Deposits — 105 — 1 Deposits and loans and advances 1 — — Bonds 68 — 3 — Debt instruments 3 — — Credit risk 54 — — — — — — Bonds 54 — — — Debt instruments — — — Cash flow hedges (432) 447 (10) Interest rate risk (52) 131 (12) Firm commitment Other assets/liabilities (24) (75) — Deposits Deposits and loans and advances (26) 47 — Governmenclasst bonds Debt instruments (13) 92 — Liquidity facilities Loans and advances 8 65 (12) Secondary market loans Other assets/liabilities 4 2 — Senior securitization Other assets/liabilities (1) — — Exchange rate risk (416) (23) 2 Deposits Other assets/liabilities 83 (8) — Bonds Deposits and loans and advances (309) (16) 2 Secondary market loans Loans and advances (179) (21) — Senior titulisation Other assets/liabilities (11) 21 — CLO Other assets/liabilities — 1 — Interest and Exchange rate risk 4 341 — Deposits Deposits and loans and advances 7 2 — Bonds Debt instruments (13) (9) — Securitisation Other assets/liabilities 10 348 — Inflation risk 15 22 — Deposits Deposits and loans and advances 25 25 — Bonds Debt instruments (3) (3) — Liquidity facilities Loans and advances (7) — — Equity risk 17 (4) — Highly likely scheduled transactions Other assets/liabilities 17 (4) — Other risks — (20) — Bonds Other assets/liabilities — (20) — Net foreign investments hedges 792 — 10 — — — — Exchange rate risk 792 — 10 — — — — Firm commitment 13 — — — Other assets/liabilities — — — Equity instruments 779 — 10 — Equity instruments — — — 111,461 46,830 1,925 (1,765) (452) 447 (10) The cumulative amount of adjustments of the fair value hedging instruments that remain in the balance for covered items that are no longer adjusted by profit and loss of coverage as of December 31, 2018 is EUR 71 million euros. The net impact of the coverages are shown in the following table: Million of euros 2018 Earnings/ Reclassified amount of reserves to the income statement due to: (losses) Ineffective Cover recognised in coverage transaction another recognised in affecting the cumulative the income Line of the income statement that includes income overall result statement the ineffectiveness of cash flows statement Line of the income statement that includes reclassified items Fair value hedges 75 Interest rate risk (18) Deposits (24) Gains or losses of financial assets/liabilities Bonds (61) Gains or losses of financial assets/liabilities Repo 1 Gains or losses of financial assets/liabilities Loans of fixed-income securities 46 Gains or losses of financial assets/liabilities Liquidity lines 12 Gains or losses of financial assets/liabilities Securitisations 8 Gains or losses of financial assets/liabilities Risk of interest rate and exchange rate 95 Deposits 39 Gains or losses of financial assets/liabilities Bonds 8 Gains or losses of financial assets/liabilities Securitisations 49 Gains or losses of financial assets/liabilities CLO (1) Gains or losses of financial assets/liabilities Other Risks (2) Securitisations (2) Gains or losses of financial assets/liabilities Cash flow hedges 200 8 553 Risk of interest rate 193 (4) 39 Firm Commitment (2) — Gains or losses of financial assets/liabilities (24) Interest margin Deposits 50 (21) Gains or losses of financial assets/liabilities (4) Interest margin Bonds 104 2 Gains or losses of financial assets/liabilities 17 Interest margin/ Gains or losses of financial assets/liabilities Loans secondary markets 85 16 Gains or losses of financial assets/liabilities 47 Interest margin/ Gains or losses of financial assets/liabilities Liquidity lines 2 — Gains or losses of financial assets/liabilities 3 Interest margin Repo (46) — Gains or losses of financial assets/liabilities — Interest margin Securitisations — (1) Gains or losses of financial assets/liabilities — Risk of Exchange rate (20) (688) (457) Deposits (25) (698) Gains or losses of financial assets/liabilities (563) Interest margin/ Gains or losses of financial assets/liabilities Asset bonds (25) 43 Gains or losses of financial assets/liabilities 89 Interest margin/ Gains or losses of financial assets/liabilities Repo — — Gains or losses of financial assets/liabilities (3) Gains or losses of financial assets/liabilities Loans secondary markets 5 4 Gains or losses of financial assets/liabilities 48 Interest margin/ Gains or losses of financial assets/liabilities Securitisations 24 (37) Gains or losses of financial assets/liabilities (36) Interest margin / Gains or losses of financial assets/liabilities CLO 1 — Gains or losses of financial assets/liabilities 8 Interest margin / Gains or losses of financial assets/liabilities Risk of interest rate and exchange rate 45 700 967 Deposits 1 743 Gains or losses of financial assets/liabilities 778 Interest margin Bonds (4) 447 Gains or losses of financial assets/liabilities 571 Interest margin/ Gains or losses of financial assets/liabilities Securitisations 48 (490) Gains or losses of financial assets/liabilities (382) Interest

Discontinued operations

Discontinued operations	12 Months Ended
	Dec. 31, 2018
Discontinued operations
Discontinued Operations	37. Discontinued operations No operations were discontinued in 2018, 2017 or 2016.

Interest income

Interest income	12 Months Ended
	Dec. 31, 2018
Interest income.
Interest income	38. Interest income Interest and similar income in the consolidated income statement comprises the interest accruing in the year on all financial assets with an implicit or explicit return, calculated by applying the effective interest method, irrespective of measurement at fair value; and the rectifications of income as a result of hedge accounting. Interest is recognised gross, without deducting any tax withheld at source. The detail of the main interest and similar income items earned in 2018, 2017 and 2016 is as follows: Million of euros 2018 2017 2016 Loans and advances, central banks 1,320 1,881 2,090 Loans and advances, credit institutions 1,555 1,840 2,388 Debt instruments 6,429 7,141 6,927 Loans and advances, customers 43,489 43,640 42,578 Other interest 1,532 1,539 1,173 54,325 56,041 55,156 Most of the interest and similar income was generated by the Group’s financial assets that are measured either at amortised cost or at fair value through Other comprehensive income.

Interest expense

Interest expense	12 Months Ended
	Dec. 31, 2018
Interest expense.
Interest expense	39. Interest expense Interest expense and similar charges in the consolidated income statement includes the interest accruing in the year on all financial liabilities with an implicit or explicit return, including remuneration in kind, calculated by applying the effective interest method, irrespective of measurement at fair value; the rectifications of cost as a result of hedge accounting; and the interest cost attributable to provisions recorded for pensions. The detail of the main items of interest expense and similar charges accrued in 2018, 2017 and 2016 is as follows: Million of euros 2018 2017 2016 Central banks deposits 421 216 127 Credit institution deposits 2,597 2,045 1,988 Customer deposits 9,062 11,074 12,886 Debt securities issued and subordinated liabilities 6,073 6,651 7,767 Marketable debt securities 5,303 5,685 6,822 Subordinated liabilities (Note 23) 770 966 945 Provisions for pensions (Note 25) 186 198 201 Other interest 1,645 1,561 1,098 19,984 21,745 24,067 Most of the interest expense and similar charges was generated by the Group’s financial liabilities that are measured at amortised cost.

Dividend income

Dividend income	12 Months Ended
	Dec. 31, 2018
Dividend income Abstract
Dividend income	40. Dividend income Dividend income includes the dividends and payments on equity instruments out of profits generated by investees after the acquisition of the equity interest. The detail of Income from dividends as follows: Million of euros 2018 (*) 2017 2016 Dividend income classified as: Financial assets held for trading 241 234 217 Non-trading financial assets mandatorily at fair value through profit or loss 23 — — Financial assets available-for-sale — 150 196 Financial assets at fair value through other comprehensive income 106 — — 370 384 413 (*) See further detail regarding the impacts of the entry into force of IFRS9 as of January 1, 2018 (Note 1.b).

Income from companies accounted

Income from companies accounted for using the equity method	12 Months Ended
	Dec. 31, 2018
Income from companies accounted for using the equity method abstract
Income from companies accounted for using the equity method	41. Income from companies accounted for using the equity method Income from companies accounted for using the equity method comprises the amount of profit or loss attributable to the Group generated during the year by associates and joint ventures. The detail of Income from companies accounted for using the equity method is as follows: Million of euros 2018 2017 2016 Zurich Santander Insurance América, S.L. 194 241 223 Wizink Bank, S.A. 56 36 — Allianz Popular, S.L. 45 15 — Companhia de Crédito, Financiamento e Investimento RCI Brasil 21 19 12 SAM Investment Holdings Limited — 87 79 Other entities 421 306 130 737 704 444

Commission income

Commission income	12 Months Ended
	Dec. 31, 2018
Commission income
Commission income	42. Commission income Commission income comprises the amount of all fees and commissions accruing in favour of the Group in the year, except those that form an integral part of the effective interest rate on financial instruments. The detail of Fee and commission income is as follows: Million of euros 2018 2017 2016 Coming from collection and payment services: Bills 334 368 295 Demand accounts 1,371 1,490 1,191 Cards 3,514 3,515 2,972 Orders 475 449 431 Cheques and other 138 154 133 5,832 5,976 5,022 Coming from non-banking financial products: Investment funds 1,024 751 696 Pension funds 124 92 86 Insurance 2,433 2,517 2,428 3,581 3,360 3,210 Coming from Securities services: Securities underwriting and placement 283 374 282 Securities trading 251 302 287 Administration and custody 458 359 297 Asset management 305 251 201 1,297 1,286 1,067 Other: Foreign exchange 546 471 353 Financial guarantees 549 559 505 Commitment fees 291 283 286 Other fees and commissions 2,568 2,644 2,500 3,954 3,957 3,644 14,664 14,579 12,943

Commission expense

Commission expense	12 Months Ended
	Dec. 31, 2018
Commission expense
Commission expense	43. Commission expense Commission expense shows the amount of all fees and commissions paid or payable by the Group in the year, except those that form an integral part of the effective interest rate on financial instruments. The detail of Fee and commission expense is as follows: Million of euros 2018 2017 2016 Commissions assigned to third parties 1,972 1,831 1,639 Cards 1,358 1,391 1,217 By collection and return of effects 11 12 11 Other fees assigned 603 428 411 Other commissions paid 1,207 1,151 1,124 Brokerage fees on lending and deposit transactions 42 49 47 Sales of insurance and pension funds 232 205 204 Other fees and commissions 933 897 873 3,179 2,982 2,763

Gains or losses on financial as

Gains or losses on financial assets and liabilities	12 Months Ended
	Dec. 31, 2018
Gains or losses on financial assets and liabilities
Gains or losses on financial assets and liabilities	44. Gains or losses on financial assets and liabilities Gains/losses on financial assets and liabilities includes the amount of the Other comprehensive income of financial instruments, except those attributable to interest accrued as a result of application of the effective interest method and to allowances, and the gains or losses obtained from the sale and purchase thereof. a) The detail, by origin, of Gains/losses on financial assets and liability: Million of euros 2018 (*) 2017 2016 Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net (IFRS9) 604 — — Financial assets at amortised cost 39 — — Other financial assets and liabilities 565 — — Of which: debt instruments 563 — — Of which: equity instruments — — — Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net (IAS39) — 404 869 Of which financial assets available for sale 472 861 Of which: debt instruments 316 464 Of which: equity instruments — 156 397 Gains or losses on financial assets and liabilities held for trading, net (**) 1,515 1,252 2,456 Gains or losses on non-trading financial assets and liabilities mandatory at fair value through profit or loss 331 — — Gains or losses on financial assets and liabilities measured at fair value through profit or loss, net (**) (57) (85) 426 Gains or losses from hedge accounting, net 83 (11) (23) 2,476 1,560 3,728 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Includes the net result obtained by transactions with debt securities, equity instruments, derivatives and short positions included in this portfolio when the Group jointly manages its risk in these instruments. As explained in Note 45, the above breakdown should be analysed in conjunction with the exchange differences, net: Million of euros 2018 2017 2016 Exchange differences, net (679) 105 (1,627) b) The detail of the amount of the asset balances is as follows: Million of euros 2018 2017 2016 Loans and receivables: 56,323 40,875 40,390 Central banks 9,226 — — Credit institutions 23,099 11,585 13,290 Customers 23,998 29,290 27,100 Debt instruments 36,609 39,836 52,320 Equity instruments 12,198 22,286 15,043 Derivatives 55,939 57,243 72,043 161,069 160,240 179,796 The Group mitigates and reduces this exposure as follows: - With respect to derivatives, the Group has entered into framework agreements with a large number of credit institutions and customers for the netting-off of asset positions and the provision of collateral for non-payment. At December 31, 2018 the actual credit risk exposure of the derivatives was EUR 33,289 million. - Loans and advances to credit institutions and Loans and advances to customers included reverse repos amounting to EUR 33,837 million at December 31, 2018. Also, mortgage-backed assets totalled EUR 1,334 million. - Debt instruments include EUR 27,720 million of Spanish and foreign government securities. At December 31, 2018 the amount of the change in the year in the fair value of financial assets at fair value through profit or loss attributable to variations in their credit risk (spread) was not material. The detail of the amount of the liability balances is as follows: Million of euros 2018 2017 2016 Deposits 65,304 84,724 48,863 Central banks 14,816 9,142 10,463 Credit institutions 10,891 18,458 5,059 Customer 39,597 57,124 33,341 Marketable debt securities 2,305 3,056 2,791 Short positions 15,002 20,979 23,005 Derivatives 55,341 57,892 74,369 Other financial liabilities 449 589 — 138,401 167,240 149,028 At December 31, 2018, the amount of the change in the fair value of financial liabilities at fair value through profit or loss attributable to changes in their credit risk during the year is not material.

Exchange differences, net

Exchange differences, net	12 Months Ended
	Dec. 31, 2018
Exchange differences, net
Exchange differences, net	45. Exchange differences, net Exchange differences shows basically the gains or losses on currency dealings, the differences that arise on translations of monetary items in foreign currencies to the functional currency, and those disclosed on non-monetary assets in foreign currency at the time of their disposal. The Group manages the currencies to which it is exposed together with the arrangement of derivative instruments and, accordingly, the changes in this line item should be analysed together with those recognised under Gains/losses on financial assets and liabilities (see Note 44).

Other operating income and expe

Other operating income and expenses	12 Months Ended
	Dec. 31, 2018
Other operating income and expenses
Other operating income and expenses	46. Other operating income and expenses Other operating income and Other operating expenses in the consolidated income statements include: Million of euros 2018 2017 2016 Insurance activity 51 57 63 Income from insurance and reinsurance contracts issued 3,175 2,546 1,900 Of which: Insurance and reinsurance premium income 3,011 2,350 1,709 Reinsurance income (Note 15) 164 196 191 Expenses of insurance and reinsurance contracts (3,124) (2,489) (1,837) Of which: Claims paid, other insurance-related expenses and net provisions for insurance contract liabilities (2,883) (2,249) (1,574) Reinsurance premiums paid (241) (240) (263) Other operating income 1,643 1,618 1,919 Non- financial services 367 472 698 Other operating income 1,276 1,146 1,221 Other operating expense (2,000) (1,966) (1,977) Non-financial services (270) (302) (518) Other operating expense: (1,730) (1,664) (1,459) Of which, credit institutions deposit guarantee fund and single resolution fund (895) (848) (711) (306) (291) 5 Most of the Bank’s insurance activity is carried on in life insurance.

Personnel expenses

Personnel expenses	12 Months Ended
	Dec. 31, 2018
Average headcount and number of offices
Personnel expenses	47. Personnel expenses a ) Breakdown The detail of Personnel expenses is as follows: Million of euros 2018 2017 2016 Wages and salaries 8,824 8,879 8,133 Social Security costs 1,412 1,440 1,291 Additions to provisions for defined benefit pension plans (Note 25) 84 88 81 Contributions to defined contribution pension funds 287 271 266 Other Personnel expenses 1,258 1,369 1,233 11,865 12,047 11,004 b) The average number of employees in the Group, by professional category, was as follows: Average number of employees 2018 2017 2016 The Bank: Senior management (*) 22 64 76 Other line personnel 30,399 21,327 20,291 Clerical staff (**) — — 1,904 General services personnel (**) — — 13 30,421 21,391 22,284 Rest of Spain 7,944 12,703 6,925 Santander UK plc 18,757 19,079 19,428 Banco Santander (Brasil) S.A. 46,645 46,210 48,052 Other companies (***) 98,062 96,349 94,946 201,829 195,732 191,635 (*) During 2018, categories of deputy assistant executive vice president and above were erased. (**) During 2017, clerical staff and general services personnel categories were erased considering all the staff in the aforementioned categories on the other line personnel category. (***) Does not include staff affected by discontinued operations. The number of employees, at the end of 2018, 2017 and 2016, was 202,713, 202,251 and 188,492, respectively. The functional breakdown (final employment), by gender, at December 31, 2018 is as follows: Functional breakdown by gender Senior executives Other executives Other personnel Men Women Men Women Men Women Continental Europe 913 260 6,735 3,711 26,173 32,759 Latin America and Others 523 100 6,427 4,256 40,729 54,952 United Kingdom 107 39 1,309 640 9,218 13,862 1,543 399 14,471 8,607 76,120 101,573 The same information, expressed in percentage terms at December 31, 2018, is as follows: Functional breakdown by gender Senior executives Other executives Other personnel Men Women Men Women Men Women Continental Europe 78 % 22 % 64 % 36 % 44 % 56 % Latin America and Others 84 % 16 % 60 % 40 % 43 % 57 % United Kingdom 73 % 27 % 67 % 33 % 40 % 60 % 79 % 21 % 63 % 37 % 43 % 57 % The labour relations between employees and the various Group companies are governed by the related collective agreements or similar regulations. The number of employees in the Group with disabilities, distributed by professional categories, at December 31, 2018, is as follows: Average number of employees (*) 2018 Senior management 6 Other management 64 Other staff 3,366 3,436 (*) An employee with disabilities is considered to be a person who is recognised by the State or the company in each jurisdiction where the Group operates and that entitles them to receive direct monetary assistance, or other types of aid such as, for example, reduction of their taxes. In the case of Spain, employees with disabilities have been considered to be those with a degree of disabilities greater than or equal to 33%. The amount does not include employees in the United States. The number of Group employees with disabilities at 2017 and 2016, was 3,289 and 2,941, respectively, (not including the United States). Likewise, the average number of employees of Banco Santander, S.A. with disabilities, equal to or greater than 33%, during 2018 was 241 (209 and 216 employees during 2017 and 2016). At the end of fiscal year 2018, there were 304 employees (211 and 213 employees at December 31, 2017 and 2016). c) The main share-based payments granted by the Group in force at December 31, 2018, 2017 and 2016 are described below. i. Bank The variable remuneration policy for the Bank’s executive directors and certain executive personnel of the Bank and of other Group companies includes Bank share-based payments, the implementation of which requires, in conformity with the law and the Bank’s Bylaws, specific resolutions to be adopted by the general meeting. Were it necessary or advisable for legal, regulatory or other similar reasons, the delivery mechanisms described below may be adapted in specific cases without altering the maximum number of shares linked to the plan or the essential conditions to which the delivery thereof is subject. These adaptations may involve replacing the delivery of shares with the delivery of cash amounts of an equal value. The plans that include share-based payments are as follows: (i) deferred conditional delivery share plan; (ii) deferred conditional variable remuneration plan, (iii) performance share plan and (iv) Deferred variable compensation plan linked to multiannual objectives. The characteristics of the plans are set forth below: Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (i) Deferred and conditional variable remuneration plan (2013) The purpose of this plan is to defer a portion of the variable remuneration of the beneficiaries over a period of three years for it to be paid in Santander shares. Group executives or employees whose variable remuneration or annual bonus for 2013 exceeded, in general, EUR 0.3 million (gross) In addition to that of the beneficiary remaining in the Group's employ, that none of the following circumstances should occur in the period prior to each deliveries: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) Significant changes in the Group’s economic capital or risk profile. The amount in shares is calculated based on the tranches of the following scale: - 300 thousand euros or less 0% deferred - 300 to 600 thousand euros 20% deferred - More than 600 thousand euros 30% deferred. Deferral period: 3 years. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (ii) Deferred conditional variable remuneration plan (2013, 2014, 2015, 2016, 2017 and 2018) The purpose of these cycles is to defer a portion of the variable remuneration of the beneficiaries over a period of three years for the third (2013), fourth (2014), sixth (2016) cycles, and over three or five years for the fifth (2015), seventh (2017) and eight (2018) cycles, for it to be paid, where appropriate, in cash and in Santander shares; the other portion of the variable remuneration is also to be paid in cash and Santander shares, upon commencement of the cycles, in accordance with the rules set forth below. Executive directors and certain executives (including senior management) and employees who assume risk, who perform control functions or receive an overall remuneration which puts them on the same remuneration level as senior executives and employees who assume risks (Fifth, fourth and third cycle) In the case of the seventh, sixth and eight cycle, the beneficiaries are Material Risk Takers (Identified staff) that are not beneficiaries of the Deferred Multiyear Objectives Variable Remuneration Plan. For the third, fourth, fifth and sixth cycles (2013 to 2016), the accrual of deferred compensation is conditioned, in addition to the requirement that the beneficiary remains in the Group's employ, with the exceptions included in the plan regulations upon none of the following circumstances existing during the period prior to each of the deliveries, pursuant to the provisions set forth in each case in the plan regulations: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) Significant changes in the Group’s economic capital or risk profile In the case of the seventh and eight cycles (2017 and 2018), the accrual of deferred compensation is conditioned, in addition to the permanence of the beneficiary in the Group, with the exceptions contained in the plan's regulations, to no assumptions in which there is a poor performance of the entity as a whole or of a specific division or area of the entity or of the exposures generated by the personnel, and at least the following factors must be considered: (i) significant failures in risk management committed by the entity , or by a business unit or risk control unit; (ii) the increase suffered by the entity or by a business unit of its capital needs, not foreseen at the time of generation of the exposures; (iii) Regulatory sanctions or judicial sentences for events that could be attributable to the unit or the personnel responsible for those. Also, the breach of internal codes of conduct of the entity; and (iv) Irregular behaviours, whether individual or collective, considering in particular the negative effects derived from the marketing of inappropriate products and the responsibilities of the persons or bodies that made those decisions. Paid half in cash and half in shares Third cycle (2013), 3 years deferral: - Executive directors: 40% and 60% immediate and deferred payments, respectively. - Division directors and other executives of the Group with a similar profile: 50% and 50% immediate and deferred payments, respectively. - Other Executives part of the Identified Staff: 40% and 60%, immediate and deferred payments, respectively. Fourth and fifth cycles (2014 and 2015, respectively): - Executive directors and members of the Identified Staff with total variable remuneration higher than 2.6 million euros: 40% paid immediately and 60% deferred over 5 years (3 years in fourth cycle). - - Other beneficiaries: 60% paid immediately and 40% deferred over 3 years. Sixth cycle (2016): - 60% of bonus will be paid immediately and 40% deferred over a three year period. Seventh and eight cycle (2017 and 2018): - Executive Directors and members of identified staff with target total variable remuneration higher or equal to 2.7 million euros: 40% paid immediately and 60% deferred over 5 years - Executive Directors and members of identified staff with total Variable remuneration between 1.7 million euros and 2.7 million euros: 50% paid immediately and 50% paid over 5 years - Other beneficiaries: 60% paid immediately and 40% deferred over 3 years. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (iii) Performance share plan (2014 and 2015) The purpose is to instrument a portion of the variable remuneration of the executive directors and other members of the Identified Staff, consisting of a long-term incentive (ILP) in shares based on the Bank's performance over a multiannual period. In addition, the second cycle (2015) also applies to other Bank employees not included in the Identified Staff or Material Risk Takers, in respect of whom it is deemed appropriate that the potential delivery of Bank shares be included in their remuneration package in order to better align the employee's interests with those of the Bank. Executive Directors and senior managers Other Material Risk Takers or Identified Staff Other beneficiaries in the case only of the second cycle. In addition to the requirement that the beneficiary remains in the Group's employ, with the exceptions included in the plan regulations, the delivery of shares to be paid on the ILP payment date based on compliance with the related multiannual target is conditional upon none of the following circumstances existing during the period prior to each of the: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) For the second cycle (2015), based on the maximum benchmark value (20%), at the proposal of the remuneration committee, the Board of Directors will set the maximum number of shares, the value in euros of which is called the "Agreed-upon Amount of the ILP", taking into account (i) the Group's earnings per share (EPS) and (ii) the Group's return on tangible equity (RoTE) for 2015 with respect to those budgeted for the year. First cycle (2014): - Second cycle (2015), the basis of calculation is the fulfilment of the following objectives: - - - - - - Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (iv) Deferred Multiyear Objectives Variable Remuneration Plan (2016, 2017 and 2018) The aim is simplifying the remuneration structure, improving the ex ante risk adjustment and increasing the impact of the long-term objectives on the Group's most relevant roles. The purpose of these cycles is to defer a portion of the variable remuneration of the beneficiaries over a period of three or five years, for it to be paid, where appropriate, in cash and in Santander shares; the other portion of the variable remuneration is also to be paid in cash and Santander shares, upon commencement of the cycles, in accordance with the rules set forth below. The accrual of the last third of the deferral (in the case of 3 years deferral) of the last three fifths (in the case of 5 years deferral) is also subject to long-term objectives. Executive directors, senior management and certain executives of the most relevant roles in the Group. In 2016 (first cycle), the accrual is conditioned, in addition to the permanence of the beneficiary in the Group, with the exceptions contained in the plan's regulations that none of The following circumstances during the period prior to each of the deliveries in the terms set forth in each case in the plan's regulations: (i) Poor performance of the Group; (ii) breach by the beneficiary of the internal regulations, including in particular that relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when appropriate under a change in accounting regulations; Or (iv) Significant changes in the Group's economic capital or risk profile. In 2017 and 2018 (second and third cycles), the accrual is conditioned, in addition to the beneficiary permanence in the Group, with the exceptions contained in the plan's regulations, to the non-occurrence of instances of poor financial performance from the entity as a whole or of a specific division or area thereof or of the exposures generated by the personnel, at least the following factors must be considered: (i) Significant failures in risk management committed by the entity, or by a business unit or risk control unit; (ii) the increase suffered by the entity or by a business unit of its capital needs, not foreseen at the time of generation of the exposures; (iii) Regulatory sanctions or court rulings for events that could be attributable to the unit or the personnel responsible for those. Also, the breach of internal codes of conduct of the entity; and (iv) Irregular behaviours, whether individual or collective, considering in particular negative effects derived from the marketing of inappropriate products and responsibilities of persons or bodies that made those decisions. First cycle (2016): - Executive directors and members of the Identified Staff with total variable remuneration higher than or equal to 2.7 million euros: 40% paid immediately and 60% deferred over a 5 year period. - Senior managers, country heads of countries representing at least 1% of the Group´s capital and other members of the identified staff whose total variable remuneration is between 1.7 million and 2.7 million euros: 50% paid immediately and 50% deferred over a 5 year period. - Other beneficiaries: 60% paid immediately and 40% deferred over a 3 year period. The second and third cycles (2017 and 2018, respectively) are under the same deferral rules, save for the variable remuneration considered is target and not the actual award. In 2016 the metrics for the deferred portion subject to long-term objectives are: - Earnings per share (EPS) growth in 2018 over 2015. - Relative Total Shareholder Return (TSR) measured against a group of credit institutions. - Compliance with the fully-loaded common equity tier 1 (“CET1”) ratio target for financial year 2018. - Compliance with Santander Group’s underlying return on risk-weighted assets (“RoRWA”) growth target for financial year 2018 compared to financial year 2015. In 2017 (second cycle) and 2018 (third cycle) the metrics for the deferred portion subject to long-term objectives are: - EPS growth in 2019 over 2016 and in 2020 over 2017, for each respective cycle - Relative Total Shareholder Return (TSR) measured against a group of 17 credit institutions.in the periods 2017-2019 and 2018.-2019, respectively. - Compliance with the fully-loaded common equity tier 1 (“CET1”) ratio target for financial years 2019 and 2020, respectively. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base Paid half in cash and half in shares. The maximum number of shares to be delivered is calculated by taking into account the weighted average daily volume of weighted average prices for the fifteen trading sessions prior to the previous Friday (excluding) on the date on which the board decides the bonus for the Executive directors of the Bank. ii. Santander UK plc The long-term incentive plans on shares of the Bank granted by management of Santander UK plc to its employees are as follows: Exercise Date of Date of Number of price in Number of commencement expiry of shares (in pounds Year Employee persons of exercise exercise thousand) sterling (*) granted group (**) period period Plans outstanding at 01/01/16 24,762 Options granted (Sharesave) 17,296 4.91 Employments 7,024 11/01/16 11/01/19 11/01/16 11/01/21 Options exercised (338) 3.67 Options cancelled (net) or not exercised (12,804) 3.51 Plans outstanding at 12/31/16 28,916 Options granted (Sharesave) 3,916 4.02 Employments 4,260 11/01/17 11/01/20 11/01/17 11/01/22 Options exercised (1,918) 3.77 Options cancelled (net) or not exercised (3,713) 3.40 Plans outstanding at 12/31/17 27,201 Options granted (Sharesave) 6,210 3.46 Employments 4,880 11/01/18 11/01/21 11/01/18 11/01/23 Options exercised (3,340) 3.16 Options cancelled (net) or not exercised (3,233) 3.76 Plans outstanding at 12/31/18 26,838 (*) At December 31, 2018, 2017, 2016 and 2015, the euro/pound sterling exchange rate was EUR 1.11790 GBP 1; EUR 1.12710 GBP 1, EUR 1.16798 GBP 1 and EUR 1.36249 GBP 1, respectively. (**) Number of accounts/contracts. A single employee may have more than one account/contract. In 2008 the Group launched a voluntary savings scheme for Santander UK employees (Sharesave Scheme) whereby employees who join the scheme in 2016, 2017 and 2018 see deducted between GBP 5 and GBP 500 from their net monthly pay over a period of three or five years. When this period has ended, the employees may use the amount saved to exercise options on shares of the Bank at an exercise price calculated by reducing by up to 20% the average purchase and sale prices of the Bank shares in the three trading sessions prior to the approval of the scheme by the UK tax authorities (HMRC). This approval must be received within 21 to 41 days following the publication of the Group’s results for the first half of the year. This scheme was approved by the Board of Directors, at the proposal of the appointments and remuneration committee, and, since it involved the delivery of Bank shares, its application was authorized by the Annual General Meeting held on June 21, 2008. Also, the scheme was authorized by the UK tax authorities (HMRC) and commenced in September 2008. In subsequent years, at the Annual General Meetings held on June 19, 2009, June 11, 2010, June 17, 2011, March 28, 2012, March 22, 2013, March 28, 2014, March 27, 2015, March 18, 2016, April 7, 2017, and March 23, 2018, respectively, the shareholders approved the application of schemes previously approved by the board and with similar features to the scheme approved in 2008. iii. Fair value The fair value of the performance share plans was calculated as follows: a) Deferred variable compensation plan linked to multi-year objectives 2016, 2017 and 2018: The Group calculates at the grant date the fair value of the plan based on the valuation report of an independent expert, Willis Towers Watson. According to the design of the plan for 2016, 2017 and 2018 and the levels of achievement of similar plans in comparable entities, the expert concludes that the reasonable range for estimating the initial achievement ratio is around 60% - 80%. It has been considered that the fair value is 70% of the maximum. b) 2015 Performance share plan: The Group calculates at the grant date the fair value of this plan relying in part upon the report of an independent expert. On the basis of the design of the plan for 2015 and the levels of achievement of similar plans at comparable entities, the expert concluded that the reasonable range for estimating the initial achievement coefficient was approximately 60% to 80% and, accordingly, the fair value was considered to be 70% of the maximum. Therefore, as the maximum level was determined as being 91.50%, the fair value is 64.05% of the maximum amount. c) Performance share plans 2014: - It was assumed that the beneficiaries will not leave the Group’s employ during the term of each plan. - The Group calculates at the grant date the fair value of the Bank’s relative TSR position relying in part upon the report of an independent expert whose assessment was carried out using a Monte Carlo valuation model to perform 10,000 simulations to determine the TSR of each of the companies in the benchmark group, taking into account the variables set forth below. The results (each of which represents the delivery of a number of shares) are classified in decreasing order by calculating the weighted average and discounting the amount at the risk-free interest rate. PI14 Expected volatility (*) 51.35 % Annual dividend yield based on last few years 6.06 % Risk-free interest rate (Treasury Bond yield (zero coupon) over the period of the plan) 4.073 % (*) Calculated on the basis of historical volatility over the corresponding period (three years). The application of the simulation model resulted in a percentage value of 55.39% for Plan l-14. Since this valuation refers to a market condition, it cannot be adjusted after the grant date. d) Santander UK Sharesave plans: The fair value of each option granted by Santander UK was estimated at the grant date using a European/American Partial Differential Equation model with the following assumptions: 2018 2017 2016 Risk-free interest rate 1.27% ‑ 1.40% 0.89% ‑ 1.08 % 0.31% ‑ 0.41 % Dividend increase 5.6% ‑ 6.12% 5.48% ‑ 5.51 % 5.92% ‑ 6.21 % Implied volatility of underlying shares based on expected life of the options 23.99% ‑ 24.17% 26.16% ‑ 26.31 % 31.39% ‑ 32.00 % Expected life of options granted 3 and 5 years 3 and 5 years 3 and 5 years

Other general administrative ex

Other general administrative expenses	12 Months Ended
	Dec. 31, 2018
Other general administrative expenses
Other general administrative expenses	48. Other general administrative expenses a) The detail of Other general administrative expenses is as follows: Million of euros 2018 2017 2016 Property, fixtures and supplies 1,968 1,931 1,853 Technology and systems 1,550 1,257 1,095 Technical reports 707 759 768 Advertising 646 757 691 Taxes other than income tax 557 583 484 Communications 527 529 499 Surveillance and cash courier services 405 443 389 Per diems and travel expenses 225 217 232 Insurance premiums 76 78 69 Other administrative expenses 1,828 1,799 1,653 8,489 8,353 7,733 b) Technical reports includes the fees paid by the various Group companies (detailed in the accompanying Appendices) for the services provided by their respective auditors, the detail being as follows: Million of euros 2018 2017 2016 Audit fees 90.0 88.1 73.7 Audit-related fees 6.5 6.7 7.2 Tax fees 0.9 1.3 0.9 All other fees 3.4 3.1 3.6 Total 100.8 99.2 85.4 The Audit fees heading includes audit fees for the Banco Santander, S.A. individual and consolidated financial statements, as the case may be, of the companies forming part of the Group, the integrated audits prepared for the annual report filling in the Form 20-F required by the U.S. Securities and Exchange Commission (SEC) for those entities currently required to do so, the internal control audit (SOX) for those required entities, the audit of the consolidated financial statements as of 30 June and limited quarterly consolidated reviews for the Brazilian regulator as of March 31, June 30 and September 30 and the regulatory reports required by the auditor corresponding to the different locations of the Santander Group. The main concepts included in Audit-related fees correspond to aspects such as the issuance of Comfort letters, or other reviews required by different regulations in relation to aspects such as, for example, Securitization. The services commissioned from the Group's auditors meet the independence requirements stipulated by the Audit Law, the US SEC rules and the Public Company Accounting Oversight Board (PCAOB), applicable to the Group, and they did not involve in any case the performance of any work that is incompatible with the audit function. Lastly, the Group commissioned services from audit firms other than PwC amounting to EUR 173.9 million in 2018 (2017: EUR 115.6 million; 2016: EUR 127.9 million, respectively). The "Audit Fees" caption includes the fees corresponding to the audit for the year, regardless of the date on which the audit was completed. In the event of subsequent adjustments, which will not be significant in any case, and for purposes of comparison, they are presented in this note in the year to which the audit relates. The rest of the services are presented according to the date of their approval by the Audit Committee. c) Number of branches The number of offices at December 31, 2018 and 2017 is as follow: Group Number of branches 2018 2017 Spain 4,427 4,546 Group 8,790 9,151 13,217 13,697

Gains or losses on non-financia

Gains or losses on non-financial assets and investments, net	12 Months Ended
	Dec. 31, 2018
Gain Loss On Disposal Of Assets Not Held For Sale [Abstract]
Gains or losses on non-financial assets and investments, net	49. Gains or losses on non financial assets, net The detail of Gains/ (losses) on disposal of assets not classified as non-current assets held for sale is as follow: Million of euros 2018 2017 2016 Gains: Tangible and intangible assets 124 134 131 Investments 2 443 30 Of which: Allfunds Bank, S.A. (Note 3) — 425 — 126 577 161 Losses: Tangible and intangible assets (92) (43) (116) Investments (6) (12) (15) (98) (55) (131) 28 522 30

Gains or losses on non-current

Gains or losses on non-current assets held for sale not classified as discontinued operations	12 Months Ended
	Dec. 31, 2018
Non-current assets held for sale
Gains or losses on non-current assets held for sale not classified as discontinued operations	50. Gains or losses on non-current assets held for sale not classified as discontinued operations The detail of Gains/(losses) on non-current assets held for sale not classified as discontinued operations is as follows: Million of euros Net balance 2018 2017 2016 Tangible assets (123) (195) (141) Impairment (Note 12) (259) (306) (212) Gain (loss) on sale (Note 12) 136 111 71 Other gains and other losses — (8) — (123) (203) (141)

Other disclosures

Other disclosures	12 Months Ended
	Dec. 31, 2018
Other disclosures
Other disclosures	51. Other disclosures a) The detail, by maturity, of the balances of certain items in the consolidated balance sheet is as follows: December 31, 2018 (*) Million of euros Average On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 interest demand month months months years years years Total rate Assets: Cash, cash balances at Central Banks and other deposits on demand 113,663 — — — — — — 113,663 0.61 % Financial assets at fair value through other comprehensive income 1,886 6,023 3,329 12,873 19,432 10,705 64,172 118,420 Debt instruments 487 6,022 3,328 12,830 19,415 10,661 64,076 116,819 3.13 % Loans and advances 1,399 1 1 43 17 44 96 1,601 Customers 1,399 1 1 43 17 44 96 1,601 1.41 % Financial assets at amortised cost 46,247 56,818 71,627 102,036 134,697 107,921 426,753 946,099 Debt instruments 16 1,534 1,319 6,646 2,474 1,783 23,924 37,696 3.33 % Loans and advances 46,231 55,284 70,308 95,390 132,223 106,138 402,829 908,403 Central banks — 23 — 4 — — 15,574 15,601 4.63 % Credits institutions 10,092 5,389 6,711 6,003 5,314 947 1,024 35,480 1.66 % Customers 36,139 49,872 63,597 89,383 126,909 105,191 386,231 857,322 4.97 % 161,796 62,841 74,956 114,909 154,129 118,626 490,925 1,178,182 4.20 % Liabilities: Financial liabilities at amortised cost 545,284 87,782 93,293 127,522 182,670 56,927 78,152 1,171,630 — Deposits 536,134 74,440 67,406 91,958 107,459 18,833 6,871 903,101 Central banks 304 2,130 2,629 507 64,433 2,520 — 72,523 0.39 % Credit institutions 15,341 13,413 24,724 16,384 8,759 6,412 4,646 89,679 2.19 % Customer deposits 520,489 58,897 40,053 75,067 34,267 9,901 2,225 740,899 1.19 % Marketable debt securities (**) 237 11,347 18,817 33,536 71,805 37,919 70,653 244,314 2.59 % Other financial liabilities 8,913 1,995 7,070 2,028 3,406 175 628 24,215 545,284 87,782 93,293 127,522 182,670 56,927 78,152 1,171,630 1.48 % Difference (assets less liabilities) (383,488) (24,941) (18,337) (12,613) (28,541) 61,699 412,773 6,552 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Includes promissory notes, certificates of deposit and other short-term debt issues. The Group’s net borrowing position with the ECB was EUR 11,882 million at December 31, 2018, mainly because in last period the Group borrowed funds under the ECB's targeted longer-term refinancing operations (LTRO, TLTRO) programme. (See note 20). December 31, 2017 Million of euros Average On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 interest demand month months months years years years Total rate Assets: Cash, cash balances at central banks and other deposits on demand 110,995 — — — — — — 110,995 0.53 % Financial assets available-for-sale 326 2,467 1,646 11,497 22,447 11,164 78,934 128,481 — Debt instruments 326 2,467 1,646 11,497 22,447 11,164 78,934 128,481 4.34 % Loans and receivables 57,000 58,686 53,218 96,689 119,541 112,786 405,093 903,013 Debt instruments 249 1,381 997 2,073 2,317 1,656 8,870 17,543 3.06 % Loans and advances 56,751 57,305 52,221 94,616 117,224 111,130 396,223 885,470 — Central banks — 3,948 1,446 4,811 — — 16,073 26,278 5.10 % Credits institutions 18,242 4,198 3,445 5,708 5,694 939 1,341 39,567 1.26 % Customers 38,509 49,159 47,330 84,097 111,530 110,191 378,809 819,625 5.44 % Held-to-maturity investments — — — 1,902 122 294 11,173 13,491 1.52 % 168,321 61,153 54,864 110,088 142,110 124,244 495,200 1,155,980 4.61 % Liabilities: Financial liabilities at amortised cost 537,604 75,161 87,939 130,672 136,487 83,542 74,664 1,126,069 — Deposits 527,499 59,325 66,667 100,658 81,169 39,719 8,283 883,320 Central banks 450 2,015 681 2,715 42,988 22,565 — 71,414 0.24 % Credit institutions 20,870 15,263 13,350 25,406 6,501 5,247 4,663 91,300 2.40 % Customer deposits 506,179 42,047 52,636 72,537 31,680 11,907 3,620 720,606 2.00 % Marketable debt securities (*) 105 11,927 11,638 29,286 54,202 43,395 64,357 214,910 2.56 % Other financial liabilities 10,000 3,909 9,634 728 1,116 428 2,024 27,839 — 537,604 75,161 87,939 130,672 136,487 83,542 74,664 1,126,069 1.98 % Difference (assets less liabilities) (369,283) (14,008) (33,075) (20,584) 5,623 40,702 420,536 29,911 — (*) Includes promissory notes, certificates of deposit and other short-term debt issues. December 31, 2016 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 Average demand month months months years years years Total interest rate Assets: Cash, cash balances at central banks and other deposits on demand 76,454 — — — — — — 76,454 0.98 % Financial assets available-for-sale 200 5,986 2,007 5,442 23,574 13,900 60,178 111,287 Debt instruments 200 5,986 2,007 5,442 23,574 13,900 60,178 111,287 4.33 % Loans and receivables 52,512 48,420 56,725 85,521 113,387 93,816 389,623 840,004 Debt instruments 248 1,628 708 2,246 2,125 1,918 4,364 13,237 6.31 % Loans and advances 52,264 46,792 56,017 83,275 111,262 91,898 385,259 826,767 Central banks — 941 11,499 1,117 — 23 14,393 27,973 6.54 % Credits institutions 16,632 4,938 2,210 2,220 4,435 1,268 3,721 35,424 1.96 % Customers 35,632 40,913 42,308 79,938 106,827 90,607 367,145 763,370 5.79 % Held-to-maturity investments — — — 123 2,075 342 11,928 14,468 1.70 % 129,166 54,406 58,732 91,086 139,036 108,058 461,729 1,042,213 5.12 % Liabilities: Financial liabilities at amortised cost 480,075 95,583 67,282 125,774 115,591 69,467 90,468 1,044,240 Deposits 471,494 79,446 42,583 86,006 69,775 34,505 7,837 791,646 Central banks 422 2,007 633 101 20,027 20,922 — 44,112 0.26 % Credit institutions 16,649 16,357 10,603 23,313 13,540 5,560 3,742 89,764 3.97 % Customer deposits 454,423 61,082 31,347 62,592 36,208 8,023 4,095 657,770 2.25 % Marketable debt securities (*) 642 12,861 14,225 39,465 43,985 34,520 80,380 226,078 3.68 % Other financial liabilities 7,939 3,276 10,474 303 1,831 442 2,251 26,516 480,075 95,583 67,282 125,774 115,591 69,467 90,468 1,044,240 2.57 % Difference (assets less liabilities) (350,909) (41,177) (8,550) (34,688) 23,445 38,591 371,261 (2,027) (*) Includes promissory notes, certificates of deposit and other short-term debt issues. The detail of the undiscounted contractual maturities of the existing financial liabilities at amortised cost at December 31, 2018 is as follows: December 31, 2018 (*) Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 532,915 74,320 67,169 91,766 106,935 18,439 6,540 898,084 Central banks 304 2,126 2,624 896 64,424 2,520 — 72,894 Credit institutions 15,257 13,413 24,698 16,288 8,552 6,085 4,427 88,720 Customer 517,354 58,781 39,847 74,582 33,959 9,834 2,113 736,470 Marketable debt securities 296 11,243 17,359 33,443 71,431 37,409 69,352 240,533 Other financial liabilities 8,913 1,995 7,070 2,028 3,406 175 628 24,215 542,124 87,558 91,598 127,237 181,772 56,023 76,520 1,162,832 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). December 31, 2017 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 526,059 57,490 89,249 99,780 64,977 32,365 8,157 878,077 Central banks 451 2,018 23,801 2,719 27,138 15,385 — 71,512 Credit institutions 20,378 14,903 13,035 24,807 6,348 5,123 4,553 89,147 Customer 505,230 40,569 52,413 72,254 31,491 11,857 3,604 717,418 Marketable debt securities 1,486 11,735 11,387 28,412 52,989 42,888 63,648 212,545 Other financial liabilities 10,001 3,908 9,634 728 1,116 428 2,024 27,839 537,546 73,133 110,270 128,920 119,082 75,681 73,829 1,118,461 December 31, 2016 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 467,529 95,231 49,246 68,830 66,255 34,781 7,765 789,637 Central banks 422 2,006 633 101 20,021 20,916 — 44,099 Credit institutions 16,676 15,789 15,500 20,057 12,364 5,517 3,736 89,639 Customer 450,431 77,436 33,113 48,672 33,870 8,348 4,029 655,899 Marketable debt securities 623 13,582 12,705 38,119 42,201 34,022 78,094 219,346 Other financial liabilities 7,939 3,645 10,097 305 1,837 442 2,251 26,516 476,091 112,458 72,048 107,254 110,293 69,245 88,110 1,035,499 Below is a breakdown of contractual maturities for the rest of financial assets and liabilities as of December 31, 2018: Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total FINANCIAL ASSETS Financial assets held for trading 4,512 3,564 6,793 22,084 19,350 36,576 92,879 Derivatives 2,691 3,165 899 15,189 14,098 19,897 55,939 Equity instruments — — — — — 8,938 8,938 Debt instruments 1,821 399 5,894 6,895 5,252 7,539 27,800 Loans and advances — — — — — 202 202 Credits institutions — — — — — — — Customers — — — — — 202 202 Financial assets designated at fair value through profit or loss 21,598 13,045 5,625 5,215 4,065 7,912 57,460 Debt instruments 604 7 304 727 348 1,232 3,222 Loans and advances 20,994 13,038 5,321 4,488 3,717 6,680 54,238 Central banks 1,211 5,433 2,582 — — — 9,226 Credit institutions 14,587 4,131 778 1,327 579 1,695 23,097 Customers 5,196 3,474 1,961 3,161 3,138 4,985 21,915 Non-trading financial assets mandatorily at fair value through profit or loss 3,215 346 17 125 2 7,025 10,730 Equity instruments — — — — — 3,260 3,260 Debt instruments 1,876 20 — — 2 3,689 5,587 Loans and advances 1,339 326 17 125 — 76 1,883 Central banks — — — — — — — Credits institutions 2 — — — — — 2 Customers 1,337 326 17 125 — 76 1,881 Financial assets at fair value through other comprehensive income — — — — — 2,671 2,671 Equity instruments — — — — — 2,671 2,671 Hedging derivatives 609 166 474 2,167 957 4,234 8,607 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 106 7 20 28 59 868 1,088 TOTAL FINANCIAL ASSETS 30,040 17,128 12,929 29,619 24,433 59,286 173,435 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total FINANCIAL LIABILITIES Financial liabilities held for trading 10,473 3,351 1,104 16,123 16,457 22,835 70,343 Derivatives 2,897 2,874 822 14,323 14,956 19,469 55,341 Shorts positions 7,576 477 282 1,800 1,501 3,366 15,002 Deposits — — — — — — — Central banks — — — — — — — Credits institutions — — — — — — — Customers — — — — — — — Marketable debt securities — — — — — — — Other financial liabilities — — — — — — — Financial liabilities designated at fair value through profit or loss 29,574 7,017 864 1,497 999 28,107 68,058 Deposits 29,522 6,947 627 531 455 27,222 65,304 Central banks 9,804 4,940 72 — — — 14,816 Credits institutions 8,809 949 271 188 229 445 10,891 Customers 10,909 1,058 284 343 226 26,777 39,597 Marketable debt securities 13 70 237 556 544 885 2,305 Other financial liabilities 39 — — 410 — — 449 Hedging derivatives 485 144 321 362 651 4,400 6,363 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 3 5 23 64 60 148 303 TOTAL FINANCIAL LIABILITIES 40,535 10,517 2,312 18,046 18,167 55,490 145,067 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total Memorandum items Loans commitment granted 71,860 12,436 22,749 35,632 43,205 32,201 218,083 Financial guarantees granted 2,100 1,737 4,437 1,728 1,029 692 11,723 Other commitments granted 58,431 1,486 6,174 2,650 3,503 2,145 74,389 MEMORANDUM ITEMS 132,391 15,659 33,360 40,010 47,737 35,038 304,195 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). In the Group’s experience, no outflows of cash or other financial assets take place prior to the contractual maturity date that might affect the information broken down above. b) The detail of the main foreign currency balances in the consolidated balance sheet, based on the nature of the related items, is as follows: Equivalent value in million of euros 2018 (*) 2017 2016 Assets Liabilities Assets Liabilities Assets Liabilities Cash, cash balances at central banks and other deposits on demand 61,372 — 67,025 — 60,423 — Financial assets/liabilities held for trading 56,217 40,989 82,004 76,459 100,083 70,958 Non-trading financial assets mandatorily at fair value through profit or loss 8,231 — — — — — Other financial assets/liabilities at fair value through profit or loss 32,244 35,997 7,322 21,766 6,965 16,667 Financial assets/liabilities available-for-sale — — 65,691 — 68,370 — Financial assets at fair value through other comprehensive income 67,926 — — — — — Financial assets at amortised cost 598,629 — — — — — Loans and receivables — — 553,301 — 571,829 — Investments held-to-maturity — — 11,490 — 12,272 — Investments 1,189 — 1,121 — 1,308 — Tangible assets 19,903 — 15,971 — 16,957 — Intangible assets 23,016 — 23,499 — 26,338 — Financial liabilities at amortised cost — 694,362 — 638,680 — 678,542 Liabilities under insurance contracts — 29 — 58 — 61 Other 24,506 20,567 23,695 20,989 27,961 23,169 893,233 791,944 851,119 757,952 892,506 789,397 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). c) The financial assets owned by the Group are measured at fair value in the accompanying consolidated balance sheet, except for cash, cash balances at central banks and other deposits on demand, loans and advances at amortised cost (IFRS9) and the loans and receivables, held-to-maturity investments, equity instruments whose market value cannot be estimated reliably and derivatives that have these instruments as their underlyings and are settled by delivery thereof (IAS39). Similarly, the Group’s financial liabilities -except for financial liabilities held for trading, those measured at fair value and derivatives other than those having as their underlying equity instruments whose market value cannot be estimated reliably- are measured at amortised cost in the accompanying consolidated balance sheet. Following is a comparison of the carrying amounts of the Group’s financial instruments measured at other than fair value and their respective fair values at year-end: i) Financial assets measured at other than fair value Million of euros 2018 2017 2016 Carrying Fair Carrying Fair Carrying Fair Assets amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 Loans and advances 908,403 914,013 — 88,091 825,922 885,470 895,645 — 141,839 753,806 826,767 833,819 — 127,224 706,595 Debt instruments 37,696 38,095 20,898 11,246 5,951 31,034 31,094 10,994 13,688 6,412 27,705 27,417 11,529 11,678 4,210 946,099 952,108 20,898 99,337 831,873 916,504 926,739 10,994 155,527 760,218 854,472 861,236 11,529 138,902 710,805 ii) Financial liabilities measured at other than fair value Million of euros 2018 2017 2016 Carrying Fair Carrying Fair Carrying Fair Liabilities amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 Deposits 903,101 902,680 — 302,414 600,266 883,320 883,880 — 177,147 706,733 791,646 792,172 — 90,271 701,901 Debt instruments and other financial liabilities 268,529 271,226 72,945 143,153 55,128 242,749 248,891 52,896 139,301 56,694 252,594 255,758 43,306 186,356 26,096 1,171,630 1,173,906 72,945 445,567 655,394 1,126,069 1,132,771 52,896 316,448 763,427 1,044,240 1,047,930 43,306 276,627 727,997 The main valuation methods and inputs used in the estimates at December 31, 2018 of the fair values of the financial assets and liabilities in the foregoing table were as follows: · Loans and receivables: the fair value was estimated using the present value method. The estimates were made considering factors such as the expected maturity of the portfolio, market interest rates, spreads on newly approved transactions or market spreads -when available-. · Held-to-maturity investments: the fair value was calculated based on market prices for these instruments. · Financial liabilities at amortised cost: i) Deposits: the fair value of short term deposits was taken to be their carrying amount. Factors such as the expected maturity of the transactions and the Group’s current cost of funding in similar transactions are consider for the estimation of long term deposits fair value. It had been used also current rates offered for deposits of similar remaining maturities. ii) Marketable debt securities and subordinated liabilities: the fair value was calculated based on market prices for these instruments -when available- or by the present value method using market interest rates and spreads, as well as using any significant input which is not observable with market data if applicable. The fair value of cash, cash balances at central banks and other deposits on demand was taken to be their carrying amount since they are mainly short-term balances. In addition, at December 31, 2017 and 2016, equity instruments amounting to EUR 1,211 million and EUR 1,349 million, respectively, (See note 2.d) recognised as Financial assets available-for-sale (IAS39) were measured at cost in the consolidated balance sheet because it was not possible to estimate their fair value reliably, since they related to investments in entities not listed on organised markets and, consequently, the non-observable inputs were significant. d) The detail at December 31, 2018, 2017 and 2016, by type of financial instrument, of the Group’s sovereign risk exposure to Europe’s peripheral countries and of the short positions held with them, taking into consideration the criteria established by the European Banking Authority (EBA) (See note 54) is as follows: Sovereign risk by country of issuer/borrower at December 31, 2018 (**) Million of euros (*) Debt instruments MtM Derivatives (****) Financial assets held for trading and Non-trading financial Financial financial assets assets at fair assets designated at value through mandatorily Financial Loans and fair value other at fair value assets at advances to Total net through profit Short comprehensive through amortised customers direct Indirect risk or loss positions income profit or loss cost (***) exposure Direct risk (CDS)s Spain 3,601 (2,458) 27,078 — 7,804 13,615 49,640 407 — Portugal 72 (115) 4,794 — 277 3,725 8,753 — — Italy 477 (681) — — 385 80 261 87 — Ireland — — — — — — — 2 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Information prepared under EBA standards. Also, there are government debt instruments on insurance companies balance sheets amounting to EUR 13,364 million (of which EUR 11,529 million, EUR 1,415 million, EUR 418 million and EUR 2 million relate to Spain, Portugal, Italy and Ireland, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 5,622 million (of which EUR 4,870 million, EUR 366 million and EUR 386 million to Spain, Portugal and Italy, respectively). (***) Presented without taking into account the valuation adjustments recognised (EUR 34 million). (****) “Other than CDSs" refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. Sovereign risk by country of issuer/borrower at December 31, 2017 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and Total net fair value assets Held-to- advances to direct through profit Short available Loans and maturity customers exposure Other than or loss positions for sale receivables investments (**) (****) CDSs CDSs Spain 6,940 (2,012) 37,748 1,585 1,906 16,470 62,637 (21) — Portugal 208 (155) 5,220 232 3 3,309 8,817 — — Italy 1,962 (483) 4,613 — — 16 6,108 (5) 5 (*) Information prepared under EBA standards. Also, there are government debt securities on insurance companies' balance sheets amounting to EUR 11,673 million (of which EUR 10,079 million, EUR 1,163 million and EUR 431 million relate to Spain, Portugal and Italy, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 3,596 million (EUR 3,010 million, EUR 146 million and EUR 440 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the Other comprehensive income recognised (EUR 31 million). (***) “Other than CDSs" refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. (****) EUR 19,601 million were included within the direct exposures of the balance sheet mainly from debt securities of Grupo Banco Popular. Sovereign risk by country of issuer/borrower at December 31, 2016 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and fair value assets Held-to- advances to Total net through profit Short available- Loans and maturity customers direct Other than or loss positions for-sale receivables investments (**) exposure CDSs CDSs Spain 8,943 (4,086) 23,415 1,516 1,978 14,127 45,893 (176) — Portugal 154 (212) 5,982 214 4 930 7,072 — — Italy 2,211 (758) 492 — — 7 1,952 (2) 2 (*) Information prepared under EBA standards. Also, there are government debt securities on insurance companies’ balance sheets amounting to EUR 10,502 million (of which EUR 9,456 million, EUR 717 million and EUR 329 million relate to Spain, Portugal and Italy, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 5,449 million (EUR 5,349 million, EUR 91 million and EUR 9 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the Other comprehensive income recognised (EUR 27 million). (***) Other than CDSs refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. CDSs refers to the exposure to CDSs based on the location of the underlying. The detail of the Group's other exposure to other counterparties (private sector, central banks and other public entities that are not considered to be sovereign risks) in the aforementioned countries at December 31, 2018, 2017 and 2016 is as follows: Exposure to other counterparties by country of issuer/borrower at December 31, 2018 (****) Million of euros (*) Debt instruments Derivatives (***) Financial assets Financial assets at held for trading and fair value through Non-trading financial Loans and Balances Reverse financial assets other assets mandatorily at fair Financial assets advances to Total net with central repurchase designated at comprehensive value through profit or at amortised customers direct Other than banks agreements FVTPL income loss cost (**) exposure CDSs CDSs Spain 42,655 8,117 412 1,760 320 2,662 202,149 258,075 3,880 (6) Portugal 1,369 — 11 90 — 3,821 33,596 38,887 1,132 — Italy 51 6,296 84 635 — — 10,830 17,896 253 — Greece — — — — — — 80 80 28 — Ireland — — 21 1,093 16 25 10,633 11,788 127 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 76,691 million, EUR 8,158 million, EUR 5,193 million, EUR 200 million and EUR 850 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (***) Presented without taking into account valuation adjustments or impairment corrections (EUR 9,385 million). (****) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. Exposure to other counterparties by country of issuer/borrower at December 31, 2017 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and Total net Balances Reverse fair value assets Investments advances to direct with central repurchase through profit available-for- Loans and held-to- customers exposure Other than banks agreements or loss sale receivables maturity (*) (****) CDSs CDSs Spain 36,091 6,932 623 4,784 2,880 — 210,976 262,286 2,299 2 Portugal 761 178 160 764 4,007 106 35,650 41,626 1,416 — Italy 17 2,416 438 1,010 — — 10,015 13,896 211 5 Greece — — — — — — 56 56 30 — Ireland — — 20 476 584 — 1,981 3,061 79 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 81,072 million, EUR 8,936 million, EUR 4,310 million, EUR 200 million and EUR 714 million, of which Grupo Banco Popular EUR 15,460 million, to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented excluding Other comprehensive income and impairment losses recognised (EUR 10,653 million of which around EUR 3,986 of Grupo Banco Popular). (***) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. (****) EUR 83,625 million were included within the direct exposures of the balance sheet mainly from debt securities of Grupo Banco Popular. Exposure to other counterparties by country of issuer/borrower at December 31, 2016 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and Financial assets designated at Financial Loans and Balances Reverse fair value assets Investments advances to Total net with central repurchase through profit available-for- Loans and held-to- customers direct Other than banks agreements or loss sale receivables maturity (*) exposure CDSs CDSs Spain 9,640 8,550 1,223 4,663 711 — 147,246 172,033 2,977 (16) Portugal 655 — 84 426 3,936 240 28,809 34,150 1,600 — Italy 26 — 818 732 — — 6,992 8,568 161 6 Greece — — — — — — 47 47 34 — Ireland — — 45 396 77 — 985 1,503 690 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 64,522 million, EUR 6,993 million, EUR 3,364 million, EUR 268 million and EUR 369 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented excluding Other comprehensive income and impairment losses recognised (EUR 8,692 million). (***) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. Following is certain information on the notional amount of the CDSs at December 31, 2018, 2017 and 2016 detailed in the foregoing tables: 12/31/18 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 151 382 (231) (2) (4) (6) Portugal Sovereign 26 26 — — — — Other — — — — — — Italy Sovereign — 265 (265) — — — Other 205 75 130 (5) 5 — 12/31/17 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 324 499 (175) (3) 5 2 Portugal Sovereign 25 128 (103) (1) 1 — Other 1 1 — — — — Italy Sovereign 25 450 (425) — 5 5 Other 225 201 24 (3) 8 5 12/31/16 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 534 751 (217) (3) (13) (16) Portugal Sovereign 28 290 (262) 1 (1) — Other — 6 (6) — — — Italy Sovereign 78 503 (425) — 2 2 Other 317 362 (45) (1) 7 6

Geographical and business segme

Geographical and business segment reporting	12 Months Ended
	Dec. 31, 2018
Geographical and business segment reporting
Geographical and business segment reporting	52. Geographical and business segment reporting The segment reporting is based on financial information presented to the chief operating decision maker, which excludes certain items included in the statutory results that distort year-on-year comparisons and are not considered for management reporting purposes. This financial information (“underlying basis”) is computed by adjusting reported results for the effects of certain gains and losses (e.g.: capital gains, write-downs, etc.). These gains and losses are items that management and investors ordinarily identify and consider separately to understand better the underlying trends in the business. The Group has aligned the information in this operating segment Note in a manner consistent with the underlying information used internally for management reporting purposes and with that presented throughout the Group’s other public documents. The Group executive committee has been determined to be the chief operating decision maker for the Group. The Group’s operating segments reflect its organisational and management structures. The Group executive committee reviews the Group’s internal reporting based around these segments in order to assess performance and allocate resources. The segments are differentiated by the geographical area where profits are earned and by type of business. The financial information of each reportable segment is prepared by aggregating the figures for the Group’s various geographic areas and business units. a) This primary level of segmentation, which is based on the Group's management structure, comprises five reportable segments: four operating areas plus the corporate centre. The operating areas, which include all the business activities carried on therein by the Group, are: Continental Europe, the United Kingdom, Latin America and the United States, based on the location of the Group's assets. The Continental Europe area encompasses all the business activities carried on in the region. The United Kingdom area includes the business activities carried on by the various Group units and branches with a presence in the UK. The Latin America area includes all the financial activities carried on by the Group through its banks and subsidiaries in the region. The United States area includes the holding company (SHUSA) and the businesses of Santander Bank, National Association, Santander Consumer USA Holdings Inc., Banco Santander Puerto Rico, Banco Santander International's specialised unit and the New York branch. The Group has considered the aggregation criteria of IFRS8 for purposes of identifying these reportable geographical segments. The corporate centre segment includes the centralised management business relating to financial investments, financial management of the structural currency position, within the remit of the Group's corporate asset and liability management committee, and management of liquidity and equity through issues. With regard to the balance sheet, due to the required segregation of the various business units (included in a single consolidated balance sheet), the amounts lent and borrowed between the units are shown as increases in the assets and liabilities of each business. These amounts relating to intra-Group liquidity are eliminated and are shown in the Intra-Group eliminations column in the table below in order to reconcile the amounts contributed by each business unit to the consolidated Group's balance sheet. There are no customers located in any of the areas that generate income exceeding 10% of Total income. The condensed balance sheets and income statements of the various geographical segments are as follows: Million of euros 2018 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 681,887 349,353 303,356 135,043 139,634 (150,002) 1,459,271 Loans and advances to customers 383,020 257,284 150,544 85,564 6,509 — 882,921 Cash, balances at central banks and credit institutions and other deposits on demand 142,813 39,843 60,721 16,442 6,141 (68,891) 197,069 Debt instruments 89,030 29,190 59,367 13,160 377 — 191,124 Other financial assets (*) 36,012 13,398 14,994 4,292 2,112 — 70,808 Other asset accounts (**) 31,012 9,638 17,730 15,585 124,495 (81,111) 117,349 Total Liabilities 642,479 332,137 276,095 118,532 51,557 (68,890) 1,351,910 Customer deposits 369,730 210,388 142,576 57,568 234 — 780,496 Central banks and credit institutions 158,762 33,429 48,103 16,504 1 (68,890) 187,909 Marketable debt securities 62,018 67,556 37,698 37,564 41,783 — 246,619 Other financial liabilities (***) 37,142 16,583 36,851 3,098 1,333 — 95,007 Other liabilities accounts (****) 14,827 4,181 10,867 3,798 8,206 — 41,879 Total Equity 39,408 17,216 27,261 16,511 88,077 (81,112) 107,361 Other customer funds under management 69,219 7,672 78,194 2,763 7 — 157,855 Investment funds 48,030 7,576 71,439 512 7 — 127,564 Pension funds 11,062 — 98 — — — 11,160 Assets under management 10,127 96 6,657 2,251 — — 19,131 Other non-managed marketed Customer funds 28,555 — 128 13,528 — — 42,211 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. Million of euros 2017 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 678,122 361,230 293,347 114,388 132,099 (134,881) 1,444,305 Loans and advances to customers 380,081 243,616 147,929 71,963 5,326 — 848,915 Cash, balances at central banks and credit institutions and other deposits on demand 114,965 56,762 56,087 13,300 400 (53,089) 188,425 Debt instruments 99,728 26,188 57,824 13,843 1,768 — 199,351 Other financial assets (*) 39,918 24,690 14,226 3,368 2,117 — 84,319 Other asset accounts (**) 43,430 9,974 17,281 11,914 122,488 (81,792) 123,295 Total Liabilities 636,784 344,926 264,415 99,189 45,247 (53,089) 1,337,472 Customer deposits 352,549 230,504 143,266 51,189 222 — 777,730 Central banks and credit institutions 159,794 27,833 39,613 15,884 279 (53,089) 190,314 Marketable debt securities 61,214 61,112 34,435 26,176 35,029 — 217,966 Other financial liabilities (***) 45,919 21,167 36,085 2,503 1,625 — 107,299 Other liabilities accounts (****) 17,308 4,310 11,016 3,437 8,092 — 44,163 Total Equity 41,338 16,304 28,932 15,199 86,852 (81,792) 106,833 Other customer funds under management 74,314 8,657 80,732 2,871 — — 166,574 Investment funds 52,319 8,543 74,435 452 — — 135,749 Pension funds 11,566 — — — — — 11,566 Assets under management 10,429 114 6,297 2,419 — — 19,259 Other non-managed marketed Customer funds 27,790 — 47 13,561 — — 41,398 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. Million of euros 2016 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 520,134 354,960 320,768 137,391 132,154 (126,282) 1,339,125 Loans and advances to customers 297,214 251,251 152,187 85,389 4,429 — 790,470 Cash, balances at central banks and credit institutions and other deposits on demand 77,232 36,643 67,400 16,970 2,640 (47,744) 153,141 Debt instruments 80,639 28,045 63,314 17,940 1,374 — 191,312 Other financial assets (*) 40,689 26,819 18,696 3,566 2,803 — 92,573 Other asset accounts (**) 24,360 12,202 19,171 13,526 120,908 (78,538) 111,629 Total Liabilities 486,644 337,945 291,454 120,741 47,387 (47,745) 1,236,426 Customer deposits 269,934 212,113 143,747 64,460 857 — 691,111 Central banks and credit institutions 105,152 21,590 47,585 22,264 552 (47,745) 149,398 Marketable debt securities 53,064 71,108 47,436 26,340 30,921 — 228,869 Other financial liabilities (***) 49,042 27,913 41,395 2,907 2,633 — 123,890 Other liabilities accounts (****) 9,452 5,221 11,291 4,770 12,424 — 43,158 Total Equity 33,490 17,015 29,314 16,650 84,767 (78,537) 102,699 Other customer funds under management 65,834 8,564 81,034 3,828 — — 159,260 Investment funds 46,229 8,446 74,554 701 — — 129,930 Pension funds 11,298 — — — — — 11,298 Assets under management 8,307 118 6,480 3,127 — — 18,032 Other non-managed marketed Customer funds 7,790 — 448 14,999 10 — 23,247 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. The condensed income statements for the geographical segments are as follows: Million of euros 2018 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 10,107 4,136 15,654 5,391 (947) 34,341 Net fee income 4,419 1,023 5,253 859 (69) 11,485 Gains (losses) on financial transactions (*) 915 199 600 72 11 1,797 Other operating income (**) 441 62 (306) 627 (23) 801 Total income 15,882 5,420 21,201 6,949 (1,028) 48,424 Administrative expenses, depreciation and amortisation (8,279) (2,995) (7,995) (3,015) (495) (22,779) Net operating income (***) 7,603 2,425 13,206 3,934 (1,523) 25,645 Net loan-loss provisions (****) (1,399) (173) (4,567) (2,618) (116) (8,873) Other gains (losses) and provisions (*****) (703) (326) (667) (199) (100) (1,995) Operating profit/(loss) before tax 5,501 1,926 7,972 1,117 (1,739) 14,777 Tax on profit (1,461) (539) (2,904) (347) 21 (5,230) Profit from continuing operations 4,040 1,387 5,068 770 (1,718) 9,547 Net profit from discontinued operations — — — — — — Consolidated profit 4,040 1,387 5,068 770 (1,718) 9,547 Non-controlling interests 397 25 840 218 3 1,483 Attributable profit to the parent 3,643 1,362 4,228 552 (1,721) 8,064 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release EUR 113 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2017 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 9,230 4,364 15,984 5,569 (851) 34,296 Net fee income 4,167 1,003 5,494 971 (38) 11,597 Gains (losses) on financial transactions (*) 626 282 1,014 9 (227) 1,704 Other operating income (**) 394 67 30 410 (104) 797 Total income 14,417 5,716 22,522 6,959 (1,220) 48,394 Administrative expenses, depreciation and amortisation (7,661) (2,862) (8,720) (3,198) (476) (22,917) Net operating income (***) 6,756 2,854 13,802 3,761 (1,696) 25,477 Net loan-loss provisions (****) (1,109) (205) (4,972) (2,780) (45) (9,111) Other gains (losses) and provisions (*****) (746) (465) (1,330) (90) (182) (2,813) Operating profit/(loss) before tax 4,901 2,184 7,500 891 (1,923) 13,553 Tax on profit (1,316) (661) (2,386) (256) 31 (4,588) Profit from continuing operations 3,585 1,523 5,114 635 (1,892) 8,965 Net profit from discontinued operations — — — — — — Consolidated profit 3,585 1,523 5,114 635 (1,892) 8,965 Non-controlling interests 383 25 817 227 (3) 1,449 Attributable profit to the parent 3,202 1,498 4,297 408 (1,889) 7,516 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2016 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 8,161 4,405 13,345 5,917 (739) 31,089 Net fee income 3,497 1,031 4,581 1,102 (31) 10,180 Gains (losses) on financial transactions (*) 818 319 806 22 (242) 1,723 Other operating income (**) 330 61 32 492 (53) 862 Total income 12,806 5,816 18,764 7,533 (1,065) 43,854 Administrative expenses, depreciation and amortisation (6,781) (2,967) (7,692) (3,197) (450) (21,087) Net operating income (***) 6,025 2,849 11,072 4,336 (1,515) 22,767 Net loan-loss provisions (****) (1,342) (58) (4,911) (3,208) 1 (9,518) Other gains (losses) and provisions (*****) (671) (340) (785) (90) (74) (1,960) Operating profit/(loss) before tax 4,012 2,451 5,376 1,038 (1,588) 11,289 Tax on profit (1,083) (735) (1,362) (357) 141 (3,396) Profit from continuing operations 2,929 1,716 4,014 681 (1,447) 7,893 Net profit from discontinued operations — — — — — — Consolidated profit 2,929 1,716 4,014 681 (1,447) 7,893 Non-controlling interests 330 36 628 286 (8) 1,272 Attributable profit to the parent 2,599 1,680 3,386 395 (1,439) 6,621 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. b) At this secondary level of segment reporting, the Group is structured into Retail Banking, Santander Corporate and Investment Banking, Wealth Management and Real Estate Activity Spain; the sum of these segments is equal to that of the primary geographical reportable segments and total figures for the Group are obtained by adding the data for the corporate centre. During the year 2018, certain changes took place in the organizational structure of the Group, which led to a change in the secondary level of segment reporting: o The Group acquired the remaining stake of SAM Investment Holdings Limited that was not owned by the Group, as explained in Note 3. Following this change in the consolidation perimeter, the Group has decided to integrate the acquired asset management business, the International Private Banking business and the corporate unit of Private Banking, which were previously reported within the Commercial Banking segment, into a new segment identified as Wealth Management. The Group has restated the corresponding information for earlier periods to reflect these changes in the structure of its internal organization and reporting. o Additionally, there has been an adjustment into the Global Customer Relationship Model’s perimeter between the Retail Banking segment and the Corporate and Investment Banking segment and other minor changes relating to the Real Estate Activity Spain Finally the Group has decided to rename certain of its business segments. Accordingly, the Commercial Banking unit is now called Retail Banking; and the segment previously reported as Santander Global Corporate Banking is now called Santander Corporate & Investment Banking. Considering the aforementioned information, the business segments are now conformed as follows: Retail Banking (formerly Commercial Banking): This covers all customer banking businesses, including consumer finance, except those of corporate banking, which are managed through the SCIB, and asset management and private banking, which are managed by Wealth Management. The results of the hedging positions in each country are also included, conducted within the sphere of each one’s Assets and Liabilities Committee Santander Corporate and Investment Banking (SCIB): This business reflects the revenues from global corporate banking, investment banking and markets worldwide including treasuries managed globally (always after the appropriate distribution with Retail Banking customers), as well as equities business. Wealth Management: Includes the asset management business (Santander Asset Management, S.A., S.G.I.I.C.), the corporate unit of Private Banking and International Private Banking in Miami and Switzerland. The Real Estate Activity Spain includes the loans and foreclosed assets of customers who are mainly involved in real estate development and who have a specialised management model and the assets of the former real estate fund (Santander Banif inmobiliario). Although the Real Estate Operations in Spain and the Wealth Management business segments do not meet the quantitative thresholds defined in IFRS8, such segments are considered reportable by the Group and separately disclosed because the Group management believes that information about these segments is useful to users of the financial statements. There are no customers in any of the business segments that generate income exceeding 10% of Total income. Million of euros 2018 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 32,523 2,378 420 (33) (947) 34,341 Net fee income 8,945 1,512 1,097 — (69) 11,485 Gains (losses) on financial transactions (*) 720 1,004 62 — 11 1,797 Other operating income (**) 645 193 (37) 23 (23) 801 Total income 42,833 5,087 1,542 (10) (1,028) 48,424 Administrative expenses, depreciation and amortisation (19,256) (2,105) (729) (194) (495) (22,779) Net operating income (***) 23,577 2,982 813 (204) (1,523) 25,645 Net loan-loss provisions (****) (8,461) (217) (9) (70) (116) (8,873) Other gains (losses) and provisions (*****) (1,707) (108) (7) (73) (100) (1,995) Operating profit/(loss) before tax 13,409 2,657 797 (347) (1,739) 14,777 Tax on profit (4,329) (792) (234) 104 21 (5,230) Profit from continuing operations 9,080 1,865 563 (243) (1,718) 9,547 Net profit from discontinued operations — — — — — — Consolidated profit 9,080 1,865 563 (243) (1,718) 9,547 Non-controlling interests 1,287 160 35 (2) 3 1,483 Attributable profit to the parent 7,793 1,705 528 (241) (1,721) 8,064 The condensed income statements are as follows: (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement. Additionally, includes a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks included in the line provisions or reversal of provisions, net of the statutory income statement. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations Million of euros 2017 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 32,339 2,442 404 (38) (851) 34,296 Net fee income 9,306 1,627 700 2 (38) 11,597 Gains (losses) on financial transactions (*) 681 1,212 38 — (227) 1,704 Other operating income (**) 580 222 70 29 (104) 797 Total income 42,906 5,503 1,212 (7) (1,220) 48,394 Administrative expenses, depreciation and amortisation (19,677) (2,028) (528) (208) (476) (22,917) Net operating income (***) 23,229 3,475 684 (215) (1,696) 25,477 Net loan-loss provisions (****) (8,278) (690) (9) (88) (46) (9,111) Other gains (losses) and provisions (*****) (2,395) (72) (8) (157) (181) (2,813) Operating profit/(loss) before tax 12,556 2,713 667 (460) (1,923) 13,553 Tax on profit (3,843) (750) (165) 139 31 (4,588) Profit from continuing operations 8,713 1,963 502 (321) (1,892) 8,965 Net profit from discontinued operations — — — — — — Consolidated profit 8,713 1,963 502 (321) (1,892) 8,965 Non-controlling interests 1,258 183 24 (13) (3) 1,449 Attributable profit to the parent 7,455 1,780 478 (308) (1,889) 7,516 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement. Additionally, includes a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks included in the line provisions or reversal of provisions, net of the statutory income statement. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2016 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 28,914 2,528 429 (43) (739) 31,089 Net fee income 8,206 1,407 597 1 (31) 10,180 Gains (losses) on financial transactions (*) 668 1,256 32 9 (242) 1,723 Other operating income (**) 536 289 18 72 (53) 862 Total income 38,324 5,480 1,076 39 (1,065) 43,854 Administrative expenses, depreciation and amortisation (18,036) (1,917) (473) (211) (450) (21,087) Net operating income (***) 20,288 3,563 603 (172) (1,515) 22,767 Net loan-loss provisions (****) (8,673) (658) (22) (167) 2 (9,518) Other gains (losses) and provisions (*****) (1,682) (76) (5) (122) (75) (1,960) Operating profit/(loss) before tax 9,933 2,829 576 (461) (1,588) 11,289 Tax on profit (2,734) (787) (153) 137 141 (3,396) Profit from continuing operations 7,199 2,042 423 (324) (1,447) 7,893 Net profit from discontinued operations — — — — — — Consolidated profit 7,199 2,0

Related parties

Related parties	12 Months Ended
	Dec. 31, 2018
Related parties
Related parties	53. Related parties The parties related to the Group are deemed to include, in addition to its subsidiaries, associates and joint ventures, the Bank's key management personnel (the members of its board of directors and the executive vice presidents, together with their close family members) and the entities over which the key management personnel may exercise significant influence or control. Following below is the balance sheet balances and amounts of the Group's income statement corresponding to operations with the parties related to it, distinguishing between associates and joint ventures, members of the Bank's board of directors, the Bank's executive vice presidents, and other related parties. Related-party transactions were made on terms equivalent to those that prevail in arm's-length transactions or, when this was not the case, the related compensation in kind was recognise. Million of euros 2018 2017 2016 Members Members Members Associates of the Other Associates of the Other Associates of the Other and joint board of Executive related and joint board of Executive related and joint board of Executive related ventures directors vicepresidents parties ventures directors vicepresidents parties ventures directors vicepresidents parties Assets: 7,202 — 30 256 6,048 — 21 300 5,884 — 22 307 Loans and advances: credit institutions 704 — — — 472 — — — 223 — — - Loans and advances: customers 6,142 — 30 256 5,081 — 21 279 5,209 — 22 286 Debt instruments 295 — — — 473 — — 21 452 — — 21 Others 61 — — — 22 — — — — — — — Liabilities: 1,650 19 12 363 748 19 14 63 824 27 10 124 Financial liabilities: credit institutions 8 — — — 309 — — — 155 — — — Financial liabilities: customers 1,596 19 12 363 414 19 14 63 669 27 10 124 Marketable debt securities 8 — — — 4 — — — — — — — Others 38 — — — 21 — — — — — — — Income statement: 993 — — 31 1,020 — — 14 609 — — 13 Interest income 73 — — 14 57 — — 8 67 — — 10 Interest expense (3) — — (1) (3) — — — (15) — — (1) Gains/losses on financial assets and liabilities and others 82 — — — 302 — — — 15 — — — Commission income 853 — — 18 735 — — 6 561 — — 4 Commission expense (12) — — — (71) — — — (19) — — — Other: 4,707 9 3 782 3,881 7 3 597 4,146 1 3 846 Contingent liabilities and others 21 7 1 508 6 6 1 352 19 — — 139 Contingent commitments 393 1 2 64 301 1 2 60 17 1 3 417 Derivative financial instruments 4,293 1 — 210 3,574 — — 185 4,110 — — 290 In addition to the detail provided above, there were insurance contracts linked to pensions amounting to EUR 210 million at December 31, 2018 (December 31, 2017: EUR 239 million; December 31, 2016: EUR 269 million).

Risk management

Risk management	12 Months Ended
	Dec. 31, 2018
Risk management
Risk management	54. Risk management a) Cornerstones of the risk function The risk management and control model is based on the principles below: · Advanced risk management policy, with a forward-looking approach that allows the Group to maintain a medium-low risk profile, through a risk appetite defined by the board. · Risk culture that applies to all employees throughout the Group. · Clearly defined three lines of defence model that enable us to identify, manage, control, monitor and challenge all risks. · Autonomous subsidiaries model with robust governance based on a clear structure that separates the risk management and the risk control functions. · Information and data management processes that allow all risks to be identified, assessed, managed and reported at appropriate levels. · Risks are managed by the units that generate them. These principles are aligned with the Group's strategy and business model, taking into account the requirements of regulators and supervisors, as well as the best market practices. The Board is responsible for approving the general risk control and management policy, including tax risks. 1. The main risk categories in which the Group has its most significant current and/or potential exposures, thus facilitating the identification thereof, includes the following: · Credit risk: risk of financial loss arising from the default or credit quality deterioration of a customer or other third party, to which the Santander Group has either directly provided credit or for which it has assumed a contractual obligation. · Market risk: risk incurred as a result of changes in market factors that affect the value of positions in the trading book. · Trading risk · Structural risk. · Liquidity risk: risk of the Group does not have the liquid financial assets necessary to meet its obligations at maturity, or can only obtain them at a high cost. · Capital risk: risk of Santander Group not having an adequate amount or quality of capital to meet its internal business objectives, regulatory requirements or market expectations. In addition, the Group considers the following risks: · Operational risk: is defined as the risk of loss due to the inadequacy or failure of internal processes, people and systems, or due to external events. This definition includes legal risk. · Compliance risk and conduct: is that which arises from practices, processes or behaviours that are not adequate or that do not comply with internal regulations, legality or supervisory requirements. · Reputational risk: is defined as the risk of a current or potential negative economic impact due to a reduction in the perception of the Group by employees, customers, shareholders/investors and society in general. · Model risk: is the risk of loss arising from inaccurate predictions that may lead the Group to make sub-optimal decisions, or from the inappropriate use of a model. · Strategic risk: the risk of loss or damage arising from strategic decisions or their poor implementation, which affect the long-term interests of our main stakeholders, or of an inability to adapt to the changing environment. 2. The Group has a strong governance framework, which pursues the effective control of the risk profile, within the risk appetite defined by the board. This governance framework is underpinned by the distribution of roles among the three lines of defence, a robust structure of committees and a strong relationship between the Group and its subsidiaries. 2.1 At Banco Santander, we follow a three lines of defence control model: · The first line of defence is all business functions and business support functions that originate risks and have primary responsibility in the management of those risks. The role of these functions is to establish a management structure for the risks generated as part of their activity ensuring that these remain within approved risk limits. · The second line of defence is risk Control and Compliance and Conduct function. The role of these functions is to provide independent oversight and challenge to the risk management activities of the first line of defence. · The third line of defence: Internal Audit function. This function controls and regularly checks that the policies, and procedures are adequate and effectively implemented in the management and control of all risks. The risk control, compliance and conduct, and internal audit functions are separated and have direct access to the board of directors and/or its committees. 2.2 Ultimately, the board of directors is responsible for risk management and control and, in particular, for approving and periodically reviewing the Group's risk culture and risk appetite framework. Except for specific topics detailed in its bylaws, the board has the capacity to delegate its faculties to other committees. This is the case of the risk supervision, regulation and compliance committee and the Group’s Executive committee, which has specific risk related responsibilities. The Group Chief Risk Officer (Group CRO) leads the risk function within the Group, advises and challenges the executive line and reports independently to the risk supervision, regulation and compliance committee and to the board. Other bodies that form the highest level of risk governance, with authorities delegated by the board of directors, are the executive risk committee and the risk control committee, detailed below: Risk control committee (CCR): To control and ensure that risks are managed in accordance with the risk appetite approved by the board, providing a comprehensive overview of all risks. This includes identifying and monitoring both current and potential risks, and evaluating their potential impact on the Group’s risk profile. This committee is chaired by the Group Chief Risk Officer (Group CRO). Additionally, each risk factor has its own fora, committees and meetings to manage the risks under their control. Among others, they have the following responsibilities: - - - Executive risk committee (ERC): This committee is responsible for managing all risks, within the powers delegated by the board. The committee makes decisions on risks assumed at the highest level, ensuring that they are within the established risk appetite limits for the Group. This committee is chaired by the Chief executive officer and it is composed with nominated executive directors and other Group´s senior management. The Risk, Finance and Compliance and Conduct functions, among others, are represented. The Group CRO has a veto right on the committee’s decisions. 2.3 Alignment of units with the Group In all the subsidiaries, the management and control model follows the frameworks established by the Group’s board of directors. The local units adhere to them by their respective boards. The Group reviews and validates any local adaptations as needed. Corporate centre participates in the relevant decision-making through their validation. Subsidiary committee structures The "Group-subsidiary governance model and good governance practices for subsidiaries" recommends that each subsidiary should have Risk committees and other executive committees, consistent with those already in place in the Group. The subsidiary governance bodies are structured taking into consideration local requirements, both regulatory and legal, as well as their specific dimension and complexity, in a manner that is consistent with those of the parent company, as established in the internal governance framework. 3. 3.1 The Group defines the risk appetite as the amount and type of risks that are considered prudent to assume for implementing our business strategy in the event of unexpected circumstances. Severe scenarios that could have a negative impact on the levels of capital, liquidity, profitability and/or the share price are taken into account. The risk appetite is set by the board for the whole Group. Every main business unit sets its own risk appetite according to the adaptation of the Group methodology and its own circumstances. The boards of the subsidiaries are responsible for approving their respective risk appetite proposals once they have been reviewed and validated by the Group. The Group shares a common risk appetite model. It sets out the requirements for processes, metrics, governance bodies, controls and standards for implementation across the Group, cascading down management policies and limits to lower levels. Corporate risk appetite principles The following principles govern the Santander Group’s risk appetite in all its units: · Responsibility of the board and of senior management. · Holistic risk view (Enterprise Wide Risk), risk profile backtesting and challenge. The risk appetite must consider all significant risks and facilitate an aggregate view of the risk profile through the use of quantitative metrics and qualitative indicators. · Forward-looking view. The risk appetite must consider the desirable risk profile for the short and medium term, taking into account both the most plausible circumstances and adverse/stress scenarios. · Embedding and alignment with strategic and business plans. The risk appetite is an integral part of the strategic and business planning, and is embedded in the daily management through the transfer of the aggregated limits to those set at portfolio level, unit or business line, as well as through the key risk appetite processes. · Coherence across the various units and a common risk language throughout the Group. The risk appetite of each unit of the Group must be coherent with that across the Group. · Periodic review, backtesting and adoption of best practices and regulatory requirements. Monitoring and control mechanisms are established to ensure the risk profile is maintained, and the necessary corrective and mitigating actions are taken in the event of non-compliance. Limits, monitoring and control structure The risk appetite is formulated annually and includes a series of metrics and limits to establish in quantitative and qualitative terms the maximum risk exposure that every unit and the Group as a whole is willing to assume. Compliance with risk appetite limits is regularly monitored. Specialised control functions report the risk profile adequacy to the board and its committees, on quarterly basis. Limit breaches and non-compliance with the risk appetite are reported to the relevant governance bodies. An analysis of the causes, an estimation of the duration of the breach and corrective actions proposals are also submitted. Linkage between the risk appetite limits and those of the business units and portfolios is a key element for making the risk appetite an effective risk management tool. Pillars of the risk appetite The risk appetite is expressed via limits on quantitative metrics and qualitative indicators that measure the exposure or risk profile by type of risk, portfolio and, segment and business line, under both current and stressed conditions. These metrics and risk appetite limits are articulated in five axes that define the positioning that Santander wants to adopt or maintain in the deployment of its business model, described as follows: · The volatility in the income statement that the Group is willing to accept. · The solvency position that the Group wants to maintain. · The minimum liquidity position that the Group wants to have. · The maximum levels of concentration that the Group considers reasonable to admit. · Non-financial transversal risks. 3.2. Risk identification and assessment (RIA) The Group carries out the identification and assessment of the different risks that is exposed to, involving the different lines of defence, establishing management standards that not only meet regulatory requirements but also reflect best practices in the market, and reinforce our risk culture. In 2018, the approach centred on three main areas: standards control environment review, perimeter completeness by integrating new units, together with the risk performance indicators review and their alignment with the risk appetite. In addition the RIA exercise analyses the evolution of risks and identifies areas of improvement: · Risk performance, enabling the understanding of residual risk by risk type through a set of metrics and indicators calibrated using international standards. · Control environment assessment, measuring the degree of implementation of the target operating model, as part of our advanced risk management. · Forward-looking analysis, based on stress metrics and identification and/or assessment of the main threats to the strategic plan (Top risks), enabling specific action plans to be put in place to mitigate potential impacts and monitoring these plans. Based on the periodic RIA exercise, the Group’s risk profile as of December 2018 remains as solid medium-low. 3.3. Scenario analysis We analyse the impact triggered by different scenarios in the environment, in which the Group operates. These scenarios are expressed both in terms of macroeconomic variables, as well as other variables that may impact our risk profile. Scenario analysis is a robust and useful tool for management at all levels. It enables the Group to assess its resilience in stressed environments or scenarios, and identifies measures to reduce exposure under these scenarios. The objective is to reinforce the stability of income, capital and liquidity. The robustness and consistency of the scenario analysis exercises are based on the following pillars: · Development and integration of models that estimate the future performance of metrics (for example, credit losses), based on both historic information (internal to the Group and external from the market), and simulation models. · Inclusion of expert judgement and portfolio manager’s know-how. · Challenge and backtesting of model results to ensure they are adequate. · Robust governance of the whole process, covering models, scenarios, assumptions and rationale for the results, and their impact on management. Scenario analysis forms an integral part of several key processes of the Group: · Regulatory uses: stress test scenarios using the guidelines set by the European regulator or by each local supervisor. · Internal capital adequacy assessment (ICAAP) or liquidity assessment (ILAAP) in which, while the regulators can impose certain requirements, the Group develops its own methodology to assess its capital and liquidity levels under different stress scenarios to support planning and adequately managing the Group’s capital and liquidity. · Risk appetite. Contains stressed metrics on which maximum levels of losses (minimum liquidity levels) are established that the Group does not want to exceed. These exercises are related to those for capital and liquidity, although they have different frequencies and present different granularity levels. · Recurrent risk management in different processes/exercises: o Budgetary and strategic planning process, in the development of business policies for risk approval, in the global risk analysis made by senior management and in specific analysis regarding the profile of activities or portfolios. o Identification of Top risks on the basis of, a systematic process to identify and assess all the risks which the Group is exposed to. The Top risks are selected and a macroeconomic or idiosyncratic scenario is associated with each one, to assess their impact on the Group. o Recovery plan annually to establish the available tools the Group will have, to survive in the event of an extremely severe financial crisis. The plan sets out a series of financial and macroeconomic stress scenarios, with differing degrees of severity, that include idiosyncratic and/or systemic events. o IFRS9 from January 1, 2018, the processes, models and scenario analysis methodology are included in the new regulatory provision requirements. 3.4. Our reporting model has strengthened by consolidating the overall view of all risks, based on complete, precise and recurring information that allows the Group’s senior management to assess the risk profile and decide accordingly. The risk reporting taxonomy, contains three types of reports received by senior management on a monthly basis: the Group risk report, the risk reports of each unit, and the reports of each of the risk factors identified in the Group’s risk map. b) Credit risk 1. Introduction to the credit risk treatment Credit risk is the risk of financial loss arising from the default or credit quality deterioration of a customer or other third party, to which the Group has either directly provided credit or for which it has assumed a contractual obligation. There are different limit models depending on the segment: · Large corporate groups: we use a pre-classification model based on a system for measuring and monitoring economic capital. The result is the level of risk that the Group is willing to assume with a customer/group, in terms of Capital at Risk, nominal CAP, and maximum periods according to the type of transaction (in the case of financial entities, limits are managed through Credit Equivalent Risk (CER). It includes the actual and expected risk with a customer based on its usual operations, always within the limits defined in the risk appetite and established credit policies. · Corporates and institutions that meet certain requirements (deep knowledge, rating, etc.): we use a more simplified pre-classification model through an internal limit that establishes a reference of the level of risk to be assumed with the customer. The criteria will include, among others, repayment capacity, debt in the system and the banking pool distribution. In both cases, transactions over certain thresholds or with specific characteristics might require the approval of an analyst or committee. · For individual customers and SMEs with low turnover, large volumes of credit transactions can be managed more easily with the use of automatic decision models for classifying the customer/ transaction binomial. In specific situations where a series of requirements are met, pre-approved transactions are granted to customers or potential customers (campaigns). 2. Main aggregates and variations Following are the main aggregates relating to credit risk arising on customer business: Main credit risk aggregates arising on customer business (Management information data) Credit risk with customers (*) (million of euros) Non-performing loans NPL ratio (%) 2018 2017 2016 2018 2017 2016 2018 2017 2016 Continental Europe 429,454 424,248 331,706 22,537 24,674 19,638 5.25 5.82 5.92 Spain 239,479 251,433 172,974 14,833 15,880 9,361 6.19 6.32 5.41 Santander Consumer Finance 97,922 92,589 88,061 2,244 2,319 2,357 2.29 2.50 2.68 Portugal 38,340 39,394 30,540 2,279 2,959 2,691 5.94 7.51 8.81 Poland 30,783 24,391 21,902 1,317 1,114 1,187 4.28 4.57 5.42 UK 262,196 247,625 255,049 2,755 3,295 3,585 1.05 1.33 1.41 Latin América 171,898 167,516 173,150 7,461 7,464 8,333 4.34 4.46 4.81 Brazil 84,212 83,076 89,572 4,418 4,391 5,286 5.25 5.29 5.90 Mexico 33,764 28,939 29,682 822 779 819 2.43 2.69 2.76 Chile 41,268 40,406 40,864 1,925 2,004 2,064 4.66 4.96 5.05 Argentina 5,631 8,085 7,318 179 202 109 3.17 2.50 1.49 US 92,152 77,190 91,709 2,688 2,156 2,088 2.92 2.79 2.28 Santander Bank, National Association 51,049 44,237 54,040 450 536 717 0.88 1.21 1.33 Santander Consumer USA 26,424 24,079 28,590 2,043 1,410 1,097 7.73 5.86 3.84 Group Total 958,153 920,968 855,510 35,692 37,596 33,643 3.73 4.08 3.93 (*) Includes gross lending to customers, guarantees and documentary credits. Risk is diversified among the main regions where the Group operates: Continental Europe (45%), United Kingdom (27%), Latin America (18%) and the United States (10%), with an adequate balance between mature and emerging markets. The evolution up to December 2018, credit risk with customers increased by 4% vs. 2017, considering the same perimeter, mainly due to the United States, United Kingdom, and Mexico. Growth in local currency was generalised across all units with the exception of Spain and Portugal. These levels of lending, together with lower non-performing loans (NPLs) of EUR 35,692 million (-5.1% vs. 2017) reduced the Group’s NPL ratio to 3.73% (-35 bp against 2017). In order to cover potential losses arising from these NPLs, in accordance with the new provision calculation in accordance with IFRS9, the Group recorded allowances for loan loss of EUR 8,873 million (-2.6% vs. December 2017), after deducting post write-off recoveries. This decrease is materialised in a reduction of the cost of credit to 1.00% (7 bp less than the previous year). Information on the estimation of impairment losses The Group estimates the impairment losses by calculating the expected loss at 12 months or for the entire life of the transaction, based on the stage in which each financial asset is classified in accordance with IFRS9. Then, considering the most relevant units of the group (United Kingdom, Spain, United States, Brazil, as well as Chile, Mexico, Portugal, Poland, Argentina and the Group Santander Consumer Finance) representing about 95% of the total of the Group's provisions, the detail of the exhibition and the impairment losses associated with each of the stages as of December 31, 2018 is shown. In addition, depending on the current credit quality of the transactions, the exposure is divided into three grades (investment, speculation and default): Exposure and impairment losses by stage (Million of euros) Credit Quality (*) Stage 1 Stage 2 Stage 3 Total Investment grade 685,507 7,176 — 692,683 Speculation grade 222,495 47,439 — 269,935 Default — — 30,795 30,795 Total Risk (**) 908,002 54,616 30,795 993,412 Impairment losses 3,823 4,644 12,504 20,970 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted. The other units up to the total Group amounts contributed EUR 151,906, 700 and 1,743 million of exposure, and impairment losses of EUR 152, 163 and 1,145 million, in stage 1, stage 2 and stage 3, respectively. The rest of the balance, considering the financial instruments not included before, amounts to EUR 242,867 million, mostly classified in stage 1. In addition, at December 31, 2018, the Group had EUR 757 million (January 1, 2018: EUR 803 million) of purchased credit-impaired assets, which relate mainly to the business combinations carried out by the Group. The Group monitors the evolution of credit risk provisions, in collaboration with the main geographies, by carrying out sensitivity analyses considering variations in the scenarios macroeconomic variables and their main variables (such as interest rate, house price growth, unemployment rate or GDP growth) that have an impact on the distribution of financial assets in the different stages and the calculation of credit risk provisions. Additionally, based on similar macroeconomic scenarios, the Group also performs stress tests and sensitivity analysis in a current basis, such as ICAAP, strategic plans, budgets and recovery and resolution plans. In this sense, a prospective view of the sensitivity of each of the Group’s loan portfolio is created in relation to the possible deviation from base scenario, considering both the macroeconomic developments in different scenarios and the three year evolution of the business. These tests include potentially adverse and favourable scenarios. The classification of transactions into the different stages of IFRS9 is carried out in accordance with the provisions of the risk management policies of the different Group´s units, which are consistent with the risk management policies prepared by Santander Group. In order to determine the classification in stage 2, the Group assesses whether there has been a significant increase in credit risk (SICR) since the initial recognition of transactions, considering a series of common principles throughout the Group that guarantee that all financial instruments are subject to this assessment, which considers the particularities of each portfolio and type of product on the basis of various quantitative and qualitative indicators. Furthermore, transactions are subject to the expert judgment of analysts, which is implemented in accordance with approved governance. 3.Detail of the main geographical areas Following is the risk information related to the most relevant geographies in exposure and credit risk allowances. In addition, for the Santander Corporate & Investment Banking perimeter, transactions and balances are included in each geography. 3.1. United Kingdom Credit risk with customers in the UK amounted to EUR 262,196 million as of December 2018, which means an increase of 6% compared to year end 2017 (and 7% in local currency), and representing 27% of the Group's total loan portfolio. Mortgage portfolio This portfolio at the end of December amounted to EUR 176,581 million . It consists of residential mortgages granted to new and existing customers, and all are first mortgages. There are no transactions that entail second or successive liens on mortgaged properties. All properties are valued independently before each new transaction is approved, in accordance with the Group’s risk management principles. The value of the property used as collateral for mortgages that have already been granted is updated quarterly by an independent agency, using an automatic valuation system in accordance with market practices and applicable legislation. Information on the estimation of impairment losses Following is the detail of the Santander UK exposure and impairment losses associated with each of the stages at December 31, 2018. In addition, depending on the current credit quality of the operations, the exposure is divided into three grades (investment, speculation and default): Exposure and impairment losses by stage (Million of euros) Credit Quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 225,929 1,900 — 227,829 Speculation grade 34,655 11,514 — 46,169 Default — — 2,795 2,795 Total Exposure (**) 260,584 13,415 2,795 276,793 Impairment losses 224 335 335 894 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted. For the estimation of expected losses, prospective information is taken into account. Specifically, Santander UK considers five prospective macroeconomic scenarios, which are updated periodically over a 5-year time horizon. The evolution projected for the next five years of the main macroeconomic indicators used by Santander UK to estimate expected losses is presented below: Pessimistic Pessimistic Base Optimistic Optimistic Magnitudes scenario 2 scenario 1 scenario scenario 1 scenario 2 Interest rate 2.30 % 2.50 % 1.50 % 1.30 % 1.00 % Unemployment rate 8.60 % 6.90 % 4.30 % 3.80 % 2.80 % Housing price change (9.50) % (2.00) % 2.00 % 2.30 % 3.40 % GDP growth 0.30 % 0.70 % 1.60 % 2.10 % 2.50 % Each of the macroeconomic scenarios is associated with a given probability of occurrence. In terms of allocation, Santander UK associates the highest weighting with the Base Scenario, while it associates the lowest weightings with the most extreme or acid scenarios. In addition, at December 31, 2018, the weights used by Santander UK reflect the future prospects of the British economy in relation to its current political and economic position so that higher weights are assigned for negative scenarios: Pessimistic scenario 2 10 % Pessimistic scenario 1 30 % Base scenario 40 % Optimistic scenario 1 15 % Optimistic scenario 2 5 % In relation to the determination of classification in Stage 2, the quantitative criteria applied by Santander UK is based on identifying whether any increase in PD for the expected life of the transaction is greater than both an absolute and a relative threshold. The relative threshold established is common to all portfolios and a transaction is considered to exceed this threshold when the PD for the entire life of the transaction doubles with respect to the PD at the time of initial recognition. The absolute threshold, on the other hand, is different for each portfolio depending on the characteristics of the transactions. In addition, for each portfolio, a series of specific qualitative criteria is defined to indicate that the exposure has had a significant increase in credit risk, regardless of the evolution of its PD since the time of initial recognition. Santander UK, among other criteria, considers that an operation presents a significant increase in risk when it presents irregular positions for more than 30 days. These criteria depend on the risk management practices of each portfolio. 3.2. Spain Portfolio overview Total credit risk (including guarantees and documentary credits) at Santander Spain (excluding the real estate unit, which is discussed subsequently in more detail) amounted to EUR 239,479 million (25% of the Group’s total), with an adequate level of diversification by both product and customer segment. The NPL ratio for the total portfolio was 6.19%, 13 bp less than in 2017. The decrease in lending (which increased the NPL ratio by 13 bp) was offset by the improved NPL figure (which reduced the ratio by 22 bp). This improvement was mainly due to an improved performance of the credit portfolio, the cure of several restructured loans and the sale of loan portfolios. The coverage rate stood at 45%. Information on the estimation of impairment losses Following is the detail of the Santander Spain exposure and impairment losses associated with each of the stages at December 31, 2018. In addition, depending on the current credit quality of the operations, the exposure is divided into three grades (Investment, speculation and default): Exposure and impairment losses per stage (Million of euros) Credit Quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 289 — Speculation grade 25,108 12,603 — 37,711 Default — — 14,941 14,941 Total Exposure (**) 12,892 14,941 Impairment losses 366 768 5,565 6,699 (*) Detail of credit quality calculated for the purposes of Grupo Santander’s management (**) Amortised cost assets + Loans and advances + loan commitments granted. The remaining legal entities to reach the entire portfolio in Spain contribute another EUR 125,544, EUR 66 and EUR 1,657 million of exposure, and impairment losses in the amount of EUR 132, EUR 48 and EUR 957 million, in stage 1, stage 2 and stage 3, respectively. For the estimation of the expected losses, the prospective information is taken into account. Specifically, Santander Spain considers three prospective macroeconomic scenarios, which are updated periodically, during a time horizon of 5 years. The projected evolution for the next five years of the main macroeconomic indicators used by Santander Spain for estimating expected losses is presented below: 2019-2023 Pessimistic Base Optimistic Magnitudes scenario scenario scenario Interest rate 0.30 % 0.70 % 1.20 % Unemployment rate 15.30 % 12.30 % 10.80 % Housing price change 0.50 % 2.20 % 3.80 % GDP growth 1.10 % 1.80 % 2.60 % Each one of the macroeconomic scenarios is associated with a given probability of occurrence. As for its allocation, Santander Spain associates the Base scenario with the highest weight, while associating the lower weights to the most extreme scenarios: Pessimistic scenario 30 % Base scenario 40 % Optimistic scenario 30 % In relation to the determination of the classification in stage 2, the quantitative criteria applied by Santander Spain are based on identifying whether any increase in PD for the entire expected life of the operation is greater than an absolute threshold. The threshold established for each portfolio is different depending on the characteristics of the transactions, and a transaction is considered to exceed this threshold when the PD for the entire life of the transaction increases by up to a quarter with respect to the PD it had at the time of initial recognition. In addition, for each portfolio, a series of specific qualitative criteria are defined that indicate that the exposure has had a significant increase in credit risk, regardless of the evolution of its PD since the time of initial recognition. Santander Spain, among other criteria, considers that an operation presents a significant increase in risk when it presents positions past due for more than 30 days. These criteria depend on the risk management practices of each portfolio. Portfolio of home purchase loans to families Residential mortgages in Spain, including Santander Consumer Finance business, amounted to EUR 63,290 million, representing 25% of total credit risk. 99.14% o

Additional disclosures

Additional disclosures	12 Months Ended
	Dec. 31, 2018
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Additional Disclosures	55. Additional Disclosures This Note includes relevant information about additional disclosure requirements. 55.1 Parent company financial statements Following are the summarized balance sheets of Banco Santander, S.A. as of December 31, 2018, 2017 and 2016 CONDENSED BALANCE SHEETS (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) Assets Cash and due from banks 105,660 76,690 49,979 Of which: To bank subsidiaries 16,339 20,818 11,442 Trading account assets 70,825 64,326 70,437 Investment securities 61,064 49,194 45,702 Of which: To bank subsidiaries 11,084 6,474 8,326 To non-bank subsidiaries 4,581 3,729 3,662 Net Loans and leases 263,142 197,591 195,532 Of which: To non-bank subsidiaries 26,505 33,113 35,085 Investment in affiliated companies 81,734 85,428 80,614 Of which: To bank subsidiaries 69,118 65,567 63,210 To non-bank subsidiaries 12,616 19,861 17,404 Premises and equipment, net 2,410 1,929 1,834 Other assets 23,541 17,257 17,146 Total assets 608,376 492,415 461,244 Liabilities Deposits 350,786 256,389 265,565 Of which: To bank subsidiaries 18,526 20,391 19,179 To non-bank subsidiaries 13,655 13,115 40,082 Short-term debt 30,883 40,540 19,110 Long-term debt 75,600 53,023 34,499 Total debt 106,483 93,563 53,609 Of which: To bank subsidiaries 2,874 1,138 — To non-bank subsidiaries 998 2,966 14,062 Other liabilities 82,340 71,896 78,835 Total liabilities 539,609 421,848 398,009 Stockholders' equity Capital stock 8,118 8,068 7,291 Retained earnings and other reserves 60,649 62,499 55,944 Total stockholders' equity 68,767 70,567 63,235 Total liabilities and Stockholders’ Equity 608,376 492,415 461,244 In the financial statements of the Parent Company, investments in subsidiaries, jointly controlled entities and associates are recorded at cost. Following are the condensed statements of income of Banco Santander, S.A. for the years ended December 31, 2018, 2017 and 2016. Year ended CONDENSED STATEMENTS OF INCOME (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) Interest income Interest from earning assets 7,660 5,733 6,023 Dividends from affiliated companies 3,872 3,320 3,459 Of which: From bank subsidiaries 2,874 2,580 2,686 From non-bank subsidiaries 998 740 773 11,532 9,053 9,482 Interest expense (3,861) (3,204) (3,113) Interest income / (Charges) 7,671 5,849 6,369 Provision for credit losses (686) (451) (528) Interest income / (Charges) after provision for credit losses 6,985 5,398 5,841 Non-interest income: 3,972 3,872 3,403 Non-interest expense: (7,573) (6,293) (7,115) Income before income taxes 3,384 2,977 2,129 Income tax expense (83) 29 352 Net income 3,301 3,006 2,481 Following are the condensed statement of comprehensive income of Banco Santander, S.A. for the years ended December 31, 2018, 2017 and 2016: CONDENSED STATEMENTS OF Year ended COMPREHENSIVE INCOME (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) NET INCOME 3,301 3,006 2,481 OTHER COMPREHENSIVE INCOME (410) (356) 364 Items that may be reclassified subsequently to profit or loss (348) (341) 439 Available-for-sale financial assets: (634) (625) 619 Revaluation gains/(losses) (135) (283) 830 Amounts transferred to income statement (499) (342) (211) Other reclassifications — — — Cash flow hedges: 137 (7) 4 Revaluation gains/(losses) 153 (7) 4 Amounts transferred to income statement (16) — — Amounts transferred to initial carrying amount of hedged items — — — Other reclassifications — — — Hedges of net investments in foreign operations: — — — Revaluation gains/(losses) — — — Amounts transferred to income statement — — — Other reclassifications — — — Exchange differences: — — — Non-current assets held for sale: — — — Income tax 149 291 (184) Items that will not be reclassified to profit or loss: (62) (15) (75) Actuarial gains/(losses) on pension plans 43 (23) (106) Rest of valuation adjustments (78) — — Income tax (27) 8 31 TOTAL COMPREHENSIVE INCOME 2,891 2,650 2,845 Following are the condensed cash flow statements of Banco Santander, S.A. for the years ended December 31, 2018, 2017 and 2016. CONDENSED CASH FLOW STATEMENTS Year ended (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 3,301 3,006 2,481 Adjustments to profit 11,576 1,824 1,245 Net increase/decrease in operating assets (17,566) (10,430) 36,393 Net increase/decrease in operating liabilities 13,411 21,915 (36,632) Reimbursements/payments of income tax (279) (839) 151 Total net cash flows from operating activities (1) 10,443 15,476 3,638 2. Cash flows from investing activities Investments (-) (1,472) (8,818) (4,419) Divestments (+) 10,197 4,995 7,249 Total net cash flows from investment activities (2) 8,725 (3,823) 2,830 3. Cash flows from financing activities Issuance of own equity instruments — 7,072 — Disposal of own equity instruments 805 1,004 957 Acquisition of own equity instruments (816) (972) (943) Issuance of debt securities 2,750 2,894 2,346 Redemption of debt securities (827) (764) (5,333) Dividends paid (3,118) (2,665) (2,308) Issuance/Redemption of equity instruments — — — Other collections/payments related to financing activities (2) 532 — Total net cash flows from financing activities (3) (1,208) 7,101 (5,281) 4. Effect of exchange rate changes on cash and cash equivalents (4) 237 (655) 289 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) 18,197 18,099 1,476 Cash and cash equivalents at beginning of period 33,734 15,635 14,159 Cash and cash equivalents at end of period 51,931 33,734 15,635 55.2 Preference Shares and Preferred Securities The following table shows the balance of the preference shares and preferred securities as of December 31, 2018, 2017 and 2016: 2018 2017 2016 (Millions of Euros) Preference shares 345 404 413 Preferred securities 9,717 8,369 6,916 Total at period-end 10,063 8,773 7,329 Both Preference Shares and Preferred Securities are recorded under the “Financial liabilities at amortized cost – Subordinated Liabilities” caption in the consolidated balance sheet as of December 31, 2018, 2017 and 2016. Preference Shares include the financial instruments issued by the consolidated companies which, although equity for legal purposes, do not meet the requirements for classification as equity in the financial statements. These shares do not carry any voting rights and are non-cumulative. Preference shares include non-cumulative preferred non-voting shares issued by Santander UK plc and Santander Bank, National Association. Preferred securities include non-cumulative preferred non-voting securities issued by Banco Santander, S.A., Santander UK Group, Banco Santander, (Brasil), S.A., and Banco Popular. For the purposes of payment priority, preferred securities are junior to all general creditors and to subordinated deposits. The payment of dividends on these securities, which have no voting rights, is conditional upon the obtainment of sufficient distributable profit and upon the limits imposed by Spanish banking regulations on equity. Preference shares and preferred securities are perpetual securities and there is no obligation that requires the Group to redeem them. All securities have been fully subscribed by third parties outside the Group. In the consolidated balance sheets, these securities are shown net of any temporary transactions relating to liquidity guarantees. For further information, see note 23.c. Outstanding at December 31, 2018 Amount in Preference Shares currency Redemption Issuer/Date of issue Currency (million) Interest rate Option (A) Santander UK plc, October 1995 Pounds Sterling 80.3 10.375% No option Santander UK plc, February 1996 Pounds Sterling 80.3 10.375% No option Santander UK plc, May 2006 Pounds Sterling 13.8 6.22% (B) May 24, 2019 Santander Bank, National Association, August 2000 US Dollar 153.0 12.00% May 16, 2020 Outstanding at December 31, 2018 Amount in Preferred Securities currency Issuer/Date of issue Currency (million) Interest rate Maturity date Banco Santander, S.A. Banco Español de Crédito, October 2004 Euro 36.5 €CMS 10 + 0.125% Perpetuity Banco Español de Crédito, November 2004 (A) Euro 106.5 5.50% Perpetuity Banco Santander, S.A., March 2014 Euro 1,500.0 6.25% (C) Perpetuity Banco Santander, S.A., May 2014 US Dollar 1,500.0 6.375% (D) Perpetuity Banco Santander, S.A., September 2014 Euro 1,500.0 6.25% (E) Perpetuity Banco Santander, S.A., April 2017 Euro 750.0 6.75% (F) Perpetuity Banco Santander, S.A., September 2017 Euro 1,000.0 5.25% (G) Perpetuity Banco Santander, S.A., March 2018 Euro 1,500.0 4.75% (H) Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 US Dollar 18.2 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 US Dollar 25.0 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 Euro 306.9 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 Euro 153.4 2.0% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), September 2004 Euro 144.0 €CMS 10 +0.05% subject to a maximum distribution of 8% per annum Perpetuity Santander Finance Preferred, S.A. (Unipersonal), October 2004 Euro 155.0 5.75% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), March 2007 (J) US Dollar 210.4 US3M + 0.52% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), July 2007 Pounds Sterling 4.9 7.01% Perpetuity Santander International Preferred S.A. (Sociedad Unipersonal), March 2009 US Dollar 979.7 2.0% Perpetuity Santander International Preferred S.A. (Sociedad Unipersonal), March 2009 Euro 8.6 2.0% Perpetuity Santander UK Group Abbey National Plc, August 2002 Pounds Sterling 1.8 Libor GBP (6M) +1.86% (I) Perpetuity Banco Santander (Brasil), S.A. January 2014 US Dollar 129.6 7.38% October 29, 2049 Banco Popular Pastor FRN, June 2004 Euro 11.7 2.07% Perpetuity A. From these dates the issuer can redeem the shares, subject to prior authorization by the national supervisor. B. Fixed/Floating Rate Non-Cumulative Callable Preference Shares. Dividends will accrue on a principal amount equal to £1,000 per Preference Share at a rate of 6.222 per cent per annum in respect of the period from (and including) May 24, 2006 (the Issue Date) to (but excluding) May 24, 2019 (the First Call Date) and thereafter at a rate reset quarterly equal to 1.13 per cent per annum above the London interbank offered rate for three-month sterling deposits. From (and including) the Issue Date to (but excluding) the First Call Date, dividends, if declared, will be paid annually in arrears on May 24, in each year. Subject as provided herein, the first such dividend payment date will be May 24, 2007 and the last such dividend payment date will be the First Call Date. From (and including) the First Call Date, dividends, if declared, will be paid quarterly in arrears on May 24, August 24, November 24 and February 24, in each year. Subject as provided herein, the first such dividend payment date will be August 24, 2019. C. Payment is subject to certain conditions and to the discretion of the Bank. The 6.25% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 541 basis points on the five-year Mid-Swap Rate. D. Payment is subject to certain conditions and to the discretion of the Bank. The 6.375% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 478.8 basis points on the five-year Mid-Swap Rate. E. Payment is subject to certain conditions and to the discretion of the Bank. The 6.25% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 564 basis points on the five-year Mid-Swap Rate. F. Payment is subject to certain conditions and to the discretion of the Bank. The 6.75% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 680.3 basis points on the five-year Mid-Swap Rate. G. Payment is subject to certain conditions and to the discretion of the Bank. The 5.25% interest rate is set for the first six years. After that, it will be reviewed by applying a margin of 499.9 basis points on the five-year Mid-Swap Rate. H. Payment is subject to certain conditions and to the discretion of the Bank. The 4.75% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 409.7 basis points on the five-year Mid-Swap Rate. I. 6.984% fixed until February 9, 2018, and thereafter, at a rate reset semi-annually of 1.86% per annum + Libor GBP (6M). J. Listed in the U.S. Santander Finance Preferred, S.A. (Unipersonal), Santander Finance Capital, S.A. (Unipersonal), Santander International Preferred, S.A. (Unipersonal), Santander Issuances, S.A., and Santander US Debt, S.A. (Sociedad Unipersonal) - issuers of registered securities guaranteed by Banco Santander, S.A. until November 2017, merged in that date with Banco Santander, S.A.

Accounting policies (Policies)

Accounting policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting policies
Foreign currency transactions	a) Foreign currency transactions i. The Bank’s functional and presentation currency is the euro. Also, the presentation currency of the Group is the euro. ii. Foreign currency balances are translated to euros in two consecutive stages: - Translation of foreign currency to the functional currency (currency of the main economic environment in which the entity operates); and - Translation to euros of the balances held in the functional currencies of entities whose functional currency is not the euro. Translation of foreign currency to the functional currency Foreign currency transactions performed by consolidated entities (or entities accounted for using the equity method) not located in European Monetary Union (“EMU”) countries are initially recognised in their respective currencies. Monetary items in foreign currency are subsequently translated to their functional currencies using the closing rate. Furthermore: - Non-monetary items measured at historical cost are translated to the functional currency at the exchange rate at the date of acquisition. - Non-monetary items measured at fair value are translated at the exchange rate at the date when the fair value was determined. - Income and expenses are translated at the average exchange rates for the year for all the transactions performed during the year. When applying this criterion, the Group considers whether there have been significant changes in the exchange rates in the year which, in view of their materiality with respect to the consolidated financial statements taken as a whole, would make it necessary to use the exchange rates at the transaction date rather than the aforementioned average exchange rates. - The balances arising from non-hedging forward foreign currency/foreign currency and foreign currency/euro purchase and sale transactions are translated at the closing rates prevailing in the forward foreign currency market for the related maturity. Translation of functional currencies to euros The balances in the financial statements of consolidated entities (or entities accounted for using the equity method) whose functional currency is not the euro are translated to euros as follows: - Assets and liabilities, at the closing rates. - Income and expenses, at the average exchange rates for the year. - Equity items, at the historical exchange rates. iii. The exchange differences arising on the translation of foreign currency balances to the functional currency are generally recognised at their net amount under Exchange differences in the consolidated income statement, except for exchange differences arising on financial instruments at fair value through profit or loss, which are recognised in the consolidated income statement without distinguishing them from other changes in fair value, and for exchange differences arising on non-monetary items measured at fair value through equity, which are recognised under Other comprehensive income–Items that may be reclassified to profit or loss–Exchange differences (See note 29). The exchange differences arising on the translation to euros of the financial statements denominated in functional currencies other than the euro are recognised in Other comprehensive income–Items that may be reclassified to profit or loss–Exchange differences in the consolidated balance sheet, whereas those arising on the translation to euros of the financial statements of entities accounted for using the equity method are recognised in equity under Other comprehensive income–Items that may be reclassified to profit or loss and Items not reclassified to profit or loss–Other recognised income and expense of investments in subsidiaries, joint ventures and associates (See note 29), until the related item is derecognised, at which time they are recognised in profit or loss. Exchange differences arising on actuarial gains or losses when converting to euros the financial statements denominated in the functional currencies of entities whose functional currency is different from the euro are recognised under equity–Other comprehensive income–Items not reclassified to profit or loss–Actuarial gains or (-) losses on defined benefit pension plans (See note 29). iv. Exchange differences arising on the translation to the Group´s presentation currency of financial statements denominated in functional currencies other than euro of countries with high inflation rates are recorded in the consolidated statement of changes in total equity - Other reserves. At December 31, 2017 and 2016 none of the functional currencies of the consolidated entities and associates located abroad related to hyperinflationary economies as defined by International Financial Reporting Standards as adopted by the European Union. Accordingly, at the end of these reporting periods it was not necessary to adjust the financial statements of any of the consolidated entities or associates to correct for the effect of inflation. At December 31, 2018 the economic situation in Argentina which led to the review by the Group of the macroeconomic indicators that affect Argentina’s economy and from this review the Group has concluded the need to apply to these annual financial statements the accounting standard IAS29 for hyperinflationary economies to its activity in Argentina (See note 1.h). v. The Group hedges a portion of its long-term foreign currency positions using foreign exchange derivative financial instruments (see Note 36). Also, the Group manages foreign currency risk dynamically by hedging its short-term position (with a potential impact on profit or loss) in order to limit the impact of currency depreciations while optimising the cost of financing the hedges. The following tables show the sensitivity of the consolidated income statement and consolidated equity to changes in exchange positions arising from investments in Group companies with currencies other than the euro and their results, due to percentage changes of 1% in the various foreign currencies in which the Group maintains significant balances. The estimated effect on the consolidated equity attributable to the Group and on consolidated profit of a 1% appreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar (162.3) (157.9) (187.1) (4.1) (1.4) (4.5) Chilean peso (22.9) (29.0) (27.9) (5.1) (1.8) (4.2) Pound sterling (171.2) (176.6) (184.9) (4.5) (3.1) (10.0) Mexican peso (18.3) (16.0) (16.2) (1.7) (1.2) (5.4) Brazilian real (85.6) (93.1) (122.3) (5.6) (6.5) (6.3) Polish zloty (36.2) (34.5) (31.5) (4.2) (1.5) (3.3) Argentine peso (7.8) (7.4) (9.0) (0.6) (3.5) (3.3) Similarly, the estimated effect on the Group’s consolidated equity and on consolidated profit of a 1% depreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar 165.6 161.1 190.8 4.2 1.5 4.5 Chilean peso 23.4 29.6 28.4 5.2 1.8 4.3 Pound sterling 174.7 180.2 188.7 4.6 3.2 10.2 Mexican peso 18.6 16.3 16.5 1.8 1.2 5.5 Brazilian real 87.4 95.0 124.7 5.7 6.6 6.5 Polish zloty 36.9 35.2 32.1 4.2 1.5 3.3 Argentine peso 8.0 7.6 9.2 0.6 3.6 3.3 The foregoing data were obtained as follows: a. Effect on consolidated equity: in accordance with the accounting policy detailed in Note 2.a.iii, the exchange differences arising on the translation to euros of the financial statements in the functional currencies of the Group entities whose functional currency is not the euro are recognised in consolidated equity. The possible effect that a change in the exchange rates of the related currency would have on the Group’s consolidated equity was therefore determined by applying the aforementioned change to the net value of each unit’s assets and liabilities -including, where appropriate, the related goodwill- and by taking into consideration the offsetting effect of the hedges of net investments in foreign operations. b. Effect on consolidated profit: the effect was determined by applying the fluctuations in the average exchange rates used for the year, as indicated in Note 2.a.ii, to translate to euros the income and expenses of the consolidated entities whose functional currency is not the euro, taking into consideration, where appropriate, the offsetting effect of the various hedging transactions in place. The estimates used to obtain the foregoing data were performed considering the effects of the exchange rate fluctuations in isolation from the effect of the performance of other variables whose changes would affect equity and profit or loss, such as variations in the interest rates of the reference currencies or other market factors. Accordingly, all variables other than the exchange rate fluctuations were kept constant with respect to their positions at December 31, 2018, 2017 and 2016.
Basis of consolidation	b) i. Subsidiaries are defined as entities over which the Bank has the capacity to exercise control. The Bank controls an entity when it is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. The financial statements of the subsidiaries are fully consolidated with those of the Bank. Accordingly, all balances and effects of the transactions between consolidated companies are eliminated on consolidation. On acquisition of control of a subsidiary, its assets, liabilities and contingent liabilities are recognised at their acquisition-date fair values. Any positive differences between the acquisition cost and the fair values of the identifiable net assets acquired are recognised as goodwill (See Note 17). Negative differences are recognised in profit or loss on the date of acquisition. Additionally, the share of third parties of the Group’s equity is presented under Non-controlling interests in the consolidated balance sheet (See Note 28). Their share of the profit for the year is presented under Profit attributable to non-controlling interests in the consolidated income statement. The results of subsidiaries acquired during the year are included in the consolidated income statement from the date of acquisition to year-end. Similarly, the results of subsidiaries for which control is lost during the year are included in the consolidated income statement from the beginning of the year to the date of disposal. At December 31, 2018 the Group controlled the following company in which it held an ownership interest of less than 50% of the share capital, Luri 1, S.A. apart from the structured consolidated entities. The percentage ownership interest in the aforementioned company is 36% (See Appendix I). Although the Group holds less than half the voting power, it manages and, as a result, exercises control over this entity. The company´s corporate purpose for the entity is the acquisition of real estate and other general operations relating thereto, including rental, and the purchase and sale of properties; the company object of the latter entity is the provision of payment services. The impact of the consolidation of this company on the Group's consolidated financial statements is immaterial. The Appendices contain significant information on the subsidiaries. ii. Joint ventures are deemed to be entities that are not subsidiaries but which are jointly controlled by two or more unrelated entities. This is evidenced by contractual arrangements whereby two or more parties have interests in entities so that decisions about the relevant activities require the unanimous consent of all the parties sharing control. In the consolidated financial statements, investments in joint ventures are accounted for using the equity method, i.e. at the Group’s share of net assets of the investee, after taking into account the dividends received therefrom and other equity eliminations. The profits and losses resulting from transactions with a joint venture are eliminated to the extent of the Group’s interest therein. The Appendices contain significant information on the joint ventures. iii. Associates are entities over which the Bank is in a position to exercise significant influence, but not control or joint control. It is presumed that the Bank exercises significant influence if it holds 20% or more of the voting power of the investee. In the consolidated financial statements, investments in associates are accounted for using the equity method, i.e. at the Group’s share of net assets of the investee, after taking into account the dividends received therefrom and other equity eliminations. The profits and losses resulting from transactions with an associate are eliminated to the extent of the Group’s interest in the associate. There are certain investments in entities which, although the Group owns 20% or more of their voting power, are not considered to be associates because the Group is not in a position to exercise significant influence over them. These investments are not significant for the Group. There are also certain investments in associates where the Group owns less than 20% of the voting rights, as it is determined that it has the capacity to exercise significant influence over them. The impact of these companies is immaterial in the Group's consolidated financial statements. The Appendices contain significant information on the associates. iv. When the Group incorporates entities, or holds ownership interests therein, to enable its customers to access certain investments, or for the transfer of risks or other purposes (also called structured entities since the voting or similar power is not a key factor in deciding who controls the entity), the Group determines, using internal criteria and procedures and taking into consideration the applicable legislation, whether control (as defined above) exists and, therefore, whether these entities should be consolidated. Specifically, for those entities to which this policy applies (mainly investment funds and pension funds), the Group analyses the following factors: - Percentage of ownership held by the Group; 20% is established as the general threshold. - Identification of the fund manager, and verification as to whether it is a company controlled by the Group since this could affect the Group’s ability to direct the relevant activities. - Existence of agreements between investors that might require decisions to be taken jointly by the investors, rather than by the fund manager. - Existence of currently exercisable removal rights (possibility of removing the manager from his position), since the existence of such rights might limit the manager’s power over the fund, and it may be concluded that the manager is acting as an agent of the investors. - Analysis of the fund manager’s remuneration regime, taking into consideration that a remuneration regime that is proportionate to the service rendered does not, generally, create exposure of such importance as to indicate that the manager is acting as the principal. Conversely, if the remuneration regime is not proportionate to the service rendered, this might give rise to an exposure that would lead the Group to a different conclusion. These structured entities also include the securitisation special purpose vehicles (“SPV”), which are consolidated in the case of the SPVs over which, being exposed to variable yield, it is considered that the Group continues to exercise control. The exposure associated with unconsolidated structured entities are not material with respect to the Group’s consolidated financial statements. v. A business combination is the bringing together of two or more separate entities or economic units into one single entity or group of entities. Business combinations whereby the Group obtains control over an entity or a business are recognised for accounting purposes as follows: - The Group measures the cost of the business combination, which is normally the consideration transferred, defined as the acquisition-date fair values of the assets transferred, the liabilities incurred to the former owners of the acquiree and the equity instruments issued, if any, by the acquirer. In cases where the amount of the consideration to be transferred has not been definitively established at the acquisition date, but rather depends on future events, any contingent consideration is recognised as part of the consideration transferred and measured at its acquisition-date fair value. Moreover, acquisition-related costs do not for these purposes form part of the cost of the business combination. - The fair values of the assets, liabilities and contingent liabilities of the acquired entity or business, including any intangible assets identified in the business combination which might not have been recognised by the acquiree, are estimated and recognised in the consolidated balance sheet; the Group also estimates the amount of any non-controlling interests and the fair value of the previously held equity interest in the acquiree. - Any positive difference between the aforementioned items is recognised as discussed in Note 2.m. Any negative difference is recognised under negative goodwill recognised in the consolidated income statement. Goodwill is only calculated and recognised once, when control of a business or an entity is obtained. vi. Acquisitions and disposals not giving rise to a change in control are recognised as equity transactions, and no gain or loss is recognised in the income statement and the initially recognised goodwill is not remeasured. The difference between the consideration transferred or received and the decrease or increase in non-controlling interests, respectively, is recognised in reserves. Similarly, when control over a subsidiary is lost, the assets, liabilities and non-controlling interests and any other items recognised in Other Comprehensive income of that company are derecognised from the consolidated balance sheet, and the fair value of the consideration received and of any remaining equity interest is recognised. The difference between these amounts is recognised in profit or loss. vii. Note 3 provides information on the most significant acquisitions and disposals in the last three years.
Definitions and classification of financial instruments	c) i. A financial instrument is any contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity. An equity instrument is a contract that evidences a residual interest in the assets of the issuing entity after deducting all of its liabilities. A financial derivative is a financial instrument whose value changes in response to the change in an observable market variable (such as an interest rate, foreign exchange rate, financial instrument price, market index or credit rating), whose initial investment is very small compared with other financial instruments with a similar response to changes in market factors, and which is generally settled at a future date. Hybrid financial instruments are contracts that simultaneously include a non-derivative host contract together with a derivative, known as an embedded derivative, that is not separately transferable and has the effect that some of the cash flows of the hybrid contract vary in a way similar to a stand-alone derivative. Compound financial instruments are contracts that simultaneously create for their issuer a financial liability and an own equity instrument (such as convertible bonds, which entitle their holders to convert them into equity instruments of the issuer). The preference shares contingently convertible into ordinary shares eligible as Additional Tier 1 capital (“CCPSs”) -perpetual shares, which may be repurchased by the issuer in certain circumstances, the interest on which is discretionary, and would convert into a variable number of newly issued ordinary shares if the capital ratio of the Bank or its consolidated group falls below a given percentage (trigger event), as those two terms are defined in the related issue prospectuses- are recognised for accounting purposes by the Group as compound instruments. The liability component reflects the issuer’s obligation to deliver a variable number of shares and the equity component reflects the issuer’s discretion in relation to the payment of the related coupons. In order to effect the initial allocation, the Group estimates the fair value of the liability as the amount that would have to be delivered if the trigger event were to occur immediately and, accordingly, the equity component, calculated as the residual amount, is zero. In view of the aforementioned discretionary nature of the payment of the coupons, they are deducted directly from equity. Capital perpetual preference shares (“CPPSs”), with the possibility of purchase by the issuer in certain circumstances, whose remuneration is discretionary, and which will be amortised permanently, totally or partially, in the event that the Bank or its consolidated group submits a capital ratio lesser than a certain percentage (trigger event), as defined in the corresponding prospectuses, are accounted for by the Group as equity instruments. The following transactions are not treated for accounting purposes as financial instruments: - Investments in associates and joint ventures (see Note 13). - Rights and obligations under employee benefit plans (see Note 25). - Rights and obligations under insurance contracts (see Note 15). - Contracts and obligations relating to employee remuneration based on own equity instruments (see Note 34). ii. Financial assets are initially classified into the various categories used for management and measurement purposes, unless they have to be presented as Non-current assets held for sale or they relate to Cash, cash balances at central banks and other deposits on demand, Changes in the fair value of hedged items in portfolio hedges of interest rate risk (asset side), Hedging derivatives and Investments, which are reported separately. Classification of financial instruments: the classification criteria for financial assets depends on the business model for their management and the characteristics of their contractual flows. The Group's business models refer to the way in which it manages its financial assets to generate cash flows. In defining these models, the Group takes into account the following factors: - How key management staff are assessed and reported on the performance of the business model and the financial assets held in the business model. - The risks that affect the performance of the business model (and the financial assets held in the business model) and, specifically, the way in which these risks are managed. - How business managers are remunerated. - The frequency and volume of sales in previous years, as well as expectations of future sales. The analysis of the characteristics of the contractual flows of financial assets requires an assessment of the congruence of these flows with a basic loan agreement. Contractual cash flows that are only principal and interest payments on the outstanding principal amount meet this requirement. Depending on these factors, the asset can be measured at amortised cost, at fair value with changes in other comprehensive income, or at fair value with changes through profit and loss. IFRS9 also establishes an option to designate an instrument at fair value with changes in profit or loss, under certain conditions. The Group uses the following criteria for the classification of financial debt instruments: - Amortised cost: financial instruments under a business model whose objective is to collect principal and interest flows, over which there is no significant unjustified sales and fair value is not a key element in the management of these assets and contractual conditions they give rise to cash flows on specific dates, which are only payments of principal and interest on the outstanding principal amount. In this sense, unjustified sales are considered to be those other than those related to an increase in the credit risk of the asset, unanticipated funding needs (stress case scenarios). Additionally, the characteristics of its contractual flows represent substantially a “basic financing agreement”. - Fair value with changes in other comprehensive income: financial instruments held in a business model whose objective is to collect principal and interest cash flows and the sale of these assets, where fair value is a key factor in their management. Additionally, the contractual cash flow characteristics substantially represent a “basic financing agreement”. - Fair value with changes in profit or loss: financial instruments included in a business model whose objective is not obtained through the above mentioned models, where fair value is a key factor in managing of these assets, and financial instruments whose contractual cash flow characteristics do not substantially represent a “basic financing agreement”. In this section it can be enclosed the portfolios classified under “Financial assets held for trading”, “Non-trading financial assets mandatorily at fair value through profit or loss” and “Financial assets at fair value through profit or loss”. Equity instruments will be classified at fair value under IFRS9, with changes in profit or loss, unless the Group decides, for non-trading assets, to classify them at fair value with changes in other comprehensive income (irrevocably) in the initial moment. The Group has generally applied this option to the equity instruments classified as “Available-for-sale” at December 31, 2017 under IAS39. In general, the Group has applied this option in the case of equity instruments classified under "Available for Sale" at December 31, 2017 under IAS39. Until December 31, 2017, the Group applied IAS39, under which the following three categories existed that are not applicable under IFRS9 (See note 1.b): - Financial assets available-for-sale: this category includes debt instruments not classified as Held-to-maturity investments, Loans and receivables or Financial assets at fair value through profit or loss, and equity instruments issued by entities other than subsidiaries, associates and joint ventures, provided that such instruments have not been classified as Financial assets held for trading or as Financial assets designated at fair value through profit or loss. - Loans and receivables: this category includes the investment arising from ordinary lending activities, such as the cash amounts of loans drawn down and not yet repaid by customers or the deposits placed with other institutions, whatever the legal instrument, unquoted debt securities and receivables from the purchasers of goods, or the users of services, constituting part of the Group's business. - Investments held-to-maturity: this category includes debt instruments with fixed maturity and with fixed or determinable payments, for which the Group has both the intention and proven ability to hold to maturity. iii. Financial assets are classified by nature into the following items in the consolidated balance sheet: - Cash, cash balances at Central Banks and other deposits on demand: cash balances and balances receivable on demand relating to deposits with central banks and credit institutions. - Loans and advances: includes the debit balances of all credit and loans granted by the Group, other than those represented by securities, as well as finance lease receivables and other debit balances of a financial nature in favour of the Group, such as cheques drawn on credit institutions, balances receivable from clearing houses and settlement agencies for transactions on the stock exchange and organised markets, bonds given in cash, capital calls, fees and commissions receivable for financial guarantees and debit balances arising from transactions not originating in banking transactions and services, such as the collection of rentals and similar items. They are classified, on the basis of the institutional sector to which the debtor belongs, into: - Central banks: credit of any nature, including deposits and money market transactions received from the Bank of Spain or other central banks. - Credit institutions: credit of any nature, including deposits and money market transactions, in the name of credit institutions. - Customers: includes the remaining credit, including money market transactions through central counterparties. - Debt instruments: bonds and other securities that represent a debt for their issuer, that generate an interest return, and that are in the form of certificates or book entries. - Equity instruments: financial instruments issued by other entities, such as shares, which have the nature of equity instruments for the issuer, other than investments in subsidiaries, joint ventures or associates. Investment fund units are included in this item. - Derivatives: includes the fair value in favour of the Group of derivatives which do not form part of hedge accounting, including embedded derivatives separated from hybrid financial instruments. - Changes in the fair value of hedged items in portfolio hedges of interest rate risk: this item is the balancing entry for the amounts credited to the consolidated income statement in respect of the measurement of the portfolios of financial instruments which are effectively hedged against interest rate risk through fair value hedging derivatives. - Hedging derivatives: Includes the fair value in favour of the Group of derivatives, including embedded derivatives separated from hybrid financial instruments, designated as hedging instruments in hedge accounting. iv. Financial liabilities are initially classified into the various categories used for management and measurement purposes, unless they have to be presented as Liabilities associated with non-current assets held for sale or they relate to Hedging derivatives or Changes in the fair value of hedged items in portfolio hedges of interest rate risk (liability side), which are reported separately. IAS39 financial liabilities classification and measurement criteria remains substantially unchanged under IFRS9. Nevertheless, in most cases, the changes in the fair value of financial liabilities designated at fair value with changes recognised through profit or loss for the year, due to the entity credit risk, are classified under other comprehensive income. Financial liabilities are included for measurement purposes in one of the following categories: - Financial liabilities held for trading (at fair value through profit or loss): this category includes financial liabilities incurred for the purpose of generating a profit in the near term from fluctuations in their prices, financial derivatives not designated as hedging instruments, and financial liabilities arising from the outright sale of financial assets acquired under reverse repurchase agreements (“reverse repos”) or borrowed (short positions). - Financial liabilities designated at fair value through profit or loss: financial liabilities are included in this category when they provide more relevant information, either because this eliminates or significantly reduces recognition or measurement inconsistencies (accounting mismatches) that would otherwise arise from measuring assets or liabilities or recognising the gains or losses on them on different bases, or because a group of financial liabilities or financial assets and liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided on that basis to the Group’s key management personnel. Liabilities may only be included in this category on the date when they are incurred or originated. - Financial liabilities at amortised cost: financial liabilities, irrespective of their instrumentation and maturity, not included in any of the above-mentioned categories which arise from the ordinary borrowing activities carried on by financial institutions. v. Financial liabilities are classified by nature into the following items in the consolidated balance sheet: - Deposits: includes all repayable balances received in cash by the Group, other than those instrumented as marketable securities and those having the substance of subordinated liabilities (amount of the loans received, which for credit priority purposes are after common creditors), except for the debt instruments. This item also includes cash bonds and cash consignments received the amount of which may be invested without restriction. Deposits are classified on the basis of the creditor’s institutional sector into: - Central banks: deposits of any nature, including credit received and money market transactions received from the Bank of Spain or other central banks. - Credit institutions: deposits of any nature, including credit received and money market transactions in the name of credit institutions. - Customer: includes the remaining deposits, including money market transactions through central counterparties. - Marketable debt securities: includes the amount of bonds and other debt represented by marketable securities, other than those having the substance of subordinated liabilities (amount of the loans received, which for credit priority purposes are after common creditors, and includes the amount of the financial instruments issued by the Group which, having the legal nature of capital, do not meet the requirements to qualify as equity, such as certain preferred shares issued). This item includes the component that has the consideration of financial liability of the securities issued that are compound financial instruments. - Derivatives: includes the fair value, with a negative balance for the Group, of derivatives, including embedded derivatives separated from the host contract, which do not form part of hedge accounting. - Short positions: includes the amount of financial liabilities arising from the outright sale of financial assets acquired under reverse repurchase agreements or borrowed. - Other financial liabilities: includes the amount of payment obligations having the nature of financial liabilities not included in other items, and liabilities under financial guarantee contracts, unless they have been classified as non-performing. - Changes in the fair value of hedged items in portfolio hedges of interest rate risk: this item is the balancing entry for the amounts charged to the consolidated income statement in respect of the measurement of the portfolios of financial instruments which are effectively hedged against interest rate risk through fair value hedging derivatives. - Hedging derivatives: includes the fair value of the Group’s liability in respect of derivatives, including embedded derivatives separated from hybrid financial instruments, designated as hedging instruments in hedge accounting.
Measurement of financial assets and liabilities and recognition of fair value changes	d) In general, financial assets and liabilities are initially recognised at fair value which, in the absence of evidence to the contrary, is deemed to be the transaction price. Financial instruments not measured at fair value through profit or loss are adjusted by the transaction costs. Financial assets and liabilities are subsequently measured at each year-end as follows: i. Financial assets are measured at fair value are valued mainly at their fair value without deducting any transaction cost for their sale. The fair value of a financial instrument on a given date is taken to be the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. The most objective and common reference for the fair value of a financial instrument is the price that would be paid for it on an active, transparent and deep market (quoted price or market price). At December 31, 2018 there were no significant investments in quoted financial instruments that had ceased to be recognised at their quoted price because their market could not be deemed to be assets. If there is no market price for a given financial instrument, its fair value is estimated on the basis of the price established in recent transactions involving similar instruments and, in the absence thereof, of valuation techniques commonly used by the international financial community, taking into account the specific features of the instrument to be measured and, particularly, the various types of risk associated with it. All derivatives are recognised in the balance sheet at fair value from the trade date. If the fair value is positive, they are recognised as an asset and if the fair value is negative, they are recognised as a liability. The fair value on the trade date is deemed, in the absence of evidence to the contrary, to be the transaction price. The changes in the fair value of derivatives from the trade date are recognised in Gains/losses on financial assets and liabilities held for trading (net) in the consolidated income statement. Specifically, the fair value of financial derivatives traded in organised markets included in the portfolios of financial assets or liabilities held for trading is deemed to be their daily quoted price and if, for exceptional reasons, the quoted price cannot be determined on a given date, these financial derivatives are measured using methods similar to those used to measure OTC derivatives. The fair value of OTC derivatives is taken to be the sum of the future cash flows arising from the instrument, discounted to present value at the date of measurement (present value or theoretical close) using valuation techniques commonly used by the financial markets: net present value (NPV), option pricing models and other methods. The amount of debt securities and loans and advances under a business model whose objective is to collect the principal and interest flows are valued at their amortised cost, using the effective interest rate method in their determination. Amortised cost refers to the acquisition cost of a corrected financial asset or liability (more or less, as the case may be) for repayments of principal and the part systematically charged to the consolidated income statement of the difference between the initial cost and the corresponding reimbursement value at expiration. In the case of financial assets, the amortised cost includes, in addition, the corrections to their value due to the impairment. In the loans and advances covered in fair value hedging transactions, the changes that occur in their fair value related to the risk or the risks covered in these hedging transactions are recorded. The effective interest rate is the discount rate that exactly matches the carrying amount of a financial instrument to all its estimated cash flows of all kinds over its remaining life. For fixed rate financial instruments, the effective interest rate coincides with the contractual interest rate established on the acquisition date plus, where applicable, the fees and transaction costs that, because of their nature, form part of their financial return. In the case of floating rate financial instruments, the effective interest rate coincides with the rate of return prevailing in all connections until the next benchmark interest reset date. Equity instruments and contracts related with these instruments are measured at fair value. However, in certain circumstances the Group estimates cost value as a suitable estimate of the fair value. This can happen if the recent event available information is not enough to measure the fair value or if there is a broad range of possible measures and the cost value represents the best estimates of fair value within this range. The amounts at which the financial assets are recognised represent, in all material respects, the Group’s maximum exposure to credit risk at each reporting date. Also, the Group has received collateral and other credit enhancements to mitigate its exposure to credit risk, which consist mainly of mortgage guarantees, cash collateral, equity instruments and personal security, assets leased out under finance lease and full-service lease agreements, assets acquired under repurchase agreements, securities loans and credit derivatives. ii. In general, financial liabilities are measured at amortised cost, as defined above, except for those included under Financial liabilities held for trading and Financial liabilities designated at fair value through profit or loss and financial liabilities designated as hedged items (or hedging instruments) in fair value hedges, which are measured at fair value. iii. The following table shows a summary of the fair values, at the end of 2018, 2017 and 2016, of the financial assets and liabilities indicated below, classified on the basis of the various measurement methods used by the Group to determine their fair value: Million of euros 2018 (*) 2017 2016 Published Published Published price price price quotations Internal quotations Internal quotations Internal in active models in active Models in active models markets (Level 2 markets (Level 2 markets (Level 2 (Level 1) and 3) Total (Level 1) and 3) Total (Level 1) and 3) Total Financial assets held for trading 37,108 55,771 92,879 58,215 67,243 125,458 64,259 83,928 148,187 Non-trading financial assets mandatorily at fair value through profit or loss 1,835 8,895 10,730 — — — — — — Financial assets designated at fair value through profit or loss 3,102 54,358 57,460 3,823 30,959 34,782 3,220 28,389 31,609 Financial assets at fair value through other comprehensive income 103,590 17,501 121,091 — — — — — — Financial assets available-for-sale (**) — — — 113,258 18,802 132,060 89,563 25,862 115,425 Hedging derivatives (assets) — 8,607 8,607 — 8,537 8,537 216 10,161 10,377 Financial liabilities held for trading 16,104 54,239 70,343 21,828 85,796 107,624 20,906 87,859 108,765 Financial liabilities designated at fair value through profit or loss 987 67,071 68,058 769 58,847 59,616 — 40,263 40,263 Hedging derivatives (liabilities) 5 6,358 6,363 8 8,036 8,044 9 8,147 8,156 Liabilities under insurance contracts — 765 765 — 1,117 1,117 — 652 652 (*) See further detail regarding the impacts of the entry into force of IFRS9 as of January 1, 2018 (Note 1.b). (**) In addition to the financial instruments measured at fair value shown in the foregoing table, at December 31, 2017 and 2016, the Group held equity instruments classified as Financial assets available-for-sale and carried at cost amounting to EUR 1,211 million and EUR 1,349 million, respectively (see Note 51.c). The financial instruments at fair value determined on the basis of published price quotations in active markets (Level 1) include government debt securities, private-sector debt securities, derivatives traded in organised markets, securitised assets, shares, short positions and fixed-income securities issued. In cases where price quotations cannot be observed, management makes its best estimate of the price that the market would set, using its own internal models. In most cases, these internal models use data based on observable market parameters as significant inputs (Level 2) and, in cases, they use significant inputs not observable in market data (Level 3). In order to make these estimates, various techniques are employed, including the extrapolation of observable market data. The best evidence of the fair value of a financial instrument on initial recognition is the transaction price, unless the fair value of the instrument can be obtained from other market transactions performed with the same or similar instruments or can be measured by using a valuation technique in which the variables used include only observable market data, mainly interest rates. The Group has developed a formal process for the systematic valuation and management of financial instruments, which has been implemented worldwide across all the Group’s units. The governance scheme for this process distributes responsibilities between two independent divisions: Treasury (development, marketing and daily management of financial products and market data) and Risk (on a periodic basis, validation of pricing models and market data, computation of risk metrics, new transaction approval policies, management of market risk and implementation of fair value adjustment policies). The approval of new products follows a sequence of steps (request, development, validation, integration in corporate systems and quality assurance) before the product is brought into production. This process ensures that pricing systems have been properly reviewed and are stable before they are used. The following subsections set forth the most important products and families of derivatives, and the related valuation techniques and inputs, by asset class: Fixed income and inflation The fixed income asset class includes basic instruments such as interest rate forwards, interest rate swaps and cross currency swaps, which are valued using the net present value of the estimated future cash flows discounted taking into account basis swap and cross currency spreads determined on the basis of the payment frequency and currency of each leg of the derivative. Vanilla options , including caps, floors and swaptions, are priced using the Black - Scholes model, which is one of the benchmark industry models. More exotic derivatives are priced using more complex models which are generally accepted as standard across institutions. These pricing models are fed with observable market data such as deposit interest rates, futures rates, cross currency swap and constant maturity swap rates, and basis spreads, on the basis of which different yield curves, depending on the payment frequency, and discounting curves are calculated for each currency. In the case of options, implied volatilities are also used as model inputs. These volatilities are observable in the market for cap and floor options and swaptions, and interpolation and extrapolation of volatilities from the quoted ranges are carried out using generally accepted industry models. The pricing of more exotic derivatives may require the use of non-observable data or parameters, such as correlation (among interest rates and cross-asset), mean reversion rates and prepayment rates, which are usually defined from historical data or through calibration. Inflation-related assets include zero-coupon or year-on-year inflation-linked bonds and swaps, valued with the present value method using forward estimation and discounting. Derivatives on inflation indices are priced using standard or more complex bespoke models, as appropriate. Valuation inputs of these models consider inflation-linked swap spreads observable in the market and estimations of inflation seasonality, on the basis of which a forward inflation curve is calculated. Also, implied volatilities taken from zero-coupon and year-on-year inflation options are also inputs for the pricing of more complex derivatives. Equity and foreign exchange The most important products in these asset classes are forward and futures contracts; they also include vanilla, listed and OTC (Over-The-Counter) derivatives on single underlying assets and baskets of assets. Vanilla options are priced using the standard Black-Scholes model and more exotic derivatives involving forward returns, average performance, or digital, barrier or callable features are priced using generally accepted industry models or bespoke models, as appropriate. For derivatives on illiquid stocks, hedging takes into account the liquidity constraints in models. The inputs of equity models consider yield curves, spot prices, dividends, asset funding costs (repo margin spreads), implied volatilities, correlation among equity stocks and indices, and cross-asset correlation. Implied volatilities are obtained from market quotes of European and American-style vanilla call and put options. Various interpolation and extrapolation techniques are used to obtain continuous volatility for illiquid stocks. Dividends are usually estimated for the mid and long term. Correlations are implied, when possible, from market quotes of correlation-dependent products. In all other cases, proxies are used for correlations between benchmark underlyings or correlations are obtained from historical data. The inputs of foreign exchange models include the yield curve for each currency, the spot foreign exchange rate, the implied volatilities and the correlation among assets of this class. Volatilities are obtained from European call and put options which are quoted in markets as of-the-money, risk reversal or butterfly options. Illiquid currency pairs are usually handled by using the data of the liquid pairs from which the illiquid currency can be derived. For more exotic products, unobservable model parameters may be estimated by fitting to reference prices provided by other non-quoted market sources. Credit The most common instrument in this asset class is the credit default swap (CDS), which is used to hedge credit exposure to third parties. In addition, models for first-to-default (FTD), n-to-default (NTD) and single-tranche collateralised debt obligation (CDO) products are also available. These products are valued with standard industry models, which estimate the probability of default of a single issuer (for CDS) or the joint probability of default of more than one issuer for FTD, NTD and CDO. Valuation inputs are the yield curve, the CDS spread curve and the recovery rate. For indices and important individual issuers, the CDS spread curve is obtained in the market. For less liquid issuers, this spread curve is estimated using proxies or other credit-dependent instruments. Recovery rates are usually set to standard values. For listed single-tranche CDO, the correlation of joint default of several issuers is implied from the market. For FTD, NTD and bespoke CDO, the correlation is estimated from proxies or historical data when no other option is available. Valuation adjustment for counterparty risk or default risk The Credit valuation adjustment (CVA) is a valuation adjustment to OTC derivatives as a result of the risk associated with the credit exposure assumed to each counterparty. The CVA is calculated taking into account potential exposure to each counterparty in each future period. The CVA for a specific counterparty is equal to the sum of the CVA for all the periods. The following inputs are used to calculate the CVA: - Expected exposure: including for each transaction the mark-to-market (MtM) value plus an add-on for the potential future exposure for each period. Mitigating factors such as collateral and netting agreements are taken into account, as well as a temporary impairment factor for derivatives with interim payments. - Loss Given Default: percentage of final loss assumed in a counterparty credit event/default. - Probability of default: for cases where there is no market information (the CDS quoted spread curve, etc.), proxies based on companies holding exchange-listed CDS, in the same industry and with the same external rating as the counterparty, are used. - Discount factor curve. The debit valuation adjustment (DVA) is a valuation adjustment similar to the CVA but, in this case, it arises as a result of the Group’s own risk assumed by its counterparties in OTC derivatives. The CVA at December 31, 2018 amounted to EUR 351 million (8.8% compared to December 31, 2017) and DVA amounted to EUR 261 million (18.9% compared to December 31, 2017). The variations are due to the fact that credit spreads for the most liquid maturities have been increased in percentages over 30%. In addition, the Group amounts the funding fair value adjustment (FFVA) is calculated by applying future market funding spreads to the expected future funding exposure of any uncollateralised component of the OTC derivative portfolio. This includes the uncollateralised component of collateralised derivatives in addition to derivatives that are fully uncollateralised. The expected future funding exposure is calculated by a simulation methodology, where available. The FFVA impact is not material for the consolidated financial statements as of December 31, 2018, 2017 and 2016. As a result of the first application of IFRS9, the exposure at January 1, 2018, in level 3 financial instruments, has increased by EUR 2,183 million, mainly for loans and receivables, arising from new requirements regarding the classification and measurement of amortised cost items at other fair value items whose value is calculated using unobservable market inputs (see note 1.b). In addition, the Group has reclassified in 2018 to level 3 the market value of certain transactions of bonds, long-term repos and derivatives for an approximate amount of EUR 1,300 million, the reason for this classification has been mainly due to lack of liquidity in certain significant inputs in the fair value of the aforementioned financial instruments. In addition, during 2016 the Group carried out a review of its financial instruments valuation processes with the purpose of increasing the observability of certain inputs and parameters used in its valuation techniques. As a result of this review, it started to receive prices of interest rate derivatives with the option of a clear type of discount for EUR and USD and correlations between pairs of shares to services of consensus pricing, which has allowed to incorporate the inputs obtained directly or inferred from instrument prices, in their internal valuation processes. As a consequence, those non-observable inputs (the parameter of the reversion to the average of the interest rates and the correlations between shares, respectively) used in the valuation of interest rate derivatives with the option of cancelling type EUR and USD and derivatives on Stock baskets had become measurable and considered observable parameters, and therefore, these products were reclassified from Level 3 to Level 2. During 2018, 2017 and 2016 the Group has not carried out significant reclassifications of financial instruments between levels except the changes disclosed in the level 3 table. Valuation adjustments due to model risk The valuation models described above do not involve a significant level of subjectivity, since they can be adjusted and recalibrated, where appropriate, through internal calculation of the fair value and subsequent comparison with the related actively traded price. However, valuation adjustments may be necessary when market quoted prices are not available for comparison purposes. The sources of risk are associated with uncertain model parameters, illiquid underlying issuers, and poor quality market data or missing risk factors (sometimes the best available option is to use limited models with controllable risk). In these situations, the Group calculates and applies valuation adjustments in accordance with common industry practice. The main sources of model risk are described below: - In the fixed income markets, the sources of model risk include bond index correlations, basis spread modelling, the risk of calibrating model parameters and the treatment of near-zero or negative interest rates. Other sources of risk arise from the estimation of market data, such as volatilities or yield curves, whether used for estimation or cash flow discounting purposes. - In the equity markets, the sources of model risk include forward skew modelling, the impact of stochastic interest rates, correlation and multi-curve modelling. Other sources of risk arise from managing hedges of digital callable and barrier option payments. Also worthy of consideration as sources of risk are the estimation of market data such as dividends and correlation for quanto and composite basket options. - For specific financial instruments relating to home mortgage loans secured by financial institutions in the UK (which are regulated and partially financed by the Government) and property asset derivatives, the main input is the Halifax House Price Index (HPI). In these cases, risk assumptions include estimations of the future growth and the volatility of the HPI, the mortality rate and the implied credit spreads. - Inflation markets are exposed to model risk resulting from uncertainty around modelling the correlation structure among various CPI rates. Another source of risk may arise from the bid-offer spread of inflation-linked swaps. - The currency markets are exposed to model risk resulting from forward skew modelling and the impact of stochastic interest rate and correlation modelling for multi-asset instruments. Risk may also arise from market data, due to the existence of specific illiquid foreign exchange pairs. - The most important source of model risk for credit derivatives relates to the estimation of the correlation between the probabilities of default of different underlying issuers. For illiquid underlying issuers, the CDS spread may not be well defined. Set forth below are the financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3) at December 31, 2018, 2017 and 2016: Million of euros Fair values calculated using internal models at 12/31/18 (**) (*) Level 2 Level 3 Valuation techniques Main assumptions ASSETS: 140,659 4,473 Financial assets held for trading 55,033 738 Credit institutions — — Present value method Yield curves, FX market prices Customers (***) 205 — Present value method Yield curves, FX market prices Debt and equity instruments 314 153 Present value method Yield curves, HPI, FX market prices Derivatives 54,514 585 Swaps 44,423 185 Present value method, Gaussian Copula (****) Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 617 2 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 3,778 149 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures — — Present value method Yield curves, FX market prices Index and securities options 1,118 198 Black-Scholes Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 4,578 51 Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX and EQ market prices, Dividends, Correlation, Liquidity, Others Hedging derivatives 8,586 21 Swaps 7,704 21 Present value method FX market prices, Yield curves, Basis Interest rate options 20 — Black's Model FX market prices, Yield curves, Volatility surfaces Other 862 — Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity, Others Non-trading financial assets mandatorily at fair value through profit or loss 7,492 1,403 Equity instruments 985 462 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 5,085 481 Present value method Interest rates curves Loans and receivables (***) 1,422 460 Present value method, swap asset model & CDS Interest rates curves and Credit curves Financial assets designated at fair value through profit or loss 53,482 876 Central banks 9,226 — Present value method Interest rates curves, FX market prices Credit institutions 22,897 201 Present value method Interest rates curves, FX market prices Customers 21,355 560 Present value method Interest rates curves, FX market prices, HPI Debt instruments 4 115 Present value method Interest rates curves, FX market prices Financial assets at fair value through other comprehensive income 16,066 1,435 Equity instruments 455 581 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 14,699 165 Present value method Interest rates curves, FX market prices Loans and receivables 912 689 Present value method Interest rates curves, FX market prices and Credit curves Financial assets available for sale — — Debt instruments — — LIABILITIES 127,991 442 Financial liabilities held for trading 53,950 289 Central banks — — Present value method Yield curves, FX market prices Credit institutions — — Present value method Yield curves, FX market prices Customers — — Present value method Yield curves, FX market prices Derivatives 53,950 289 Swaps 43,489 111 Present value method, Gaussian Copula (****) Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 610 7 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 4,411 26 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Index and securities options 1,233 143 Black-Scholes Model Yield curves, FX market prices Interest rate and equity futures 7 — Black's Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 4,200 2 Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Short positions — — Present value method Yield curves ,FX & EQ market prices, Equity Hedging derivatives 6,352 6 Swaps 5,868 6 Present value method Yield curves ,FX & EQ market prices, Basis Interest rate options 158 — Black's Model Yield curves , Volatility surfaces, FX market prices, Liquidity Other 326 — Present value method, Advanced stochastic volatility models and other Yield curves , Volatility surfaces, FX market prices, Liquidity, Other Financial liabilities designated at fair value through profit or loss 66,924 147 Present value method Yield curves, FX market prices Liabilities under insurance contracts 765 — Million of euros Fair values calculated using internal models at 12/31/17 (**) 12/31/16 (**) Level 2 Level 3 Level 2 Level 3 Valuation techniques ASSETS: 124,178 1,363 146,991 1,349 Financial assets held for trading 66,806 437 83,587 341 Credit institutions 1,696 — 3,220 — Present value method Customers (***) 8,815 — 9,504 — Present value method Debt and equity instruments 335 32 798 40 Present value method Derivatives 55,960 405 70,065 301 Swaps 44,766 189 53,499 55 Present value method, Gaussian Copula (****) Exchange rate options 463 5 524 2 Black-Scholes Model Interest rate options 4,747 162 5,349 173 Black's Model, Heath-Jarrow- Morton Model Interest rate futures 2 — 1,447 — Present value method Index and securities options 1,257 5 1,725 26 Black-Scholes Model Other 4,725 44 7,521 45 Present value method, Monte Carlo simulation and others Hedging derivatives 8,519 18 10,134 27 Swaps 7,896 18 9,737 27 Present value method Interest rate options 13 — 13 — Black’s Model Other 610 — 384 — N/A Financial assets designated at fair value through profit or loss 30,677 282 28,064 325 Credit institutions 9,889 — 10,069 — Present value method Customers (*****) 20,403 72 17,521 74 Present value method Debt and equity instruments 385 210 474 251 Present value method Financial assets available-for-sale 18,176 626 25,206 656 Debt and equity instruments 18,176 626 25,206 656 Present value method LIABILITIES: 153,600 196 136,835 86 Financial liabilities held for trading 85,614 182 87,790 69 Central banks 282 — 1,351 — Present value method Credit institutions 292 — 44 — Present value method Customers 28,179 — 9,996 — Present value method Derivatives 56,860 182 73,481 69 Swaps 45,041 100 57,103 1 Present value method, Gaussian Copula (****) Exchange rate options 497 9 413 — Black-Scholes Model Interest rate options 5,402 19 6,485 21 Black's Model, Heath-Jarrow- Morton Model Index and securities options 1,527 41 1,672 46 Black-Scholes Model Interest rate and equity futures 1 — 1,443 — Black's Model Other 4,392 13 6,365 1 Present value method, Monte Carlo simulation and others Short positions 1 — 2,918 — Present value method Hedging derivatives 8,029 7 8,138 9 Swaps 7,573 7 6,676 9 Present value method Interest rate options 287 — 10 — Black’s Model Other 169 — 1,452 — N/A Financial liabilities designated at fair value through profit or loss 58,840 7 40,255 8 Present value method Liabilities under insurance contracts 1,117 — 652 — See Note 15 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (See Note 1.b) (**) Level 2 internal models use data based on observable market parameters, while level 3 internal models use significant non-observable inputs in market data. (***) Includes mainly short-term loans and reverse repurchase agreements with corporate customers (mainly brokerage and investment companies). (****) Includes credit risk derivatives with a net fair value of EUR 0 million at December 31, 2018 (December 31, 2017 and 2016: net fair value of EUR 0 million and EUR-1 million, respectively). These assets and liabilities are measured using the Standard Gaussian Copula Model. (*****) Includes home mortgage loans to financial institutions in the UK (which are regulated and partly financed by the Government). The fair value of these loans was obtained using observable market variables, including current market transactions with similar amounts and collateral facilitated by the UK Housing Association. Since the Government is involved in these financial institutions, the credit risk spreads have remained stable and are homogeneous in this sector. The results arising from the valuation model are checked against current market transactions. Level 3 financial instruments Set forth below are the Group’s main financial instruments measured using unobservable market data as significant inputs of the internal models (Level 3): - Instruments in Santander UK’s portfolio (loans, debt instruments and derivatives) linked to the House Price Index (HPI). Even if the valuation techniques used for these instruments may be the same as those used to value similar products (present value in the case of loans and debt instruments, and the Black-Scholes model for derivatives), the main factors used in the valuation of these instruments are the HPI spot rate, the growth and volatility thereof, and the mortality rates, which are not always observable in the market and, accordingly, these instruments are considered illiquid. · HPI spot rate: for some instruments the NSA HPI spot rate, which is directly observable and published on a monthly basis, is used. For other instruments where regional HPI rates must be used (published quarterly), adjustments are made to reflect the different composition of the rates and adapt them to the regional composition of Santander UK’s portfolio. · HPI growth rate: this is not always directly observable in the market, especially for long maturities, and is estimated in accordance with existing quoted prices. To reflect the uncertainty implicit in these estimates, adjustments are made based on an analysis of the historical volatility of the HPI, incorporating reversion to the mean. · HPI volatility: the long-term volatility is not directly observable in the market but is estimated on the basis of shorter-term quoted prices and by making an adjustment to reflect the existing uncertainty, based on the standard deviation of historical volatility over various time periods. · Mortality rates: these are based on published official tables and adjusted to reflect the composition of the customer portfolio for this type of product at Santander UK. - Callable interest rate derivatives (Bermudan-style options) where the main unobservable input is mean reversion of interest rates. - Trading derivatives on interest rates, taking as an underlying asset titling and wit
Derecognition of financial assets and liabilities	e) The accounting treatment of transfers of financial assets depends on the extent to which the risks and rewards associated with the transferred assets are transferred to third parties: 1. 2. a. An associated financial liability, which is recognised for an amount equal to the consideration received and is subsequently measured at amortised cost, unless it meets the requirements for classification under Financial liabilities designated at fair value through profit or loss. b. The income from the transferred financial asset not derecognised and any expense incurred on the new financial liability, without offsetting. 3. a. If the transferor does not retain control of the transferred financial asset, the asset is derecognised and any rights or obligations retained or created in the transfer are recognised. b. If the transferor retains control of the transferred financial asset, it continues to recognise it for an amount equal to its exposure to changes in value and recognises a financial liability associated with the transferred financial asset. The net carrying amount of the transferred asset and the associated liability is the amortised cost of the rights and obligations retained, if the transferred asset is measured at amortised cost, or the fair value of the rights and obligations retained, if the transferred asset is measured at fair value. Accordingly, financial assets are only derecognised when the rights to the cash flows they generate have expired or when substantially all the inherent risks and rewards have been transferred to third parties. Similarly, financial liabilities are only derecognised when the obligations they generate have been extinguished or when they are acquired with the intention either to cancel them or to resell them.
Offsetting of financial instruments	f) Financial asset and liability balances are offset, i.e. reported in the consolidated balance sheet at their net amount, only if the Group entities currently have a legally enforceable right to set off the recognised amounts and intend either to settle on a net basis, or to realise the asset and settle the liability simultaneously. Following is the detail of financial assets and liabilities that were offset in the consolidated balance sheets as of December 31, 2018, 2017 and 2016: December 31, 2018 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 107,055 (42,509) 64,546 Reverse repurchase agreements 79,114 (4,031) 75,083 Total 186,169 (46,540) 139,629 December 31, 2017 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 103,740 (37,960) 65,780 Reverse repurchase agreements 56,701 (7,145) 49,556 Total 160,441 (45,105) 115,336 December 31, 2016 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 127,679 (45,259) 82,420 Reverse repurchase agreements 53,159 (2,213) 50,946 Total 180,838 (47,472) 133,366 December 31, 2018 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 104,213 (42,509) 61,704 Repurchase agreements 82,201 (4,031) 78,170 Total 186,414 (46,540) 139,874 December 31, 2017 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 103,896 (37,960) 65,936 Repurchase agreements 110,953 (7,145) 103,808 Total 214,849 (45,105) 169,744 December 31, 2016 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 127,784 (45,259) 82,525 Repurchase agreements 82,543 (2,213) 80,330 Total 210,327 (47,472) 162,855 Also, at December 31, 2018 the Group has offset other items amounting to EUR 1,445 million (December 31, 2017 and 2016: EUR 1,645 million and EUR 1,742 million, respectively). At December 31, 2018 the balance sheet shows the amounts EUR 128,637 million (2017: EUR 97,017 million and 2016: EUR 110,445 million) on derivatives and repos as assets and EUR 130,969 million (2017: EUR 153,566 million and 2016: EUR 137,097 million) on derivatives and repos as liabilities that are subject to netting and collateral arrangements.
Impairment of financial assets	g) i. The Group associates an impairment in the value to financial assets measured at amortised cost, debt instruments measured at fair value with changes in other comprehensive income, lease receivables and commitments and guarantees granted that are not measured at fair value. The impairment for expected credit losses is recorded with a charge to the consolidated income statement for the period in which the impairment arises. In the event of occurrence, the recoveries of previously recognised impairment losses are recorded in the consolidated income statement for the period in which the impairment no longer exists or is reduced. In the case of purchased or originated credit-impaired assets, the Group only recognizes at the reporting date the changes in the expected credit losses during the life of the asset since the initial recognition as a credit loss. In the case of assets measured at fair value with changes in other comprehensive income, the changes in the fair value due to expected credit losses are charged in the consolidated income statement of the year where the change happened, reflecting the rest of the valuation in other comprehensive income. As a rule, the expected credit loss is estimated as the difference between the contractual cash flows to be recovered and the expected cash flows discounted using the original effective interest rate. In the case of purchased or originated credit-impaired assets, this difference is discounted using the effective interest rate adjusted by credit rating. Depending on the classification of financial instruments, which is mentioned in the following sections, the expected credit losses may be along 12 months or during the life of the financial instrument: - 12-month expected credit losses: arising from the potential default events, as defined in the following sections that are estimated to be likely to occur within the 12 months following the reporting date. These losses will be associated with financial assets classified as "normal risk" as defined in the following sections. - Expected credit losses over the life of the financial instrument: arising from the potential default events that are estimated to be likely to occur throughout the life of the financial instruments. These losses are associated with financial assets classified as "normal risk under watchlist" or "doubtful risk". With the purpose of estimating the expected life of the financial instrument all the contractual terms have been taken into account (e.g. prepayments, duration, purchase options, etc.), being the contractual period (including extension options) the maximum period considered to measure the expected credit losses. In the case of financial instruments with an uncertain maturity period and a component of undrawn commitment (e.g.: credit cards), the expected life is estimated through quantitative analyses to determine the period during which the entity is exposed to credit risk, also considering the effectiveness of management procedures that mitigate such exposure (e.g. the ability to unilaterally cancel such financial instruments, etc.). The following constitute effective guarantees: a) Mortgage guarantees on housing as long as they are first duly constituted and registered in favour of the entity. The properties include: i. Buildings and building elements, distinguishing among: - Houses; - Offices, stores and multi-purpose premises; - Rest of buildings such as non-multi-purpose premises and hotels. ii. Urban and developable ordered land. iii. Rest of properties that classify as: buildings and building elements under construction, such as property development in progress and halted development, and the rest of land types, such as rustic lands. b) Collateral guarantees on financial instruments in the form of cash deposits and debt securities issued by creditworthy issuers. c) Other types of real guarantees, including properties received in guarantee and second and subsequent mortgages on properties, as long as the entity demonstrates its effectiveness. When assessing the effectiveness of the second and subsequent mortgages on properties the entity will implement particularly restrictive criteria. It will take into account, among others, whether the previous charges are in favour of the entity itself or not and the relationship between the risk guaranteed by them and the property value. d) Personal guarantees, as well as the incorporation of new owners, covering the entire amount of the financial instruments and implying direct and joint liability to the entity of persons or other entities whose solvency is sufficiently proven to ensure the repayment of the loan on the agreed terms. ii. Financial instruments presentation For the purposes of estimating the impairment amount, and in accordance with its internal policies, the Group classifies its financial instruments (financial assets, commitments and guarantees) measured at amortised cost or fair value through other comprehensive income in one of the following categories: - Normal Risk ("Stage 1"): includes all instruments that do not meet the requirements to be classified in the rest of the categories. - Normal risk under watchlist ("Stage 2"): includes all instruments that, without meeting the criteria for classification as doubtful or default risk, have experienced significant increases in credit risk since initial recognition. In order to determine whether a financial instrument has increased its credit risk since initial recognition and is to be classified in Stage 2, the Group considers the following criteria: Quantitative criteria Changes in the risk of a default occurring through the expected life of the financial instrument are analysed and quantified with respect to its credit level in its initial recognition. With the purpose of determining if such changes are considered as significant, with the consequent classification into stage 2, each Group unit has defined the quantitative thresholds to consider in each of its portfolios taking into account corporate guidelines ensuring a consistent interpretation in all units. Qualitative criteria In addition to the quantitative criteria indicated, various indicators are used that are aligned with those used by the Group in the normal management of credit risk. Irregular positions of more than 30 days and renewals (see Note 54.c) are common criteria in all Group units. In addition, each unit can define other qualitative indicators, for each of its portfolios, according to the particularities and normal management practices in line with the policies currently in force (e.g. use of management alerts, etc.). The use of these qualitative criteria is complemented with the use of an expert judgement, under the corresponding governance. In the case of forbearances, instruments classified as "normal risk under watchlist" may be generally reclassified to "normal risk" in the following circumstances: at least two years have elapsed from the date of reclassification to that category or from its forbearance date, the client has paid the accrued principal and interest balance, and the client has no other instruments with more than 30 days past due balances. - Doubtful Risk (“Stage 3"): includes financial instruments, overdue or not, in which, without meeting the circumstances to classify them in the category of default risk, there are reasonable doubts about their total repayment (principal and interests) by the client in the terms contractually agreed. Likewise, off-balance-sheet exposures whose payment is probable and their recovery doubtful are considered in Stage 3. Within this category, two situations are differentiated: - Doubtful risk for non-performing loans: financial instruments, irrespective of the client and guarantee, with balances more than 90 days past due for principal, interest or expenses contractually agreed. This category also includes all loan balances for a client which overdue amount more than 90 days past due is greater than 20% of the loan receivable balance. These instruments may be reclassified to other categories if, as a result of the collection of part of the past due balances, the reasons for their classification in Stage 3 do not remain and the client does not have balances more than 90 days past due in other loans. - Doubtful risk for reasons other than non-performing loans: this category includes doubtful recovery financial instruments that are not more than 90 days past due. The Group considers that a financial instrument to be doubtful for reasons other than delinquency when one or more combined events have occurred with a negative impact on the estimated future cash flows of the financial instrument. To this end, the following indicators, among others, are considered: a) Negative net equity or decrease because of losses of the client's net equity by at least 50% during the last financial year. b) Continued losses or significant decrease in revenue or, in general, in the client's recurring cash flows. c) Generalised delay in payments or insufficient cash flows to service debts. d) Significantly inadequate economic or financial structure or inability to obtain additional financing by the client. e) Existence of an internal or external credit rating showing that the client is in default. f) Existence of overdue customer commitments with a significant amount to public institutions or employees. These financial instruments may be reclassified to other categories if, as a result of an individualised study, reasonable doubts do not remain about the total repayment under the contractually agreed terms and the client does not have balances with more than 90 days past due. In the case of forbearances, instruments classified as doubtful risk may be reclassified to the category of 'normal risk under watchlist' when the following circumstances are present: a minimum period of one year has elapsed from the forbearance date, the client has paid the accrued principal and interest amounts, and the client has no other loan balance with more than 90 days past due. - Default Risk: includes all financial assets, or part of them, for which, after an individualised analysis, their recovery is considered remote due to a notorious and irrecoverable deterioration of their solvency. In any case, except in the case of financial instruments with collateral covering more than 10% of the balance of the loan, the Group considers as a general rule the following as a remote recovery: the loans of clients who are in the liquidation phase of bankruptcy proceedings, doubtful balances due to non-performing loans older than four years in this category and doubtful balances due to non-performing loans whose portion not covered by collateral has been maintained with 100% credit risk coverage for more than two years. A financial asset amount is maintained in the balance sheet until they are considered as a "default risk", either all or a part of it, and the write-off is registered against the balance sheet. In the case of operations that have only been partially derecognised, for forgiveness reasons or because part of the total balance is considered unrecoverable, the remaining amount shall be fully classified in the category of "doubtful risk", except where duly justified. The classification of a financial asset, or part of it, as a 'default risk' does not involve the disruption of negotiations and legal proceedings to recover the amount. iii. Impairment valuation assessment The Group has policies, methods and procedures in place to hedge its credit risk, both due to the insolvency attributable to counterparties and its residence in a specific country. These policies, methods and procedures are applied in the concession, study and documentation of financial assets, commitments and guarantees, as well as in the identification of their impairment and in the calculation of the amounts needed to cover their credit risk. The asset impairment model in IFRS9 applies to financial assets measured at amortised cost, debt instruments at fair value with changes in other comprehensive income, lease receivables and commitments and guarantees granted that are not measured at fair value. The impairment represents the best estimation of the financial assets expected credit losses at the balance sheet date, assessed both individually and collectively. - Individually: for the purposes of estimating the provisions for credit risk arising from the insolvency of a financial instrument, the Group individually assesses impairment by estimating the expected credit losses on those financial instruments that are considered to be significant and with sufficient information to make such an estimate. Therefore, this classification mostly includes wholesale banking customers - Corporations, specialised financing - as well as some of the largest companies – Chartered and real estate developers - from retail banking. The individually assessed impairment estimate is equal to the difference between the gross carrying amount of the financial instrument and the estimated value of the expected cash flows receivable discounted using the original effective interest rate of the transaction. The estimate of these cash flows takes into account all available information on the financial asset and the effective guarantees associated with that asset. - Collectively: the Group also assesses impairment by estimating the expected credit losses collectively in cases where they are not assessed on an individual basis. This includes, for example, loans with individuals, sole proprietors or businesses in retail banking subject to a standardised risk management. For the purposes of the collective assessment of expected credit losses, the Group has consistent and reliable internal models. For the development of these models, instruments with similar credit risk characteristics that are indicative of the debtors' capacity to pay are considered. The credit risk characteristics used to group the instruments are, among others: type of instrument, debtor's sector of activity, geographical area of activity, type of guarantee, aging of past due balances and any other factor relevant to estimating the future cash flows. The Group performs retrospective and monitoring tests to evaluate the reasonableness of the collective estimate. On the other hand, the methodology required to estimate the expected credit loss due to credit events is based on an unbiased and weighted consideration by the probability of occurrence of a series of scenarios, considering a range of three to five possible future scenarios, depending on the characteristics of each unit, which could have an impact on the collection of contractual cash flows, always taking into account the time value of money, as well as all available and relevant information on past events, current conditions and forecasts of the evolution of macroeconomic factors that are shown to be relevant for the estimation of this amount (for example: GDP (Gross Domestic Product), housing price, unemployment rate, etc.). For the estimation of the parameters used in the estimation of impairment provisions (EAD (Exposure at Default), PD (Probability of Default), LGD (Loss Given Default)), the Group based its experience in developing internal models for the estimation of parameters both in the regulatory area and for management purposes, adapting the development of the impairment provision models under IFRS9. - Exposure at default: is the amount of estimated risk incurred at the time of the counterparty's analysis. - Probability of default: is the estimated probability that the counterparty will default on its principal and/or interest payment obligations. - Loss given default: is the estimate of the severity of the loss incurred in the event of non-compliance. It depends mainly on the updating of the guarantees associated with the operation and the future cash flows that are expected to be recovered. The definition of default implemented by the Group for the purpose of calculating the impairment provision models is based on the definition in Article 178 of Regulation 575/2013 of the European Union (CRR), which is fully aligned with the requirements of IFRS9, which considers that a "default" exists in relation to a specific customer/contract when at least one of the following circumstances exists: the entity considers that there are reasonable doubts about the payment of all its credit obligations or that the customer/contract is in an irregular situation for more than 90 days with respect to any significant credit obligation. In addition, the Group considers the risk generated in all cross-border transactions due to circumstances other than the usual commercial risk of insolvency (sovereign risk, transfer risk or risks arising from international financial activity, such as wars, natural catastrophes, balance of payments crisis, etc.). IFRS9 includes a series of practical solutions that can be implemented by entities, with the aim of facilitating its implementation. However, in order to achieve a complete and high-level implementation of the standard, and following the best practices of the industry, the Group does not apply these practical solutions in a generalised manner: - Rebuttable presumption that the credit risk has increased significantly, when payments are more than 30 days past due: this threshold is used as an additional, but not primary, indicator of significant risk increase. Additionally, there may be cases in the Group where its use has been rebutted as a result of studies that show a low correlation of the significant risk increase with this past due threshold. - Assets with low credit risk at the reporting date: the Group assesses the existence of significant risk increase in all its financial instruments. This information is provided in more detail in Note 54.c (Credit risk).
Repurchase agreements and reverse repurchase agreements	h) Purchases (sales) of financial instruments under a non-optional resale (repurchase) agreement at a fixed price (repos) are recognised in the consolidated balance sheet as financing granted (received), based on the nature of the debtor (creditor), under Loans and advances with central banks, Loans and advances to credit institutions or Loans and advances to customers (Deposits from central banks, Deposits from credit institutions or Customer deposits). Differences between the purchase and sale prices are recognised as interest over the contract term.
Non-current assets and Liabilities associated with non-current assets held for sale	i) Non-current assets held for sale includes the carrying amount of individual items, disposal groups or items forming part of a business unit earmarked for disposal (discontinued operations), whose sale in their present condition is highly likely to be completed within one year from the reporting date. Therefore, the recovery of the carrying amount of these items -which can be of a financial nature or otherwise- will foreseeably be effected through the proceeds from their disposal. Specifically, property or other non-current assets received by the consolidated entities as total or partial settlement of their debtors’ payment obligations to them are deemed to be Non-current assets held for sale, unless the consolidated entities have decided to make continuing use of these assets. In this connection, for the purpose of its consideration in the initial recognition of these assets, the Group obtains, at the foreclosure date, the fair value of the related asset through a request for appraisal by external appraisal agencies. The Group has in place a corporate policy that ensures the professional competence and the independence and objectivity of the external appraisal agencies, in accordance with the regulations, which require appraisal agencies to meet independence, neutrality and credibility requirements, so that the use of their estimates does not reduce the reliability of its valuations. This policy establishes that all the appraisal companies and agencies with which the Group works in Spain should be registered in the Official Register of the Bank of Spain and that the appraisals performed by them should follow the methodology established in Ministry of Economy Order ECO/805/2003, of March 27. The main appraisal companies and agencies with which the Group worked in Spain in 2018 are as follows: Eurovaloraciones, S.A., Ibertasa, S.A., Tinsa Tasaciones Inmobiliarias, S.A.U., Krata, S.A. y Valtenic, S.A. Also, this policy establishes that the various subsidiaries abroad work with appraisal companies that have recent experience in the area and the type of asset under appraisal and meet the independence requirements established in the corporate policy. They should verify, inter alia, that the appraisal company is not a party related to the Group and that its billings to the Group in the last twelve months do not exceed 15% of the appraisal company’s total billings. Liabilities associated with non-current assets held for sale includes the balances payable arising from the assets held for sale or disposal groups and from discontinued operations. Non-current assets and disposal groups of items that have been classified as held for sale are generally recognised at the date of their allocation to this category and are subsequently valued at the lower of their fair value less costs to sell or its book value. Non-current assets and disposal groups of items that are classified as held for sale are not amortised as long as they remain in this category. At December, 31 2018 the fair value less costs to sell of non-current assets held for sale exceeded their carrying amount by EUR 471 million; however, in accordance with the accounting standards, this unrealised gain could not be recognised. The valuation of the portfolio of non-current assets held for sale has been made in compliance with the requirements of International Financial Reporting Standards in relation to the estimate of the fair value of tangible assets and the value-in-use of financial assets. The value of the portfolio is determined as the sum of the values of the individual elements that compose the portfolio, without considering any total or batch grouping in order to correct the individual values. In the case of real estate assets foreclosed in Spain, which represent 86.5% of the Group’s total non-current assets held for sale, the valuation of the portfolio is carried out by applying the following models: - Market Value Model used in the valuation of finished residential properties (housing and parkings) and buildings of a tertiary nature (offices, commercial premises and multipurpose buildings). The current market value of real estate is based on automated valuations obtained by comparison of peers distinguishing by location and typology of the property. In addition, for individual significant assets, complete individual valuations are performed. Valuations made using this method are considered as Level 2. - Market Value Model according to the Evolution of Market Values issued in the valuation of property developments in progress. The current market value of the properties is estimated on the basis of complete individual valuations of third parties, calculated from the values of feasibility studies and development costs of the promotion, as well as selling expenses, distinguishing by location and typology of the property. The valuation of real estate assets under construction is made considering the current situation of the property and not considering the final value of the property. Valuations made using this method are considered as Level 3. - Market Value Model according to the Statistical Evolution of Lands Values (Methodology used in the valuation of lands). A statistical update method is used, taking as reference the indexes published by the Ministry of Development applied to the latest individual valuations (appraisals) carried out by independent valuation companies and agencies. Valuations made using this method are considered as Level 2. In addition, in relation to the previously mentioned valuations, less costs to sell, are contrasted with the sales experience of each type of asset in order to confirm that there is no significant difference between the sale price and the valuation. Impairment losses on an asset or disposal group arising from a reduction in its carrying amount to its fair value (less costs to sell) are recognised under Gains or (losses) on non-current assets held for sale not classified as discontinued operations in the consolidated income statement. The gains on a non-current asset held for sale resulting from subsequent increases in fair value (less costs to sell) increase its carrying amount and are recognised in the consolidated income statement up to an amount equal to the impairment losses previously recognised.
Reinsurance assets and liabilities under insurance contracts	j) Insurance contracts involve the transfer of a certain quantifiable risk in exchange for a periodic or one-off premium. The effects on the Group’s cash flows will arise from a deviation in the payments forecast and/or an insufficiency in the premium set. The Group controls its insurance risk as follows: - By applying a strict methodology in the launch of products and in the assignment of value thereto. - By using deterministic and stochastic actuarial models for measuring commitments. - By using reinsurance as a risk mitigation technique as part of the credit quality guidelines in line with the Group’s general risk policy. - By establishing an operating framework for credit risks. - By actively managing asset and liability matching. - By applying security measures in processes. Reinsurance assets includes the amounts that the consolidated entities are entitled to receive for reinsurance contracts with third parties and, specifically, the reinsurer’s share of the technical provisions recorded by the consolidated insurance entities. At least once a year these assets are reviewed to ascertain whether they are impaired (i.e. there is objective evidence, as a result of an event that occurred after initial recognition of the reinsurance asset, that the Group may not receive all amounts due to it under the terms of the contract and the amount that will not be received can be reliably measured), and any impairment loss is recognised in the consolidated income statement and the assets are written down. Liabilities under insurance contracts includes the technical provisions recorded by the consolidated entities to cover claims arising from insurance contracts in force at year-end. Insurers’ results relating to their insurance business are recognised, according to their nature, under the related consolidated income statement items. In accordance with standard accounting practice in the insurance industry, the consolidated insurance entities credit to the income statement the amounts of the premiums written and charge to income the cost of the claims incurred on final settlement thereof. Insurance entities are therefore required to accrue at period-end the unearned revenues credited to their income statements and the accrued costs not charged to income. At least at each reporting date the Group assesses whether the insurance contract liabilities recognised in the consolidated balance sheet are adequate. For this purpose, it calculates the difference between the following amounts: - Current estimates of future cash flows under the insurance contracts of the consolidated entities. These estimates include all contractual cash flows and any related cash flows, such as claims handling costs; and - The carrying amount recognised in the consolidated balance sheet of its insurance contract liabilities (See Note 15), less any related deferred acquisition costs or related intangible assets, such as the amount paid to acquire, in the event of purchase by the entity, the economic rights held by a broker deriving from policies in the entity’s portfolio. If the calculation results in a positive amount, this deficiency is charged to the consolidated income statement. When unrealised gains or losses on assets of the Group’s insurance companies affect the measurement of liabilities under insurance contracts and/or the related deferred acquisition costs and/or the related intangible assets, these gains or losses are recognised directly in equity. The corresponding adjustment in the liabilities under insurance contracts (or in the deferred acquisition costs or in intangible assets) is also recognised in equity. The most significant items forming part of the technical provisions (see Note 15) are detailed below: - Non-life insurance provisions: i) Provision for unearned premiums: relates to the portion of the premiums received at year-end that is allocable to the period from the reporting date to the end of the policy cover period. ii) Provisions for unexpired risks: this supplements the provision for unearned premiums to the extent that the amount of the latter is not sufficient to reflect all the assessed risks and expenses to be covered by the insurance companies in the policy period not elapsed at the reporting date. - Life insurance provisions: represent the value of the net obligations acquired vis-à-vis life insurance policyholders. These provisions include: iii) Provision for unearned premiums and unexpired risks: this relates to the portion of the premiums received at year-end that is allocable to the period from the reporting date to the end of the policy cover period. iv) Mathematical provisions: these relate to the value of the insurance companies’ obligations, net of the policyholders’ obligations. These provisions are calculated on a policy-by-policy basis using an individual capitalisation system, taking as a basis for the calculation the premium accrued in the year, and in accordance with the technical bases of each type of insurance updated, where appropriate, by the local mortality tables. - Provision for claims outstanding: this reflects the total obligations outstanding arising from claims incurred prior to the reporting date. This provision is calculated as the difference between the total estimated or certain cost of the claims not yet reported, settled or paid and all the amounts already paid in relation to such claims. - Provision for bonuses and rebates: this provision includes the amount of the bonuses accruing to policyholders, insureds or beneficiaries and that of any premiums to be returned to policyholders or insureds, to the extent that such amounts have not been assigned at the reporting date. These amounts are calculated on the basis of the conditions of the related individual policies. - Technical provisions for life insurance policies where the investment risk is borne by the policyholders: these provisions are calculated on the basis of the indices established as a reference to determine the economic value of the policyholders’ rights.
Tangible assets	k) Tangible assets includes the amount of buildings, land, furniture, vehicles, computer hardware and other fixtures owned by the consolidated entities or acquired under finance leases. Tangible assets are classified by use as follows: i. Property, plant and equipment for own use – including tangible assets received by the consolidated entities in full or partial satisfaction of financial assets representing receivables from third parties which are intended to be held for continuing use and tangible assets acquired under finance leases– are presented at acquisition cost, less the related accumulated depreciation and any estimated impairment losses (carrying amount higher than recoverable amount). Depreciation is calculated, using the straight-line method, on the basis of the acquisition cost of the assets less their residual value. The land on which the buildings and other structures stand has an indefinite life and, therefore, is not depreciated. The period tangible asset depreciation charge is recognised in the consolidated income statement and is calculated using the following depreciation rates (based on the average years of estimated useful life of the various assets): Average annual rate Buildings for own use 2.0 % Furniture 7.7 % Fixtures 7.0 % Office and IT equipment 25.0 % Leasehold improvements 7.0 % The consolidated entities assess at the reporting date whether there is any indication that an asset may be impaired (i.e. its carrying amount exceeds its recoverable amount). If this is the case, the carrying amount of the asset is reduced to its recoverable amount and future depreciation charges are adjusted in proportion to the revised carrying amount and to the new remaining useful life (if the useful life has to be re-estimated). Similarly, if there is an indication of a recovery in the value of a tangible asset, the consolidated entities recognise the reversal of the impairment loss recognised in prior periods and adjust the future depreciation charges accordingly. In no circumstances may the reversal of an impairment loss on an asset raise its carrying amount above that which it would have if no impairment losses had been recognised in prior years. The estimated useful lives of the items of property, plant and equipment for own use are reviewed at least at the end of the reporting period with a view to detecting significant changes therein. If changes are detected, the useful lives of the assets are adjusted by correcting the depreciation charge to be recognised in the consolidated income statement in future years on the basis of the new useful lives. Upkeep and maintenance expenses relating to property, plant and equipment for own use are recognised as an expense in the period in which they are incurred, since they do not increase the useful lives of the assets. ii. Investment property Investment property reflects the net values of the land, buildings and other structures held either to earn rentals or for obtaining profits by sales due to future increase in market prices. The criteria used to recognise the acquisition cost of investment property, to calculate its depreciation and its estimated useful life and to recognise any impairment losses thereon are consistent with those described in relation to property, plant and equipment for own use. In order to evaluate the possible impairment the Group determines periodically the fair value of its investment property so that, at the end of the reporting period, the fair value reflects the market conditions of the investment property at that date. This fair value is determined annually, taking as benchmarks the valuations performed by independent experts. The methodology used to determine the fair value of investment property is selected based on the status of the asset in question; thus, for properties earmarked for lease, the valuations are performed using the sales comparison approach, whereas for leased properties the valuations are made primarily using the income capitalisation approach and, exceptionally, the sales comparison approach. In the sales comparison approach, the property market segment for comparable properties is analysed, inter alia, and, based on specific information on actual transactions and firm offers, current prices are obtained for cash sales of those properties. The valuations performed using this approach are considered as Level 2 valuations. In the income capitalisation approach, the cash flows estimated to be obtained over the useful life of the property are discounted taking into account factors that may influence the amount and actual obtainment thereof, such as: (i) the payments that are normally received on comparable properties; (ii) current and probable future occupancy; (iii) the current or foreseeable default rate on payments. The valuations performed using this approach are considered as Level 3 valuations, since significant unobservable inputs are used, such as current and probable future occupancy and/or the current or foreseeable default rate on payments. iii. Property, plant and equipment - Leased out under an operating lease reflects the amount of the tangible assets, other than land and buildings, leased out by the Group under an operating lease. The criteria used to recognise the acquisition cost of assets leased out under operating leases, to calculate their depreciation and their respective estimated useful lives and to recognise the impairment losses thereon are consistent with those described in relation to property, plant and equipment for own use.
Accounting for leases	l) i. Finance leases are leases that transfer substantially all the risks and rewards incidental to ownership of the leased asset to the lessee. When the consolidated entities act as the lessors of an asset, the sum of the present value of the lease payments receivable from the lessee, including the exercise price of the lessee’s purchase option at the end of the lease term when such exercise price is sufficiently below fair value at the option date such that it is reasonably certain that the option will be exercised, is recognised as lending to third parties and is therefore included under Loans and receivables in the consolidated balance sheet. When the consolidated entities act as the lessees, they present the cost of the leased assets in the consolidated balance sheet, based on the nature of the leased asset, and, simultaneously, recognise a liability for the same amount (which is the lower of the fair value of the leased asset and the sum of the present value of the lease payments payable to the lessor plus, if appropriate, the exercise price of the purchase option). The depreciation policy for these assets is consistent with that for property, plant and equipment for own use. In both cases, the finance income and finance charges arising under finance lease agreements are credited and debited, respectively, to interest and similar income and Interest expense and similar charges in the consolidated income statement so as to produce a constant rate of return over the lease term. ii. In operating leases, ownership of the leased asset and substantially all the risks and rewards incidental thereto remain with the lessor. When the consolidated entities act as the lessors, they present the acquisition cost of the leased assets under Tangible assets (See Note 16). The depreciation policy for these assets is consistent with that for similar items of property, plant and equipment for own use, and income from operating leases is recognised on a straight-line basis under Other operating income in the consolidated income statement. When the consolidated entities act as the lessees, the lease expenses, including any incentives granted by the lessor, are charged on a straight-line basis to Other general administrative expenses in their consolidated income statements. The present value calculated applying IAS17 as of December 31, 2018 of the future payments committed by the Group for existing non-cancellable operating lease agreements amounts to EUR 8,699 million, of which EUR 739 million is payable within one year, EUR 2,472 million between one and five years and EUR 5,488 million in more than five years. iii. In sale and leaseback transactions where the sale is at fair value and the leaseback is an operating lease, any profit or loss is recognised at the time of sale. In the case of finance leasebacks, any profit or loss is amortised over the lease term. In accordance with IAS17, in determining whether a sale and leaseback transaction results in an operating lease, the Group should analyse, inter alia, whether at the inception of the lease there are purchase options whose terms and conditions make it reasonably certain that they will be exercised, and to whom the gains or losses from the fluctuations in the fair value of the residual value of the related asset will accrue.
Intangible assets	m) Intangible assets are identifiable non-monetary assets (separable from other assets) without physical substance which arise as a result of a legal transaction or which are developed internally by the consolidated entities. Only assets whose cost can be estimated reliably and from which the consolidated entities consider it probable that future economic benefits will be generated are recognised. Intangible assets are recognised initially at acquisition or production cost and are subsequently measured at cost less any accumulated amortisation and any accumulated impairment losses. i. Any excess of the cost of the investments in the consolidated entities and entities accounted for using the equity method over the corresponding underlying carrying amounts acquired, adjusted at the date of first-time consolidation, is allocated as follows: - If it is attributable to specific assets and liabilities of the companies acquired, by increasing the value of the assets (or reducing the value of the liabilities) whose fair values were higher (lower) than the carrying amounts at which they had been recognised in the acquired entities’ balance sheets. - If it is attributable to specific intangible assets, by recognising it explicitly in the consolidated balance sheet provided that the fair value of these assets within twelve months following the date of acquisition can be measured reliably. - The remaining amount is recognised as goodwill, which is allocated to one or more cash-generating units (a cash-generating unit is the smallest identifiable group of assets that, as a result of continuing operation, generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets). The cash-generating units represent the Group’s geographical and/or business segments. Goodwill (only recognised when it has been acquired by consideration) represents, therefore, a payment made by the acquirer in anticipation of future economic benefits from assets of the acquired entity that are not capable of being individually identified and separately recognised. At the end of each annual reporting period or whenever there is any indication of impairment goodwill is reviewed for impairment (i.e. a reduction in its recoverable amount to below its carrying amount) and, if there is any impairment, the goodwill is written down with a charge to Impairment or reversal of impairment on non-financial assets, net - Intangible assets in the consolidated income statement. An impairment loss recognised for goodwill is not reversed in a subsequent period. ii. Other intangible assets includes the amount of identifiable intangible assets (such as purchased customer lists and computer software). Other intangible assets can have an indefinite useful life -when, based on an analysis of all the relevant factors, it is concluded that there is no foreseeable limit to the period over which the asset is expected to generate net cash inflows for the consolidated entities- or a finite useful life, in all other cases. Intangible assets with indefinite useful lives are not amortised, but rather at the end of each reporting period or whenever there is any indication of impairment the consolidated entities review the remaining useful lives of the assets in order to determine whether they continue to be indefinite and, if this is not the case, to take the appropriate steps. Intangible assets with finite useful lives are amortised over those useful lives using methods similar to those used to depreciate tangible assets. The intangible asset amortisation charge is recognised under Depreciation and amortisation in the consolidated income statement. In both cases the consolidated entities recognise any impairment loss on the carrying amount of these assets with a charge to Impairment or reversal of impairment on non-financial assets, net - Intangible assets in the consolidated income statement. The criteria used to recognise the impairment losses on these assets and, where applicable, the reversal of impairment losses recognised in prior years are similar to those used for tangible assets (See Note 2.k). Internally developed computer software Internally developed computer software is recognised as an intangible asset if, among other requisites (basically the Group’s ability to use or sell it), it can be identified and its ability to generate future economic benefits can be demonstrated. Expenditure on research activities is recognised as an expense in the year in which it is incurred and cannot be subsequently capitalised.
Other assets	n) Other assets in the consolidated balance sheet includes the amount of assets not recorded in other items, the breakdown being as follows: - Inventories: this item includes the amount of assets, other than financial instruments, that are held for sale in the ordinary course of business, that are in the process of production, construction or development for such purpose, or that are to be consumed in the production process or in the provision of services. Inventories include land and other property held for sale in the property development business. Inventories are measured at the lower of cost and net realisable value, which is the estimated selling price of the inventories in the ordinary course of business, less the estimated costs of completion and the estimated costs required to make the sale. Any write-downs of inventories -such as those due to damage, obsolescence or reduction of selling price- to net realisable value and other impairment losses are recognised as expenses for the year in which the impairment or loss occurs. Subsequent reversals are recognised in the consolidated income statement for the year in which they occur. The carrying amount of inventories is derecognised and recognised as an expense in the period in which the revenue from their sale is recognised. - Other: this item includes the balance of all prepayments and accrued income (excluding accrued interest, fees and commissions), the net amount of the difference between pension plan obligations and the value of the plan assets with a balance in the entity’s favour, when this net amount is to be reported in the consolidated balance sheet, and the amount of any other assets not included in other items.
Other liabilities	o) Other liabilities includes the balance of all accrued expenses and deferred income, excluding accrued interest, and the amount of any other liabilities not included in other categories.
Provisions and contingent assets and liabilities	p) When preparing the financial statements of the consolidated entities, the Bank’s directors made a distinction between: - Provisions: credit balances covering present obligations at the reporting date arising from past events which could give rise to a loss for the consolidated entities, which is considered to be likely to occur and certain as to its nature but uncertain as to its amount and/or timing. - Contingent liabilities: possible obligations that arise from past events and whose existence will be confirmed only by the occurrence or non-occurrence of one or more future events not wholly within the control of the consolidated entities. They include the present obligations of the consolidated entities when it is not probable that an outflow of resources embodying economic benefits will be required to settle them. The Group does not recognise the contingent liability. The Group will disclose a contingent liability, unless the possibility of an outflow of resources embodying economic benefits is remote. - Contingent assets: possible assets that arise from past events and whose existence is conditional on, and will be confirmed only by, the occurrence or non-occurrence of one or more uncertain future events not wholly within the control of the Group. Contingent assets are not recognised in the consolidated balance sheet or in the consolidated income statement, but rather are disclosed in the notes, provided that it is probable that these assets will give rise to an increase in resources embodying economic benefits. The Group’s consolidated financial statements include all the material provisions with respect to which it is considered that it is more likely than not the obligation will have to be settled. In accordance with accounting standards, contingent liabilities must not be recognised in the consolidated financial statements, but must rather be disclosed in the notes. Provisions, which are quantified on the basis of the best information available on the consequences of the event giving rise to them and are reviewed and adjusted at the end of each year, are used to cater for the specific obligations for which they were originally recognised. Provisions are fully or partially reversed when such obligations cease to exist or are reduced. Provisions are classified according to the obligations covered as follows (See Note 25): - Provision for pensions and similar obligations: includes the amount of all the provisions made to cover post-employment benefits, including obligations to pre-retirees and similar obligations. - Provisions for contingent liabilities and commitments: include the amount of the provisions made to cover contingent liabilities -defined as those transactions in which the Group guarantees the obligations of a third party, arising as a result of financial guarantees granted or contracts of another kind- and contingent commitments -defined as irrevocable commitments that may give rise to the recognition of financial assets. - Provisions for taxes and other legal contingencies and Other provisions: include the amount of the provisions recognised to cover tax and legal contingencies and litigation and the other provisions recognised by the consolidated entities. Other provisions includes, inter alia, any provisions for restructuring costs and environmental measures.
Court proceedings and/or claims in process	q) At the end of 2018 certain court proceedings and claims were in process against the consolidated entities arising from the ordinary course of their operations (see Note 25).
Own equity instruments	r) Own equity instruments are those meeting both of the following conditions: - The instruments do not include any contractual obligation for the issuer: (i) to deliver cash or another financial asset to a third party; or (ii) to exchange financial assets or financial liabilities with a third party under conditions that are potentially unfavourable to the issuer. - The instruments will or may be settled in the issuer’s own equity instruments and are: (i) a non-derivative that includes no contractual obligation for the issuer to deliver a variable number of its own equity instruments; or (ii) a derivative that will be settled by the issuer through the exchange of a fixed amount of cash or another financial asset for a fixed number of its own equity instruments. Transactions involving own equity instruments, including their issuance and cancellation, are charged directly to equity. Changes in the value of instruments classified as own equity instruments are not recognised in the consolidated financial statements. Consideration received or paid in exchange for such instruments, including the coupons on preference shares contingently convertible into ordinary shares and the coupons associated with CCPP, is directly added to or deducted from equity.
Equity-instrument-based employee remuneration	s) Own equity instruments delivered to employees in consideration for their services, if the instruments are delivered once the specific period of service has ended, are recognised as an expense for services (with the corresponding increase in equity) as the services are rendered by employees during the service period. At the grant date the services received (and the related increase in equity) are measured at the fair value of the equity instruments granted. If the equity instruments granted are vested immediately, the Group recognises in full, at the grant date, the expense for the services received. When the requirements stipulated in the remuneration agreement include external market conditions (such as equity instruments reaching a certain quoted price), the amount ultimately to be recognised in equity will depend on the other conditions being met by the employees (normally length of service requirements), irrespective of whether the market conditions are satisfied. If the conditions of the agreement are met but the external market conditions are not satisfied, the amounts previously recognised in equity are not reversed, even if the employees do not exercise their right to receive the equity instruments.
Recognition of income and expenses	t) The most significant criteria used by the Group to recognise its income and expenses are summarised as follows: i. Interest income, interest expenses and similar items are generally recognised on an accrual basis using the effective interest method. Dividends received from other companies are recognised as income when the consolidated entities’ right to receive them arises. ii. Fee and commission income and expenses are recognised in the consolidated income statement using criteria that vary according to their nature. The main criteria are as follows: - Fee and commission income and expenses relating to financial assets and financial liabilities measured at fair value through profit or loss are recognised when paid. - Those arising from transactions or services that are performed over a period of time are recognised over the life of these transactions or services. - Those relating to services provided in a single act are recognised when the single act is carried out. iii. They are recognised for accounting purposes when the good is delivered or the non-financial service is rendered. To determine the amount and timing of recognition, a five-step model is followed: identification of the contract with the customer, identification of the separate obligations of the contract, determination of the transaction price, distribution of the transaction price among the identified obligations and finally recording of income as the obligations are satisfied. iv. These are recognised for accounting purposes at the amount resulting from discounting the expected cash flows at market rates. v. Loan arrangement fees, mainly loan origination, application and information fees, are accrued and recognised in income over the term of the loan.
Financial guarantees	u) Financial guarantees are defined as contracts whereby an entity undertakes to make specific payments on behalf of a third party if the latter fails to do so, irrespective of the various legal forms they may have, such as guarantees, insurance policies or credit derivatives. The Group initially recognises the financial guarantees provided on the liability side of the consolidated balance sheet at fair value, which is generally the present value of the fees, commissions and interest receivable from these contracts over the term thereof, and simultaneously the Group recognises the amount of the fees, commissions and similar interest received at the inception of the transactions and a credit on the asset side of the consolidated balance sheet for the present value of the fees, commissions and interest outstanding. Financial guarantees, regardless of the guarantor, instrumentation or other circumstances, are reviewed periodically so as to determine the credit risk to which they are exposed and, if appropriate, to consider whether a provision is required. The credit risk is determined by application of criteria similar to those established for quantifying impairment losses on debt instruments carried at amortised cost (described in Note 2.g above). The provisions made for these transactions are recognised under Provisions - Provisions for commitments and guarantees given in the consolidated balance sheet (See Note 25). These provisions are recognised and reversed with a charge or credit, respectively, to Provisions or reversal of provisions, net, in the consolidated income statement. If a specific provision is required for financial guarantees, the related unearned commissions recognised under Financial liabilities at amortised cost - Other financial liabilities in the consolidated balance sheet are reclassified to the appropriate provision.
Assets under management and investment and pension funds managed by the Group	v) Assets owned by third parties and managed by the consolidated entities are not presented on the face of the consolidated balance sheet. Management fees are included in Fee and commission income in the consolidated income statement. The investment funds and pension funds managed by the consolidated entities are not presented on the face of the Group’s consolidated balance sheet since the related assets are owned by third parties. The fees and commissions earned in the year for the services rendered by the Group entities to these funds (asset management and custody services) are recognised under Fee and commission income in the consolidated income statement. Note 2.b.iv describes the internal criteria and procedures used to determine whether control exists over the structured entities, which include, inter alia, investment funds and pension funds.
Post-employment, other long-term employee, and termination benefits	w) Under the collective agreements currently in force and other arrangements, the Spanish banks included in the Group and certain other Spanish and foreign consolidated entities have undertaken to supplement the public social security system benefits accruing to certain employees, and to their beneficiary right holders, for retirement, permanent disability or death, and the post-employment welfare benefits. The Group's post-employment obligations to its employees are deemed to be defined contribution plans when the Group makes pre-determined contributions (recognised under Personnel expenses in the consolidated income statement) to a separate entity and will have no legal or effective obligation to make further contributions if the separate entity cannot pay the employee benefits relating to the service rendered in the current and prior periods. Post-employment obligations that do not meet the aforementioned conditions are classified as defined benefit plans (See Note 25). Defined contribution plans The contributions made in this connection in each year are recognised under Personnel expenses in the consolidated income statement. The amounts not yet contributed at each year-end are recognised, at their present value, under Provisions - Provision for pensions and similar obligations on the liability side of the consolidated balance sheet. Defined benefit plans The Group recognises under Provisions - Provision for pensions and similar obligations on the liability side of the consolidated balance sheet (or under Other assets on the asset side, as appropriate) the present value of its defined benefit post-employment obligations, net of the fair value of the plan assets. Plan assets are defined as those that will be directly used to settle obligations and that meet the following conditions: - They are not owned by the consolidated entities, but by a legally separate third party that is not a party related to the Group. - They are only available to pay or fund post-employment benefits and they cannot be returned to the consolidated entities unless the assets remaining in the plan are sufficient to meet all the benefit obligations of the plan and of the entity to current and former employees, or they are returned to reimburse employee benefits already paid by the Group. If the Group can look to an insurer to pay part or all of the expenditure required to settle a defined benefit obligation, and it is practically certain that said insurer will reimburse some or all of the expenditure required to settle that obligation, but the insurance policy does not qualify as a plan asset, the Group recognises its right to reimbursement -which, in all other respects, is treated as a plan asset- under Insurance contracts linked to pensions on the asset side of the consolidated balance sheet. Post-employment benefits are recognised as follows: - Current service cost, (the increase in the present value of the obligations resulting from employee service in the current period), is recognised under Personnel expenses. - The past service cost, which arises from changes to existing post-employment benefits or from the introduction of new benefits and includes the cost of reductions, is recognised under Provisions or reversal of provisions. - Any gain or loss arising from a liquidation of the plan is included in the Provisions or reversion of provisions. - Net interest on the net defined benefit liability (asset), i.e. the change during the period in the net defined benefit liability (asset) that arises from the passage of time, is recognised under Interest expense and similar charges (Interest and similar income if it constitutes income) in the consolidated income statement. The remeasurement of the net defined benefit liability (asset) is recognised in Other comprehensive income under Items not reclassified to profit or loss and includes: - Actuarial gains and losses generated in the year, arising from the differences between the previous actuarial assumptions and what has actually occurred and from the effects of changes in actuarial assumptions. - The return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset). - Any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). x) Other long-term employee benefits, defined as obligations to pre-retirees -taken to be those who have ceased to render services at the entity but who, without being legally retired, continue to have economic rights vis-à-vis the entity until they acquire the legal status of retiree-, long-service bonuses, obligations for death of spouse or disability before retirement that depend on the employee’s length of service at the entity and other similar items, are treated for accounting purposes, where applicable, as established above for defined benefit post-employment plans, except that actuarial gains and losses are recognised under Provisions or reversal of provisions, net, in the consolidated income statement (see Note 25). y) Termination benefits are recognised when there is a detailed formal plan identifying the basic changes to be made, provided that implementation of the plan has begun, its main features have been publicly announced or objective facts concerning its implementation have been disclosed.
Income tax	z) The expense for Spanish income tax and other similar taxes applicable to the foreign consolidated entities is recognised in the consolidated income statement, except when it results from a transaction recognised directly in equity, in which case the tax effect is also recognised in equity. The current income tax expense is calculated as the sum of the current tax resulting from application of the appropriate tax rate to the taxable profit for the year (net of any deductions allowable for tax purposes), and of the changes in deferred tax assets and liabilities recognised in the consolidated income statement. Deferred tax assets and liabilities include temporary differences, which are identified as the amounts expected to be payable or recoverable on differences between the carrying amounts of assets and liabilities and their related tax bases, and tax loss and tax credit carryforwards. These amounts are measured at the tax rates that are expected to apply in the period when the asset is realised or the liability is settled. Tax assets includes the amount of all tax assets, which are broken down into current -amounts of tax to be recovered within the next twelve months- and deferred -amounts of tax to be recovered in future years, including those arising from tax loss or tax credit carryforwards. Tax liabilities includes the amount of all tax liabilities (except provisions for taxes), which are broken down into current -the amount payable in respect of the income tax on the taxable profit for the year and other taxes in the next twelve months- and deferred -the amount of income tax payable in future years. Deferred tax liabilities are recognised in respect of taxable temporary differences associated with investments in subsidiaries, associates or joint ventures, except when the Group is able to control the timing of the reversal of the temporary difference and, in addition, it is probable that the temporary difference will not reverse in the foreseeable future. Deferred tax assets are only recognised for temporary differences to the extent that it is considered probable that the consolidated entities will have sufficient future taxable profits against which the deferred tax assets can be utilised, and the deferred tax assets do not arise from the initial recognition (except in a business combination) of other assets and liabilities in a transaction that affects neither taxable profit nor accounting profit. Other deferred tax assets (tax loss and tax credit carryforwards) are only recognised if it is considered probable that the consolidated entities will have sufficient future taxable profits against which they can be utilised. Income and expenses recognised directly in equity are accounted for as temporary differences. The deferred tax assets and liabilities are reassessed at the reporting date in order to ascertain whether any adjustments need to be made on the basis of the findings of the analyses performed.
Residual maturity periods and average interest rates	aa) The analysis of the maturities of the balances of certain items in the consolidated balance sheet and the average interest rates at the end of the reporting periods is provided in Note 51.
Consolidated statements of recognized income and expense	ab) This statement presents the income and expenses generated by the Group as a result of its business activity in the year, and a distinction is made between the income and expenses recognised in the consolidated income statement for the year and the other income and expenses recognised directly in consolidated equity. Accordingly, this statement presents: a. Consolidated profit for the year. b. The net amount of the income and expenses recognised in Other comprehensive income under items that will not be reclassified to profit or loss. c. The net amount of the income and expenses recognised in Other comprehensive income under items that may be reclassified subsequently to profit or loss. d. The income tax incurred in respect of the items indicated in b) and c) above, except for the valuation adjustments arising from investments in associates or joint ventures accounted for using the equity method, which are presented net. e. Total consolidated recognised income and expense, calculated as the sum of a) to d) above, presenting separately the amount attributable to the parent company and the amount relating to non-controlling interests. The statement presents the items separately by nature, grouping together items that, in accordance with the applicable accounting standards, will not be reclassified subsequently to profit and loss since the requirements established by the corresponding accounting standards are met.
Statements of changes in total equity	ac) This statement presents all the changes in equity, including those arising from changes in accounting policies and from the correction of errors. Accordingly, this statement presents a reconciliation of the carrying amount at the beginning and end of the year of all the consolidated equity items, and the changes are grouped together on the basis of their nature into the following items: a. Adjustments due to changes in accounting policies and to errors: include the changes in consolidated equity arising as a result of the retrospective restatement of the balances in the consolidated financial statements, distinguishing between those resulting from changes in accounting policies and those relating to the correction of errors. b. Income and expense recognised in the year: includes, in aggregate form, the total of the aforementioned items recognised in the consolidated statement of recognised income and expense. c. Other changes in equity: includes the remaining items recognised in equity, including, inter alia, increases and decreases in capital, distribution of profit, transactions involving own equity instruments, equity-instrument-based payments, transfers between equity items and any other increases or decreases in consolidated equity.
Consolidated statements of cash flows	ad) The following terms are used in the consolidated statements of cash flows with the meanings specified: - Cash flows: inflows and outflows of cash and cash equivalents, which are short-term, highly liquid investments that are subject to an insignificant risk of changes in value, irrespective of the portfolio in which they are classified. The Group classifies as cash and cash equivalents the balances recognised under Cash, cash balances at central banks and other deposits on demand in the consolidated balance sheet. - Operating activities: the principal revenue-producing activities of credit institutions and other activities that are not investing or financing activities. - Investing activities: the acquisition and disposal of long-term assets and other investments not included in cash and cash equivalents. - Financing activities: activities that result in changes in the size and composition of the equity and liabilities that are not operating activities. During 2018 the Group received interest amounting to EUR 50,685 million and paid interest amounting to EUR 19,927 million. Also, dividends received and paid by the Group are detailed in Notes 4, 28 and 40, including dividends paid to minority interests (non-controlling interests).

Introduction, basis of presen_2

Introduction, basis of presentation of the Consolidated Financial Statements and other information (Tables)	12 Months Ended
	Dec. 31, 2018
Intro, basis of presentation of the consolidated financial statements and other information
Schedule of Reclassified Financial Instruments	IAS39 IFRS9 Book value Book value Balance Portfolio (Million of euros) Portfolio (Million of euros) Equity instruments Financial assets available for sale 2,154 Non-trading financial assets mandatorily at fair value through profit or loss 1,651 (including those that were valued at cost at December) Financial assets at fair value through other comprehensive income 533 Loans and receivables 1,537 Non-trading financial assets mandatorily at fair value through profit or loss 1,497 457 Financial assets at fair value through other comprehensive income 486 96 Non-trading financial assets mandatorily at fair value through profit or loss 96 Debt instruments Financial assets available for sale 6,589 Financial assets at amortised cost 6,704 203 Financial assets held for trading 203 Financial assets at fair value through profit or loss 199 Non-trading financial assets mandatorily at fair value through profit or loss 199 Investments held-to-maturity 13,491 Financial assets at amortised cost 13,491 Loans and receivables 10,179 Non-trading financial assets mandatorily at fair value through profit or loss 611 Financial assets at fair value through profit or loss 9,577 Loans and advances Loans and receivables 1,069 Financial assets at fair value through other comprehensive income 1,107 Financial assets held for trading 43 Financial assets at fair value through profit or loss 1,152 Financial assets at amortised cost 1,102 Derivatives Derivatives – hedging accounting (liabilities) 10 Derivatives - financial liabilities held for trading 10
Schedule of Impact on Impairment Provisions	Million of euros IAS39 IFRS9 12-31-2017 Impairment impact 01-01-2018 Financial assets at amortised cost 24,682 1,974 26,656 Loans and advances 23,952 2,002 25,954 Debt instruments 730 (28) 702 Financial assets at fair value through other comprehensive income — 2 2 Debt instruments — 2 2 Commitments and guarantees granted 617 197 814 Total 25,299 2,173 27,472
Disclosure of financial assets at date of initial application of IFRS 9 [text block]	IAS39 Classification and Impairment IFRS9 ASSETS (Million of euros) 12-31-2017 Naming modifications (*) measurement impact impact 01-01-2018 Cash, cash balances at central banks and other deposits on demand 110,995 — — — 110,995 Financial assets held for trading 125,458 — 160 — 125,618 Derivatives 57,243 — — — 57,243 Equity instruments 21,353 — — — 21,353 Debt instruments 36,351 — 203 — 36,554 Loans and advances 10,511 — (43) — 10,468 Non-trading financial assets mandatorily at fair value through profit or loss — 933 4,054 (c) — 4,987 Equity instruments — 933 1,651 — 2,584 Debt instruments — — 1,792 — 1,792 Loans and advances — — 611 — 611 Financial assets designated at fair value through profit or loss 34,782 (933) 8,226 — 42,075 Equity instruments 933 (933) — — — Debt instruments 3,485 — (199) — 3,286 Loans and advances 30,364 — 8,425 (a) — 38,789 Financial assets at fair value through other comprehensive income — 124,229 2,126 (2) 126,353 Equity instruments — 2,636 533 — 3,169 Debt instruments — 121,593 486 (2) 122,077 Loans and advances — — 1,107 — 1,107 Financial assets available-for-sale 133,271 (124,229) (9,042) — — Equity instruments 4,790 (2,636) (2,154) (c) — — Debt instruments 128,481 (121,593) (6,888) (b) — — Financial assets at amortised cost — 889,779 (a) 21,297 (1,982) (d) 909,094 Debt instruments — 15,557 (b) 20,195 (b) 20 35,772 Loans and advances — 874,222 1,102 (2,002) 873,322 Loans and receivables 903,013 (889,779) (a) (13,242) 8 — Debt instruments 17,543 (15,557) (1,994) (c) 8 — Loans and advances 885,470 (874,222) (11,248) (a,c) — — Investments held to maturity 13,491 — (13,491) (b) — — Investments 6,184 — — (34) 6,150 Other assets (**) 117,111 — 6 680 (e) 117,797 TOTAL ASSETS 1,444,305 — 94 (1,330) 1,443,069 (*) Due to the entry into force of Bank of Spain Circular 4/2017. (**) Includes Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Assets under insurance or reinsurance contracts, Tangible assets, Intangible assets, Tax assets, Other assets and Non-current assets held for sale. a) The amount of the item Loans and receivables at December 31, 2017 is reclassified into Financial assets at amortised cost. Nevertheless, the Group maintained a portfolio of loans and receivables for an approximate amount of EUR 8,600 million, which relate mainly to Brazil, which was designated at amortised cost; as a result of the initial implementation of IFRS9 this portfolio has been designated as fair value and finally it has been reclassified as ‘Financial assets designated at fair value through profit or loss’. b) Instruments classified as Investments held to maturity at December 31, 2017 have been reclassified into Financial assets available-for-sale because of the initial implementation of IFRS9. Additionally, after the review of the business model of cash flow portfolio in different locations, the group has identified certain groups of assets classified at December 31, 2017 as Financial assets available-for-sale, which relate mainly to Mexico, Brazil and Consumer Finance business, whose management is oriented towards the maintenance of financial instruments in a portfolio until maturity end; because of that, this asset group has been reclassified as Financial assets at amortised cost. c) The Group has reclassified in Non-trading financial assets mandatory at fair value through profit or loss those financial instruments which have not comply with the SPPI test (solely payments of principal and interest) classified at December 31, 2017 mainly in Loans and receivables and Financial assets available for sale, which relate mainly to the UK, Spain and Poland. d) It corresponds to the increase in provisions for impairment of the value of the assets included in the item Financial assets at amortised cost derived from the change in accounting policy. e) This corresponds with increase on provisions for the tax effect referred in section d.
Disclosure of financial liabilities at date of initial application of IFRS 9 [text block]	IAS39 Classification and Impairment IFRS9 LIABILITIES (Million of euros) 12-31-2017 Naming modifications measurement impact impact 01-01-2018 Financial liabilities held for trading 107,624 — 10 — 107,634 Derivatives 57,892 — 10 — 57,902 Short positions 20,979 — — — 20,979 Deposits 28,753 — — — 28,753 Marketable debt securities — — — — — Other financial liabilities — — — — — Financial liabilities designated at fair value through profit or loss 59,616 — — — 59,616 Deposits 55,971 — — — 55,971 Marketable debt securities 3,056 — — — 3,056 Other financial liabilities 589 — — — 589 Financial liabilities at amortised cost 1,126,069 — — — 1,126,069 Deposits 883,320 — — — 883,320 Marketable debt securities 214,910 — — — 214,910 Other financial liabilities 27,839 — — — 27,839 Hedging derivatives 8,044 — (10) — 8,034 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 330 — — — 330 Provisions 14,489 — — 197 14,686 Contingent liabilities and commitments 617 — — 197 814 Other provisions (*) 13,872 — — — 13,872 Other liabilities (**) 21,300 — 41 (3) 21,338 TOTAL LIABILITIES 1,337,472 — 41 194 1,337,707 (*) Includes Pensions and other post-retirements obligations, Other long-term employee benefits, Taxes and other legal contingencies and Other provisions (including guarantees and other contingent liabilities). (**) Includes Liabilities under insurance or reinsurance contracts, Tax liabilities, Other liabilities and Liabilities associated with non-current assets held for sale. IAS39 Classification and Impairment IFRS9 EQUITY (Million of euros) 12-31-2017 Naming modifications (*) measurement impact impact 01-01-2018 Shareholders’ equity 116,265 — 91 (1,401) 114,955 Capital 8,068 — — — 8,068 Share premium 51,053 — — — 51,053 Equity instruments issued other than capital 525 — — — 525 Other equity 216 — — — 216 Accumulated retained earnings 53,437 — — — 53,437 Revaluation reserves — — — — — Other reserves (1,602) — 91 (1,401) (2,912) Own shares (22) — — — (22) Profit attributable to shareholders of the parent 6,619 — — — 6,619 Interim dividends (2,029) — — — (2,029) Other comprehensive income (21,776) — (53) — (21,829) Items not reclassified to profit or loss (4,034) 919 (152) — (3,267) Actuarial gains or losses on defined benefit pension plans (4,033) — — — (4,033) Non-current assets held for sale — — — — — Share in other income and expenses recognised in investments in joint ventures and associates (1) 5 (5) — (1) Other valuation adjustments — — — — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income — 914 (141) — 773 Inefficacy of fair value hedges of equity instruments measured at fair value with changes in other comprehensive income — — — — — Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk — — (6) — (6) Items that may be reclassified to profit or loss (17,742) (919) 99 — (18,562) Hedge of net investment in foreign operations (effective portion) (4,311) — — — (4,311) Exchange differences (15,430) — — — (15,430) Hedging derivatives. Cash flow hedges (effective portion) 152 — — — 152 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income — 1,154 99 — 1,253 Hedging instruments (items not designated) — — — — — Financial assets available for sale 2,068 (2,068) — — — Debt instruments 1,154 (1,154) — — — Equity instruments 914 (914) — — — Non-current assets held for sale — — — — — Share in other income and expenses recognised in investments in joint ventures and associates (221) (5) — — (226) Non controlling interests 12,344 — 15 (123) 12,236 Other comprehensive income (1,436) — 3 — (1,433) Other elements 13,780 — 12 (123) 13,669 EQUITY 106,833 — 53 (1,524) 105,362 TOTAL EQUITY AND LIABILITIES 1,444,305 — 94 (1,330) 1,443,069 (*) Due to the entry into force of Bank of Spain Circular 4/2017.

Accounting policies (Tables)

Accounting policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting policies
Schedule of estimated effect on the consolidated equity attributable to the Group and on consolidated profit of a 1% change in the euro against the corresponding currency	The estimated effect on the consolidated equity attributable to the Group and on consolidated profit of a 1% appreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar (162.3) (157.9) (187.1) (4.1) (1.4) (4.5) Chilean peso (22.9) (29.0) (27.9) (5.1) (1.8) (4.2) Pound sterling (171.2) (176.6) (184.9) (4.5) (3.1) (10.0) Mexican peso (18.3) (16.0) (16.2) (1.7) (1.2) (5.4) Brazilian real (85.6) (93.1) (122.3) (5.6) (6.5) (6.3) Polish zloty (36.2) (34.5) (31.5) (4.2) (1.5) (3.3) Argentine peso (7.8) (7.4) (9.0) (0.6) (3.5) (3.3) Similarly, the estimated effect on the Group’s consolidated equity and on consolidated profit of a 1% depreciation of the euro against the corresponding currency is as follows: Million of euros Effect on consolidated equity Effect on consolidated profit Currency 2018 2017 2016 2018 2017 2016 US dollar 165.6 161.1 190.8 4.2 1.5 4.5 Chilean peso 23.4 29.6 28.4 5.2 1.8 4.3 Pound sterling 174.7 180.2 188.7 4.6 3.2 10.2 Mexican peso 18.6 16.3 16.5 1.8 1.2 5.5 Brazilian real 87.4 95.0 124.7 5.7 6.6 6.5 Polish zloty 36.9 35.2 32.1 4.2 1.5 3.3 Argentine peso 8.0 7.6 9.2 0.6 3.6 3.3
Summary of fair values of financial assets and liabilities	Million of euros 2018 (*) 2017 2016 Published Published Published price price price quotations Internal quotations Internal quotations Internal in active models in active Models in active models markets (Level 2 markets (Level 2 markets (Level 2 (Level 1) and 3) Total (Level 1) and 3) Total (Level 1) and 3) Total Financial assets held for trading 37,108 55,771 92,879 58,215 67,243 125,458 64,259 83,928 148,187 Non-trading financial assets mandatorily at fair value through profit or loss 1,835 8,895 10,730 — — — — — — Financial assets designated at fair value through profit or loss 3,102 54,358 57,460 3,823 30,959 34,782 3,220 28,389 31,609 Financial assets at fair value through other comprehensive income 103,590 17,501 121,091 — — — — — — Financial assets available-for-sale (**) — — — 113,258 18,802 132,060 89,563 25,862 115,425 Hedging derivatives (assets) — 8,607 8,607 — 8,537 8,537 216 10,161 10,377 Financial liabilities held for trading 16,104 54,239 70,343 21,828 85,796 107,624 20,906 87,859 108,765 Financial liabilities designated at fair value through profit or loss 987 67,071 68,058 769 58,847 59,616 — 40,263 40,263 Hedging derivatives (liabilities) 5 6,358 6,363 8 8,036 8,044 9 8,147 8,156 Liabilities under insurance contracts — 765 765 — 1,117 1,117 — 652 652 (*) See further detail regarding the impacts of the entry into force of IFRS9 as of January 1, 2018 (Note 1.b). (**) In addition to the financial instruments measured at fair value shown in the foregoing table, at December 31, 2017 and 2016, the Group held equity instruments classified as Financial assets available-for-sale and carried at cost amounting to EUR 1,211 million and EUR 1,349 million, respectively (see Note 51.c).
Schedule of financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3)	Million of euros Fair values calculated using internal models at 12/31/18 (**) (*) Level 2 Level 3 Valuation techniques Main assumptions ASSETS: 140,659 4,473 Financial assets held for trading 55,033 738 Credit institutions — — Present value method Yield curves, FX market prices Customers (***) 205 — Present value method Yield curves, FX market prices Debt and equity instruments 314 153 Present value method Yield curves, HPI, FX market prices Derivatives 54,514 585 Swaps 44,423 185 Present value method, Gaussian Copula (****) Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 617 2 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 3,778 149 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures — — Present value method Yield curves, FX market prices Index and securities options 1,118 198 Black-Scholes Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 4,578 51 Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX and EQ market prices, Dividends, Correlation, Liquidity, Others Hedging derivatives 8,586 21 Swaps 7,704 21 Present value method FX market prices, Yield curves, Basis Interest rate options 20 — Black's Model FX market prices, Yield curves, Volatility surfaces Other 862 — Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity, Others Non-trading financial assets mandatorily at fair value through profit or loss 7,492 1,403 Equity instruments 985 462 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 5,085 481 Present value method Interest rates curves Loans and receivables (***) 1,422 460 Present value method, swap asset model & CDS Interest rates curves and Credit curves Financial assets designated at fair value through profit or loss 53,482 876 Central banks 9,226 — Present value method Interest rates curves, FX market prices Credit institutions 22,897 201 Present value method Interest rates curves, FX market prices Customers 21,355 560 Present value method Interest rates curves, FX market prices, HPI Debt instruments 4 115 Present value method Interest rates curves, FX market prices Financial assets at fair value through other comprehensive income 16,066 1,435 Equity instruments 455 581 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 14,699 165 Present value method Interest rates curves, FX market prices Loans and receivables 912 689 Present value method Interest rates curves, FX market prices and Credit curves Financial assets available for sale — — Debt instruments — — LIABILITIES 127,991 442 Financial liabilities held for trading 53,950 289 Central banks — — Present value method Yield curves, FX market prices Credit institutions — — Present value method Yield curves, FX market prices Customers — — Present value method Yield curves, FX market prices Derivatives 53,950 289 Swaps 43,489 111 Present value method, Gaussian Copula (****) Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 610 7 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 4,411 26 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Index and securities options 1,233 143 Black-Scholes Model Yield curves, FX market prices Interest rate and equity futures 7 — Black's Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 4,200 2 Present value method, Advanced stochastic volatility models and other Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Short positions — — Present value method Yield curves ,FX & EQ market prices, Equity Hedging derivatives 6,352 6 Swaps 5,868 6 Present value method Yield curves ,FX & EQ market prices, Basis Interest rate options 158 — Black's Model Yield curves , Volatility surfaces, FX market prices, Liquidity Other 326 — Present value method, Advanced stochastic volatility models and other Yield curves , Volatility surfaces, FX market prices, Liquidity, Other Financial liabilities designated at fair value through profit or loss 66,924 147 Present value method Yield curves, FX market prices Liabilities under insurance contracts 765 — Million of euros Fair values calculated using internal models at 12/31/17 (**) 12/31/16 (**) Level 2 Level 3 Level 2 Level 3 Valuation techniques ASSETS: 124,178 1,363 146,991 1,349 Financial assets held for trading 66,806 437 83,587 341 Credit institutions 1,696 — 3,220 — Present value method Customers (***) 8,815 — 9,504 — Present value method Debt and equity instruments 335 32 798 40 Present value method Derivatives 55,960 405 70,065 301 Swaps 44,766 189 53,499 55 Present value method, Gaussian Copula (****) Exchange rate options 463 5 524 2 Black-Scholes Model Interest rate options 4,747 162 5,349 173 Black's Model, Heath-Jarrow- Morton Model Interest rate futures 2 — 1,447 — Present value method Index and securities options 1,257 5 1,725 26 Black-Scholes Model Other 4,725 44 7,521 45 Present value method, Monte Carlo simulation and others Hedging derivatives 8,519 18 10,134 27 Swaps 7,896 18 9,737 27 Present value method Interest rate options 13 — 13 — Black’s Model Other 610 — 384 — N/A Financial assets designated at fair value through profit or loss 30,677 282 28,064 325 Credit institutions 9,889 — 10,069 — Present value method Customers (*****) 20,403 72 17,521 74 Present value method Debt and equity instruments 385 210 474 251 Present value method Financial assets available-for-sale 18,176 626 25,206 656 Debt and equity instruments 18,176 626 25,206 656 Present value method LIABILITIES: 153,600 196 136,835 86 Financial liabilities held for trading 85,614 182 87,790 69 Central banks 282 — 1,351 — Present value method Credit institutions 292 — 44 — Present value method Customers 28,179 — 9,996 — Present value method Derivatives 56,860 182 73,481 69 Swaps 45,041 100 57,103 1 Present value method, Gaussian Copula (****) Exchange rate options 497 9 413 — Black-Scholes Model Interest rate options 5,402 19 6,485 21 Black's Model, Heath-Jarrow- Morton Model Index and securities options 1,527 41 1,672 46 Black-Scholes Model Interest rate and equity futures 1 — 1,443 — Black's Model Other 4,392 13 6,365 1 Present value method, Monte Carlo simulation and others Short positions 1 — 2,918 — Present value method Hedging derivatives 8,029 7 8,138 9 Swaps 7,573 7 6,676 9 Present value method Interest rate options 287 — 10 — Black’s Model Other 169 — 1,452 — N/A Financial liabilities designated at fair value through profit or loss 58,840 7 40,255 8 Present value method Liabilities under insurance contracts 1,117 — 652 — See Note 15 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (See Note 1.b) (**) Level 2 internal models use data based on observable market parameters, while level 3 internal models use significant non-observable inputs in market data. (***) Includes mainly short-term loans and reverse repurchase agreements with corporate customers (mainly brokerage and investment companies). (****) Includes credit risk derivatives with a net fair value of EUR 0 million at December 31, 2018 (December 31, 2017 and 2016: net fair value of EUR 0 million and EUR-1 million, respectively). These assets and liabilities are measured using the Standard Gaussian Copula Model. (*****) Includes home mortgage loans to financial institutions in the UK (which are regulated and partly financed by the Government). The fair value of these loans was obtained using observable market variables, including current market transactions with similar amounts and collateral facilitated by the UK Housing Association. Since the Government is involved in these financial institutions, the credit risk spreads have remained stable and are homogeneous in this sector. The results arising from the valuation model are checked against current market transactions.
Schedule of effect on fair value of financial instruments classified as Level 3 of a reasonable change in the assumptions used in the valuation	Impacts (Million of euros) Portfolio/Instrument (*) Weighted Unfavourable Favorable (Level 3) Valuation technique Main unobservable inputs Range average scenario scenario Financial assets held for trading Trading derivatives Present value method Curves on TAB indices (**) (a) (a) (0.3) 0.3 Long-term rates MXN (a) (a) — — Present value method, Modified Black-Scholes Model HPI forward growth rate 0%‑5% (24.0) 20.7 HPI spot rate n/a (***) (7.8) 7.8 Interest Rate Curves, FX Market Prices CPR n/a n/a (163.2) (84.4) Long-term FX volatility 11%‑17% (34.4) 5.0 Financial assets at fair value through other comprehensive income Debt instruments and equity holdings Present value method, others Contingencies for litigation 0%‑100% (23.8) 9.7 Present value method, others Late payment and prepayment rate capital cost long-term profit growth rate — (a) — (a) (6.6) 6.6 Present value method, others Interest Rate Curves, FX Market Prices and Credit Curves — (a) — (a) 1.8 (1.8) Local Volatility Long term volatility n/a 244.9 (313.8) Non-trading financial assets mandatorily at fair value through profit or loss Credit to customers Weighted average by probability (according to forecast mortality rates) of European HPI options, using the Black-Scholes model HPI forward growth rate 0%-5% (6.2) 5.0 Debt instruments and equity instruments HPI spot rate n/a (***) (11.2) 11.2 TD Black Spain volatility n/a (11.5) Model Asset Swap & CDS Model - Interest Rate Curves and Credit n/a (19.8) 4.4 Cvx. Adj (SLN) Long term volatility n/a (121.2) 105.1 Financial liabilities held for trading Trading derivatives Present value method, modified Black-Scholes Model HPI forward growth rate 0%‑5% (5.4) 5.8 HPI spot rate n/a (***) (4.9) 4.8 Curves on TAB indices (**) (a) (a) — — Discounted flows denominated in different currencies Long-term rates MXN Bid Offer Spread IRS TIIE 3bp (1.2) 1.2 Hedging derivatives (liabilities) Advanced models of local and stochastic volatility Correlation between the price of shares 55%-75% n/a n/a Advanced multi-factor interest rate models Mean reversion of interest rates 0.0001-0.03 (****) — — Financial liabilities designated at fair value through profit or loss — — — — — (b) — (b) (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) TAB: “Tasa Activa Bancaria” (Active Bank Rate). Average interest rates on 30, 90, 180 and 360-day deposits published by the Chilean Association of Banks and Financial Institutions (ABIF) in nominal currency (Chilean peso) and in real terms, adjusted for inflation (in Chilean unit of account (Unidad de Fomento - UF)). (***) There are national and regional HPIs. The HPI spot value is the weighted average of the indices that correspond to the positions of each portfolio. The impact reported is in response to a 10% shift. (****) Theoretical average value of the parameter. The change made for the favourable scenario is from 0.0001 to 0.03. An unfavourable scenario was not considered as there was no margin for downward movement from the parameter’s current level. (a) The exercise was performed for the unobservable inputs described in the column "Main unobservable inputs" under probable scenarios. The weighted average range and value used is not shown because this exercise has been carried out jointly for different inputs or variants of them (for example, the TAB input are vector-term curves, for which there are also nominal and indexed curves to inflation), it is not possible to break down the result in an isolated manner by type of input. In the case of the TAB curve, the result is reported before movements of +/‑100 b.p. for the joint sensitivity of this index in CLP (Chilean peso) and UF. The same applies for interest rates in MXN (Mexican peso). (b) The Group calculates the potential impact on the measurement of each instrument on a joint basis, regardless of whether the individual value is positive (assets) or negative (liabilities), and discloses the joint effect associated with the related instruments classified on the asset side of the consolidated balance sheet.
Schedule of changes in financial instruments classified as Level 3	01-01-2018 (*) Changes 12/31/2018 Fair value Changes in fair Changes in Fair value calculated using value fair value calculated using internal models Purchases/ Sales/ recognized in recognized Level internal models Million of euros (Level 3) Settlements Amortization Settlements profit or loss in equity reclassifications Other (Level 3) Financial assets held for trading 437 85 (26) (34) (16) — 312 (20) 738 Debt instruments and equity instruments 32 22 (6) (34) 2 — 141 (4) 153 Trading derivatives 405 63 (20) — (18) — 171 (16) 585 Swaps 189 — (8) — 4 — 4 (4) 185 Exchange rate options 5 — — — (2) — — (1) 2 Interest rate options 162 — (3) — (16) — 8 (2) 149 Index and securities options 5 41 (1) — (35) — 195 (7) 198 Other 44 22 (8) — 31 — (36) (2) 51 Hedging derivatives (Assets) 18 — — — 3 — — — 21 Swaps 18 — — — 3 — — — 21 Financial assets at fair value through profit or loss — 105 — — 19 — 699 53 876 Credit entities — — — — (1) — 202 — 201 Loans and advances to customers — — — — 6 — 497 57 560 Debt instruments — 105 — — 14 — — (4) 115 Non-trading financial assets mandatorily at fair value through profit or loss 1,365 66 (30) (5) 12 — 31 (36) 1,403 Loans and advances to customers 465 56 (22) — 20 — — (59) 460 Debt instruments 518 — (7) — (29) — 1 (2) 481 Equity instruments 382 10 (1) (5) 21 — 30 25 462 Financial assets at fair value through other comprehensive income 1,726 162 (238) — — (269) 147 (93) 1,435 TOTAL ASSETS 3,546 418 (294) (39) 18 (269) 1,189 (96) 4,473 Financial liabilities held for trading 182 41 (95) — 9 — 161 (9) 289 Trading derivatives 182 41 (95) — 9 — 161 (9) 289 Swaps 100 — (7) — (7) — 28 (3) 111 Exchange rate options 9 — — — (2) — — — 7 Interest rate options 19 — (1) — (1) — 10 (1) 26 Index and securities options 41 41 (87) — 25 — 128 (5) 143 Others 13 — — — (6) — (5) — 2 Hedging derivatives (Liabilities) 7 — — — (1) — — — 6 Swaps 7 — — — (1) — — — 6 Financial liabilities designated at fair value through profit or loss 7 140 — — — — — — 147 TOTAL LIABILITIES 196 181 (95) — 8 — 161 (9) 442 (*) 2016 Changes 2017 Fair value Changes in fair Changes in Fair value calculated using value fair value calculated using internal models recognized in recognized Level internal models Million of euros (Level 3) Purchases Sales Issues Settlements profit or loss in equity reclassifications Other (Level 3) Financial assets held for trading 341 45 (21) — — (129) — 200 1 437 Debt and equity instruments 40 — (7) — — (1) — — — 32 Derivatives 301 45 (14) — — (128) — 200 1 405 Swaps 55 1 (6) — — (59) — 200 (2) 189 Exchange rate options 2 5 — — — (2) — — — 5 Interest rate options 173 — — — — (11) — — — 162 Index and securities options 26 — (1) — — (18) — — (2) 5 Other 45 39 (7) — — (38) — — 5 44 Hedging derivatives (Assets) 27 — (2) — — (7) — — — 18 Swaps 27 — (2) — — (7) — — — 18 Financial assets designated at fair value through profit or loss 325 — (9) — — (20) — — (14) 282 Loans and advances to customers 74 — (2) — — 3 — — (3) 72 Debt instruments 237 — (7) — — (21) — — (10) 199 Equity instruments 14 — — — — (2) — — (1) 11 Financial assets available-for-sale 656 1 (239) — (5) — 59 (6) 160 626 TOTAL ASSETS 1,349 46 (271) — (5) (156) 59 194 147 1,363 Financial liabilities held for trading 69 33 (3) — — (38) — 126 (5) 182 Derivatives 69 33 (3) — — (38) — 126 (5) 182 Swaps 1 — — — — (26) — 126 (1) 100 Exchange rate options — 21 — — — (11) — — (1) 9 Interest rate options 21 — — — — (2) — — — 19 Index and securities options 46 — (3) — — — — — (2) 41 Other 1 12 — — — 1 — — (1) 13 Hedging derivatives (Liabilities) 9 — — — — (2) — — — 7 Swaps 9 — — — — (2) — — — 7 Financial liabilities designated at fair value through profit or loss 8 — — — — — — — (1) 7 TOTAL LIABILITIES 86 33 (3) — — (40) — 126 (6) 196 2015 Changes 2016 Fair value Changes in fair Changes in Fair value calculated using value fair value calculated using internal models recognized in recognized Level internal models Million of euros (Level 3) Purchases Sales Issues Settlements profit or loss in equity reclassifications Other (Level 3) Financial assets held for trading 950 — (157) — — 52 — (489) (15) 341 Debt and equity instruments 43 — (5) — — 3 — — (1) 40 Derivatives 907 — (152) — — 49 — (489) (14) 301 Swaps 54 — — — — (3) — — 4 55 Exchange rate options — — — — — 2 — — — 2 Interest rate options 619 — (52) — — 39 — (433) — 173 Index and securities options 120 — (30) — — (3) — (56) (5) 26 Other 114 — (70) — — 14 — — (13) 45 Hedging derivatives (Assets) 18 — (4) — — 13 — — — 27 Swaps 18 — (4) — — 13 — — — 27 Financial assets designated at fair value through profit or loss 514 — (7) — (104) 6 — (2) (82) 325 Loans and advances to customers 81 — — — — 5 — — (12) 74 Debt instruments 283 — (7) — — 1 — — (40) 237 Equity instruments 150 — — — (104) — — (2) (30) 14 Financial assets available-for-sale 999 37 (263) — (28) — (11) (29) (49) 656 TOTAL ASSETS 2,481 37 (431) — (132) 71 (11) (520) (146) 1,349 Financial liabilities held for trading 302 — (34) — — 10 — (199) (10) 69 Derivatives 302 — (34) — — 10 — (199) (10) 69 Swaps 1 — — — — — — — — 1 Interest rate options 194 — (19) — — 1 — (155) — 21 Index and securities options 107 — (15) — — 8 — (44) (10) 46 Other — — — — — 1 — — — 1 Hedging derivatives (Liabilities) 11 — (3) — — 1 — — — 9 Swaps 11 — (3) — — 1 — — — 9 Financial liabilities designated at fair value through profit or loss 11 — — — — — — — (3) 8 TOTAL LIABILITIES 324 — (37) — — 11 — (199) (13) 86
Schedule of financial assets and liabilities offset in consolidated balance sheets	December 31, 2018 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 107,055 (42,509) 64,546 Reverse repurchase agreements 79,114 (4,031) 75,083 Total 186,169 (46,540) 139,629 December 31, 2017 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 103,740 (37,960) 65,780 Reverse repurchase agreements 56,701 (7,145) 49,556 Total 160,441 (45,105) 115,336 December 31, 2016 Million of euros Gross amount of financial Net amount of Gross amount liabilities offset financial assets of financial in the balance presented in the Assets assets sheet balance sheet Derivatives 127,679 (45,259) 82,420 Reverse repurchase agreements 53,159 (2,213) 50,946 Total 180,838 (47,472) 133,366 December 31, 2018 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 104,213 (42,509) 61,704 Repurchase agreements 82,201 (4,031) 78,170 Total 186,414 (46,540) 139,874 December 31, 2017 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 103,896 (37,960) 65,936 Repurchase agreements 110,953 (7,145) 103,808 Total 214,849 (45,105) 169,744 December 31, 2016 Million of euros Gross amount of financial Net amount of Gross amount assets offset financial liabilities of financial in the balance presented in the Liabilities liabilities sheet balance sheet Derivatives 127,784 (45,259) 82,525 Repurchase agreements 82,543 (2,213) 80,330 Total 210,327 (47,472) 162,855
Schedule of tangible asset depreciation rates	Average annual rate Buildings for own use 2.0 % Furniture 7.7 % Fixtures 7.0 % Office and IT equipment 25.0 % Leasehold improvements 7.0 %

Santander Group (Tables)

Santander Group (Tables)	12 Months Ended
	Dec. 31, 2018
Banco Popular Espanol, S.A.
Disclosure of detailed information about business combination [line items]
Disclosure of detailed information about business combination [text block]	Million As of June 7, 2017 of euros Cash and balances with central banks 1,861 Financial assets available-for-sale 18,974 Deposits from credit institutions 2,971 Loans and receivables (*) 82,057 Investments 1,815 Intangible assets (*) 133 Tax assets (*) 3,945 Non-current assets held for sale (*) 6,531 Other assets 6,259 Total assets 124,546 Deposits from central banks 28,845 Deposits from credit institutions 14,094 Customer deposits 62,270 Marketable debt securities and other financial liabilities 12,919 Provisions (***) 1,816 Other liabilities 4,850 Total liabilities (**) 124,794 Net assets (248) Purchase consideration — Goodwill 248 (*) - Loans and receivables: in the estimation of their fair value, impairment have been considered for an approximate amount of EUR 3,239 million, considering, among others, the sale process carried out by the Bank. - Foreclosed assets: the valuation, considering the sale process carried out by the company, has meant a reduction in the value of EUR 3,806 million, approximately. - Intangible assets: includes value reductions amounting to approximately of EUR 2,469 million, mainly recorded under the “Intangible assets - goodwill”. - Deferred tax assets: mainly corresponds to the reduction of the value of negative tax bases and deductions for an approximate amount of EUR 1,711 million. (**) After the initial analysis and the conversion of the subordinated debt, the best estimation is there is no significant impact between fair value and previous carrying amount of the financial liabilities. (***) As a result of the resolution of Banco Popular, it includes the estimated cost of EUR 680 million relating to the potential compensation to the shareholders of Banco Popular of which EUR 535 million have been applied to the fidelity action.

Distribution of the Bank's pr_2

Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share (Tables)	12 Months Ended
	Dec. 31, 2018
Shareholder remuneration system and earnings per share
Schedule of proposed distribution of net profit	Million of euros First and third interim dividends and final dividend 3,160 Acquisition, with a waiver of exercise, of bonus share rights from the shareholders which, under the Santander Dividendo Elección scrip dividend scheme, opted to receive in cash remuneration equivalent to the second interim dividend 132 3,292 Of which: Approved at December 31, 2018 (*) 2,237 Final dividend 1,055 To voluntary reserves 9 Net profit for the year 3,301 (*) Recognised under Shareholders' equity – Interim dividends.
Earnings per share basic and diluted	Basic earnings per share are calculated by dividing the net profit attributable to the Group (adjusted by the after-tax amount of the remuneration of contingently convertible preference shares recognised in equity - See Note 23) and the capital perpetual preference shares, if applicable, by the weighted average number of ordinary shares outstanding during the year, excluding the average number of treasury shares held in the year. Accordingly: 2018 2017 2016 Profit attributable to the parent (million of euros) 7,810 6,619 6,204 Remuneration of contingently convertible preference shares (CCP) (million of euros) (Note 23) (560) (395) (334) 7,250 6,224 5,870 Of which: Profit or Loss from discontinued operations (non controlling interest net) (million of euros) — — — Profit or Loss from continuing operations (net of non-controlling interests and CCP) (million of euros) 7,250 6,224 5,870 Weighted average number of shares outstanding 16,150,090,739 15,394,458,789 14,656,359,963 Adjusted number of shares 16,150,090,739 15,394,458,789 14,656,359,963 Basic earnings per share (euros) 0.449 0.404 0.401 Basic earnings per share from discontinued operations (euros) Basic earnings per share from continuing operations (euros) 0.449 0.404 0.401 ii. Diluted earnings per share Diluted earnings per share are calculated by dividing the net profit attributable to the Group (adjusted by the after-tax amount of the remuneration of contingently convertible preference shares recognised in equity - See Note 23) and the capital perpetual preference shares, if applicable, by the weighted average number of ordinary shares outstanding during the year, excluding the average number of treasury shares and adjusted for all the dilutive effects inherent to potential ordinary shares (share options, and convertible debt instruments). Accordingly, diluted earnings per share were determined as follows: 2018 2017 2016 Profit attributable to the parent (million of euros) 7,810 6,619 6,204 Remuneration of contingently convertible preference shares (CCP) (million of euros) (Note 23) (560) (395) (334) 7,250 6,224 5,870 Of which: Profit (Loss) from discontinued operations (net of non-controlling interests) (million of euros) — — Profit from continuing operations (net of non-controlling interests and CCP) (million of euros) 7,250 6,224 5,870 Weighted average number of shares outstanding 16,150,090,739 15,394,458,789 14,656,359,963 Dilutive effect of options/rights on shares 42,873,078 50,962,887 45,754,981 Adjusted number of shares 16,192,963,817 15,445,421,676 14,702,114,944 Diluted earnings per share (euros) 0.448 0.403 0.399 Diluted earnings per share from discontinued operations (euros) 0.000 0.000 Diluted earnings per share from continuing operations (euros) 0.448 0.403 0.399

Remuneration and other benefi_2

Remuneration and other benefits paid to the Bank's directors and senior managers (Tables)	12 Months Ended
	Dec. 31, 2018
Directors
Related party transactions key personnel
Schedule summarising annual emolument	Euros 2018 2017 Members of the board of directors 90,000 87,500 Members of the executive committee 170,000 170,000 Members of the audit committee 40,000 40,000 Members of the appointments committee 25,000 25,000 Members of the remuneration committee 25,000 25,000 Members of the risk supervision, regulation and compliance oversight committee 40,000 40,000 Members of the responsible banking, sustainability and culture committee 15,000 — Chairman of the audit committee 70,000 50,000 Chairman of the appointments committee 50,000 50,000 Chairman of the remuneration committee 50,000 50,000 Chairman of the risk, regulation and compliance oversight committee 70,000 50,000 Chairman of the responsible banking, sustainability and culture committee 50,000 — Lead director (*) 110,000 110,000 Non-executive deputy chairman 30,000 30,000 (*) Mr Bruce Carnegie-Brown, for duties performed as part of the board and board committees, specifically as chairman of the appointments and remuneration committees and as lead director, and for the time and dedication required to perform these duties, has been allocated minimum total annual remuneration of EUR 700,000 since 2015, including the aforementioned annual allowances and attendance fees corresponding to him.
Schedule summarising attendance fees	Euros Meeting attendance fees 2018 2017 Board of directors 2,600 2,600 Audit committee and risk supervision, regulation and compliance oversight committee 1,700 1,700 Other committees (except the executive committee) 1,500 1,500
Schedule summarising short-term remuneration (excluding remuneration subject to long-term objectives)	Thousand of euros 2018 2017 Bylaw-stipulated emoluments Short-term and deferred (not subject to long-term goals) salaries of Annual emolument executive directors Risk Responsible regulation and banking Attendance Variable – compliance sustainability fees immediate payment Deferred variable Other Executive Audit Appointments Remuneration oversight and culture and In In In In Pension Remuneration Directors Board committee committee committee committee committee committee commissions Fixed cash shares cash shares Total contribution (6) Total Total Ms Ana Botín-Sanz de Sautuola y O’Shea 90 170 — — — — 8 39 3,176 1,480 1,480 888 888 7,912 1,234 1,030 10,483 10,582 Mr José Antonio Álvarez Álvarez 90 170 — — — — — 34 2,541 989 989 593 593 5,705 1,050 1,596 8,645 8,893 Mr Rodrigo Echenique Gordillo 90 170 — — — — — 33 1,800 785 785 471 471 4,312 — 225 4,830 4,281 Mr Guillermo de la Dehesa Romero 120 170 — 25 25 20 — 81 — — — — — — — — 441 473 Mr Bruce Carnegie-Brown 383 170 — 25 25 40 — 89 — — — — — — — — 732 731 Mr Ignacio Benjumea Cabeza de Vaca 90 170 — 13 25 40 8 86 — — — — — — — 81 513 550 Mr Francisco Javier Botín-Sanz de Sautuola y O’Shea (1) 90 — — — — — — 31 — — — — — — — — 121 124 Ms Sol Daurella Comadrán 90 — — 25 25 — 8 67 — — — — — — — — 215 207 Mr Carlos Fernández González 90 — 40 25 25 — — 86 — — — — — — — — 266 285 Ms Esther Giménez-Salinas i Colomer 90 — — — — 40 8 58 — — — — — — — — 196 162 Ms Belén Romana García 160 85 40 — — 40 8 81 — — — — — — — — 414 297 Mr Juan Miguel Villar Mir 90 — — — — — — 18 — — — — — — — — 108 170 Ms Homaira Akbari 90 — 40 — — — 8 61 — — — — — — — — 199 159 Mr Ramiro Mato García Ansorena (2) 115 170 40 — — 40 8 77 — — — — — — — — 450 36 Mr Alvaro Cardoso de Souza (3) 85 — — — — 27 5 31 — — — — — — — — 148 — Mr Matías Rodríguez Inciarte (4) — — — — — — — — — — — — — — — — — 4,266 Ms Isabel Tocino Biscarolasaga (5) — — — — — — — — — — — — — — — — — 418 Total 2018 1,763 1,275 160 113 125 247 61 872 7,517 3,254 3,254 1,952 1,952 17,929 2,284 2,932 27,761 — Total 2017 1,675 1,345 160 125 123 280 — 973 7,568 3,698 3,698 2,219 2,219 19,402 5,164 2,387 — 31,634 (1) All the amounts received were repaid to the Fundación Marcelino Botín. (2) Director since 28 November 2017 (3) Director since 23 March 2018 (4) Ceased to be a member of the Board on 28 November, 2017. This table shows the remuneration information until his ceased as a member of the board. The remuneration information for his performance as executive vice president since November 28, 2017 is included in the corresponding section. (5) Ceased to be a member of the board on 28 November, 2017. (6) Includes committee chairmanship and other roles emoluments. (7) Includes, inter alia, the life and medical insurance costs borne by the Group relating to Bank directors as well as a fixed supplement approved as part of the benefit systems transformation of the Executive Directors Ms Ana Botín and Mr José Antonio Álvarez
Schedule summarising remuneration related to multi-annual variable objectives	Thousand of euros 2018 2017 Variable subject to Long-term objectives(2) In cash In shares Total Total (2) Ms. Ana Botín-Sanz de Sautuola y O’Shea 932 932 1,864 1,726 Mr. José Antonio Álvarez Álvarez 623 623 1,246 1,154 Mr. Rodrigo Echenique Gordillo 495 495 990 900 Mr. Matías Rodríguez Inciarte(1) — — — 880 Total 2,050 2,050 4,100 4,660 (1) Ceased to be a member of the board on November 28, 2017. The remuneration information for his performance as executive vice president is included in the corresponding section. (2) Corresponds with the fair value of the maximum amount they are entitled to in a total of 3 years: 2022, 2023 and 2024, subject to conditions of continued service, with the exceptions provided, and to the non-applicability of “malus” clauses and achievement of the objectives established. The fair value has been determined at the grant date based on the valuation report of an independent expert, Willis Towers Watson. According to the design of the plan for 2018 and the levels of achievement of similar plans in comparable entities, the expert concludes that the reasonable range for estimating the initial achievement ratio is around 60% - 80%. It has been considered that the fair value is 70% of the maximum (see Note 47).
Schedule summarising remuneration related to welfare system	Thousand of euros 2018 2017 Ms Ana Botín-Sanz de Sautuola y O’Shea (1) 46,093 45,798 Mr José Antonio Álvarez Álvarez 16,630 16,151 Mr Rodrigo Echenique Gordillo (2) 13,614 13,957 Mr Matías Rodríguez Inciarte (3) — — 76,337 75,906 (1) Includes the amounts relating to the period of provision of services at Banesto, externalised with another insurance company. (2) Executive director since January 16, 2015 Mr. Rodrigo Echenique Gordillo doesn´t participate in the pension system and the right to the bank to make contributions in its favour in this regard. The amount at December 31, 2018 and 2017, corresponds to him prior to his appointment as executive director in January 2015. (3) Ceased to be a member of the Board on November 28, 2017, retained their pension rights as of December 31,, 2017 amounted to EUR 48,750 thousand.
Schedule summarising remuneration related to provisions for retirement pensions and supplementary benefits	Thousand of euros 2018 2017 Ms Ana Botín-Sanz de Sautuola y O’Shea 1,234 2,707 Mr José Antonio Álvarez Álvarez 1,050 2,456 2,284 5,163
Schedule summarising remuneration related to life and disability insurance	Insured capital (Thousand of euros) 2018 2017 Ms. Ana Botín-Sanz de Sautuola y O’Shea 22,710 7,500 Mr. José Antonio Álvarez Álvarez 19,694 6,000 Mr. Rodrigo Echenique Gordillo 5,400 4,500 Mr. Matías Rodríguez Inciarte (1) — — 47,804 18,000 (1) Ceased to be member of the board on November 28, 2017. The insured capital at December 31, 2017 amounted to EUR 5,131 thousand.
Schedule summarising the cash paid for awards	Thousand of euros 2018 2017 Cash Cash paid paid (one-third of (deferred deferred Cash paid payments from Cash paid payment (immediate 2016, 2015 (immediate 2015, 2014 payment 2017 and payment 2016 and variable 2014 variable variable 2013 variable remuneration) remuneration) remuneration) remuneration) Ms. Ana Botín-Sanz de Sautuola y O’Shea 1,370 947 1,205 825 Mr. José Antonio Álvarez Álvarez (1) 916 574 814 461 Mr. Rodrigo Echenique Gordillo 714 305 603 124 Mr. Matías Rodríguez Inciarte (2) — — 718 690 3,000 1,826 3,339 2,099 (1) Includes paid cash corresponding to his participation in the corresponding plans during the time as executive vice president. (2) Ceased to be a member of the Board on November 28, 2017. The cash paid corresponding to his variable remuneration between November 28, 2017 and January 2, 2018 as executive vice president is included in Note 5.g.
Schedule summarising declaration of equity interests held by key personnel	Number of Administrator Denomination shares Functions Ms. Ana Botín-Sanz de Sautuola y O’Shea Bankinter, S.A. (1) 5,000,000 — Mr. Bruce Neil Carnegie-Brown Moneysupermarket.com Group plc 30,000 President (2) Lloyd’s of London Ltd — President (2) Mr. Rodrigo Echenique Gordillo Mitsubishi UFJ Financial Group (1) 17,500 — — Mr. Guillermo de la Dehesa Romero Goldman, Sachs & Co. (The Goldman Sachs Group, Inc.) 19,546 — Mr. Javier Botín-Sanz de Sautuola y O’Shea Bankinter, S.A. 6,929,853 — JB Capital Markets Sociedad de Valores, S.A. 2,077,198 President Ms. Esther Giménez-Salinas i Colomer Gawa Capital Partners, S.L. — Manager officer (2) Mr. Ramiro Mato García-Ansorena BNP Paribas, S.A. 13,806 — (1) Indirect ownership. (2) Non-executive.
Summary quantitative data about entity's exposure to risk [text block]	Thousand of euros 2018 2017 Loans Loans and and credits Guarantees Total credits Guarantees Total Ms. Ana Botín-Sanz de Sautuola y O’Shea 18 — 18 10 — 10 Mr. José Antonio Álvarez Álvarez 8 — 8 9 — 9 Mr. Bruce Carnegie-Brown — — — — — — Mr. Matías Rodríguez Inciarte (1) — — — — — — Mr. Rodrigo Echenique Gordillo 29 — 29 22 — 22 Mr. Javier Botín-Sanz de Sautuola y O’Shea 15 — 15 17 — 17 Ms. Sol Daurella Comadran 53 — 53 27 — 27 Mr.Carlos Fernandez Gonzalez 12 — 12 — — — Ms. Esther Gimenez-Salinas i Colomer 1 — 1 — — — Mr. Ignacio Benjumea Cabeza de Vaca — — — — — — Ms. Belén Romana García 21 — 21 3 — 3 Mr. Guillermo de la Dehesa Romero 21 — 21 — — — 178 — 178 88 — 88 (1) Ceased to be a board director on November 28, 2017. On December 31, 2017, to loans and credits amounted to EUR 13 thousand.
Directors | ILP
Related party transactions key personnel
Schedule summarising shares assigned for deferred variable remuneration plans	Number of shares Approved maximum LTI Final number amount (1) Ratio of shares Ms Ana Botín-Sanz de Sautuola y O’Shea 187,070 % 122,849 Mr José Antonio Álvarez Álvarez 126,279 % 82,927 Mr Rodrigo Echenique Gordillo 93,540 % 61,428 Total 406,889 267,204 (1) 91.50% of the maximum established benchmark approved at the AGM on March 27, 2015.
Directors | Deferred variable compensation plans
Related party transactions key personnel
Schedule summarising shares assigned for deferred variable remuneration plans	Shares Shares Shares Shares Shares Shares Variable Maximum delivered delivered delivered delivered Shares Variable delivered delivered Shares Shares remuneration Maximum number of in 2017 in 2017 in 2017 in 2017 arising from remuneration Maximum in 2018 in 2018 delivered delivered 2018 number shares to be (immediate (deferred (deferred (deferred the capital 2017 (maximum number (immediate (deferred in, 2018 (deferred in, 2018 (deferred (maximum of shares delivered at payment 2016 payment 2014 payment 2013 payment 2012 increase of number of of shares to be payment 2016 payment 2015 payment 2014 payment 2013 number of to be delivered at Share-based January 1, variable variable variable variable July shares to be delivered at variable variable variable variable shares to be December 31, variable remuneration 2017 remuneration) remuneration) remuneration) remuneration) 2017 delivered) December 31, 2017 remuneration) remuneration) remuneration) remuneration) delivered) (1) 2018(4) 2013 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 33,120 (33,120) — Mr. José Antonio Álvarez Álvarez (2) 19,561 (19,561) — Mr. Matías Rodríguez Inciarte 34,547 (34,547) — 87,228 (87,228) — 2014 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 121,630 (60,814) 905 61,721 — (61,721) — Mr. José Antonio Álvarez Álvarez (2) 52,484 (26,242) 390 26,632 — (26,632) — Mr. Matías Rodríguez Inciarte (3) 92,725 (46,363) 690 47,052 — (47,052) — 266,839 (133,419) 1,985 135,405 — (135,405) — 2015 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 317,300 (63,460) 3,777 257,617 — (64,404) 193,213 Mr. José Antonio Álvarez Álvarez (2) 210,914 (42,183) 2,511 171,242 — (42,811) 128,431 Mr. Rodrigo Echenique Gordillo 156,233 (31,247) 1,860 126,846 — (31,712) 95,134 Mr. Matías Rodríguez Inciarte 216,671 (43,334) 2,579 175,916 — (43,979) 131,937 901,118 (180,224) 10,727 731,621 — (182,906) 548,715 2016 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 592,043 (236,817) 5,286 360,512 — (72,102) 288,410 Mr. José Antonio Álvarez Álvarez (2) 399,607 (159,843) 3,568 243,332 — (48,667) 194,665 Mr. Rodrigo Echenique Gordillo 295,972 (118,389) 2,643 180,226 — (36,046) 144,180 Mr. Matías Rodríguez Inciarte 352,455 (140,982) 3,147 214,620 — (42,924) 171,696 1,640,077 (656,031) 14,644 998,690 — (199,739) 798,951 2017 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea 574,375 574,375 (229,750) — 344,625 Mr. José Antonio Álvarez Álvarez (2) 384,118 384,118 (153,647) — 230,471 Mr. Rodrigo Echenique Gordillo 299,346 299,346 (119,738) — 179,608 Mr. Matías Rodríguez Inciarte (3) 292,771 292,771 (117,108) — 175,662 1,550,610 1,550,610 (620,243) — 930,366 2018 variable remuneration Ms. Ana Botín-Sanz Sautuola y O’Shea — — 860,865 860,865 Mr. José Antonio Álvarez Álvarez (2) — — 575,268 575,268 Mr. Rodrigo Echenique Gordillo — — 456,840 456,840 — — 1,892,973 1,892,973 (1) For each director, 40% of the shares indicated correspond to the short-term variable (or immediate payment). The remaining 60% is deferred for delivery, where appropriate, by fifths in the next five years, the last three being subject to the fulfilment of multiannual objectives. (2) Maximum number of shares resulting from their participation in the corresponding plans during their stage as general manager. (3) Ceased to be a member of the Board on November 28, 2017. The shares corresponding to his variable remuneration between November 28, 2017 and January 2, 2018 as executive vice president are included in Note 5.g. (4) In addition, Mr. Ignacio Benjumea Cabeza de Vaca maintains the right to a maximum of 106,113 shares arising from his participation in the corresponding plans during his term as executive vice president.
Current senior managers
Related party transactions key personnel
Schedule summarising short-term remuneration (excluding remuneration subject to long-term objectives)	Thousand of euros Short-term salaries and deferred remuneration Variable remuneration (bonus) - Deferred Immediate variable payment remuneration Number of In In In In Other Year persons Fixed cash shares (2) cash shares Pensions remuneration (1) Total (3) 2018 18 22,475 8,374 8,374 3,791 3,791 6,193 7,263 60,261 2017 19 17,847 8,879 8,879 4,052 4,052 13,511 7,348 64,568 (1) Includes other remuneration items such as life insurance premiums and localization aids totalling EUR 1,641 thousand (2017: EUR 692 thousand). (2) The amount of the immediate payment in shares for 2018 relates to Santander shares 1,936,037 (2017: 1,430,143 Santander shares and 225,564 shares of Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México. (3) Additionally, and as a result of the incorporation and compensation agreements of long-term and deferred compensation lost in previous jobs, compensations were agreed in 2017 for the amount of EUR 4,650 thousand and 648,457 shares of Banco Santander, S.A. These compensations are partially subject to deferral and / or recovery in certain cases.
Schedule summarising remuneration related to multi-annual variable objectives	Thousand of euros Variable remuneration subject to long-term objectives (1) Year Number of people Cash payment Share payment Total 2018 18 3,981 3,981 7,962 2017 19 4,255 4,255 8,510 (1) Relates in 2018 with the fair value of the maximum annual amounts for years 2022, 2023 and 2024 of the third cycle of the deferred conditional variable remuneration plan (2021, 2022 and 2023 for the first cycle of the deferred variable compensation plan linked to annual objectives for the year 2017).
Schedule summarising shares assigned for deferred variable remuneration plans	Maximum number of shares to be delivered (1) 2018 2017 Deferred conditional variable remuneration plan (2014) — 323,424 Deferred conditional variable remuneration plan (2015) 705,075 1,296,424 Performance shares plan ILP (2015) 515,456 1,050,087 Deferred conditional variable remuneration plan and linked to objectives (2016) 1,079,654 1,854,495 Deferred conditional variable remuneration plan and linked to objectives (2017) 1,434,047 1,779,302 Deferred conditional variable remuneration plan and linked to objectives (2018) 2,192,901 — (1) At the proposal of the remuneration committee, the board of directors approved adjusting the maximum number of shares to mitigate the dilutive effect of the capital increase with pre-emptive subscription rights of July 2017 as described in iv) below. The actions derived from this adjustment are 66,339 shares.
Former directors of the bank
Related party transactions key personnel
Schedule summarising shares assigned for deferred variable remuneration plans	Maximum number of shares to be delivered (1) 2018 2017 Deferred conditional variable remuneration plan (2014) — 101,537 Deferred conditional variable remuneration plan (2015) 50,604 67,472 Plan performance shares (ILP 2015) 33,785 51,447 Deferred conditional variable remuneration plan (2016) — — Number of shares delivered 2018 2017 Deferred conditional variable remuneration plan (2013) — 80,718 Deferred conditional variable remuneration plan (2014) 101,537 100,049 Deferred conditional variable remuneration plan (2015) 16,868 16,621 Deferred conditional variable remuneration plan (2016) — — (1)
Executive vice presidents
Related party transactions key personnel
Schedule summarising shares assigned for deferred variable remuneration plans	Number of shares delivered 2018 2017 Deferred conditional variable remuneration plan (2013) — 226,766 Deferred conditional variable remuneration plan (2014) 248,963 318,690 Deferred conditional variable remuneration plan (2015) 261,109 349,725 Deferred conditional variable remuneration plan and linked to objectives (2016) 258,350 —

Loans and advances to central_2

Loans and advances to central banks and credit institutions (Tables)	12 Months Ended
	Dec. 31, 2018
Loans and advances to central banks and credit institutions
Loans and advances to banks and credit institutions	Million of euros 2018 (*) 2017 2016 CENTRAL BANKS Classification: Financial assets held for trading — — — Non-trading financial assets mandatorily at fair value through profit or loss — Financial assets designated at fair value through profit or loss 9,226 — — Financial assets designated at fair value through other comprehensive income — Financial assets at amortised cost 15,601 Loans and receivables — 26,278 27,973 24,827 26,278 27,973 Type: Time deposits 15,601 17,359 14,445 Reverse repurchase agreements 9,226 8,919 13,528 Impaired assets — — — Valuation adjustments for impairment — — — 24,827 26,278 27,973 CREDIT INSTITUTIONS Classification: Financial assets held for trading — 1,696 3,221 Non-trading financial assets mandatorily at fair value through profit or loss 2 Financial assets designated at fair value through profit or loss 23,097 9,889 10,069 Financial assets designated at fair value through other comprehensive income — Financial assets at amortised cost 35,480 Loans and receivables — 39,567 35,424 58,579 51,152 48,714 Type: Time deposits 10,759 8,169 6,577 Reverse repurchase agreements 33,547 21,765 20,867 Non- loans advances 14,283 21,232 21,281 Impaired assets 2 4 4 Valuation adjustments for impairment (12) (18) (15) 58,579 51,152 48,714 Currency: Euro 24,801 23,286 24,278 Pound sterling 4,073 5,582 4,337 US dollar 19,238 15,325 11,996 Brazilian real 28,310 28,140 32,013 Other currencies 6,984 5,097 4,063 TOTAL 83,406 77,430 76,687 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b) .

Debt Instruments (Tables)

Debt Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of financial assets [line items]
Schedule of debt instruments	Million of euros 2018 (*) 2017 2016 Classification: Financial assets held for trading 27,800 36,351 48,922 Non-trading financial assets mandatorily at fair value through profit or loss 5,587 Financial assets designated at fair value through profit or loss 3,222 3,485 3,398 Financial assets designated at fair value through other comprehensive income 116,819 Financial assets available-for-sale — 128,481 111,287 Financial assets at amortised cost 37,696 Loans and receivables — 17,543 13,237 Held-to-maturity investments — 13,491 14,468 191,124 199,351 191,312 Type: Spanish government debt securities (**) 50,488 59,186 45,696 Foreign government debt securities 99,959 99,424 103,070 Issued by financial institutions 10,574 12,155 16,874 Other fixed-income securities 29,868 28,299 25,397 Impaired financial assets 870 1,017 773 Impairment losses (635) (730) (498) 191,124 199,351 191,312 Currency: Euro (**) 76,513 93,250 73,791 Pound sterling 19,153 16,203 16,106 US dollar 22,864 25,191 31,401 Brazilian real 40,871 39,233 43,370 Other currencies 32,358 26,204 27,142 Total gross 191,759 200,081 191,810 Impairment losses (635) (730) (498) 191,124 199,351 191,312 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) The increase in 2017 corresponds mainly to Banco Popular Español, S.A.U. acquisition.
Schedule of debt instruments by origin of issuer	Million of euros 2018 2017 2016 Private Public Private Public Private Public fixed-income fixed-income Total % fixed-income fixed-income Total % fixed-income fixed-income Total % Spain 4,748 50,488 55,236 28.90 % 5,272 59,186 64,458 32.33 % 6,153 45,696 51,849 27.10 % United Kingdom 5,615 9,512 15,127 7.91 % 4,339 10,717 15,056 7.55 % 3,531 11,910 15,441 8.07 % Portugal 3,663 6,943 10,606 5.55 % 3,972 7,892 11,864 5.95 % 4,068 7,689 11,757 6.15 % Italy (*) 857 3,134 3,991 2.09 % 1,287 7,171 8,458 4.24 % 1,035 3,547 4,582 2.40 % Ireland (**) 4,543 2 4,545 2.38 % 3,147 2 3,149 1.58 % 518 — 518 0.27 % Poland 683 10,489 11,172 5.85 % 772 6,619 7,391 3.71 % 707 6,265 6,972 3.64 % Other European countries 6,101 1,518 7,619 3.99 % 7,195 1,733 8,928 4.48 % 7,203 1,736 8,939 4.67 % United States 6,833 10,362 17,195 9.00 % 7,986 11,670 19,656 9.86 % 10,559 13,058 23,617 12.34 % Brazil 5,285 36,583 41,868 21.91 % 4,729 34,940 39,669 19.90 % 5,364 39,770 45,134 23.59 % Mexico 520 11,325 11,845 6.20 % 461 9,478 9,939 4.99 % 587 10,628 11,215 5.86 % Chile 79 2,729 2,808 1.47 % 62 4,071 4,133 2.07 % 1,315 3,643 4,958 2.59 % Other American countries 1,111 1,375 2,486 1.30 % 755 913 1,668 0.84 % 782 1,262 2,044 1.07 % Rest of the world 639 5,987 6,626 3.47 % 764 4,218 4,982 2.50 % 724 3,562 4,286 2.24 % 40,677 150,447 191,124 100 % 40,741 158,610 199,351 100 % 42,546 148,766 191,312 100 % (*) Of the exposure in Italy, EUR 1,855 million corresponds to bonds sold in forward. (**) Includes mainly UK securities issued by Irish vehicles with underlying risk UK.
Schedule of debt instruments by issuer rating	Credit risk with customers (*) (million of euros) Non-performing loans NPL ratio (%) 2018 2017 2016 2018 2017 2016 2018 2017 2016 Continental Europe 429,454 424,248 331,706 22,537 24,674 19,638 5.25 5.82 5.92 Spain 239,479 251,433 172,974 14,833 15,880 9,361 6.19 6.32 5.41 Santander Consumer Finance 97,922 92,589 88,061 2,244 2,319 2,357 2.29 2.50 2.68 Portugal 38,340 39,394 30,540 2,279 2,959 2,691 5.94 7.51 8.81 Poland 30,783 24,391 21,902 1,317 1,114 1,187 4.28 4.57 5.42 UK 262,196 247,625 255,049 2,755 3,295 3,585 1.05 1.33 1.41 Latin América 171,898 167,516 173,150 7,461 7,464 8,333 4.34 4.46 4.81 Brazil 84,212 83,076 89,572 4,418 4,391 5,286 5.25 5.29 5.90 Mexico 33,764 28,939 29,682 822 779 819 2.43 2.69 2.76 Chile 41,268 40,406 40,864 1,925 2,004 2,064 4.66 4.96 5.05 Argentina 5,631 8,085 7,318 179 202 109 3.17 2.50 1.49 US 92,152 77,190 91,709 2,688 2,156 2,088 2.92 2.79 2.28 Santander Bank, National Association 51,049 44,237 54,040 450 536 717 0.88 1.21 1.33 Santander Consumer USA 26,424 24,079 28,590 2,043 1,410 1,097 7.73 5.86 3.84 Group Total 958,153 920,968 855,510 35,692 37,596 33,643 3.73 4.08 3.93 (*) Includes gross lending to customers, guarantees and documentary credits.
Debt instruments
Disclosure of financial assets [line items]
Schedule of debt instruments by issuer rating	Million of euros 2018 2017 2016 Private Public Private Public Private Public fixed-income fixed-income Total % fixed-income fixed-income Total % fixed-income fixed-income Total % AAA 18,901 834 19,735 10.33 % 16,239 924 17,163 8.61 % 18,916 1,008 19,924 % AA 2,715 20,966 23,681 12.39 % 2,714 23,522 26,236 13.16 % 1,632 29,639 31,271 % A 3,464 69,392 72,856 38.12 % 4,373 8,037 12,410 6.23 % 2,928 3,285 6,213 % BBB 5,093 21,837 26,930 14.09 % 6,449 91,012 97,461 48.89 % 7,579 66,955 74,534 % Below BBB 668 37,412 38,080 19.92 % 2,393 35,109 37,502 18.81 % 4,751 47,872 52,623 % Unrated 9,836 6 9,842 5.15 % 8,573 6 8,579 4.30 % 6,740 7 6,747 % 40,677 150,447 191,124 100 % 40,741 158,610 199,351 100 % 42,546 148,766 191,312 100 %
Schedule of changes in impairment losses on debt instruments	Million of euros 2018 (*) 2017 2016 Balance at beginning of year 704 498 291 Net impairment losses for the year (**) 43 348 380 Of which: Impairment losses charged to income 138 386 423 Impairment losses reversed with a credit to income (95) (38) (43) Exchange differences and other items (112) (116) (172) Balance at end of year 635 730 498 Of which: By geographical location of risk: European Union 22 30 40 Latin America 613 700 458 (**) Of which: Loans and advances — 348 405 Financial assets at amortised cost 43 Financial assets available for sale — — (25) Financial assets designated at fair value through other comprehensive income — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Private fixed income
Disclosure of financial assets [line items]
Schedule of debt instruments	Million of euros 2018 2017 2016 Securitised mortgage bonds 2,942 2,458 1,584 Other asset-backed bonds 9,805 5,992 2,803 Floating rate debt 13,721 13,756 11,818 Fixed rate debt 14,209 18,535 26,341 Total 40,677 40,741 42,546

Equity Instrument (Tables)

Equity Instrument (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of financial assets [line items]
Detail, by classification and type, of Equity instruments	Million of euros 2018 (*) 2017 2016 Classification: Financial assets held for trading 8,938 21,353 14,497 Non-trading financial assets mandatorily at fair value through profit or loss 3,260 Financial assets designated at fair value through profit or loss — 933 546 Financial assets designated at fair value through other comprehensive income 2,671 Financial assets available-for-sale — 4,790 5,487 14,869 27,076 20,530 Type: Shares of Spanish companies 3,448 4,199 3,098 Shares of foreign companies 9,107 20,448 15,342 Investment fund shares 2,314 2,429 2,090 14,869 27,076 20,530 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Equity instruments
Disclosure of financial assets [line items]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [text block]	Million of euros 2018 (*) 2017 2016 Balance at beginning of the year 3,169 5,487 4,849 Net additions (disposals) (324) (331) (294) Of which: Visa Europe, Ltd. — — (263) Valuation adjustment and other items (174) (366) 932 Balance at end of year 2,671 4,790 5,487 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).

Trading derivatives (assets a_2

Trading derivatives (assets and liabilities) and short positions (Tables)	12 Months Ended
	Dec. 31, 2018
Trading Derivatives And Short Positions [Abstract]
Schedule by type of inherent risk of fair value of trading derivatives	Million of euros 2018 2017 2016 Debit Credit Debit Credit Debit Credit balance balance balance balance balance balance Interest rate risk 36,087 36,487 38,030 37,582 47,884 48,124 Currency risk 16,912 17,025 16,320 18,014 21,087 23,500 Price risk 2,828 1,673 2,167 2,040 2,599 2,402 Other risks 112 156 726 256 473 343 55,939 55,341 57,243 57,892 72,043 74,369
Schedule of short positions (liabilities)	Million of euros 2018 2017 2016 Borrowed securities: Debt instruments 1,213 2,447 2,250 Of which: Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 1,213 890 930 Santander UK plc — 1,557 1,319 Equity instruments 1,087 1,671 1,142 Of which: Santander UK plc — 1,500 991 Banco Santander, S.A. 987 98 103 Short sales: Debt instruments 12,702 16,861 19,613 Of which: Banco Santander, S.A. 5,336 8,621 7,472 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 26 46 1,872 Banco Santander (Brasil) S.A. 7,300 8,188 9,197 15,002 20,979 23,005

Loans and advances to customer

Loans and advances to customer (Tables)	12 Months Ended
	Dec. 31, 2018
Loans And Advances To Customers Line Items
Schedule of detail, by classification, of loans and advances to customers	Million of euros 2018 (*) 2017 2016 Financial assets held for trading (**) 202 8,815 9,504 Non-trading financial assets mandatorily at fair value through profit or loss 1,881 Financial assets designated at fair value through profit or loss 21,915 20,475 17,596 Financial assets at fair value through other comprehensive income 1,601 Financial assets at amortised cost 857,322 Loans and receivables — 819,625 763,370 Of which: Impairment losses (23,307) (23,934) (24,393) 882,921 848,915 790,470 Loans and advances to customers disregarding impairment losses 906,228 872,849 814,863 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) The decrease reflects the run-down of UK's trading business due to the banking reform (Ring-fencing).
Schedule of the breakdown of loans and advances to customers	Million of euros 2018 2017 2016 Loan type and status: Commercial credit 33,301 29,287 23,894 Secured loans 478,068 473,936 454,677 Reverse repurchase agreements 32,310 18,864 16,609 Other term loans 265,696 257,441 232,288 Finance leases 30,758 28,511 25,357 Receivable on demand 8,794 6,721 8,102 Credit cards receivables 23,083 21,809 21,363 Impaired assets 34,218 36,280 32,573 906,228 872,849 814,863 Geographical area: Spain 215,764 227,446 161,372 European Union (excluding Spain) 411,550 390,536 379,666 United States and Puerto Rico 89,325 75,777 87,318 Other OECD countries 82,607 74,463 74,157 Latin America (non-OECD) 87,406 88,302 93,207 Rest of the world 19,576 16,325 19,143 906,228 872,849 814,863 Interest rate formula: Fixed rate 497,365 447,788 417,448 Floating rate 408,863 425,061 397,415 906,228 872,849 814,863
Schedule of loans and advances to customers in detail by activity	Million of euros Secured loans Net exposure Loan-to-value ratio (***) More than More than More than 40% and 60% and 80% and Of which: Of which: Less than less than less than less than Without property other or equal or equal to or equal to or equal to More than Total collateral collateral collateral to 40% 60% 80% 100% 100% Public sector 22,659 21,480 279 900 114 86 125 699 155 Other financial institutions (financial business activity) 53,155 15,929 864 36,362 684 388 196 35,663 295 Non-financial corporations and individual entrepreneurs (non-financial business activity) (broken down by purpose) 301,975 173,482 68,555 59,938 24,752 21,090 17,244 38,514 26,893 Of which: Construction and property development 24,641 1,884 20,855 1,902 8,300 6,224 4,208 2,126 1,899 Civil engineering construction 3,248 1,803 525 920 138 306 157 368 476 Large companies 156,666 104,023 18,949 33,694 5,766 6,671 6,657 19,022 14,527 SMEs and individual entrepreneurs 117,420 65,772 28,226 23,422 10,548 7,889 6,222 16,998 9,991 Households – other (broken down by purpose) 487,695 115,997 321,119 50,579 83,889 104,266 103,496 46,296 33,751 Of which: Residential 314,017 1,682 311,513 822 77,643 97,815 98,240 32,361 6,276 Consumer loans 156,116 109,810 2,387 43,919 3,406 4,709 3,225 8,766 26,200 Other purposes 17,562 4,505 7,219 5,838 2,840 1,742 2,031 5,169 1,275 Total (*) 865,484 326,888 390,817 147,779 109,439 125,830 121,061 121,172 61,094 Memorandum item Refinanced and restructured transactions (**) 30,527 6,278 14,032 10,217 3,328 3,422 3,210 3,541 10,748 (*) In addition, the Group has granted advances to customers amounting to EUR 17,437 million, bringing the total of loans and advances to EUR 882,921 million. (**) Includes the net balance of the impairment of the accumulated value or accumulated losses in the fair value due to credit risk. (***) The ratio is the carrying amount of the transactions at December 31, 2018 provided by the latest available appraisal value of the collateral.
Schedule of movement of gross exposure by impairment stage	Millions of euros Stage 1 Stage 2 Stage 3 Total Balance at the beginning of year 746,654 60,304 35,477 842,435 Movements Transfers Transfer to Stage 2 from Stage 1 (31,234) 31,234 — Transfer to Stage 3 from Stage 1 (3,980) 3,980 — Transfer to Stage 3 from Stage 2 (13,998) 13,998 — Transfer to Stage 1 from Stage 2 21,795 (21,795) — Transfer to Stage 2 from Stage 3 4,103 (4,103) — Transfer to Stage 1 from Stage 3 835 (835) — Net changes on financial assets 79,727 (5,265) (1,997) 72,465 Write-offs — — (12,673) (12,673) Exchange differences and others (17,968) (2,400) (386) (20,754) Loss allowance as of December 31, 2018 795,829 52,183 33,461 881,473
Schedule of changes in the impairment losses for loans and advances to customers	Million of euros 2018 2017 2016 Balance at beginning of year 36,280 32,573 36,133 Net additions 10,821 8,409 7,393 Written-off assets (12,673) (13,522) (12,758) Changes in the scope of consolidation 177 9,618 661 Exchange differences and other (387) (798) 1,144 Balance at end of year 34,218 36,280 32,573
Schedule of financial assets impaired, by geographical location and age	Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 5,671 780 551 656 8,724 16,382 European Union (excluding Spain) 2,940 1,213 577 519 2,662 7,911 United States and Puerto Rico 1,906 531 30 31 178 2,676 Other OECD countries 1,414 498 143 162 520 2,737 Latin America (non-OECD) 1,221 1,145 782 561 803 4,512 13,152 4,167 2,083 1,929 12,887 34,218 The detail at December 31, 2017 is as follows: Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 6,012 938 793 814 9,643 18,200 European Union (excluding Spain) 2,023 1,526 811 558 3,829 8,747 United States and Puerto Rico 1,221 641 42 50 192 2,146 Other OECD countries 1,523 563 166 128 378 2,758 Latin America (non-OECD) 945 1,309 709 578 888 4,429 11,724 4,977 2,521 2,128 14,930 36,280 The detail at December 31, 2016 is as follows: Million of euros With no With balances past due by past-due balances or less than 90 days 90 to 180 180 to 270 270 days More than past due days days to 1 year 1 year Total Spain 4,845 508 360 625 7,009 13,347 European Union (excluding Spain) 2,648 1,783 877 654 3,262 9,224 United States and Puerto Rico 805 833 38 61 242 1,979 Other OECD countries 1,601 481 145 158 474 2,859 Latin America (non-OECD) 1,242 1,059 1,131 677 1,055 5,164 11,141 4,664 2,551 2,175 12,042 32,573 Set forth below for each class of impaired asset are the gross amount, associated allowances and information relating to the collateral and/or other credit enhancements obtained at December 31, 2018: Million of euros Estimated Gross Allowance collateral amount recognised value(*) Without associated real collateral 13,250 (8,636) — With real estate collateral 16,228 (4,408) 11,653 With other collateral 4,740 (1,862) 1,913 Total 34,218 (14,906) 13,566 (*) Including the estimated value of the collateral associated with each loan. Accordingly, any other cash flows that may be obtained, such as those arising from borrowers’ personal guarantees, are not included.
Schedule of impairment loss and allowance for loans and advances to customers	Million of euros 2018 2017 2016 Balance at beginning of the year (*) 25,936 24,393 26,517 Impairment losses charged to income for the year 10,501 10,513 10,734 Of which: Impairment losses charged to profit or loss 17,850 19,006 17,081 Impairment losses reversed with a credit to profit or loss (7,349) (8,493) (6,347) Change of perimeter — — (136) Write-off of impaired balances against recorded impairment allowance (12,673) (13,522) (12,758) Exchange differences and other changes (**) (457) 2,550 36 Balance at end of the year 23,307 23,934 24,393 Which correspond to: Impaired assets 14,906 16,207 15,331 Other assets 8,401 7,727 9,062 Of which: Individually calculated 4,905 5,311 6,097 Collective calculated 18,402 18,623 18,296 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) In 2017, mainly includes the balances from the acquisition of Banco Popular Español, S.A.U.
Schedule of past-due loans classified as standard	Million of euros Less than1 1 to 2 2 to 3 month months months Loans and advances to customers 2,023 629 617 Of which Public Sector 5 — — Total 2,023 629 617
Schedule of the breakdown of the securitized loans, by type of original financial instrument, and of the securitized loans derecognized because the stipulated requirements were met	Million of euros 2018 2017 2016 Derecognised 47 241 477 Of which Securitised mortgage assets (*) 47 241 477 Retained on the balance sheet 88,767 91,208 100,675 Of which Securitised mortgage assets 33,900 36,844 44,311 Of which: UK assets 13,519 15,694 20,969 Other securitised assets 54,867 54,364 56,364 Total 88,814 91,449 101,152 (*) Of which EUR 35 million correspond to the amount of Multifamily loans of Santander Bank, National Association.
Financial assets at amortised cost, category
Loans And Advances To Customers Line Items
Schedule of changes in loss allowance and gross carrying amount	Millions of euros Stage 1 Stage 2 Stage 3 Total Loss allowance as of January 1, 2018 4,350 5,079 16,507 25,936 Transfers Transfer from Stage 2 to Stage 1 (1,173) 3,854 2,681 Transfer from Stage 3 to Stage 1 (279) 1,264 985 Transfer from Stage 3 to Stage 2 (1,971) 4,529 2,558 Transfer from Stage 1 to Stage 2 438 (1,656) (1,218) Transfer from Stage 2 to Stage 3 435 (1,264) (829) Transfer from Stage 1 to Stage 3 84 (173) (89) Net changes of the exposure and modifications in the credit risk 304 (961) 7,070 6,413 Write-offs — — (12,673) (12,673) FX and other movements (66) (37) (354) (457) Carrying amount as of December 31, 2018 3,658 4,743 14,906 23,307

Trading derivatives (Tables)

Trading derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Derivatives [Abstract]
Schedule of fair value of derivatives by type of risk hedged	Million of euros 2018 2017 2016 Notional Market Notional Market Notional Market amount value amount value amount value Trading derivatives: Interest rate risk Forward rate agreements 308,340 (1) 190,553 (15) 370,244 (64) Interest rate swaps 4,197,246 115 3,312,025 974 3,092,360 804 Options, futures and other derivatives 543,138 (514) 540,424 (511) 565,635 (980) Credit risk Credit default swaps 18,889 33 25,136 68 38,827 37 Foreign currency risk Foreign currency purchases and sales 275,449 301 236,805 (29) 259,336 1,102 Foreign currency options 54,215 2 43,488 (37) 36,965 112 Currency swaps 334,524 (416) 295,753 (1,628) 321,316 (3,627) Securities and commodities derivatives and other 59,932 1,078 70,325 529 76,523 290 Total 5,791,733 598 4,714,509 (649) 4,761,206 (2,326)

Non-current assets (Tables)

Non-current assets (Tables)	12 Months Ended
	Dec. 31, 2018
Non-current assets held for sale
Schedule of non-current assets	Million of euros 2018 2017 2016 Tangible assets 5,424 11,661 5,743 Of which: Foreclosed assets 5,334 11,566 5,640 Of which: property assets in Spain 4,488 10,533 4,902 Other tangible assets held for sale 90 95 103 Other assets (*) 2 3,619 29 Total (**) 5,426 15,280 5,772 (*) In 2017 include, mainly, Banco Popular Español, S.A.U. assets under the sale of the real estate business to Blackstone (see Note 3). (**) In March 2018, the agreement for the operation of Banco Popular Español, S.A.U. real estate business with Blackstone has materialised (see Note 3).

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2018
Investments
Summary of Investments by company	Million of euros 2018 2017 2016 Associated entities Project Quasar Investment 2017 S.L. 1,701 — — Merlin Properties, SOCIMI, S.A. 1,358 1,242 1,168 Metrovacesa, S.A. 1,255 — — Companies Zurich Santander 961 988 1,011 Testa Residencial, SOCIMI, S.A. — 651 307 Allianz Popular, S.L. 431 438 — Companies Santander Insurance 392 358 325 Other companies 511 520 431 6,609 4,197 3,242 Joint Ventures entities Wizink Bank, S.A. — — Unión de Créditos Inmobiliarios, S.A., EFC 202 207 177 Santander Generales Seguros y Reaseguros, S.A. y Santander Vida Seguros y Reaseguros, S.A. (former Aegon Santander Seguros) 163 186 197 SAM Investment Holdings Limited (*) — — 525 Other companies 614 577 695 979 1,987 1,594 (*) SAM Investment Holdings Limited became part of the Group in 2017.
Summary of Changes in Investments	Million of euros 2018 (*) 2017 2016 Balance at beginning of year 6,150 4,836 3,251 Acquisitions (disposals) of companies and capital increases (reductions) (1,761) 1,893 (72) Of which: Wizink Bank, S.A. (1,033) 1,017 — Allianz Popular, S.L. — 438 — Changes in the consolidation method (Note 3) 2,967 (582) 1,457 Of which: Quasar 1,701 — — Metrovacesa 1,255 — — Effect of equity accounting 737 704 444 Dividends paid and reimbursements of share premium (404) (376) (305) Exchange differences and other changes (101) (291) 61 Balance at end of year 7,588 6,184 4,836 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Summary of financial information on companies accounted for using the equity method	Million of euros 2018 2017 2016 Total assets 74,765 63,093 55,791 Total liabilities (58,153) (51,242) (45,623) Net assets 16,612 11,851 10,168 Group’s share of net assets 6,157 4,194 3,381 Goodwill 1,431 1,990 1,455 Of which: Companies Zurich Santander 526 526 526 Wizink Bank, S.A. — 553 — Allianz Popular, S.L. 347 347 — Companies Santander Insurance 205 205 205 Total Group share 7,588 6,184 4,836 Total income 12,174 12,536 11,766 Total profit 1,867 1,699 984 Group’s share of profit 737 704 444
Summary of financial information on the main associates and joint ventures	Million of euros Total assets Total liabilities Total income Total profit Joint Ventures entities 21,934 20,324 4,301 334 Of which: Unión de Créditos Inmobiliarios, S.A., EFC 12,105 11,701 351 7 Santander Generales Seguros y Reaseguros, S.A. y Santander Vida Seguros y Reaseguros, S.A. (former Aegon Santander Seguros) 132 84 122 15 Associated entities 52,831 37,829 7,873 1,533 Of which: Companies Santander Zurich 13,805 12,915 4,143 402 Allianz Popular, S.L. 3,238 3,028 113 113 Companies Santander Insurance 2,276 1,899 822 77 Total 74,765 58,153 12,174 1,867

Insurance contracts linked to_2

Insurance contracts linked to pensions (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of types of insurance contracts [abstract]
Schedule of insurance contracts linked to pensions	Million of euros 2018 2017 2016 Assets relating to insurance contracts covering post-employment benefit plan obligations: Banco Santander, S.A. 210 239 269 210 239 269

Liabilities and assets under _2

Liabilities and assets under insurance contracts and reinsurance assets (Tables)	12 Months Ended
	Dec. 31, 2018
Liabilities and Assets under insurance contracts and Reinsurance assets
Schedule of Liabilities under insurance contracts and Reinsurance assets in the consolidated balance sheets	Million of euros 2018 2017 2016 Direct Direct Direct insurance insurance insurance and Total and Total and Total reinsurance Reinsurance (balance reinsurance Reinsurance (balance reinsurance Reinsurance (balance Technical provisions for: assumed ceded payable) assumed ceded payable) assumed ceded payable) Unearned premiums and unexpired risks 52 (47) 5 50 (41) 9 61 (46) 15 Life insurance 227 (163) 64 483 (151) 332 159 (138) 21 Unearned premiums and risks 140 (127) 13 100 (96) 4 76 (76) — Mathematical provisions 87 (36) 51 383 (55) 328 83 (62) 21 Claims outstanding 397 (86) 311 423 (115) 308 358 (98) 260 Bonuses and rebates 20 (9) 11 29 (11) 18 19 (8) 11 Other technical provisions 69 (19) 50 132 (23) 109 55 (41) 14 765 (324) 441 1,117 (341) 776 652 (331) 321

Tangible assets (Tables)

Tangible assets (Tables)	12 Months Ended
	Dec. 31, 2018
Tangible assets
Changes in tangible assets in the consolidated balance sheets	Million of euros Leased out under an operating Investment For own use lease property Total Cost: Balances at January 1, 2016 17,442 14,921 7,345 39,708 Additions / disposals (net) due to change in the scope of consolidation (*) (17) 287 (4,278) (4,008) Additions / disposals (net) 763 2,380 (64) 3,079 Transfers, exchange differences and other items (76) 650 462 1,036 Balances at December 31, 2016 18,112 18,238 3,465 39,815 Additions / disposals (net) due to change in the scope of consolidation 1,740 205 — 1,945 Additions / disposals (net) 781 2,445 (100) 3,126 Transfers, exchange differences and other items (1,357) (2,215) (223) (3,795) Balances at December 31, 2017 19,276 18,673 3,142 41,091 Additions / disposals (net) due to change in the scope of consolidation 34 44 (630) (552) Additions / disposals (net) 589 5,545 (182) 5,952 Transfers, exchange differences and other items (1,164) 825 48 (291) Balances at December 31, 2018 18,735 25,087 2,378 46,200 Accumulated depreciation: Balances at January 1, 2016 (9,448) (3,376) (284) (13,108) Disposals due to change in the scope of consolidation 5 (3) 121 123 Disposals 311 457 29 797 Charge for the year (1,079) — (10) (1,089) Transfers, exchange differences and other items — (2,247) (53) (2,300) Balances at December 31, 2016 (10,211) (5,169) (197) (15,577) Disposals due to change in the scope of Consolidation — — — — Disposals 478 639 8 1,125 Charge for the year (1,165) — (25) (1,190) Transfers, exchange differences and other items (22) (1,574) 25 (1,571) Balances at December 31, 2017 (10,920) (6,104) (189) (17,213) Disposals due to change in the scope of consolidation (12) (34) — (46) Disposals 629 413 17 1,059 Charge for the year (1,159) — (13) (1,172) Transfers, exchange differences and other items 938 (2,679) (14) (1,755) Balances at December 31, 2018 (10,524) (8,404) (199) (19,127) Million of euros Leased out under an operating Investment For own use lease property Total Impairment losses: Balances at January 1, 2016 (45) (159) (1,076) (1,280) Impairment charge for the year (12) (43) (62) (117) Releases 1 1 60 62 Disposals due to change in the scope of Consolidation 1 — 309 310 Exchange differences and other 14 42 17 73 Balances at December 31, 2016 (41) (159) (752) (952) Impairment charge for the year (16) (42) (21) (79) Releases 4 — 3 7 Disposals due to change in the scope of Consolidation — (2) (1) (3) Exchange differences and other (24) 5 142 123 Balances at December 31, 2017 (77) (198) (629) (904) Impairment charge for the year (30) (56) (8) (94) Releases 6 — 5 11 Disposals due to change in the scope of Consolidation — — — — Exchange differences and other 40 15 16 71 Balances at December 31, 2018 (61) (239) (616) (916) Tangible assets, net: Balances at December 31, 2016 (*) 7,860 12,910 2,516 23,286 Balances at December 31, 2017 8,279 12,371 2,324 22,974 Balances at December 31, 2018 8,150 16,444 1,563 26,157 (*) The decreases in 2016 in Tangible assets - Investment property was due to the separation and deconsolidation of Metrovacesa, S.A. (See Note 3).
Property, plant and equipment for own use
Tangible assets
Detail by class of asset of property, plant and equipment -for own use in the consolidated balance sheets	Million of euros Accumulated Impairment Carrying Cost depreciation losses amount Land and buildings 5,713 (1,967) (41) 3,705 IT equipment and fixtures 5,225 (4,161) — 1,064 Furniture and vehicles 6,963 (4,023) — 2,940 Construction in progress and other items 211 (60) — 151 Balances at December 31, 2016 18,112 (10,211) (41) 7,860 Land and buildings 5,892 (2,014) (77) 3,801 IT equipment and fixtures 5,608 (4,422) — 1,186 Furniture and vehicles 7,213 (4,391) — 2,822 Construction in progress and other items 563 (93) — 470 Balances at December 31, 2017 19,276 (10,920) (77) 8,279 Land and buildings 6,127 (2,056) (61) 4,010 IT equipment and fixtures 5,605 (4,455) — 1,150 Furniture and vehicles 6,686 (3,946) — 2,740 Construction in progress and other items 317 (67) — 250 Balances at December 31, 2018 18,735 (10,524) (61) 8,150

Intangible assets - Goodwill (T

Intangible assets - Goodwill (Tables)	12 Months Ended
	Dec. 31, 2018
Intangible assets - Goodwill
Schedules of goodwill and changes in goodwill	The detail of goodwill, based on the cash-generating units giving rise thereto, is as follows: Million of euros 2018 2017 2016 Santander UK 8,307 8,375 8,679 Banco Santander (Brasil) 4,459 4,988 5,769 Santander Bank Polska 2,402 2,473 2,342 Santander Consumer USA 2,102 2,007 3,182 Santander Bank, National Association 1,793 1,712 1,948 Santander Consumer Germany 1,217 1,217 1,217 SAM Investment Holdings Limited 1,173 1,173 — Santander Portugal 1,040 1,040 1,040 Santander España (*) 1,023 648 371 Banco Santander - Chile 627 676 704 Santander Consumer Nordics 502 518 537 Grupo Financiero Santander (Mexico) 434 413 449 Other companies 387 529 486 Total goodwill 25,466 25,769 26,724 (*) Includes mainly goodwill arising from purchases of Popular's network and Wizink's card business. The changes in goodwill were as follows: Million of euros 2018 2017 2016 Balance at beginning of year 25,769 26,724 26,960 Additions (Note 3) 383 1,644 — Of which: SAM Investment Holdings Limited — 1,173 — Santander España 375 248 — Impairment losses — (899) (50) Of which: Santander Consumer USA — (799) — Disposals or changes in scope of consolidation (130) — (2) Exchange differences and other items (556) (1,700) (184) Balance at end of year 25,466 25,769 26,724
Schedule of goodwill assumptions	Nominal Projected Discount perpetual period rate (*) growth rate Santander UK 5 years 8.4 % 2.5 % Santander Consumer USA 3 years 11.1 % 1.5 % Santander Bank, National Association 3 years 10.6 % 3.8 % Santander Consumer Germany 5 years 8.5 % 2.5 % SAM Investment Holdings Limited 5 years 9.6 % 2.5 % Santander Portugal 5 years 9.6 % 2.0 % Santander Consumer Nordics 5 years 9.2 % 2.5 % (*) Post-tax discount rate.

Intangible assets - Other int_2

Intangible assets - Other intangible assets (Tables)	12 Months Ended
	Dec. 31, 2018
Intangible assets
Schedule of Other intangible assets	Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2017 disposals consolidation impairment impairment and other 2018 With indefinite useful life: Brand names 35 — — — — 1 36 With finite useful life: IT developments 3-7 years 6,945 1,468 1 — (1,102) (178) 7,134 Other 1,560 1 12 — (50) (13) 1,510 Accumulated amortisation (5,386) — (1) (1,253) 1,035 173 (5,432) Development (4,721) — (1) (1,153) 985 147 (4,743) Other (665) — — (100) 50 26 (689) Impairment losses (240) — — (117) 117 86 (154) Of which: addition — — — (118) — — — liberation — — — 1 — — — 2,914 1,469 12 (1,370) — 69 3,094 Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2016 disposals consolidation impairment impairment and other 2017 With indefinite useful life: Brand names 39 — — — — (4) 35 With finite useful life: IT developments 3-7 years 6,558 1,470 42 — (679) (446) 6,945 Other 1,245 68 436 — (126) (63) 1,560 Accumulated amortisation (4,848) — (64) (1,403) 694 235 (5,386) Development (4,240) — (14) (1,310) 627 216 (4,721) Other (608) — (50) (93) 67 19 (665) Impairment losses (297) — — (174) 111 120 (240) Of which: addition — — — (174) — — — 2,697 1,538 414 (1,577) — (158) 2,914 Million of euros Net Application of additions Change in Amortization amortization Exchange Estimated December 31, and scope of and and differences December 31, useful life 2015 disposals consolidation impairment impairment and other 2016 With indefinite useful life: Brand names 49 1 — — (11) — 39 With finite useful life: IT developments 3-7 years 5,411 1,726 — — (890) 311 6,558 Other 1,306 41 (124) — — 22 1,245 Accumulated amortisation (3,873) — — (1,275) 716 (416) (4,848) Development (3,353) — — (1,168) 716 (435) (4,240) Other (520) — — (107) — 19 (608) Impairment losses (423) — — (11) 185 (48) (297) Of which: addition — — — (11) — — — 2,470 1,768 (124) (1,286) — (131) 2,697

Other assets (Tables)

Other assets (Tables)	12 Months Ended
	Dec. 31, 2018
Other Assets Abstract
Schedule of other assets	Million of euros 2018 2017 2016 Transactions in transit 143 206 431 Net pension plan assets (Note 25) 1,015 604 521 Prepayments and accrued income 3,089 2,326 2,232 Other 4,744 4,427 3,878 8,991 7,563 7,062

Deposits from central banks a_2

Deposits from central banks and credit institutions (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits from central banks and credit institutions
Schedule of deposits from central banks and credit institutions	Million of euros 2018 2017 2016 CENTRAL BANKS Classification: Financial liabilities held for trading — 282 1,351 Financial liabilities designated at fair value through profit or loss 14,816 8,860 9,112 Financial liabilities at amortised cost 72,523 71,414 44,112 87,339 80,556 54,575 Type: Deposits on demand 5 5 5 Time deposits 82,797 78,801 46,278 Reverse repurchase agreements 4,537 1,750 8,292 87,339 80,556 54,575 CREDIT INSTITUTIONS Classification: Financial liabilities held for trading — 292 44 Financial liabilities designated at fair value through profit or loss 10,891 18,166 5,015 Financial liabilities at amortised cost 89,679 91,300 89,764 100,570 109,758 94,823 Type: Deposits on demand 6,154 6,444 4,220 Time deposits 53,421 54,159 61,321 Reverse repurchase agreements 40,873 49,049 29,277 Subordinated deposits 122 106 5 100,570 109,758 94,823 Currency: Euro 97,323 119,606 74,746 Pound sterling 19,301 14,820 12,237 US dollar 45,848 33,259 40,514 Brazilian real 18,657 16,485 16,537 Other currencies 6,780 6,144 5,364 TOTAL 187,909 190,314 149,398

Customer deposits (Tables)

Customer deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Customer deposits
Schedule of customer deposits	Million of euros 2018 2017 2016 Classification: Financial liabilities held for trading (*) — 28,179 9,996 Financial liabilities designated at fair value through profit or loss. 39,597 28,945 23,345 Financial liabilities at amortised cost 740,899 720,606 657,770 780,496 777,730 691,111 Geographical area: Spain 267,210 260,181 181,888 European Union (excluding Spain) 309,615 318,580 295,059 United States and Puerto Rico 53,843 50,771 63,429 Other OECD countries 67,462 62,980 62,761 Latin America (non-OECD) 82,343 84,752 87,519 Rest of the world 23 466 455 780,496 777,730 691,111 Type: Demand deposits- Current accounts 346,345 328,217 279,494 Savings accounts 196,493 189,845 180,611 Other demand deposits 5,873 7,010 7,156 Time deposits- Fixed-term deposits and other term deposits 195,540 195,285 176,581 Home-purchase savings accounts 40 45 50 Discount deposits 3 3 448 Hybrid financial liabilities 3,419 4,295 3,986 Subordinated liabilities 23 21 24 Repurchase agreements 32,760 53,009 42,761 780,496 777,730 691,111 (*) The decrease reflects the run-down of UK's trading business due to the banking reform (Ring-fencing).

Marketable debt securities (Tab

Marketable debt securities (Tables)	12 Months Ended
	Dec. 31, 2018
Marketable Debt Securities [Abstract]
Schedule of marketable securities	Million of euros 2018 2017 2016 Classification: Financial liabilities held for trading — — — Financial liabilities designated at fair value through profit or loss 2,305 3,056 2,791 Financial liabilities at amortised cost 244,314 214,910 226,078 246,619 217,966 228,869 Type: Bonds and debentures outstanding 195,498 176,719 183,278 Subordinated 23,676 21,382 19,873 Notes and other securities 27,445 19,865 25,718 246,619 217,966 228,869
Maturity of subordinated liabilities and debentures	Million of euros Within 1 year 1 to 3 years 3 to 5 years More than 5 years Total Subordinated Liabilities 580 129 1,341 21,626 23,676 Covered bonds 16,009 29,105 12,287 28,035 85,436 Other bonds and debentures 21,492 41,858 24,873 21,839 110,062 Total bonds and debentures outstanding 37,501 70,963 37,160 49,874 195,498 Total bonds and debentures outstanding and subordinated liabilities 38,081 71,092 38,501 71,500 219,174
Detail, by currency of issue, of bonds and debentures outstanding	December 31, 2018 Outstanding issue amount in foreign Annual Million of euros currency interest Currency of issue 2018 2017 2016 (Million) rate (%) Euro 85,479 83,321 77,231 85,479 1.25 % US dollar 62,021 48,688 48,134 71,014 3.14 % Pound sterling 16,616 13,279 15,098 14,864 2.40 % Brazilian real 15,778 17,309 27,152 70,117 5.53 % Chilean peso 6,460 5,876 6,592 5,133,310 5.00 % Other currencies 9,144 8,246 9,070 Balance at end of year 195,498 176,719 183,278
Changes in Bonds and debentures outstanding	Million of euros 2018 2017 2016 Balance at beginning of year 176,719 183,278 182,073 Net inclusion of entities in the Group — 11,426 1,009 Of which: Banco Santander, S.A. (Group Banco Popular) — 11,426 — Banca PSA Italia S.p.a. — — 500 PSA Bank Deutschland GmbH — — 497 Issues 68,306 62,260 57,012 Of which: Banco Santander (Brasil) S.A. 16,422 16,732 7,699 Santander Consumer USA Holdings Inc. 15,627 11,242 11,699 Grupo Santander UK 14,984 7,625 12,815 Banco Santander, S.A. (*) 7,683 10,712 6,385 Santander Consumer Finance, S.A. 3,605 2,508 4,567 Banco Santander - Chile. 1,483 579 3,363 Santander Consumer Bank A.S. 1,342 1,117 1,537 Santander Holdings USA, Inc. 1,210 4,133 2,798 PSA Banque France 716 1,032 — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 560 118 1,840 Santander Consumer Bank AG — 749 — PSA Financial Services Spain, EFC, SA — — 726 SCF Rahoituspalvelut KIMI VI DAC — 635 — Auto ABS French Lease Master Compartiment 2016 — — 635 Banco Santander Totta, S.A. — 1,999 — Redemptions and repurchases (48,319) (66,871) (59,036) Of which: Banco Santander (Brasil) S.A. (14,802) (23,187) (7,579) Santander Consumer USA Holdings Inc. (11,939) (10,264) (11,166) Santander Group UK (6,800) (13,303) (13,163) Banco Santander, S.A. (*) (4,752) (9,956) (12,837) Santander Consumer Finance, S.A. (2,366) (1,618) (4,117) Santander Consumer Bank AS (1,268) (337) (710) Santander Holdings USA, Inc. (903) (759) (1,786) Banca PSA Italia S.p.A. (600) — — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México (579) (224) (1,453) Santander International Products, Plc. (491) (310) (332) Banco Santander- Chile (204) (1,442) (516) Banco Santander Totta, S.A. (41) (998) (856) Santander Bank, National Association — (886) — Exchange differences and other movements (1,208) (13,374) 2,219 Balance at year-end 195,498 176,719 183,278 (*) As of December 31, 2017 and 2016, issuer entities were included.
Information on liabilities secured by financial assets	Million of euros 2018 2017 2016 Asset-backed securities 38,140 32,505 38,825 Of which, mortgage-backed securities 5,197 4,034 8,561 Other mortgage securities 46,026 52,497 44,616 Of which: mortgage-backed bonds 22,023 23,907 16,965 Territorial covered bond 1,270 1,270 592 85,436 86,272 84,033
Information required by Bank of Spain	2018 2017 2016 Face value of the outstanding mortgage loans and credits that support the issuance of mortgage-backed and mortgage bonds pursuant to Royal Decree 716/2009 (excluding securitised bonds) 85,610 91,094 56,871 Of which: Loans eligible to cover issues of mortgage-backed securities 60,195 59,422 38,426 Transfers of assets retained on balance sheet: mortgage-backed certificates and other securitised mortgage assets 15,807 18,202 19,509

Subordinated liabilities (Table

Subordinated liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Subordinated Liabilities [Abstract]
Schedule of subordinated liabilities detail, by currency of issue	Million of euros December 31, 2018 Outstanding issue amount in foreign Annual currency interest Currency of issue 2018 2017 2016 (million) rate (%) Euro 14,001 11,240 8,044 14,001 3.89 % US dollar 7,813 8,008 9,349 8,946 5.30 % Pound sterling 628 874 949 562 8.92 % Brazilian real — 131 136 — — Other currencies 1,378 1,257 1,424 Balance at end of year 23,820 21,510 19,902 Of which, preference shares 345 404 413 Of which, preference participations 9,717 8,369 6,916
Schedule of changes in subordinated liabilities	Million of euros 2018 2017 2016 Balance at beginning of year 21,510 19,902 21,153 Net inclusion of entities in the Group (Note 3) — 11 — Of which: Banco Santander, S.A. (Grupo Banco Popular) — 11 — Placements 3,283 2,994 2,395 Of which: Banco Santander, S.A. (*) 2,750 2,894 2,328 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 281 — 59 Santander Bank Polska S.A. 235 — — PSA Banque France — 78 — Net redemptions and repurchases (**) (1,259) (870) (2,812) Of which: Banco Santander, S.A. (*) (401) (453) (1,976) Santander UK plc (313) (60) (51) Santander Holdings USA, Inc. (195) (72) — Santander Bank, National Association (163) (285) — Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México (125) — — Banco Santander (Brasil) S.A. (62) — (716) Santander Consumer Finance, S.A. — — (70) Exchange differences and other movements 286 (527) (834) Balance at end of year 23,820 21,510 19,902 (*) As of December 31, 2017 and 2016, issuer entities were included. (**) The balance relating to issuances, redemptions and repurchases (EUR 2,024 million), together with the interest paid in remuneration of these issuances including PPCC (EUR 1,245 million), is included in the cash flow from financing activities.

Other financial liabilities (Ta

Other financial liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Other Financial Liabilities [Abstract]
Schedule of other financial liabilities	Million of euros 2018 2017 2016 Trade payables 1,323 1,559 1,230 Clearing houses 434 767 676 Tax collection accounts: Public Institutions 3,968 3,212 2,790 Factoring accounts payable 263 290 180 Unsettled financial transactions 3,373 6,375 7,418 Other financial liabilities 15,303 16,225 14,222 24,664 28,428 26,516

Provisions (Tables)

Provisions (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of subsidiaries [line items]
Schedule of details of provisions in the consolidated balance sheet	Million of euros 2018 2017 2016 Provision for pensions and other obligations post-employments 5,558 6,345 6,576 Other long term employee benefits 1,239 1,686 1,712 Provisions for taxes and other legal contingencies 3,174 3,181 2,994 Provisions for contingent liabilities and commitments (Note 2) 779 617 459 Other provisions 2,475 2,660 2,718 Provisions 13,225 14,489 14,459
Schedule of changes in provision in the last three years	Million of euros 2018 2017 2016 Provisions Provisions Provisions Provisions Provisions Provisions Provisions for other for Provisions for other for Provisions for other for for post- long term contingent for post- long term commitments for post- long term commitments employment employee liabilities and Other employment employee and guarantees Other employment employee and guarantees Other plans benefits commitments (*) provisions Total plans benefits given provisions Total plans benefits given provisions Total Balances at beginning of year 6,345 1,686 814 5,841 14,686 6,576 1,712 459 5,712 14,459 6,356 1,916 618 5,604 14,494 Incorporation of Group companies, net — — — (30) (30) 59 184 146 1,365 1,754 11 8 (4) 13 28 Additions charged to income: 38 251 (49) 2,253 2,493 237 293 (49) 2,863 3,344 227 368 (40) 2,235 2,790 Interest expense(Note 39) 165 21 — — 186 175 23 — — 198 170 31 — — 201 Personnel expenses (Note 47) 78 6 — — 84 82 6 — — 88 73 8 — — 81 Provisions or reversion of provisions (205) 224 (49) 2,253 2,223 (20) 264 (49) 2,863 3,058 (16) 329 (40) 2,235 2,508 Addition 7 227 455 4,612 5,301 2 264 606 3,855 4,727 24 377 226 3,024 3,651 Release (212) (3) (504) (2,359) (3,078) (22) — (655) (992) (1,669) (40) (48) (266) (789) (1,143) Other additions arising from insurance contracts linked to pensions (7) — — — (7) (7) — — — (7) (3) — — — (3) Changes in value recognised in equity (482) — — — (482) 369 — — — 369 1,275 — — — 1,275 Payments to pensioners and pre-retirees with a charge to internal provisions (332) (625) — — (957) (355) (498) — — (853) (367) (603) — — (970) Benefits paid due to settlements — — — — — (260) — — — (260) (20) — — — (20) Insurance premiums paid (2) — — — (2) — — — — — (1) — — — (1) Payments to external funds (368) — — — (368) (273) — — — (273) (852) — — — (852) Amounts used — — (3) (2,548) (2,551) — — (3) (2,997) (3,000) — — (2) (2,149) (2,151) Transfer, exchange differences and other changes 366 (73) 17 133 443 (1) (5) 64 (1,102) (1,044) (50) 23 (113) 9 (131) Balances at end of year 5,558 1,239 779 5,649 13,225 6,345 1,686 617 5,841 14,489 6,576 1,712 459 5,712 14,459 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of provision for pensions and similar obligations	Million of euros 2018 2017 2016 Provisions for post-employment plans - Spanish entities 3,930 4,274 4,701 Provisions for other similar obligations - Spanish entities 1,189 1,643 1,664 Of which: pre-retirements 1,172 1,630 1,644 Provisions for post-employment plans - United Kingdom 130 323 306 Provisions for post-employment plans - Other subsidiaries 1,498 1,748 1,569 Provisions for other similar obligations - Other subsidiaries 50 43 48 Provision for pensions and other obligations post -employments and Other long term employee benefits 6,797 8,031 8,288 Of which: defined benefits 6,791 8,026 8,277
Other combined provisions
Disclosure of subsidiaries [line items]
Schedule of other provisions by geographical area and by type of provision	Million of euros 2018 2017 2016 Recognised by Spanish companies 1,647 1,666 1,148 Recognised by other EU companies 1,044 1,127 1,300 Recognised by other companies 2,958 3,048 3,264 Of which: Brazil 2,496 2,504 2,715 5,649 5,841 5,712 Set forth below is the detail, by type of provision, of the balance at December 31, 2018, 2017 and 2016 of Provisions for taxes and other legal contingencies and Other provisions. The types of provision were determined by grouping together items of a similar nature: Million of euros 2018 2017 2016 Provisions for taxes 864 1,006 1,074 Provisions for employment-related proceedings (Brazil) 859 868 915 Provisions for other legal proceedings 1,451 1,307 1,005 Provision for customer remediation 652 885 685 Regulatory framework-related provisions 105 101 253 Provision for restructuring 492 360 472 Other 1,226 1,314 1,308 5,649 5,841 5,712
SPAIN
Disclosure of subsidiaries [line items]
Schedule of actuarial assumptions used to calculate defined benefit obligations	Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Annual discount rate 1.55% 1.40% and 1.38% B. Popular 1.50% 1.55% 1.40% 1.50% Mortality tables PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 PERM/F-2000 Cumulative annual CPI growth 1.00% 1.00% 1.00% 1.00% 1.00% 1.00% Annual salary increase rate 2.0%(*) B. Popular 1.75% in 2018 and Rest 2.00% (*) N/A N/A N/A Annual social security pension increase rate 1.00% 1.00% 1.00% N/A N/A N/A Annual benefit increase rate N/A N/A N/A From 0% to 1.50% From 0% to 1.50% From 0% to 1.50% (*) Corresponds to the Group’s defined-benefit obligations.
Disclosure of expected rate of return assumptions	Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Expected rate of return on plan assets 1.55 % 1.40 % 1.50 % 1.55 % 1.40 % N/A Expected rate of return on reimbursement rights 1.55 % 1.40 % 1.50 % N/A N/A N/A
Schedule of funding status of the defined benefit obligations	Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2015 2014 2018 2017 2016 2015 2014 Present value of the obligations: To current employees 60 138 50 48 62 — — — — — Vested obligations to retired employees 5,332 5,662 4,423 4,551 4,708 — — — — — To pre-retirees employees — — — — — 1,187 1,647 1,644 1,801 2,220 Long-service bonuses and other benefits — — — — — 17 13 13 12 13 Other 35 112 383 380 307 — — — — 4 5,427 5,912 4,856 4,979 5,077 1,204 1,660 1,657 1,813 2,237 Less - Fair value of plan assets 1,500 1,640 157 157 167 15 17 — — — Provisions - Provisions for pensions 3,927 4,272 4,699 4,822 4,910 1,189 1,643 1,657 1,813 2,237 Of which: Internal provisions for pensions 3,720 4,036 4,432 4,524 4,565 1,189 1,642 1,657 1,813 2,237 Insurance contracts linked to pensions (Note 14) 210 238 269 299 345 — 1 — — — Unrecognised net assets for pensions (3) (2) (2) (1) — — — — — —
Schedule of defined benefit obligation expenses recognized in the consolidated income statements	Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Current service cost 18 16 11 1 1 1 Interest cost (net) 73 79 91 18 21 27 Expected return on insurance contracts linked to pensions (4) (4) (5) — — — Provisions or reversion of provisions Actuarial (gains)/losses recognised in the year — — — 7 13 6 Past service cost 3 — 6 5 — — Pre-retirement cost 1 — 6 208 248 355 Other (4) (2) (21) — — (1) 87 89 88 239 283 388
Schedule of status and changes of the defined benefit obligations	Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Present value of the obligations at beginning of year 5,912 4,856 4,979 1,660 1,657 1,813 Incorporation of Group companies, net (36) 1,563 — — 202 — Current service cost 18 16 11 1 1 1 Interest cost 99 94 95 18 21 27 Pre-retirement cost 1 — 6 208 248 355 Effect of curtailment/settlement (4) (2) (21) — — — Benefits paid (423) (388) (353) (617) (490) (570) Benefits paid due to settlements — (260) — — — — Past service cost 3 — 6 5 — — Actuarial (gains)/losses (145) 57 136 6 13 6 Demographic actuarial (gains)/losses (21) (7) 15 (3) 10 (1) Financial actuarial (gains)/losses (124) 64 121 9 3 7 Exchange differences and other items 2 (24) (3) (77) 8 25 Present value of the obligations at end of year 5,427 5,912 4,856 1,204 1,660 1,657
Schedule of changes in fair value of plan assets	Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Fair value of plan assets at beginning of year 1,640 157 157 17 — — Incorporation of Group companies, net — 1,507 — — 18 — Expected return on plan assets 26 15 4 — — — Benefits paid (115) (58) (8) (2) (1) — Contributions/(surrenders) 21 3 9 — — — Actuarial gains/(losses) (73) 24 (2) (1) — — Exchange differences and other items 1 (8) (3) 1 — — Fair value of plan assets at end of year 1,500 1,640 157 15 17 —
Schedule of insurance contracts linked to pensions	Million of euros Post-employment plans Other similar obligations 2018 2017 2016 2018 2017 2016 Fair value of insurance contracts linked to pensions at beginning of year 238 269 299 1 — — Incorporation of Group companies, net — — — — 2 — Expected return on insurance contracts linked to pensions 4 4 5 — — — Benefits paid (27) (29) (32) (1) (1) — Paid premiums 2 1 — — — — Actuarial gains/(losses) (7) (7) (3) — — — Fair value of insurance contracts linked to pensions at end of year 210 238 269 — 1 —
Schedule of maturity of estimated benefits payments	Million of euros 2019 792 2020 662 2021 569 2022 486 2023 425 2024 to 2028 1,604
UK
Disclosure of subsidiaries [line items]
Schedule of actuarial assumptions used to calculate defined benefit obligations	2018 2017 2016 Annual discount rate 2.90 % 2.49 % 2.79 % Mortality tables 108/86 S2 Light 108/86 S2 Light 116/98 S1 Light TMC Cumulative annual CPI growth 3.22 % 3.15 % 3.12 % Annual salary increase rate 1.00 % 1.00 % 1.00 % Annual pension increase rate 2.94 % 2.94 % 2.92 %
Schedule of funding status of the defined benefit obligations	Million of euros 2018 2017 2016 2015 2014 Present value of the obligations 12,079 13,056 12,955 12,271 11,959 Less- Fair value of plan assets 12,887 13,239 13,118 12,880 12,108 Provisions - Provisions for pensions (808) (183) (163) (609) (149) Of which: Internal provisions for pensions 130 323 306 150 256 Net assets for pensions (938) (506) (469) (759) (405)
Schedule of defined benefit obligation expenses recognized in the consolidated income statements	Million of euros 2018 2017 2016 Current service cost 31 36 31 Interest cost (net) (6) (6) (22) 25 30 9
Schedule of status and changes of the defined benefit obligations	Million of euros 2018 2017 2016 Present value of the obligations at beginning of year 13,056 12,955 12,271 Current service cost 31 36 31 Interest cost 320 347 407 Benefits paid (489) (445) (332) Contributions made by employees 24 20 20 Past service cost — — — Actuarial (gains)/losses (766) 602 2,315 Demographic actuarial (gains)/losses (21) (184) (59) Financial actuarial (gains)/losses (745) 786 2,374 Exchange differences and other items (97) (459) (1,757) Present value of the obligations at end of year 12,079 13,056 12,955
Schedule of changes in fair value of plan assets	Million of euros 2018 2017 2016 Fair value of plan assets at beginning of year 13,239 13,118 12,880 Expected return on plan assets 326 353 429 Benefits paid (489) (445) (332) Contributions 209 208 304 Actuarial gains/(losses) (285) 481 1,694 Exchange differences and other items (113) (476) (1,857) Fair value of plan assets at end of year 12,887 13,239 13,118
Schedule of main categories of plan assets	2018 2017 2016 Equity instruments 17 % 20 % 25 % Debt instruments 50 % 46 % 49 % Properties 10 % 13 % 12 % Other 23 % 21 % 14 %
UK | Provisions For Pensions And Similar Obligations Member
Disclosure of subsidiaries [line items]
Schedule of other provisions by geographical area and by type of provision	Million of euros 2019 297 2020 301 2021 321 2022 345 2023 363 2024 to 2028 2,127
Other Foreign Countries
Disclosure of subsidiaries [line items]
Schedule of provision for pensions and similar obligations	Million of euros Of which: business in 2018 Brazil 2017 2016 2015 2014 Present value of the obligations 9,116 6,649 9,534 9,876 8,337 10,324 Less- Of which: with a charge to the participants 167 167 193 153 133 151 Fair value of plan assets 7,743 6,046 7,927 8,445 7,008 8,458 Provisions - Provisions for pensions 1,206 436 1,414 1,278 1,196 1,715 Of which: Internal provisions for pensions 1,541 756 1,787 1,613 1,478 1,999 Net assets for pensions (77) (62) (98) (52) (28) (8) Unrecognised net assets for pensions (258) (258) (275) (283) (254) (276)
Schedule of defined benefit obligation expenses recognized in the consolidated income statements	Million of euros 2018 2017 2016 Current service cost 34 35 38 Interest cost (net) 101 104 105 Provisions or reversion of provisions Actuarial (gains)/losses recognised in the year 5 1 (9) Past service cost 3 3 18 Pre-retirement cost (6) — (9) Other (19) (37) (66) 124 106
Schedule of status and changes of the defined benefit obligations	Million of euros 2018 2017 2016 Present value of the obligations at beginning of year 9,534 9,876 8,337 Incorporation of Group companies, net 36 165 171 Current service cost 34 35 38 Interest cost 646 807 802 Pre-retirement cost (6) — (9) Effect of curtailment/settlement (199) (19) (37) Benefits paid (634) (716) (690) Benefits paid due to settlements — (24) (1,352) Contributions made by employees 5 6 8 Past service cost 3 3 18 Actuarial (gains)/losses 390 404 1,269 Demographic actuarial (gains)/losses (59) (140) 439 Financial actuarial (gains)/losses 449 544 830 Exchange differences and other items (693) (1,003) 1,321 Present value of the obligations at end of year 9,116 9,534 9,876
Schedule of changes in fair value of plan assets	Million of euros 2018 2017 2016 Fair value of plan assets at beginning of year 7,927 8,445 7,008 Incorporation of Group companies, net — 166 154 Expected return on plan assets 573 732 732 Benefits paid (602) (683) (637) Benefits paid due to settlements — (24) (1,328) Contributions 199 94 559 Liquidation gains/(losses) — — — Actuarial gains/(losses) 308 203 687 Exchange differences and other items (662) (1,006) 1,270 Fair value of plan assets at end of year 7,743 7,927 8,445
Schedule of maturity of estimated benefits payments	Million of euros 2019 593 2020 603 2021 612 2022 629 2023 644 2024 to 2028 3,429
Schedule of main categories of plan assets	2018 2017 2016 Equity instruments 7 % 6 % 7 % Debt instruments 83 % 84 % 88 % Properties 1 % 3 % 1 % Other 9 % 7 % 4 %

Other liabilities (Tables)

Other liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Miscellaneous liabilities [abstract]
Schedule of other liabilities	Million of euros 2018 2017 2016 Transactions in transit 803 811 994 Accrued expenses and deferred income 6,621 6,790 6,507 Other 5,664 4,990 3,569 13,088 12,591 11,070

Tax matters (Tables)

Tax matters (Tables)	12 Months Ended
	Dec. 31, 2018
Tax matters
Schedule of reconciliation of income tax expense	Million of euros 2018 2017 2016 Consolidated profit (loss) before tax: From continuing operations 14,201 12,091 10,768 From discontinued operations — — — 14,201 12,091 10,768 Income tax at tax rate applicable in Spain (30%) 4,260 3,628 3,230 By the effect of application of the various tax rates applicable in each country (*) 509 539 312 Of which: Brazil 719 656 396 United Kingdom (99) (78) (63) United States (57) 68 94 Chile (35) (48) (54) Effect of profit or loss of associates and joint ventures (221) (211) (133) Effect of deduction of goodwill in Brazil — (164) (184) Effect of reassessment of deferred taxes — (282) (20) Permanent differences (**) 338 374 77 Current income tax 4,886 3,884 3,282 Effective tax rate 34.40 % 32.12 % 30.48 % Of which: Continuing operations 4,886 3,884 3,282 Discontinued operations (Note 37) — — — Of which: Current taxes 4,763 3,777 1,493 Deferred taxes 123 107 1,789 Taxes paid in the year 3,342 4,137 2,872 (*) (**)
Schedule of tax recognized in equity	Million of euros 2018 (*) 2017 2016 Other comprehensive income Items not reclassified to profit or loss (225) 60 364 Actuarial gains or (-) losses on defined benefit pension plans (199) 60 364 Changes in the fair value of equity instruments measured at fair value through other comprehensive income — — Financial liabilities at fair value with changes in results attributed to changes in credit risk (26) — Items that may be reclassified to profit or loss 124 — (694) Cash flow hedges (50) 108 (136) Changes in the fair value of debt instruments through other comprehensive income 167 — Financial assets available for sale — (97) (552) Debt instruments — (366) (368) Equity instruments — 269 (184) Other recognised income and expense of investments in subsidiaries, joint ventures and associates 7 (11) (6) Total (101) 60 (330) (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of deferred tax assets and liabilities	Million of euros 2018 2017 2016 Monetizable Monetizable Monetizable (*)(**) Other (*)(**) Other (*) Other Tax assets: 10,866 12,392 11,046 12,164 9,649 11,615 Tax losses and tax credits — 4,276 — 4,457 — 4,934 Temporary differences 10,866 8,116 11,046 7,707 9,649 6,681 Of which: Non-deductible provisions — 2,613 — 2,336 — 1,645 Valuation of financial instruments — 609 — 530 — 1,042 Loan losses 7,279 1,308 7,461 1,159 6,082 940 Pensions 3,587 632 3,585 723 3,567 641 Valuation of tangible and intangible assets — 1,215 — 1,077 — 537 Tax liabilities: — 5,568 — 4,837 — 5,694 Temporary differences — 5,568 — 4,837 — 5,694 Of which: Valuation of financial instruments — 1,168 — 1,207 — 1,105 Valuation of tangible and intangible assets — 1,503 — 1,256 — 1,916 Investments in Group companies — 880 — 808 — 1,265 (*) Not deductible from regulatory capital. (**) Banco Popular Español, S.A.U. requested the conversion of part of its monetizable assets in 2017 (EUR 486 million which were approved in 2018) and in 2018 (EUR 995 million pending resolution) given the circumstances of the aforementioned regulations are applied.
Schedule of changes in deferred tax assets and liabilities	Million of euros Foreign IFRS9 currency Adoption balance (Charge)/Credit impact translation to asset and Balances at (Balance at differences liability Acquisition Balances at December 31, 1 January (Charge)/ and other valuation for the year December 31, 2017 2018 Credit to income items adjustments (net) 2018 Deferred tax assets 23,210 680 241 (807) 149 (215) 23,258 Tax losses and tax credits 4,457 — (128) 1 — (54) 4,276 Temporary differences 18,753 680 369 (808) 149 (161) 18,982 Of which: monetizable 11,046 273 390 (843) — — 10,866 Deferred tax liabilities (4,837) — (364) (114) (315) 62 (5,568) Temporary differences (4,837) — (364) (114) (315) 62 (5,568) 18,373 680 (123) (921) (166) (153) 17,690 Million of euros Foreign currency balance (Charge)/Credit translation to asset and Balances at differences liability Acquisitions Balances at December 31, (Charge)/Credit and other valuation for the year December 31, 2016 to income items adjustments (net) 2017 Deferred tax assets 21,264 (675) (756) (1) 3,378 23,210 Tax losses and tax credits 4,934 (279) (205) — 7 4,457 Temporary differences 16,330 (396) (551) (1) 3,371 18,753 Of which: monetizable 9,649 (185) (455) — 2,037 11,046 Deferred tax liabilities (5,694) 568 414 19 (144) (4,837) Temporary differences (5,694) 568 414 19 (144) (4,837) 15,570 (107) (342) 18 3,234 18,373 Million of euros Foreign currency balance (Charge)/Credit translation to asset and Balances at differences liability Acquisitions Balances at December 31, (Charge)/Credit and other valuation for the year December 31, 2015 to income items adjustments (net) 2016 Deferred tax assets 22,045 (1,311) 1,355 (551) (274) 21,264 Tax losses and tax credits 4,808 194 110 — (178) 4,934 Temporary differences 17,237 (1,505) 1,245 (551) (96) 16,330 Of which: monetizable 8,887 49 713 — — 9,649 Deferred tax liabilities (5,565) (478) 98 (26) 277 (5,694) Temporary differences (5,565) (478) 98 (26) 277 (5,694) 16,480 (1,789) 1,453 (577) 3 15,570

Non-controlling interests (Tabl

Non-controlling interests (Tables)	12 Months Ended
	Dec. 31, 2018
Non-controlling interests Abstract
Schedule of detail, by Group company, of Equity - Non-controlling interests	Million of euros 2018 2017 2016 Santander Consumer USA Holdings Inc. 1,652 1,479 1,963 Santander Bank Polska S.A. 1,538 1,901 1,653 Grupo PSA 1,409 1,305 1,149 Banco Santander (Brasil) S.A. 1,114 1,489 1,784 Banco Santander México, S.A. Institución de Banca Múltiple, Grupo Financiero Santander México 1,093 1,056 1,069 Banco Santander - Chile 1,085 1,209 1,204 Grupo Metrovacesa — 836 449 Other companies (*) 1,493 1,481 1,208 9,384 10,756 10,479 Profit/(Loss) for the year attributable to non-controlling interests 1,505 1,588 1,282 Of which: Banco Santander (Brasil) S.A. 292 288 194 Banco Santander - Chile 279 264 215 Grupo PSA 232 206 171 Santander Consumer USA Holdings Inc. 218 368 256 Banco Santander México, S.A. Institución de Banca Múltiple, Grupo Financiero Santander México 216 194 190 Santander Bank Polska S.A. 173 160 148 Other companies 95 108 108 10,889 12,344 11,761 (*) Includes a Santander UK plc issuance of perpetual equity instruments of EUR 1,280 million in 2018 (EUR 1,290 million and EUR 753 million in 2017 and 2016, respectively).
Schedule of changes in Non-controlling interests	Million of euros 2018 (*) 2017 2016 Balance at the end of the previous year 12,344 11,761 10,713 Effect of changes in accounting policies (**) (1,292) — — Balance at beginning of year 11,052 11,761 10,713 Other comprehensive income (109) (583) 374 Exchange differences (135) (653) 360 Cash flow hedge (1) (11) 45 Available for sale equity — (2) (30) Available for sale fixed income — 71 38 Changes in the fair value of equity instruments (12) — — Changes in the fair value of debt instruments 40 — — Other (1) 12 (39) Other (54) 1,166 674 Profit attributable to non-controlling interests 1,505 1,588 1,282 Modification of participation rates (65) (819) (28) Change of perimeter (660) (39) (197) Dividends paid to minority shareholders (687) (665) (800) Changes in capital and others concepts (147) 1,101 417 Balance at end of year 10,889 12,344 11,761 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) See change in consolidated statements of changes in total equity.
Schedule of financial information on the subsidiaries with significant non-controlling interests	Million of euros (*) Grupo Banco Financiero Santander Santander Banco Santander Santander Consumer (Brasil) Santander - México, Bank USA S.A. (Chile), S.A. S.A.B. de C.V. Polska S.A. Holdings Inc. Total assets 166,036 50,911 65,876 43,669 38,526 Total liabilities 150,760 46,035 60,507 38,736 32,340 Net assets 15,276 4,876 5,369 4,933 6,186 Total income 13,345 2,535 3,527 1,488 4,215 Total profit 2,940 901 975 424 710 (*) Information prepared in accordance with the segment reporting criteria described in Note 52 and, therefore, it may not coincide with the information published separately by each entity.

Other comprehensive income (Tab

Other comprehensive income (Tables)	12 Months Ended
	Dec. 31, 2018
Other comprehensive income by item
Schedule of other comprehensive income components	Million of euros 12-31-2018 12-31-2017 12-31-2016 (IFRS9) (*) (IAS39) (IAS39) Other comprehensive income (22,141) (21,776) (15,039) Items that will not be reclassified to profit or loss (2,936) (4,034) (3,933) Actuarial gains and losses on defined benefit pension plans (3,609) (4,033) (3,931) Non-current assets held for sale — — — Share in other income and expenses recognised in investments, joint ventures and associates 1 (1) (2) Other valuation adjustments — — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income 597 Inefficiency of fair value hedges of equity instruments measured at fair value with changes in other comprehensive income — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedged item) — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedging instrument) — Changes in the fair value of financial liabilities measured at fair value through profit or loss attributable to changes in credit risk 75 Items that may be reclassified to profit or loss (19,205) (17,742) (11,106) Hedges of net investments in foreign operations (effective portion) (4,312) (4,311) (4,925) Exchange differences (15,730) (15,430) (8,070) Hedging derivatives (effective portion) 277 152 469 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income 828 Hedging instruments (items not designated) — Financial assets available for sale 2,068 1,571 Debt instruments 1,154 423 Equity instruments 914 1,148 Non-current assets held for sale — — — Share in other income and expenses recognised in investments, joint ventures and associates (268) (221) (151) (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of changes in fair value of equity instruments that will not be reclassified	Million of euros 12-31-18 (*) Capital gains by Capital losses by Net gains/losses by Fair value Equity instruments Domestic Spain 20 (216) (196) 417 International Rest of Europe 160 (76) 84 652 United States 9 — 9 42 Latin America and rest 708 (8) 700 1,560 897 (300) 597 2,671 Of which: Publicly listed 818 (18) 800 1,943 Non publicly listed 79 (282) (203) 728 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of exchange differences included in other comprehensive income that may be reclassified to profit or loss	Million of euros 2018 2017 2016 Net balance at end of year (20,042) (19,741) (12,995) Of which: Brazilian Real (12,950) (11,056) (8,435) Pound Sterling (3,924) (3,732) (2,996) Mexican Peso (2,312) (2,230) (1,908) Argentine Peso(*) - (1,684) (1,309) Chilean Peso (1,238) (866) (614) US Dollar 1,330 555 2,849 Other (948) (728) (582) (*) In 2018, due to the application of IAS29 for hyperinflationary economies, they have been transferred to Other Reserves (see Note 33).
Schedule of other comprehensive income, that may be reclassified to profit or loss, by type of instrument and geographical origin of the issuer	Million of euros December 31, 2018 (*) December 31, 2017 December 31, 2016 Net Net Net revaluation revaluation revaluation Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair gains losses (losses) value gains losses (losses) value gains losses (losses) value Debt instruments Government debt securities and debt Instruments issued by central banks Spain 326 (3) 323 38,550 660 (25) 635 48,217 610 (26) 584 32,729 Rest of Europe 373 (55) 318 17,494 306 (24) 282 20,244 50 (170) (120) 16,879 Latin America and rest of the world 448 (117) 331 42,599 404 (129) 275 39,132 167 (163) 4 35,996 Private-sector debt securities 37 (178) (141) 19,777 90 (128) (38) 20,888 117 (162) (45) 25,683 1,184 (353) 831 118,420 1,460 (306) 1,154 128,481 944 (521) 423 111,287 Equity instruments Domestic — — — — — — — — — — — — Spain International — — — — 5 (2) 3 1,373 48 (5) 43 1,309 Rest of Europe — — — — 166 (2) 164 979 284 (4) 280 1,016 United States — — — — 14 (5) 9 560 21 — 21 772 Latin America and rest of the world — — — — 744 (6) 738 1,878 811 (7) 804 2,390 — — — — 929 (15) 914 4,790 1,164 (16) 1,148 5,487 Of which: Listed — — — — 828 (5) 823 2,900 999 (11) 988 3,200 Unlisted — — — — 101 (10) 91 1,890 165 (5) 160 2,287 — — — — 2,389 (321) 2,068 133,271 2,108 (537) 1,571 116,774 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of changes in other comprehensive income for entities accounted for using the equity method	Million of euros 2018 2017 2016 Balance at beginning of year (222) (153) (232) Revaluation gains/(losses) (65) (84) 79 Net amounts transferred to profit or loss 20 15 — Balance at end of year (267) (222) (153) Of which: Zurich Santander Insurance América, S.L. (159) (145) (84)

Accumulated retained earnings (

Accumulated retained earnings (Tables)	12 Months Ended
	Dec. 31, 2018
Accumulated Retained Earnings
Schedule of accumulated retained earnings and reserves of entities accounted for using the equity method	Million of euros 2018 2017 2016 Restricted reserves 2,580 2,880 2,686 Legal reserve 1,624 1,614 1,459 Own shares 902 1,212 1,173 Revaluation reserve Royal Decree-Law 7/1996 43 43 43 Reserve for retired capital 11 11 11 Unrestricted reserves 12,100 11,368 11,285 Voluntary reserves (*) 5,737 6,904 7,192 Consolidation reserves attributable to the Bank 6,363 4,464 4,093 Reserves of subsidiaries 37,593 36,862 34,568 Reserves of entities accounted for using the equity method 917 725 465 53,190 51,835 49,004 (*) In accordance with the commercial regulations in force in Spain.
Schedule of Reserves of subsidiaries based on the companies' contribution to the Group	Million of euros 2018 2017 2016 Banco Santander (Brasil) S.A. (Consolidated Group) 10,755 9,874 8,993 Santander UK Group 8,207 7,724 6,887 Group Santander Holdings USA. 4,260 4,150 4,091 Banco Santander México, S.A., Institución de Banca Múltiple, Grupo Financiero Santander México 3,436 3,229 3,255 Banco Santander - Chile 2,963 2,764 2,630 Santander Consumer Finance Group 2,841 2,465 2,027 Banco Santander Totta, S.A. (Consolidated Group) 2,729 2,821 2,593 Santander Bank Polska S.A. 1,387 1,093 967 Santander Seguros y Reaseguros, Compañía Aseguradora, S.A. 714 638 824 Banco Santander (Suisse) SA. 369 381 354 Santander Investment, S.A. 208 202 349 Banco Santander Río S.A. (82) 1,639 1,326 Cartera Mobiliaria, S.A., SICAV — — 377 Exchange differences, consolidation adjustments and other companies (*) (194) (118) (105) 37,593 36,862 34,568 Of which, restricted 2,964 2,777 2,730 (*) Includes the charge relating to cumulative exchange differences in the transition to International Financial Reporting Standards.

Memorandum items (Tables)

Memorandum items (Tables)	12 Months Ended
	Dec. 31, 2018
Off-balance-sheet exposures
Schedule of contingent commitments	Million of euros 2018 2017 2016 Loans commitment granted 218,083 207,671 202,097 Of which doubtful 298 81 8 Financial guarantees granted 11,723 14,499 17,244 Of which doubtful 181 254 1,070 Financial guarantees 11,557 14,287 17,244 Credit derivatives sold 166 212 — Other commitments granted 74,389 64,917 57,055 Of which doubtful 983 992 — Technical guarantees 35,154 30,273 23,684 Other 39,235 34,644 33,371
Schedule of off-balance sheet funds managed by the entity and joint ventures	Million of euros 2018 2017 2016 Investment funds 127,564 135,749 129,930 Pension funds 11,160 11,566 11,298 Assets under management 19,131 19,259 18,032 157,855 166,574 159,260

Hedging Derivatives (Tables)

Hedging Derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about hedged items [line items]
Schedule of details of hedging instruments	Million Euros 2018 Carrying amount Changes in fair value used for Notional Value Assets Liabilities calculating hedge ineffectiveness Balance sheet line ítems Fair value hedges: 178,719 3,451 (5,114) 96 Interest rate risk 163,241 2,648 (4,616) 56 Equity swap 109 — (2) — Hedging derivatives Future interest rate 7,702 — — (126) Hedging derivatives Interest rate swap 129,217 2,345 (4,168) 321 Hedging derivatives Call money swap 19,579 170 (250) (32) Hedging derivatives Currency swap 4,957 121 (45) (17) Hedging derivatives Inflation swap — — — 9 Hedging derivatives Swaption 51 6 (6) — Hedging derivatives Collar 15 1 — — Hedging derivatives Floor 1,611 5 (145) (99) Hedging derivatives Exchange rate risk 3,019 11 (1) 3 Fx forward 3,019 11 (1) 3 Hedging derivatives Interest rate and exchange rate risk 12,237 792 (493) 42 Interest rate swap 3,022 143 (20) (15) Hedging derivatives Call money swap 20 — — — Hedging derivatives Currency swap 9,195 649 (473) 57 Hedging derivatives Inflation risk 168 — (4) (5) Call money swap 64 — (3) (3) Hedging derivatives Currency swap 104 — (1) (2) Hedging derivatives Credit risk 54 — — — CDS 54 — — — Hedging derivatives Cash flow hedges: 118,400 4,865 (976) (28) Interest rate risk 38,229 307 (229) 203 Fx forward 49 — (1) (1) Hedging derivatives Future interest rate 127 — — 29 Hedging derivatives Interest rate swap 33,956 240 (202) 159 Hedging derivatives Currency swap 2,350 57 (26) 11 Hedging derivatives Floor 1,747 10 — 5 Hedging derivatives Exchange rate risk 38,457 971 (568) (878) Future FX and c/v term FV 4,955 — — (697) Hedging derivatives FX forward 3,283 186 (15) (36) Hedging derivatives Future interest rate 4,946 — — (12) Hedging derivatives Interest rate swap 1,055 10 (5) 8 Hedging derivatives Currency swap 23,904 775 (548) (142) Hedging derivatives Floor 314 — — — Hedging derivatives Deposits borrowed — — — 1 Deposits Interest rate and exchange rate risk 34,383 3,542 (124) 665 Interest rate swap 12,572 20 (97) (7) Hedging derivatives Currency swap 21,811 3,522 (27) 672 Hedging derivatives Inflation risk 6,318 45 (30) 11 FX forward 414 — (9) (1) Hedging derivatives Currency swap 5,904 45 (21) 12 Hedging derivatives Equity risk 77 — (4) (8) Option 77 — (4) (8) Hedging derivatives Other risk 936 — (21) (21) Future FX and c/v term RF 936 — (21) (21) Hedging derivatives Hedges of net investments in foreign operations: 21,688 291 (273) (1) Exchange rate risk 21,688 291 (273) (1) FX forward 21,688 291 (273) (1) Hedging derivatives 318,807 8,607 (6,363) 67
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges: 9,377 17,989 23,773 78,541 49,039 178,719 Interest rate risk 8,436 12,519 21,987 73,989 46,310 163,241 Equity swap — 27 46 36 — 109 Future interest rate 668 2,012 981 2,650 1,391 7,702 Interest rate swap 7,672 10,213 18,423 60,502 32,407 129,217 Call money swap 96 267 1,823 6,967 10,426 19,579 Currency swap — — 714 2,368 1,875 4,957 Swaption — — — 51 — 51 Collar — — — — 15 15 Floor — — — 1,415 196 1,611 Exchange rate risk 17 1,855 1,147 — — 3,019 Fx forward 17 1,855 1,147 — — 3,019 Interest rate and exchange rate risk 924 3,615 639 4,503 2,556 12,237 Interest rate swap 445 1,462 35 710 370 3,022 Call money swap — — — — 20 20 Currency swap 479 2,153 604 3,793 2,166 9,195 Inflation risk — — — — 168 168 Call money swap — — — — 64 64 Currency swap — — — — 104 104 Credit risk — — — 49 5 54 CDS — — — 49 5 54 Cash flow hedges: 18,684 6,994 16,954 62,947 12,821 118,400 Interest rate risk 2,079 2,607 6,971 26,020 552 38,229 Fx forward 49 — — — — 49 Future interest rate 2 — — 125 — 127 Interest rate swap 2,028 2,161 5,957 23,593 217 33,956 Currency swap — 446 839 730 335 2,350 Floor — — 175 1,572 — 1,747 Exchange rate risk 16,166 3,478 5,896 11,984 933 38,457 Future FX and c/v term FV 4,955 — — — — 4,955 FX forward 1,423 — 47 1,813 — 3,283 Future interest rate 4,946 — — — — 4,946 Interest rate swap — — — 1,055 — 1,055 Currency swap 4,842 3,478 5,535 9,116 933 23,904 Floor — — 314 — — 314 Interest rate and exchange rate risk — 8 2,921 21,930 9,524 34,383 Interest rate swap — 8 898 8,456 3,210 12,572 Currency swap — — 2,023 13,474 6,314 21,811 Inflation risk 439 524 566 2,977 1,812 6,318 FX forward — 121 156 137 — 414 Currency swap 439 403 410 2,840 1,812 5,904 Equity risk — — 41 36 — 77 Option — — 41 36 — 77 Other risk — 377 559 — — 936 Future FX and c/v term RF — 377 559 — — 936 Hedges of net investments in foreign operations: 555 777 11,067 9,289 — 21,688 Exchange rate risk 555 777 11,067 9,289 — 21,688 FX forward 555 777 11,067 9,289 — 21,688 28,616 25,760 51,794 150,777 61,860 318,807
Schedule of details of hedged exposure/hedged items	December 31, 2018 Million of euros Accumulated amount Change in fair of fair value value of hedged Cash flow hedge/currency Carrying amount of adjustments on the ítem for translation reserve hedged items hedged item ineffectiveness Continuing Discontinued Assets Liabilities Assets Liabilities Balance sheet line item assessment hedges hedges Fair value hedges: 110,669 46,830 1,915 (1,765) (20) — — Interest rate risk 104,393 39,251 1,886 (1,478) (74) — — Deposits 5,922 1,195 279 1 Deposits and loans and advances (39) — — Bond 27,235 21,759 792 (791) Debt instruments (35) — — Repo 13,874 561 25 (16) Other assets 18 — — Loans of securitiesa 53,397 175 742 — Loans and advances (186) — — Liquidity facilities 3,965 232 48 (2) Loans and advances 35 — — Issuances assurance — 2,013 — (12) Other assets/liabilities 3 — — Securitisation — 13,316 — (658) Other assets/liabilities 170 — — Equity instruments — — — — Equity instruments (40) — — Exchange rate risk 3,378 — 5 — (3) — — Deposits 1,614 — 9 — Deposits and loans and advances 8 — — Bonds 1,764 — (4) — Debt instruments (11) — — Interest and Exchange rate risk 2,776 7,474 21 (287) 53 — — Borrowed deposits 751 — 19 — Deposits and loans and advances 16 — — Bonds 1,591 3,571 2 (26) Debt instruments (31) — — Securitisation — 3,358 — (262) Other assets/liabilities 67 — — Repos 434 99 — 1 Other assets/liabilities 1 — — CLO — 446 — — Other assets/liabilities — — — Inflation risk 68 105 3 1 4 — — Deposits — 105 — 1 Deposits and loans and advances 1 — — Bonds 68 — 3 — Debt instruments 3 — — Credit risk 54 — — — — — — Bonds 54 — — — Debt instruments — — — Cash flow hedges (432) 447 (10) Interest rate risk (52) 131 (12) Firm commitment Other assets/liabilities (24) (75) — Deposits Deposits and loans and advances (26) 47 — Governmenclasst bonds Debt instruments (13) 92 — Liquidity facilities Loans and advances 8 65 (12) Secondary market loans Other assets/liabilities 4 2 — Senior securitization Other assets/liabilities (1) — — Exchange rate risk (416) (23) 2 Deposits Other assets/liabilities 83 (8) — Bonds Deposits and loans and advances (309) (16) 2 Secondary market loans Loans and advances (179) (21) — Senior titulisation Other assets/liabilities (11) 21 — CLO Other assets/liabilities — 1 — Interest and Exchange rate risk 4 341 — Deposits Deposits and loans and advances 7 2 — Bonds Debt instruments (13) (9) — Securitisation Other assets/liabilities 10 348 — Inflation risk 15 22 — Deposits Deposits and loans and advances 25 25 — Bonds Debt instruments (3) (3) — Liquidity facilities Loans and advances (7) — — Equity risk 17 (4) — Highly likely scheduled transactions Other assets/liabilities 17 (4) — Other risks — (20) — Bonds Other assets/liabilities — (20) — Net foreign investments hedges 792 — 10 — — — — Exchange rate risk 792 — 10 — — — — Firm commitment 13 — — — Other assets/liabilities — — — Equity instruments 779 — 10 — Equity instruments — — — 111,461 46,830 1,925 (1,765) (452) 447 (10)
Schedule of effectiveness of hedging, impacts on profit or loss and other comprehensive income	Million of euros 2018 Earnings/ Reclassified amount of reserves to the income statement due to: (losses) Ineffective Cover recognised in coverage transaction another recognised in affecting the cumulative the income Line of the income statement that includes income overall result statement the ineffectiveness of cash flows statement Line of the income statement that includes reclassified items Fair value hedges 75 Interest rate risk (18) Deposits (24) Gains or losses of financial assets/liabilities Bonds (61) Gains or losses of financial assets/liabilities Repo 1 Gains or losses of financial assets/liabilities Loans of fixed-income securities 46 Gains or losses of financial assets/liabilities Liquidity lines 12 Gains or losses of financial assets/liabilities Securitisations 8 Gains or losses of financial assets/liabilities Risk of interest rate and exchange rate 95 Deposits 39 Gains or losses of financial assets/liabilities Bonds 8 Gains or losses of financial assets/liabilities Securitisations 49 Gains or losses of financial assets/liabilities CLO (1) Gains or losses of financial assets/liabilities Other Risks (2) Securitisations (2) Gains or losses of financial assets/liabilities Cash flow hedges 200 8 553 Risk of interest rate 193 (4) 39 Firm Commitment (2) — Gains or losses of financial assets/liabilities (24) Interest margin Deposits 50 (21) Gains or losses of financial assets/liabilities (4) Interest margin Bonds 104 2 Gains or losses of financial assets/liabilities 17 Interest margin/ Gains or losses of financial assets/liabilities Loans secondary markets 85 16 Gains or losses of financial assets/liabilities 47 Interest margin/ Gains or losses of financial assets/liabilities Liquidity lines 2 — Gains or losses of financial assets/liabilities 3 Interest margin Repo (46) — Gains or losses of financial assets/liabilities — Interest margin Securitisations — (1) Gains or losses of financial assets/liabilities — Risk of Exchange rate (20) (688) (457) Deposits (25) (698) Gains or losses of financial assets/liabilities (563) Interest margin/ Gains or losses of financial assets/liabilities Asset bonds (25) 43 Gains or losses of financial assets/liabilities 89 Interest margin/ Gains or losses of financial assets/liabilities Repo — — Gains or losses of financial assets/liabilities (3) Gains or losses of financial assets/liabilities Loans secondary markets 5 4 Gains or losses of financial assets/liabilities 48 Interest margin/ Gains or losses of financial assets/liabilities Securitisations 24 (37) Gains or losses of financial assets/liabilities (36) Interest margin / Gains or losses of financial assets/liabilities CLO 1 — Gains or losses of financial assets/liabilities 8 Interest margin / Gains or losses of financial assets/liabilities Risk of interest rate and exchange rate 45 700 967 Deposits 1 743 Gains or losses of financial assets/liabilities 778 Interest margin Bonds (4) 447 Gains or losses of financial assets/liabilities 571 Interest margin/ Gains or losses of financial assets/liabilities Securitisations 48 (490) Gains or losses of financial assets/liabilities (382) Interest margin/ Gains or losses of financial assets/liabilities Risk of inflation 11 — 4 Deposits 14 — Gains or losses of financial assets/liabilities 3 Interest margin Asset bonds (3) — Gains or losses of financial assets/liabilities 1 Interest margin Risk of equity (8) — — Highly probable planned transactions (8) — Gains or losses of financial assets/liabilities — Other risks (21) — — Bonds (21) — Gains or losses of financial assets/liabilities — — — — Coverage of net investment abroad — — — Risk of Exchange rate — — — Equity instruments — — Gains or losses of financial assets/liabilities — 200 83 553
Schedule of movement in hedging components in other comprehensive income	Million of euros 2018 Balance at beginning of year 152 Cash flow hedges Risks of interest rate 193 Amounts transferred to income statements (37) Other reclassifications 230 Risks of exchange rate (20) Amounts transferred to income statements 457 Other reclassifications (477) Risks of interest rate and exchange rate 45 Amounts transferred to income statements (967) Other reclassifications 1,012 Risk of inflation 11 Amounts transferred to income statements (4) Other reclassifications 15 Risk of equity (8) Amounts transferred to income statements — Other reclassifications (8) Other risks (21) Amounts transferred to income statements — Other reclassifications (21) Minorities (25) Taxes (50) Balance at end of year 277
Grupo Santander UK
Disclosure of detailed information about hedged items [line items]
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 6,888 9,403 16,333 44,166 17,498 94,288 Average fixed interest rate (%) GBP 0.633 0.788 1.057 1.586 2.849 Average fixed interest rate (%) USD (0.223) 0.670 0.911 1.085 1.261 Average fixed interest rate (%) EUR 1.513 1.314 1.337 2.684 2.179 Interest rate and foreign exchange rate risk Exchange rate instruments Nominal 877 2,894 — 1,331 585 5,687 Average GBP/EUR exchange rate — — — 1.183 1.168 Average GBP/USD exchange rate 1.580 1.332 — 1.511 — Average fixed interest rate (%) USD — — — 3.888 3.923 Average fixed interest rate (%) EUR 3.615 2.500 — 2.375 7.950 Cash flow hedges Interest rate risk Interest rate instruments Nominal — 1,917 2,225 3,466 — 7,608 Average fixed interest rate (%) GBP — 0.726 0.733 1.334 — Foreign exchange risk Exchange rate instruments Nominal 4,378 2,853 3,310 7,132 — 17,673 Average GBP/JPY exchange rate — 147.215 146.372 145.319 — Average GBP/EUR exchange rate — — 1.280 1.135 — Average GBP/USD exchange rate 1.304 1.307 1.310 1.305 — Interest rate and foreign exchange rate risk Exchange rate instruments Nominal — — 2,859 21,288 9,495 33,642 Average GBP/EUR exchange rate — — 1.252 1.271 1.217 Average GBP/USD exchange rate — — 1.633 1.545 1.511 Average fixed interest rate (%) GBP — — 2.340 2.660 2.900
Santander Consumer Group [Member]
Disclosure of detailed information about hedged items [line items]
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 253 672 3,488 6,883 63 11,359 Average fixed interest rate (%) EUR (0.197) (0.125) (0.036) (0.065) (0.113) Average fixed interest rate (%) CHF (0.659) (0.696) (0.679) (0.561) — Foreign exchange risk Exchange rate instruments Nominal 17 30 376 — — 423 Average DKK/EUR exchange rate 134.135 — 134.109 — — Average NOK/EUR exchange rate — — 103.232 — — Average CHF/EUR exchange rate — 878.624 887.218 — — Interest rate and foreign exchange rate risk Exchange rate instruments Nominal — 240 339 448 — 1,027 Average SEK/EUR exchange rate — — 0.104 — — Average DKK/EUR exchange rate — 0.134 0.134 0.134 — Average fixed interest rate (%) SEK — — 0.008 — — Average fixed interest rate (%) DKK — 0.002 0.003 0.004 — Cash flow hedges Interest rate risk Interest rate instruments Nominal 85 99 313 423 — 920 Average fixed interest rate (%) EUR 0.183 0.183 0.183 0.183 — Foreign exchange risk Exchange rate instruments Nominal 339 557 2,368 1,061 — 4,325 Average SEK/EUR exchange rate 0.101 0.098 0.099 0.099 — Average NOK/EUR exchange rate 0.108 0.108 0.108 0.108 — Average CHF/EUR exchange rate 0.896 0.859 0.870 0.900 — Average CAD/EUR exchange rate 0.654 0.658 0.652 0.656 — Average DKK/EUR exchange rate 0.134 0.134 0.134 — — Average PLN/EUR exchange rate — — 0.234 0.233 — Average USD/EUR exchange rate — — 0.897 — — Average JPY/EUR exchange rate — — 0.008 0.008 — Hedges of net investments in foreign operations Foreign exchange risk Exchange rate instruments Nominal 181 282 480 — — 943 Average NOK/EUR exchange rate 103.751 103.538 102.963 — — Average CNY/EUR exchange rate — — 121.796 — —
Banco Santander [Member]
Disclosure of detailed information about hedged items [line items]
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 500 665 425 12,987 22,030 36,602 Average fixed interest rate (%) GBP — — — — 7.08 Average fixed interest rate (%) EUR 3.75 0.63 2.06 1.81 3.20 Average fixed interest rate (%) CHF — — 0.76 1.04 Average fixed interest rate (%) USD — — 1.38 3.43 4.11 Foreign exchange risk Exchange rate instruments Nominal — 1,825 771 — — 2,596 Interest rate and foreign exchange rate risk Exchange rate instruments Nominal 41 461 120 2,085 951 3,656 Average fixed interest rate (%) AUD/EUR — — — 4.00 4.80 Average fixed interest rate (%) CZK/EUR — — — 0.86 — Average fixed interest rate (%) EUR/COP — — 7.54 — — Average fixed interest rate (%) HKD/EUR — — — 2.52 — Average fixed interest rate (%) JPY/EUR — — — 0.64 1.28 Average fixed interest rate (%) NOK/EUR — — — — 3.61 Average fixed interest rate (%) USD/COP 6.13 6.71 — 9.47 — Average AUD/EUR exchange rate — — — 1.499 1.499 Average CZK/EUR exchange rate — — — 25.407 26.030 Average EUR/GBP exchange rate — 1.145 — — — Average EUR/COP exchange rate — — 0.0003 — — Average EUR/MXN exchange rate — — — — — Average HKD/EUR exchange rate — — — 8.718 — Average JPY/EUR exchange rate — — — 132.014 125.883 Average MXN/EUR exchange rate — — — 14.696 Average NOK/EUR exchange rate — — — — 9.606 Average USD/BRL exchange rate — — 0.269 — — Average USD/COP exchange rate — 0.0003 0.0003 — 0.0003 Credit Risk Credit risk instruments Nominal — — — 49 5 54 Cash flow hedges Interest rate risk Interest rate instruments Nominal 1,942 — — 6,130 20 8,092 Average fixed interest rate (%) EUR — — — 0.51 0.55 Hedges of net investments in foreign operations Exchange rate instruments Exchange rate instruments Nominal 373 497 10,587 9,289 — 20,746 Average BRL/EUR exchange rate 4.46 — 4.46 4.73 — Average CLP/EUR exchange rate — 766.01 768.25 795.10 — Average CNY/EUR exchange rate — — 8.14 — — Average COP/EUR exchange rate — 3,728.01 3,685.80 — — Average GBP/EUR exchange rate — 0.91 0.89 — — Average MXN/EUR exchange rate 22.98 — 24.51 24.50 — Average PLN/EUR exchange rate — — 4.38 4.26 —
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil
Disclosure of detailed information about hedged items [line items]
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal 668 2,045 — 3,529 1,378 7,620 Average fixed interest rate (%) BRL 9.500 6.967 6.937 10.055 10.030 Foreign exchange rate risk and other Exchange rate instruments Nominal 6 15 36 316 38 411 Average USD/BRL exchange rate 3.247 3.303 3.551 3.642 3.265 Cash flow hedges Interest rate risk Interest rate instruments Nominal 3,877 2,997 3,030 119 — 10,023 Average fixed interest rate (%) BRL 6.500 6.500 6.500 6.500 — Foreign exchange risk and other Exchange rate instruments Nominal — 8 26 — 238 272 Average USD/BRL exchange rate — 3.716 3.648 — 3.135
Banco Santander S.A. (Mexico)
Disclosure of detailed information about hedged items [line items]
Schedule of maturity profile of hedging instruments	December 31, 2018 Million of euros Up to one One to three Three months to One year to More than month months one year five years five years Total Fair value hedges Interest rate risk Interest rate instruments Nominal — 1 346 80 — 427 Average fixed interest rate (%) MXN — 5.180 6.907 5.593 — Average fixed interest rate (%) USD — — 1.465 1.465 — Interest rate and foreign exchange rate Exchange and interest rate instruments Nominal — — 41 282 1,009 1,332 Average EUR/MXN exchange rate — — — 20.470 21.890 Average GBP/MXN exchange rate — — — 24.870 25.310 Average USD/MXN exchange rate — — 13.920 13.920 18.390 Average MXV/MXN exchange rate — — 5.059 5.059 5.059 Average fixed interest rate (%) USD — — 8.000 3.980 4.125 Average fixed interest rate (%) EUR — — — 2.420 2.750 Average fixed interest rate (%) GBP — — — — 6.750 Cash flow hedges Interest rate risk Interest rate instruments Nominal — — — 178 — 178 Average fixed interest rate (%) MXN — — — 7.258 — Foreign exchange risk Exchange rate instruments Nominal 1,415 44 56 2,719 103 4,337 Average EUR/MXN exchange rate — — 16.679 18.932 18.688 Average GBP/MXN exchange rate — — — 23.127 25.947 Average USD/MXN exchange rate 18.729 20.289 17.918 16.443 18.508 Average BRL/MXN exchange rate 5.863 — 5.732 5.736 —

Interest income (Tables)

Interest income (Tables)	12 Months Ended
	Dec. 31, 2018
Interest income.
Detail of main interest and similar income items	Million of euros 2018 2017 2016 Loans and advances, central banks 1,320 1,881 2,090 Loans and advances, credit institutions 1,555 1,840 2,388 Debt instruments 6,429 7,141 6,927 Loans and advances, customers 43,489 43,640 42,578 Other interest 1,532 1,539 1,173 54,325 56,041 55,156

Interest expense (Tables)

Interest expense (Tables)	12 Months Ended
	Dec. 31, 2018
Interest expense.
Detail of main items of interest expense and similar charges	Million of euros 2018 2017 2016 Central banks deposits 421 216 127 Credit institution deposits 2,597 2,045 1,988 Customer deposits 9,062 11,074 12,886 Debt securities issued and subordinated liabilities 6,073 6,651 7,767 Marketable debt securities 5,303 5,685 6,822 Subordinated liabilities (Note 23) 770 966 945 Provisions for pensions (Note 25) 186 198 201 Other interest 1,645 1,561 1,098 19,984 21,745 24,067

Dividend income (Tables)

Dividend income (Tables)	12 Months Ended
	Dec. 31, 2018
Dividend income Abstract
Detail of Income from dividends	Million of euros 2018 (*) 2017 2016 Dividend income classified as: Financial assets held for trading 241 234 217 Non-trading financial assets mandatorily at fair value through profit or loss 23 — — Financial assets available-for-sale — 150 196 Financial assets at fair value through other comprehensive income 106 — — 370 384 413 (*) See further detail regarding the impacts of the entry into force of IFRS9 as of January 1, 2018 (Note 1.b).

Income from companies account_2

Income from companies accounted for using the equity method (Tables)	12 Months Ended
	Dec. 31, 2018
Income from companies accounted for using the equity method abstract
Schedule of income from companies accounted for using the equity method	Million of euros 2018 2017 2016 Zurich Santander Insurance América, S.L. 194 241 223 Wizink Bank, S.A. 56 36 — Allianz Popular, S.L. 45 15 — Companhia de Crédito, Financiamento e Investimento RCI Brasil 21 19 12 SAM Investment Holdings Limited — 87 79 Other entities 421 306 130 737 704 444

Commission income (Tables)

Commission income (Tables)	12 Months Ended
	Dec. 31, 2018
Commission income
Detail of fee and commission income	Million of euros 2018 2017 2016 Coming from collection and payment services: Bills 334 368 295 Demand accounts 1,371 1,490 1,191 Cards 3,514 3,515 2,972 Orders 475 449 431 Cheques and other 138 154 133 5,832 5,976 5,022 Coming from non-banking financial products: Investment funds 1,024 751 696 Pension funds 124 92 86 Insurance 2,433 2,517 2,428 3,581 3,360 3,210 Coming from Securities services: Securities underwriting and placement 283 374 282 Securities trading 251 302 287 Administration and custody 458 359 297 Asset management 305 251 201 1,297 1,286 1,067 Other: Foreign exchange 546 471 353 Financial guarantees 549 559 505 Commitment fees 291 283 286 Other fees and commissions 2,568 2,644 2,500 3,954 3,957 3,644 14,664 14,579 12,943

Commission expense (Tables)

Commission expense (Tables)	12 Months Ended
	Dec. 31, 2018
Commission expense
Detail of fee and commission expense	Million of euros 2018 2017 2016 Commissions assigned to third parties 1,972 1,831 1,639 Cards 1,358 1,391 1,217 By collection and return of effects 11 12 11 Other fees assigned 603 428 411 Other commissions paid 1,207 1,151 1,124 Brokerage fees on lending and deposit transactions 42 49 47 Sales of insurance and pension funds 232 205 204 Other fees and commissions 933 897 873 3,179 2,982 2,763

Gains or losses on financial _2

Gains or losses on financial assets and liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Gains or losses on financial assets and liabilities
Schedule of detail, by origin, of gains/losses on financial assets and liability	Million of euros 2018 (*) 2017 2016 Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net (IFRS9) 604 — — Financial assets at amortised cost 39 — — Other financial assets and liabilities 565 — — Of which: debt instruments 563 — — Of which: equity instruments — — — Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net (IAS39) — 404 869 Of which financial assets available for sale 472 861 Of which: debt instruments 316 464 Of which: equity instruments — 156 397 Gains or losses on financial assets and liabilities held for trading, net (**) 1,515 1,252 2,456 Gains or losses on non-trading financial assets and liabilities mandatory at fair value through profit or loss 331 — — Gains or losses on financial assets and liabilities measured at fair value through profit or loss, net (**) (57) (85) 426 Gains or losses from hedge accounting, net 83 (11) (23) 2,476 1,560 3,728 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Includes the net result obtained by transactions with debt securities, equity instruments, derivatives and short positions included in this portfolio when the Group jointly manages its risk in these instruments.
Schedule of exchange differences, net	Million of euros 2018 2017 2016 Exchange differences, net (679) 105 (1,627)
Schedule of detail of asset balances measured at fair value through profit or loss	Million of euros 2018 2017 2016 Loans and receivables: 56,323 40,875 40,390 Central banks 9,226 — — Credit institutions 23,099 11,585 13,290 Customers 23,998 29,290 27,100 Debt instruments 36,609 39,836 52,320 Equity instruments 12,198 22,286 15,043 Derivatives 55,939 57,243 72,043 161,069 160,240 179,796
Schedule of detail of liability balances measured at fair value through profit or loss	Million of euros 2018 2017 2016 Deposits 65,304 84,724 48,863 Central banks 14,816 9,142 10,463 Credit institutions 10,891 18,458 5,059 Customer 39,597 57,124 33,341 Marketable debt securities 2,305 3,056 2,791 Short positions 15,002 20,979 23,005 Derivatives 55,341 57,892 74,369 Other financial liabilities 449 589 — 138,401 167,240 149,028

Other operating income and ex_2

Other operating income and expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Other operating income and expenses
Schedule of other operating income and other operating expenses	Million of euros 2018 2017 2016 Insurance activity 51 57 63 Income from insurance and reinsurance contracts issued 3,175 2,546 1,900 Of which: Insurance and reinsurance premium income 3,011 2,350 1,709 Reinsurance income (Note 15) 164 196 191 Expenses of insurance and reinsurance contracts (3,124) (2,489) (1,837) Of which: Claims paid, other insurance-related expenses and net provisions for insurance contract liabilities (2,883) (2,249) (1,574) Reinsurance premiums paid (241) (240) (263) Other operating income 1,643 1,618 1,919 Non- financial services 367 472 698 Other operating income 1,276 1,146 1,221 Other operating expense (2,000) (1,966) (1,977) Non-financial services (270) (302) (518) Other operating expense: (1,730) (1,664) (1,459) Of which, credit institutions deposit guarantee fund and single resolution fund (895) (848) (711) (306) (291) 5

Personnel expenses (Tables)

Personnel expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Share-based payment arrangement
Schedule of detail of personnel expenses	Million of euros 2018 2017 2016 Wages and salaries 8,824 8,879 8,133 Social Security costs 1,412 1,440 1,291 Additions to provisions for defined benefit pension plans (Note 25) 84 88 81 Contributions to defined contribution pension funds 287 271 266 Other Personnel expenses 1,258 1,369 1,233 11,865 12,047 11,004
Schedule of average number of employees	Average number of employees 2018 2017 2016 The Bank: Senior management (*) 22 64 76 Other line personnel 30,399 21,327 20,291 Clerical staff (**) — — 1,904 General services personnel (**) — — 13 30,421 21,391 22,284 Rest of Spain 7,944 12,703 6,925 Santander UK plc 18,757 19,079 19,428 Banco Santander (Brasil) S.A. 46,645 46,210 48,052 Other companies (***) 98,062 96,349 94,946 201,829 195,732 191,635 (*) During 2018, categories of deputy assistant executive vice president and above were erased. (**) During 2017, clerical staff and general services personnel categories were erased considering all the staff in the aforementioned categories on the other line personnel category. (***) Does not include staff affected by discontinued operations.
Schedule of functional breakdown of final employment by gender	The functional breakdown (final employment), by gender, at December 31, 2018 is as follows: Functional breakdown by gender Senior executives Other executives Other personnel Men Women Men Women Men Women Continental Europe 913 260 6,735 3,711 26,173 32,759 Latin America and Others 523 100 6,427 4,256 40,729 54,952 United Kingdom 107 39 1,309 640 9,218 13,862 1,543 399 14,471 8,607 76,120 101,573 The same information, expressed in percentage terms at December 31, 2018, is as follows: Functional breakdown by gender Senior executives Other executives Other personnel Men Women Men Women Men Women Continental Europe 78 % 22 % 64 % 36 % 44 % 56 % Latin America and Others 84 % 16 % 60 % 40 % 43 % 57 % United Kingdom 73 % 27 % 67 % 33 % 40 % 60 % 79 % 21 % 63 % 37 % 43 % 57 %
Schedule of number of employees with disabilities	Average number of employees (*) 2018 Senior management 6 Other management 64 Other staff 3,366 3,436 (*) An employee with disabilities is considered to be a person who is recognised by the State or the company in each jurisdiction where the Group operates and that entitles them to receive direct monetary assistance, or other types of aid such as, for example, reduction of their taxes. In the case of Spain, employees with disabilities have been considered to be those with a degree of disabilities greater than or equal to 33%. The amount does not include employees in the United States.
Schedule of deferred variable remuneration systems	Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (i) Deferred and conditional variable remuneration plan (2013) The purpose of this plan is to defer a portion of the variable remuneration of the beneficiaries over a period of three years for it to be paid in Santander shares. Group executives or employees whose variable remuneration or annual bonus for 2013 exceeded, in general, EUR 0.3 million (gross) In addition to that of the beneficiary remaining in the Group's employ, that none of the following circumstances should occur in the period prior to each deliveries: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) Significant changes in the Group’s economic capital or risk profile. The amount in shares is calculated based on the tranches of the following scale: - 300 thousand euros or less 0% deferred - 300 to 600 thousand euros 20% deferred - More than 600 thousand euros 30% deferred. Deferral period: 3 years. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (ii) Deferred conditional variable remuneration plan (2013, 2014, 2015, 2016, 2017 and 2018) The purpose of these cycles is to defer a portion of the variable remuneration of the beneficiaries over a period of three years for the third (2013), fourth (2014), sixth (2016) cycles, and over three or five years for the fifth (2015), seventh (2017) and eight (2018) cycles, for it to be paid, where appropriate, in cash and in Santander shares; the other portion of the variable remuneration is also to be paid in cash and Santander shares, upon commencement of the cycles, in accordance with the rules set forth below. Executive directors and certain executives (including senior management) and employees who assume risk, who perform control functions or receive an overall remuneration which puts them on the same remuneration level as senior executives and employees who assume risks (Fifth, fourth and third cycle) In the case of the seventh, sixth and eight cycle, the beneficiaries are Material Risk Takers (Identified staff) that are not beneficiaries of the Deferred Multiyear Objectives Variable Remuneration Plan. For the third, fourth, fifth and sixth cycles (2013 to 2016), the accrual of deferred compensation is conditioned, in addition to the requirement that the beneficiary remains in the Group's employ, with the exceptions included in the plan regulations upon none of the following circumstances existing during the period prior to each of the deliveries, pursuant to the provisions set forth in each case in the plan regulations: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) Significant changes in the Group’s economic capital or risk profile In the case of the seventh and eight cycles (2017 and 2018), the accrual of deferred compensation is conditioned, in addition to the permanence of the beneficiary in the Group, with the exceptions contained in the plan's regulations, to no assumptions in which there is a poor performance of the entity as a whole or of a specific division or area of the entity or of the exposures generated by the personnel, and at least the following factors must be considered: (i) significant failures in risk management committed by the entity , or by a business unit or risk control unit; (ii) the increase suffered by the entity or by a business unit of its capital needs, not foreseen at the time of generation of the exposures; (iii) Regulatory sanctions or judicial sentences for events that could be attributable to the unit or the personnel responsible for those. Also, the breach of internal codes of conduct of the entity; and (iv) Irregular behaviours, whether individual or collective, considering in particular the negative effects derived from the marketing of inappropriate products and the responsibilities of the persons or bodies that made those decisions. Paid half in cash and half in shares Third cycle (2013), 3 years deferral: - Executive directors: 40% and 60% immediate and deferred payments, respectively. - Division directors and other executives of the Group with a similar profile: 50% and 50% immediate and deferred payments, respectively. - Other Executives part of the Identified Staff: 40% and 60%, immediate and deferred payments, respectively. Fourth and fifth cycles (2014 and 2015, respectively): - Executive directors and members of the Identified Staff with total variable remuneration higher than 2.6 million euros: 40% paid immediately and 60% deferred over 5 years (3 years in fourth cycle). - - Other beneficiaries: 60% paid immediately and 40% deferred over 3 years. Sixth cycle (2016): - 60% of bonus will be paid immediately and 40% deferred over a three year period. Seventh and eight cycle (2017 and 2018): - Executive Directors and members of identified staff with target total variable remuneration higher or equal to 2.7 million euros: 40% paid immediately and 60% deferred over 5 years - Executive Directors and members of identified staff with total Variable remuneration between 1.7 million euros and 2.7 million euros: 50% paid immediately and 50% paid over 5 years - Other beneficiaries: 60% paid immediately and 40% deferred over 3 years. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (iii) Performance share plan (2014 and 2015) The purpose is to instrument a portion of the variable remuneration of the executive directors and other members of the Identified Staff, consisting of a long-term incentive (ILP) in shares based on the Bank's performance over a multiannual period. In addition, the second cycle (2015) also applies to other Bank employees not included in the Identified Staff or Material Risk Takers, in respect of whom it is deemed appropriate that the potential delivery of Bank shares be included in their remuneration package in order to better align the employee's interests with those of the Bank. Executive Directors and senior managers Other Material Risk Takers or Identified Staff Other beneficiaries in the case only of the second cycle. In addition to the requirement that the beneficiary remains in the Group's employ, with the exceptions included in the plan regulations, the delivery of shares to be paid on the ILP payment date based on compliance with the related multiannual target is conditional upon none of the following circumstances existing during the period prior to each of the: (i) Poor financial performance of the Group; (ii) breach by the beneficiary of internal regulations, including, in particular, those relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when it is required pursuant to a change in accounting standards; or (iv) For the second cycle (2015), based on the maximum benchmark value (20%), at the proposal of the remuneration committee, the Board of Directors will set the maximum number of shares, the value in euros of which is called the "Agreed-upon Amount of the ILP", taking into account (i) the Group's earnings per share (EPS) and (ii) the Group's return on tangible equity (RoTE) for 2015 with respect to those budgeted for the year. First cycle (2014): - Second cycle (2015), the basis of calculation is the fulfilment of the following objectives: - - - - - - Deferred variable Description Plan`s beneficiaries Conditions Calculation Base (iv) Deferred Multiyear Objectives Variable Remuneration Plan (2016, 2017 and 2018) The aim is simplifying the remuneration structure, improving the ex ante risk adjustment and increasing the impact of the long-term objectives on the Group's most relevant roles. The purpose of these cycles is to defer a portion of the variable remuneration of the beneficiaries over a period of three or five years, for it to be paid, where appropriate, in cash and in Santander shares; the other portion of the variable remuneration is also to be paid in cash and Santander shares, upon commencement of the cycles, in accordance with the rules set forth below. The accrual of the last third of the deferral (in the case of 3 years deferral) of the last three fifths (in the case of 5 years deferral) is also subject to long-term objectives. Executive directors, senior management and certain executives of the most relevant roles in the Group. In 2016 (first cycle), the accrual is conditioned, in addition to the permanence of the beneficiary in the Group, with the exceptions contained in the plan's regulations that none of The following circumstances during the period prior to each of the deliveries in the terms set forth in each case in the plan's regulations: (i) Poor performance of the Group; (ii) breach by the beneficiary of the internal regulations, including in particular that relating to risks; (iii) material restatement of the Group's consolidated financial statements, except when appropriate under a change in accounting regulations; Or (iv) Significant changes in the Group's economic capital or risk profile. In 2017 and 2018 (second and third cycles), the accrual is conditioned, in addition to the beneficiary permanence in the Group, with the exceptions contained in the plan's regulations, to the non-occurrence of instances of poor financial performance from the entity as a whole or of a specific division or area thereof or of the exposures generated by the personnel, at least the following factors must be considered: (i) Significant failures in risk management committed by the entity, or by a business unit or risk control unit; (ii) the increase suffered by the entity or by a business unit of its capital needs, not foreseen at the time of generation of the exposures; (iii) Regulatory sanctions or court rulings for events that could be attributable to the unit or the personnel responsible for those. Also, the breach of internal codes of conduct of the entity; and (iv) Irregular behaviours, whether individual or collective, considering in particular negative effects derived from the marketing of inappropriate products and responsibilities of persons or bodies that made those decisions. First cycle (2016): - Executive directors and members of the Identified Staff with total variable remuneration higher than or equal to 2.7 million euros: 40% paid immediately and 60% deferred over a 5 year period. - Senior managers, country heads of countries representing at least 1% of the Group´s capital and other members of the identified staff whose total variable remuneration is between 1.7 million and 2.7 million euros: 50% paid immediately and 50% deferred over a 5 year period. - Other beneficiaries: 60% paid immediately and 40% deferred over a 3 year period. The second and third cycles (2017 and 2018, respectively) are under the same deferral rules, save for the variable remuneration considered is target and not the actual award. In 2016 the metrics for the deferred portion subject to long-term objectives are: - Earnings per share (EPS) growth in 2018 over 2015. - Relative Total Shareholder Return (TSR) measured against a group of credit institutions. - Compliance with the fully-loaded common equity tier 1 (“CET1”) ratio target for financial year 2018. - Compliance with Santander Group’s underlying return on risk-weighted assets (“RoRWA”) growth target for financial year 2018 compared to financial year 2015. In 2017 (second cycle) and 2018 (third cycle) the metrics for the deferred portion subject to long-term objectives are: - EPS growth in 2019 over 2016 and in 2020 over 2017, for each respective cycle - Relative Total Shareholder Return (TSR) measured against a group of 17 credit institutions.in the periods 2017-2019 and 2018.-2019, respectively. - Compliance with the fully-loaded common equity tier 1 (“CET1”) ratio target for financial years 2019 and 2020, respectively. Deferred variable Description Plan`s beneficiaries Conditions Calculation Base Paid half in cash and half in shares. The maximum number of shares to be delivered is calculated by taking into account the weighted average daily volume of weighted average prices for the fifteen trading sessions prior to the previous Friday (excluding) on the date on which the board decides the bonus for the Executive directors of the Bank.
Schedule of options activity	Exercise Date of Date of Number of price in Number of commencement expiry of shares (in pounds Year Employee persons of exercise exercise thousand) sterling (*) granted group (**) period period Plans outstanding at 01/01/16 24,762 Options granted (Sharesave) 17,296 4.91 Employments 7,024 11/01/16 11/01/19 11/01/16 11/01/21 Options exercised (338) 3.67 Options cancelled (net) or not exercised (12,804) 3.51 Plans outstanding at 12/31/16 28,916 Options granted (Sharesave) 3,916 4.02 Employments 4,260 11/01/17 11/01/20 11/01/17 11/01/22 Options exercised (1,918) 3.77 Options cancelled (net) or not exercised (3,713) 3.40 Plans outstanding at 12/31/17 27,201 Options granted (Sharesave) 6,210 3.46 Employments 4,880 11/01/18 11/01/21 11/01/18 11/01/23 Options exercised (3,340) 3.16 Options cancelled (net) or not exercised (3,233) 3.76 Plans outstanding at 12/31/18 26,838 (*) At December 31, 2018, 2017, 2016 and 2015, the euro/pound sterling exchange rate was EUR 1.11790 GBP 1; EUR 1.12710 GBP 1, EUR 1.16798 GBP 1 and EUR 1.36249 GBP 1, respectively. (**) Number of accounts/contracts. A single employee may have more than one account/contract.
Performance share plans
Share-based payment arrangement
Schedule of fair value assumptions	PI14 Expected volatility (*) 51.35 % Annual dividend yield based on last few years 6.06 % Risk-free interest rate (Treasury Bond yield (zero coupon) over the period of the plan) 4.073 % (*) Calculated on the basis of historical volatility over the corresponding period (three years).
Sharesave plan
Share-based payment arrangement
Schedule of fair value assumptions	2018 2017 2016 Risk-free interest rate 1.27% ‑ 1.40% 0.89% ‑ 1.08 % 0.31% ‑ 0.41 % Dividend increase 5.6% ‑ 6.12% 5.48% ‑ 5.51 % 5.92% ‑ 6.21 % Implied volatility of underlying shares based on expected life of the options 23.99% ‑ 24.17% 26.16% ‑ 26.31 % 31.39% ‑ 32.00 % Expected life of options granted 3 and 5 years 3 and 5 years 3 and 5 years

Other general administrative _2

Other general administrative expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Other general administrative expenses
Schedule of detail of other general administrative expenses	Million of euros 2018 2017 2016 Property, fixtures and supplies 1,968 1,931 1,853 Technology and systems 1,550 1,257 1,095 Technical reports 707 759 768 Advertising 646 757 691 Taxes other than income tax 557 583 484 Communications 527 529 499 Surveillance and cash courier services 405 443 389 Per diems and travel expenses 225 217 232 Insurance premiums 76 78 69 Other administrative expenses 1,828 1,799 1,653 8,489 8,353 7,733
Schedule of technical reports includes the fees paid by various Group companies	Million of euros 2018 2017 2016 Audit fees 90.0 88.1 73.7 Audit-related fees 6.5 6.7 7.2 Tax fees 0.9 1.3 0.9 All other fees 3.4 3.1 3.6 Total 100.8 99.2 85.4
Schedule of number of offices	Group Number of branches 2018 2017 Spain 4,427 4,546 Group 8,790 9,151 13,217 13,697

Gains or losses on non-financ_2

Gains or losses on non-financial assets and investments, net (Tables)	12 Months Ended
	Dec. 31, 2018
Gain Loss On Disposal Of Assets Not Held For Sale [Abstract]
Detail of gains/ (losses) on disposal of assets not classified as non-current assets held for sale	Million of euros 2018 2017 2016 Gains: Tangible and intangible assets 124 134 131 Investments 2 443 30 Of which: Allfunds Bank, S.A. (Note 3) — 425 — 126 577 161 Losses: Tangible and intangible assets (92) (43) (116) Investments (6) (12) (15) (98) (55) (131) 28 522 30

Gains or losses on non-curren_2

Gains or losses on non-current assets held for sale not classified as discontinued operations (Tables)	12 Months Ended
	Dec. 31, 2018
Non-current assets held for sale
Schedule of gains or losses on non-current assets held for sale that were not classified as discontinued operations	Million of euros Net balance 2018 2017 2016 Tangible assets (123) (195) (141) Impairment (Note 12) (259) (306) (212) Gain (loss) on sale (Note 12) 136 111 71 Other gains and other losses — (8) — (123) (203) (141)

Other disclosures (Tables)

Other disclosures (Tables)	12 Months Ended
	Dec. 31, 2018
Other disclosures
Schedule of certain financial assets and liabilities by maturity	The detail, by maturity, of the balances of certain items in the consolidated balance sheet is as follows: December 31, 2018 (*) Million of euros Average On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 interest demand month months months years years years Total rate Assets: Cash, cash balances at Central Banks and other deposits on demand 113,663 — — — — — — 113,663 0.61 % Financial assets at fair value through other comprehensive income 1,886 6,023 3,329 12,873 19,432 10,705 64,172 118,420 Debt instruments 487 6,022 3,328 12,830 19,415 10,661 64,076 116,819 3.13 % Loans and advances 1,399 1 1 43 17 44 96 1,601 Customers 1,399 1 1 43 17 44 96 1,601 1.41 % Financial assets at amortised cost 46,247 56,818 71,627 102,036 134,697 107,921 426,753 946,099 Debt instruments 16 1,534 1,319 6,646 2,474 1,783 23,924 37,696 3.33 % Loans and advances 46,231 55,284 70,308 95,390 132,223 106,138 402,829 908,403 Central banks — 23 — 4 — — 15,574 15,601 4.63 % Credits institutions 10,092 5,389 6,711 6,003 5,314 947 1,024 35,480 1.66 % Customers 36,139 49,872 63,597 89,383 126,909 105,191 386,231 857,322 4.97 % 161,796 62,841 74,956 114,909 154,129 118,626 490,925 1,178,182 4.20 % Liabilities: Financial liabilities at amortised cost 545,284 87,782 93,293 127,522 182,670 56,927 78,152 1,171,630 — Deposits 536,134 74,440 67,406 91,958 107,459 18,833 6,871 903,101 Central banks 304 2,130 2,629 507 64,433 2,520 — 72,523 0.39 % Credit institutions 15,341 13,413 24,724 16,384 8,759 6,412 4,646 89,679 2.19 % Customer deposits 520,489 58,897 40,053 75,067 34,267 9,901 2,225 740,899 1.19 % Marketable debt securities (**) 237 11,347 18,817 33,536 71,805 37,919 70,653 244,314 2.59 % Other financial liabilities 8,913 1,995 7,070 2,028 3,406 175 628 24,215 545,284 87,782 93,293 127,522 182,670 56,927 78,152 1,171,630 1.48 % Difference (assets less liabilities) (383,488) (24,941) (18,337) (12,613) (28,541) 61,699 412,773 6,552 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Includes promissory notes, certificates of deposit and other short-term debt issues. The Group’s net borrowing position with the ECB was EUR 11,882 million at December 31, 2018, mainly because in last period the Group borrowed funds under the ECB's targeted longer-term refinancing operations (LTRO, TLTRO) programme. (See note 20). December 31, 2017 Million of euros Average On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 interest demand month months months years years years Total rate Assets: Cash, cash balances at central banks and other deposits on demand 110,995 — — — — — — 110,995 0.53 % Financial assets available-for-sale 326 2,467 1,646 11,497 22,447 11,164 78,934 128,481 — Debt instruments 326 2,467 1,646 11,497 22,447 11,164 78,934 128,481 4.34 % Loans and receivables 57,000 58,686 53,218 96,689 119,541 112,786 405,093 903,013 Debt instruments 249 1,381 997 2,073 2,317 1,656 8,870 17,543 3.06 % Loans and advances 56,751 57,305 52,221 94,616 117,224 111,130 396,223 885,470 — Central banks — 3,948 1,446 4,811 — — 16,073 26,278 5.10 % Credits institutions 18,242 4,198 3,445 5,708 5,694 939 1,341 39,567 1.26 % Customers 38,509 49,159 47,330 84,097 111,530 110,191 378,809 819,625 5.44 % Held-to-maturity investments — — — 1,902 122 294 11,173 13,491 1.52 % 168,321 61,153 54,864 110,088 142,110 124,244 495,200 1,155,980 4.61 % Liabilities: Financial liabilities at amortised cost 537,604 75,161 87,939 130,672 136,487 83,542 74,664 1,126,069 — Deposits 527,499 59,325 66,667 100,658 81,169 39,719 8,283 883,320 Central banks 450 2,015 681 2,715 42,988 22,565 — 71,414 0.24 % Credit institutions 20,870 15,263 13,350 25,406 6,501 5,247 4,663 91,300 2.40 % Customer deposits 506,179 42,047 52,636 72,537 31,680 11,907 3,620 720,606 2.00 % Marketable debt securities (*) 105 11,927 11,638 29,286 54,202 43,395 64,357 214,910 2.56 % Other financial liabilities 10,000 3,909 9,634 728 1,116 428 2,024 27,839 — 537,604 75,161 87,939 130,672 136,487 83,542 74,664 1,126,069 1.98 % Difference (assets less liabilities) (369,283) (14,008) (33,075) (20,584) 5,623 40,702 420,536 29,911 — (*) Includes promissory notes, certificates of deposit and other short-term debt issues. December 31, 2016 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 Average demand month months months years years years Total interest rate Assets: Cash, cash balances at central banks and other deposits on demand 76,454 — — — — — — 76,454 0.98 % Financial assets available-for-sale 200 5,986 2,007 5,442 23,574 13,900 60,178 111,287 Debt instruments 200 5,986 2,007 5,442 23,574 13,900 60,178 111,287 4.33 % Loans and receivables 52,512 48,420 56,725 85,521 113,387 93,816 389,623 840,004 Debt instruments 248 1,628 708 2,246 2,125 1,918 4,364 13,237 6.31 % Loans and advances 52,264 46,792 56,017 83,275 111,262 91,898 385,259 826,767 Central banks — 941 11,499 1,117 — 23 14,393 27,973 6.54 % Credits institutions 16,632 4,938 2,210 2,220 4,435 1,268 3,721 35,424 1.96 % Customers 35,632 40,913 42,308 79,938 106,827 90,607 367,145 763,370 5.79 % Held-to-maturity investments — — — 123 2,075 342 11,928 14,468 1.70 % 129,166 54,406 58,732 91,086 139,036 108,058 461,729 1,042,213 5.12 % Liabilities: Financial liabilities at amortised cost 480,075 95,583 67,282 125,774 115,591 69,467 90,468 1,044,240 Deposits 471,494 79,446 42,583 86,006 69,775 34,505 7,837 791,646 Central banks 422 2,007 633 101 20,027 20,922 — 44,112 0.26 % Credit institutions 16,649 16,357 10,603 23,313 13,540 5,560 3,742 89,764 3.97 % Customer deposits 454,423 61,082 31,347 62,592 36,208 8,023 4,095 657,770 2.25 % Marketable debt securities (*) 642 12,861 14,225 39,465 43,985 34,520 80,380 226,078 3.68 % Other financial liabilities 7,939 3,276 10,474 303 1,831 442 2,251 26,516 480,075 95,583 67,282 125,774 115,591 69,467 90,468 1,044,240 2.57 % Difference (assets less liabilities) (350,909) (41,177) (8,550) (34,688) 23,445 38,591 371,261 (2,027) (*) Includes promissory notes, certificates of deposit and other short-term debt issues.
Schedule of undiscounted contractual maturities of financial liabilities at amortized cost by maturity	December 31, 2018 (*) Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 532,915 74,320 67,169 91,766 106,935 18,439 6,540 898,084 Central banks 304 2,126 2,624 896 64,424 2,520 — 72,894 Credit institutions 15,257 13,413 24,698 16,288 8,552 6,085 4,427 88,720 Customer 517,354 58,781 39,847 74,582 33,959 9,834 2,113 736,470 Marketable debt securities 296 11,243 17,359 33,443 71,431 37,409 69,352 240,533 Other financial liabilities 8,913 1,995 7,070 2,028 3,406 175 628 24,215 542,124 87,558 91,598 127,237 181,772 56,023 76,520 1,162,832 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). December 31, 2017 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 526,059 57,490 89,249 99,780 64,977 32,365 8,157 878,077 Central banks 451 2,018 23,801 2,719 27,138 15,385 — 71,512 Credit institutions 20,378 14,903 13,035 24,807 6,348 5,123 4,553 89,147 Customer 505,230 40,569 52,413 72,254 31,491 11,857 3,604 717,418 Marketable debt securities 1,486 11,735 11,387 28,412 52,989 42,888 63,648 212,545 Other financial liabilities 10,001 3,908 9,634 728 1,116 428 2,024 27,839 537,546 73,133 110,270 128,920 119,082 75,681 73,829 1,118,461 December 31, 2016 Million of euros On Within 1 1 to 3 3 to 12 1 to 3 3 to 5 More than 5 demand month months months years years years Total Financial liabilities at amortised cost Deposits 467,529 95,231 49,246 68,830 66,255 34,781 7,765 789,637 Central banks 422 2,006 633 101 20,021 20,916 — 44,099 Credit institutions 16,676 15,789 15,500 20,057 12,364 5,517 3,736 89,639 Customer 450,431 77,436 33,113 48,672 33,870 8,348 4,029 655,899 Marketable debt securities 623 13,582 12,705 38,119 42,201 34,022 78,094 219,346 Other financial liabilities 7,939 3,645 10,097 305 1,837 442 2,251 26,516 476,091 112,458 72,048 107,254 110,293 69,245 88,110 1,035,499
Schedule of remainder of financial assets, liabilities and memorandum items by maturity	Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total FINANCIAL ASSETS Financial assets held for trading 4,512 3,564 6,793 22,084 19,350 36,576 92,879 Derivatives 2,691 3,165 899 15,189 14,098 19,897 55,939 Equity instruments — — — — — 8,938 8,938 Debt instruments 1,821 399 5,894 6,895 5,252 7,539 27,800 Loans and advances — — — — — 202 202 Credits institutions — — — — — — — Customers — — — — — 202 202 Financial assets designated at fair value through profit or loss 21,598 13,045 5,625 5,215 4,065 7,912 57,460 Debt instruments 604 7 304 727 348 1,232 3,222 Loans and advances 20,994 13,038 5,321 4,488 3,717 6,680 54,238 Central banks 1,211 5,433 2,582 — — — 9,226 Credit institutions 14,587 4,131 778 1,327 579 1,695 23,097 Customers 5,196 3,474 1,961 3,161 3,138 4,985 21,915 Non-trading financial assets mandatorily at fair value through profit or loss 3,215 346 17 125 2 7,025 10,730 Equity instruments — — — — — 3,260 3,260 Debt instruments 1,876 20 — — 2 3,689 5,587 Loans and advances 1,339 326 17 125 — 76 1,883 Central banks — — — — — — — Credits institutions 2 — — — — — 2 Customers 1,337 326 17 125 — 76 1,881 Financial assets at fair value through other comprehensive income — — — — — 2,671 2,671 Equity instruments — — — — — 2,671 2,671 Hedging derivatives 609 166 474 2,167 957 4,234 8,607 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 106 7 20 28 59 868 1,088 TOTAL FINANCIAL ASSETS 30,040 17,128 12,929 29,619 24,433 59,286 173,435 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total FINANCIAL LIABILITIES Financial liabilities held for trading 10,473 3,351 1,104 16,123 16,457 22,835 70,343 Derivatives 2,897 2,874 822 14,323 14,956 19,469 55,341 Shorts positions 7,576 477 282 1,800 1,501 3,366 15,002 Deposits — — — — — — — Central banks — — — — — — — Credits institutions — — — — — — — Customers — — — — — — — Marketable debt securities — — — — — — — Other financial liabilities — — — — — — — Financial liabilities designated at fair value through profit or loss 29,574 7,017 864 1,497 999 28,107 68,058 Deposits 29,522 6,947 627 531 455 27,222 65,304 Central banks 9,804 4,940 72 — — — 14,816 Credits institutions 8,809 949 271 188 229 445 10,891 Customers 10,909 1,058 284 343 226 26,777 39,597 Marketable debt securities 13 70 237 556 544 885 2,305 Other financial liabilities 39 — — 410 — — 449 Hedging derivatives 485 144 321 362 651 4,400 6,363 Changes in the fair value of hedged items in portfolio hedges of interest rate risk 3 5 23 64 60 148 303 TOTAL FINANCIAL LIABILITIES 40,535 10,517 2,312 18,046 18,167 55,490 145,067 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). Within 1 1 to 3 3 to 12 More than 5 Million of euros at December 31, 2018 (*) months months months 1 to 3 years 3 to 5 years years Total Memorandum items Loans commitment granted 71,860 12,436 22,749 35,632 43,205 32,201 218,083 Financial guarantees granted 2,100 1,737 4,437 1,728 1,029 692 11,723 Other commitments granted 58,431 1,486 6,174 2,650 3,503 2,145 74,389 MEMORANDUM ITEMS 132,391 15,659 33,360 40,010 47,737 35,038 304,195 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of equivalent euro value of assets and liabilities	Equivalent value in million of euros 2018 (*) 2017 2016 Assets Liabilities Assets Liabilities Assets Liabilities Cash, cash balances at central banks and other deposits on demand 61,372 — 67,025 — 60,423 — Financial assets/liabilities held for trading 56,217 40,989 82,004 76,459 100,083 70,958 Non-trading financial assets mandatorily at fair value through profit or loss 8,231 — — — — — Other financial assets/liabilities at fair value through profit or loss 32,244 35,997 7,322 21,766 6,965 16,667 Financial assets/liabilities available-for-sale — — 65,691 — 68,370 — Financial assets at fair value through other comprehensive income 67,926 — — — — — Financial assets at amortised cost 598,629 — — — — — Loans and receivables — — 553,301 — 571,829 — Investments held-to-maturity — — 11,490 — 12,272 — Investments 1,189 — 1,121 — 1,308 — Tangible assets 19,903 — 15,971 — 16,957 — Intangible assets 23,016 — 23,499 — 26,338 — Financial liabilities at amortised cost — 694,362 — 638,680 — 678,542 Liabilities under insurance contracts — 29 — 58 — 61 Other 24,506 20,567 23,695 20,989 27,961 23,169 893,233 791,944 851,119 757,952 892,506 789,397 (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b).
Schedule of financial assets measured at other than fair value	Million of euros 2018 2017 2016 Carrying Fair Carrying Fair Carrying Fair Assets amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 Loans and advances 908,403 914,013 — 88,091 825,922 885,470 895,645 — 141,839 753,806 826,767 833,819 — 127,224 706,595 Debt instruments 37,696 38,095 20,898 11,246 5,951 31,034 31,094 10,994 13,688 6,412 27,705 27,417 11,529 11,678 4,210 946,099 952,108 20,898 99,337 831,873 916,504 926,739 10,994 155,527 760,218 854,472 861,236 11,529 138,902 710,805
Schedule of financial liabilities measured at other than fair value	Million of euros 2018 2017 2016 Carrying Fair Carrying Fair Carrying Fair Liabilities amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 amount value Level 1 Level 2 Level 3 Deposits 903,101 902,680 — 302,414 600,266 883,320 883,880 — 177,147 706,733 791,646 792,172 — 90,271 701,901 Debt instruments and other financial liabilities 268,529 271,226 72,945 143,153 55,128 242,749 248,891 52,896 139,301 56,694 252,594 255,758 43,306 186,356 26,096 1,171,630 1,173,906 72,945 445,567 655,394 1,126,069 1,132,771 52,896 316,448 763,427 1,044,240 1,047,930 43,306 276,627 727,997
Schedule of sovereign risk	The detail at December 31, 2018, 2017 and 2016, by type of financial instrument, of the Group’s sovereign risk exposure to Europe’s peripheral countries and of the short positions held with them, taking into consideration the criteria established by the European Banking Authority (EBA) (See note 54) is as follows: Sovereign risk by country of issuer/borrower at December 31, 2018 (**) Million of euros (*) Debt instruments MtM Derivatives (****) Financial assets held for trading and Non-trading financial Financial financial assets assets at fair assets designated at value through mandatorily Financial Loans and fair value other at fair value assets at advances to Total net through profit Short comprehensive through amortised customers direct Indirect risk or loss positions income profit or loss cost (***) exposure Direct risk (CDS)s Spain 3,601 (2,458) 27,078 — 7,804 13,615 49,640 407 — Portugal 72 (115) 4,794 — 277 3,725 8,753 — — Italy 477 (681) — — 385 80 261 87 — Ireland — — — — — — — 2 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Information prepared under EBA standards. Also, there are government debt instruments on insurance companies balance sheets amounting to EUR 13,364 million (of which EUR 11,529 million, EUR 1,415 million, EUR 418 million and EUR 2 million relate to Spain, Portugal, Italy and Ireland, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 5,622 million (of which EUR 4,870 million, EUR 366 million and EUR 386 million to Spain, Portugal and Italy, respectively). (***) Presented without taking into account the valuation adjustments recognised (EUR 34 million). (****) “Other than CDSs" refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. Sovereign risk by country of issuer/borrower at December 31, 2017 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and Total net fair value assets Held-to- advances to direct through profit Short available Loans and maturity customers exposure Other than or loss positions for sale receivables investments (**) (****) CDSs CDSs Spain 6,940 (2,012) 37,748 1,585 1,906 16,470 62,637 (21) — Portugal 208 (155) 5,220 232 3 3,309 8,817 — — Italy 1,962 (483) 4,613 — — 16 6,108 (5) 5 (*) Information prepared under EBA standards. Also, there are government debt securities on insurance companies' balance sheets amounting to EUR 11,673 million (of which EUR 10,079 million, EUR 1,163 million and EUR 431 million relate to Spain, Portugal and Italy, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 3,596 million (EUR 3,010 million, EUR 146 million and EUR 440 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the Other comprehensive income recognised (EUR 31 million). (***) “Other than CDSs" refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. (****) EUR 19,601 million were included within the direct exposures of the balance sheet mainly from debt securities of Grupo Banco Popular. Sovereign risk by country of issuer/borrower at December 31, 2016 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and fair value assets Held-to- advances to Total net through profit Short available- Loans and maturity customers direct Other than or loss positions for-sale receivables investments (**) exposure CDSs CDSs Spain 8,943 (4,086) 23,415 1,516 1,978 14,127 45,893 (176) — Portugal 154 (212) 5,982 214 4 930 7,072 — — Italy 2,211 (758) 492 — — 7 1,952 (2) 2 (*) Information prepared under EBA standards. Also, there are government debt securities on insurance companies’ balance sheets amounting to EUR 10,502 million (of which EUR 9,456 million, EUR 717 million and EUR 329 million relate to Spain, Portugal and Italy, respectively) and off-balance-sheet exposure other than derivatives – contingent liabilities and commitments– amounting to EUR 5,449 million (EUR 5,349 million, EUR 91 million and EUR 9 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the Other comprehensive income recognised (EUR 27 million). (***) Other than CDSs refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. CDSs refers to the exposure to CDSs based on the location of the underlying.
Schedule of other counterparties risk	The detail of the Group's other exposure to other counterparties (private sector, central banks and other public entities that are not considered to be sovereign risks) in the aforementioned countries at December 31, 2018, 2017 and 2016 is as follows: Exposure to other counterparties by country of issuer/borrower at December 31, 2018 (****) Million of euros (*) Debt instruments Derivatives (***) Financial assets Financial assets at held for trading and fair value through Non-trading financial Loans and Balances Reverse financial assets other assets mandatorily at fair Financial assets advances to Total net with central repurchase designated at comprehensive value through profit or at amortised customers direct Other than banks agreements FVTPL income loss cost (**) exposure CDSs CDSs Spain 42,655 8,117 412 1,760 320 2,662 202,149 258,075 3,880 (6) Portugal 1,369 — 11 90 — 3,821 33,596 38,887 1,132 — Italy 51 6,296 84 635 — — 10,830 17,896 253 — Greece — — — — — — 80 80 28 — Ireland — — 21 1,093 16 25 10,633 11,788 127 — (*) See reconciliation of IAS39 as of December 31, 2017 to IFRS9 as of January 1, 2018 (Note 1.b). (**) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 76,691 million, EUR 8,158 million, EUR 5,193 million, EUR 200 million and EUR 850 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (***) Presented without taking into account valuation adjustments or impairment corrections (EUR 9,385 million). (****) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. Exposure to other counterparties by country of issuer/borrower at December 31, 2017 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and financial assets designated at Financial Loans and Total net Balances Reverse fair value assets Investments advances to direct with central repurchase through profit available-for- Loans and held-to- customers exposure Other than banks agreements or loss sale receivables maturity (*) (****) CDSs CDSs Spain 36,091 6,932 623 4,784 2,880 — 210,976 262,286 2,299 2 Portugal 761 178 160 764 4,007 106 35,650 41,626 1,416 — Italy 17 2,416 438 1,010 — — 10,015 13,896 211 5 Greece — — — — — — 56 56 30 — Ireland — — 20 476 584 — 1,981 3,061 79 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 81,072 million, EUR 8,936 million, EUR 4,310 million, EUR 200 million and EUR 714 million, of which Grupo Banco Popular EUR 15,460 million, to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented excluding Other comprehensive income and impairment losses recognised (EUR 10,653 million of which around EUR 3,986 of Grupo Banco Popular). (***) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying. (****) EUR 83,625 million were included within the direct exposures of the balance sheet mainly from debt securities of Grupo Banco Popular. Exposure to other counterparties by country of issuer/borrower at December 31, 2016 (*) Million of euros Debt instruments Derivatives (***) Financial assets held for trading and Financial assets designated at Financial Loans and Balances Reverse fair value assets Investments advances to Total net with central repurchase through profit available-for- Loans and held-to- customers direct Other than banks agreements or loss sale receivables maturity (*) exposure CDSs CDSs Spain 9,640 8,550 1,223 4,663 711 — 147,246 172,033 2,977 (16) Portugal 655 — 84 426 3,936 240 28,809 34,150 1,600 — Italy 26 — 818 732 — — 6,992 8,568 161 6 Greece — — — — — — 47 47 34 — Ireland — — 45 396 77 — 985 1,503 690 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 64,522 million, EUR 6,993 million, EUR 3,364 million, EUR 268 million and EUR 369 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented excluding Other comprehensive income and impairment losses recognised (EUR 8,692 million). (***) “Other than CDSs” refers to the exposure to derivatives based on the location of the counterparty, irrespective of the location of the underlying. “CDSs” refers to the exposure to CDSs based on the location of the underlying.
Schedule of credit default swaps	12/31/18 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 151 382 (231) (2) (4) (6) Portugal Sovereign 26 26 — — — — Other — — — — — — Italy Sovereign — 265 (265) — — — Other 205 75 130 (5) 5 — 12/31/17 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 324 499 (175) (3) 5 2 Portugal Sovereign 25 128 (103) (1) 1 — Other 1 1 — — — — Italy Sovereign 25 450 (425) — 5 5 Other 225 201 24 (3) 8 5 12/31/16 Million of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 534 751 (217) (3) (13) (16) Portugal Sovereign 28 290 (262) 1 (1) — Other — 6 (6) — — — Italy Sovereign 78 503 (425) — 2 2 Other 317 362 (45) (1) 7 6

Geographical and business seg_2

Geographical and business segment reporting (Tables)	12 Months Ended
	Dec. 31, 2018
Geographical and business segment reporting
Condensed balance sheets and income statements of geographical segments	Million of euros 2018 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 681,887 349,353 303,356 135,043 139,634 (150,002) 1,459,271 Loans and advances to customers 383,020 257,284 150,544 85,564 6,509 — 882,921 Cash, balances at central banks and credit institutions and other deposits on demand 142,813 39,843 60,721 16,442 6,141 (68,891) 197,069 Debt instruments 89,030 29,190 59,367 13,160 377 — 191,124 Other financial assets (*) 36,012 13,398 14,994 4,292 2,112 — 70,808 Other asset accounts (**) 31,012 9,638 17,730 15,585 124,495 (81,111) 117,349 Total Liabilities 642,479 332,137 276,095 118,532 51,557 (68,890) 1,351,910 Customer deposits 369,730 210,388 142,576 57,568 234 — 780,496 Central banks and credit institutions 158,762 33,429 48,103 16,504 1 (68,890) 187,909 Marketable debt securities 62,018 67,556 37,698 37,564 41,783 — 246,619 Other financial liabilities (***) 37,142 16,583 36,851 3,098 1,333 — 95,007 Other liabilities accounts (****) 14,827 4,181 10,867 3,798 8,206 — 41,879 Total Equity 39,408 17,216 27,261 16,511 88,077 (81,112) 107,361 Other customer funds under management 69,219 7,672 78,194 2,763 7 — 157,855 Investment funds 48,030 7,576 71,439 512 7 — 127,564 Pension funds 11,062 — 98 — — — 11,160 Assets under management 10,127 96 6,657 2,251 — — 19,131 Other non-managed marketed Customer funds 28,555 — 128 13,528 — — 42,211 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. Million of euros 2017 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 678,122 361,230 293,347 114,388 132,099 (134,881) 1,444,305 Loans and advances to customers 380,081 243,616 147,929 71,963 5,326 — 848,915 Cash, balances at central banks and credit institutions and other deposits on demand 114,965 56,762 56,087 13,300 400 (53,089) 188,425 Debt instruments 99,728 26,188 57,824 13,843 1,768 — 199,351 Other financial assets (*) 39,918 24,690 14,226 3,368 2,117 — 84,319 Other asset accounts (**) 43,430 9,974 17,281 11,914 122,488 (81,792) 123,295 Total Liabilities 636,784 344,926 264,415 99,189 45,247 (53,089) 1,337,472 Customer deposits 352,549 230,504 143,266 51,189 222 — 777,730 Central banks and credit institutions 159,794 27,833 39,613 15,884 279 (53,089) 190,314 Marketable debt securities 61,214 61,112 34,435 26,176 35,029 — 217,966 Other financial liabilities (***) 45,919 21,167 36,085 2,503 1,625 — 107,299 Other liabilities accounts (****) 17,308 4,310 11,016 3,437 8,092 — 44,163 Total Equity 41,338 16,304 28,932 15,199 86,852 (81,792) 106,833 Other customer funds under management 74,314 8,657 80,732 2,871 — — 166,574 Investment funds 52,319 8,543 74,435 452 — — 135,749 Pension funds 11,566 — — — — — 11,566 Assets under management 10,429 114 6,297 2,419 — — 19,259 Other non-managed marketed Customer funds 27,790 — 47 13,561 — — 41,398 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. Million of euros 2016 Continental United Latin United Corporate Intra-Group (Condensed) balance sheet Europe Kingdom America States centre eliminations Total Total Assets 520,134 354,960 320,768 137,391 132,154 (126,282) 1,339,125 Loans and advances to customers 297,214 251,251 152,187 85,389 4,429 — 790,470 Cash, balances at central banks and credit institutions and other deposits on demand 77,232 36,643 67,400 16,970 2,640 (47,744) 153,141 Debt instruments 80,639 28,045 63,314 17,940 1,374 — 191,312 Other financial assets (*) 40,689 26,819 18,696 3,566 2,803 — 92,573 Other asset accounts (**) 24,360 12,202 19,171 13,526 120,908 (78,538) 111,629 Total Liabilities 486,644 337,945 291,454 120,741 47,387 (47,745) 1,236,426 Customer deposits 269,934 212,113 143,747 64,460 857 — 691,111 Central banks and credit institutions 105,152 21,590 47,585 22,264 552 (47,745) 149,398 Marketable debt securities 53,064 71,108 47,436 26,340 30,921 — 228,869 Other financial liabilities (***) 49,042 27,913 41,395 2,907 2,633 — 123,890 Other liabilities accounts (****) 9,452 5,221 11,291 4,770 12,424 — 43,158 Total Equity 33,490 17,015 29,314 16,650 84,767 (78,537) 102,699 Other customer funds under management 65,834 8,564 81,034 3,828 — — 159,260 Investment funds 46,229 8,446 74,554 701 — — 129,930 Pension funds 11,298 — — — — — 11,298 Assets under management 8,307 118 6,480 3,127 — — 18,032 Other non-managed marketed Customer funds 7,790 — 448 14,999 10 — 23,247 (*) Including Trading derivatives and Equity instruments. (**) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Non-current assets held for sale, Assets under insurance or reinsurance contracts, tangible assets, intangible assets, tax assets, other assets and non-current assets held for sale. (***) Including Trading derivatives, Short positions and Other financial liabilities. (****) Including Hedging derivatives, Changes in the fair value of hedged items in portfolio hedges of interest risk, Liabilities under insurance or reinsurance contracts, provisions, tax liabilities, other liabilities and liabilities associated with non-current assets held for sale. The condensed income statements for the geographical segments are as follows: Million of euros 2018 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 10,107 4,136 15,654 5,391 (947) 34,341 Net fee income 4,419 1,023 5,253 859 (69) 11,485 Gains (losses) on financial transactions (*) 915 199 600 72 11 1,797 Other operating income (**) 441 62 (306) 627 (23) 801 Total income 15,882 5,420 21,201 6,949 (1,028) 48,424 Administrative expenses, depreciation and amortisation (8,279) (2,995) (7,995) (3,015) (495) (22,779) Net operating income (***) 7,603 2,425 13,206 3,934 (1,523) 25,645 Net loan-loss provisions (****) (1,399) (173) (4,567) (2,618) (116) (8,873) Other gains (losses) and provisions (*****) (703) (326) (667) (199) (100) (1,995) Operating profit/(loss) before tax 5,501 1,926 7,972 1,117 (1,739) 14,777 Tax on profit (1,461) (539) (2,904) (347) 21 (5,230) Profit from continuing operations 4,040 1,387 5,068 770 (1,718) 9,547 Net profit from discontinued operations — — — — — — Consolidated profit 4,040 1,387 5,068 770 (1,718) 9,547 Non-controlling interests 397 25 840 218 3 1,483 Attributable profit to the parent 3,643 1,362 4,228 552 (1,721) 8,064 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release EUR 113 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2017 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 9,230 4,364 15,984 5,569 (851) 34,296 Net fee income 4,167 1,003 5,494 971 (38) 11,597 Gains (losses) on financial transactions (*) 626 282 1,014 9 (227) 1,704 Other operating income (**) 394 67 30 410 (104) 797 Total income 14,417 5,716 22,522 6,959 (1,220) 48,394 Administrative expenses, depreciation and amortisation (7,661) (2,862) (8,720) (3,198) (476) (22,917) Net operating income (***) 6,756 2,854 13,802 3,761 (1,696) 25,477 Net loan-loss provisions (****) (1,109) (205) (4,972) (2,780) (45) (9,111) Other gains (losses) and provisions (*****) (746) (465) (1,330) (90) (182) (2,813) Operating profit/(loss) before tax 4,901 2,184 7,500 891 (1,923) 13,553 Tax on profit (1,316) (661) (2,386) (256) 31 (4,588) Profit from continuing operations 3,585 1,523 5,114 635 (1,892) 8,965 Net profit from discontinued operations — — — — — — Consolidated profit 3,585 1,523 5,114 635 (1,892) 8,965 Non-controlling interests 383 25 817 227 (3) 1,449 Attributable profit to the parent 3,202 1,498 4,297 408 (1,889) 7,516 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2016 Continental Latin United Corporate (Condesed) Underlying income statement Europe UK America States centre Total Net interest income 8,161 4,405 13,345 5,917 (739) 31,089 Net fee income 3,497 1,031 4,581 1,102 (31) 10,180 Gains (losses) on financial transactions (*) 818 319 806 22 (242) 1,723 Other operating income (**) 330 61 32 492 (53) 862 Total income 12,806 5,816 18,764 7,533 (1,065) 43,854 Administrative expenses, depreciation and amortisation (6,781) (2,967) (7,692) (3,197) (450) (21,087) Net operating income (***) 6,025 2,849 11,072 4,336 (1,515) 22,767 Net loan-loss provisions (****) (1,342) (58) (4,911) (3,208) 1 (9,518) Other gains (losses) and provisions (*****) (671) (340) (785) (90) (74) (1,960) Operating profit/(loss) before tax 4,012 2,451 5,376 1,038 (1,588) 11,289 Tax on profit (1,083) (735) (1,362) (357) 141 (3,396) Profit from continuing operations 2,929 1,716 4,014 681 (1,447) 7,893 Net profit from discontinued operations — — — — — — Consolidated profit 2,929 1,716 4,014 681 (1,447) 7,893 Non-controlling interests 330 36 628 286 (8) 1,272 Attributable profit to the parent 2,599 1,680 3,386 395 (1,439) 6,621 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations.
Schedule of condensed income statements of business segments	Million of euros 2018 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 32,523 2,378 420 (33) (947) 34,341 Net fee income 8,945 1,512 1,097 — (69) 11,485 Gains (losses) on financial transactions (*) 720 1,004 62 — 11 1,797 Other operating income (**) 645 193 (37) 23 (23) 801 Total income 42,833 5,087 1,542 (10) (1,028) 48,424 Administrative expenses, depreciation and amortisation (19,256) (2,105) (729) (194) (495) (22,779) Net operating income (***) 23,577 2,982 813 (204) (1,523) 25,645 Net loan-loss provisions (****) (8,461) (217) (9) (70) (116) (8,873) Other gains (losses) and provisions (*****) (1,707) (108) (7) (73) (100) (1,995) Operating profit/(loss) before tax 13,409 2,657 797 (347) (1,739) 14,777 Tax on profit (4,329) (792) (234) 104 21 (5,230) Profit from continuing operations 9,080 1,865 563 (243) (1,718) 9,547 Net profit from discontinued operations — — — — — — Consolidated profit 9,080 1,865 563 (243) (1,718) 9,547 Non-controlling interests 1,287 160 35 (2) 3 1,483 Attributable profit to the parent 7,793 1,705 528 (241) (1,721) 8,064 The condensed income statements are as follows: (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement. Additionally, includes a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks included in the line provisions or reversal of provisions, net of the statutory income statement. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations Million of euros 2017 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 32,339 2,442 404 (38) (851) 34,296 Net fee income 9,306 1,627 700 2 (38) 11,597 Gains (losses) on financial transactions (*) 681 1,212 38 — (227) 1,704 Other operating income (**) 580 222 70 29 (104) 797 Total income 42,906 5,503 1,212 (7) (1,220) 48,394 Administrative expenses, depreciation and amortisation (19,677) (2,028) (528) (208) (476) (22,917) Net operating income (***) 23,229 3,475 684 (215) (1,696) 25,477 Net loan-loss provisions (****) (8,278) (690) (9) (88) (46) (9,111) Other gains (losses) and provisions (*****) (2,395) (72) (8) (157) (181) (2,813) Operating profit/(loss) before tax 12,556 2,713 667 (460) (1,923) 13,553 Tax on profit (3,843) (750) (165) 139 31 (4,588) Profit from continuing operations 8,713 1,963 502 (321) (1,892) 8,965 Net profit from discontinued operations — — — — — — Consolidated profit 8,713 1,963 502 (321) (1,892) 8,965 Non-controlling interests 1,258 183 24 (13) (3) 1,449 Attributable profit to the parent 7,455 1,780 478 (308) (1,889) 7,516 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement. Additionally, includes a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks included in the line provisions or reversal of provisions, net of the statutory income statement. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Million of euros 2016 Corporate & Real Estate Retail Investment Wealth Activity in Corporate (Condensed) Underlying income statement Banking Banking Management Spain centre Total Interest income/ (charges) 28,914 2,528 429 (43) (739) 31,089 Net fee income 8,206 1,407 597 1 (31) 10,180 Gains (losses) on financial transactions (*) 668 1,256 32 9 (242) 1,723 Other operating income (**) 536 289 18 72 (53) 862 Total income 38,324 5,480 1,076 39 (1,065) 43,854 Administrative expenses, depreciation and amortisation (18,036) (1,917) (473) (211) (450) (21,087) Net operating income (***) 20,288 3,563 603 (172) (1,515) 22,767 Net loan-loss provisions (****) (8,673) (658) (22) (167) 2 (9,518) Other gains (losses) and provisions (*****) (1,682) (76) (5) (122) (75) (1,960) Operating profit/(loss) before tax 9,933 2,829 576 (461) (1,588) 11,289 Tax on profit (2,734) (787) (153) 137 141 (3,396) Profit from continuing operations 7,199 2,042 423 (324) (1,447) 7,893 Net profit from discontinued operations — — — — — — Consolidated profit 7,199 2,042 423 (324) (1,447) 7,893 Non-controlling interests 1,089 174 14 3 (8) 1,272 Attributable profit to the parent 6,110 1,868 409 (327) (1,439) 6,621 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement. Additionally, includes a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks included in the line provisions or reversal of provisions, net of the statutory income statement. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations.
Schedule of reconciliation of consolidated profit after tax to operating profit before tax	Million of euros 2018 Underlying Statutory Reconciliation of underlying results to statutory results results Adjustments results Interest income/ (charges) 34,341 — 34,341 Net fee income 11,485 — 11,485 Gains (losses) on financial transactions (*) 1,797 — 1,797 Other operating income (**) 801 — 801 Total income 48,424 — 48,424 Administrative expenses, depreciation and amortisation (22,779) — (22,779) Net operating income (***) 25,645 — 25,645 Net loan-loss provisions (****) (8,873) — (8,873) Other gains (losses) and provisions (*****) (1,995) (576) (2,571) Operating profit/(loss) before tax 14,777 (576) 14,201 Tax on profit (5,230) 344 (4,886) Consolidated profit 9,547 (232) 9,315 Non-controlling interests 1,483 22 1,505 Attributable profit to the parent 8,064 (254) 7,810 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 113 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except for a release of 113 million euros mainly corresponding to results from commitments and contingent risks, Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations. Explanation of adjustments: - Restructuring costs: The net impact of EUR -300 million on Profit attributable to the Parent, relates to restructuring costs in connection with the integration of Banco Popular Español, S.A.U., as follows EUR -280 million in Spain, EUR -40 million in corporate centre and EUR 20 million in Portugal. The corresponding gross impacts are reflected on the “Other gains (losses) and provisions” line above. - Negative goodwill in Poland: The negative goodwill of EUR 45 million, relates to the acquisition of the banking and private banking business of Deutsche Bank Polska, S.A. Million of euros 2017 Underlying Statutory Reconciliation of underlying results to statutory results results Adjustments results Interest income/ (charges) 34,296 — 34,296 Net fee income 11,597 — 11,597 Gains (losses) on financial transactions (*) 1,704 (39) 1,665 Other operating income (**) 797 — 797 Total income 48,394 (39) 48,355 Administrative expenses, depreciation and amortisation (22,917) (76) (22,993) Net operating income (***) 25,477 (115) 25,362 Net loan-loss provisions (****) (9,111) (98) (9,209) Other gains (losses) and provisions (*****) (2,813) (1,249) (4,062) Operating profit/(loss) before tax 13,553 (1,462) 12,091 Tax on profit (4,588) 704 (3,884) Consolidated profit 8,965 (758) 8,207 Non-controlling interests 1,449 139 1,588 Attributable profit to the parent 7,516 (897) 6,619 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 50 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except for a release of 50 million euros mainly corresponding to results from commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations Explanation of adjustments - Allfunds Bank, S.A. sale: corresponds to the sale by the Bank and its partners of 100% of Allfunds Bank, S.A. capital, obtaining an amount of EUR 501 million from the sale of its 25% stake in Allfunds Bank, S.A., resulting in gains of EUR 425 million recognised in “Other gains (losses) and provisions” and of EUR 297 million net of tax. - Restructuring Costs and equity impairments: relates to the charge of EUR -425 million on “Other gains (losses) and provisions” (EUR -300 million net of tax) for the integration of Banco Popular Español, S.A.U. into the group and an additional charge of EUR -125 million on “Other gains (losses) and provisions” (EUR -85 million after tax effect) mainly related to commercial networks in Germany. During 2017, an additional impairment on equity investment and intangible assets held by the Group has been accounted for a value of EUR -130 million on “Other gains (losses) and provisions”, with no tax effect. - Goodwill Impairment: impairment of goodwill associated with Santander Consumer USA Holdings, Inc. This impairment had a gross impact of EUR -899 million on “Other gains (losses) and provisions” line (EUR -603 million in Profit attributable to the parent). - US Tax Reform and other impairments: the adjustment primarily corresponds to net impacts of the tax reform in the United States together with other expenses related to provisions for hurricanes and other provisions in the year 2017. The net impact of these adjustments in Profit attributable to the parent adds EUR -76 million. Million of euros 2016 Underlying Statutory Reconciliation of underlying results to statutory results results Adjustments results Interest income/ (charges) 31,089 — 31,089 Net fee income 10,180 — 10,180 Gains (losses) on financial transactions (*) 1,723 378 2,101 Other operating income (**) 862 — 862 Total income 43,854 378 44,232 Administrative expenses, depreciation and amortisation (21,087) (14) (21,101) Net operating income (***) 22,767 364 23,131 Net loan-loss provisions (****) (9,518) — (9,518) Other gains (losses) and provisions (*****) (1,960) (885) (2,845) Operating profit/(loss) before tax 11,289 (521) 10,768 Tax on profit (3,396) 114 (3,282) Consolidated profit 7,893 (407) 7,486 Non-controlling interests 1,272 10 1,282 Attributable profit to the parent 6,621 (417) 6,204 (*) Gains (losses) on financial transactions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net, Gain or losses on financial assets and liabilities held for trading, net, Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, net, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net and Exchange differences, net. (**) Other operating income includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Dividend income; Income from companies accounted for using the equity method, Other operating income, Other operating expenses, Income from assets under insurance or reinsurance contracts and Expenses from liabilities under insurance or reinsurance contracts. (***) Net Operating Income is used for the Group’s internal reporting and management reporting purposes but is not a line item in the statutory consolidated income statement. (****) Net loan-loss provisions refers to Impairment or reversal of impairment at financial assets not measured at fair value through profit or loss and net gains and losses from changes line item in the statutory income statement – reclassification of financial assets at amortised cost. Additionally, includes a release of EUR 108 million mainly corresponding to the results by commitments and contingent risks includes in the line of the statutory income statement of provisions or reversal of provisions. (*****) Other gains (losses) and provisions includes the following line items in the statutory income statement, which are presented net for internal reporting and management reporting purposes: Provisions or reversal of provisions except a release of 108 million euros mainly corresponding to results from commitments and contingent risks; Impairment of investments in joint ventures and associates, net; Impairment on non-financial assets, net; Gains or losses on non-financial assets, net; Negative goodwill recognised in results and Gains or losses on non-current assets held for sale not classified as discontinued operations.

Related parties (Tables)

Related parties (Tables)	12 Months Ended
	Dec. 31, 2018
Related parties
Schedule of related party transactions	Million of euros 2018 2017 2016 Members Members Members Associates of the Other Associates of the Other Associates of the Other and joint board of Executive related and joint board of Executive related and joint board of Executive related ventures directors vicepresidents parties ventures directors vicepresidents parties ventures directors vicepresidents parties Assets: 7,202 — 30 256 6,048 — 21 300 5,884 — 22 307 Loans and advances: credit institutions 704 — — — 472 — — — 223 — — - Loans and advances: customers 6,142 — 30 256 5,081 — 21 279 5,209 — 22 286 Debt instruments 295 — — — 473 — — 21 452 — — 21 Others 61 — — — 22 — — — — — — — Liabilities: 1,650 19 12 363 748 19 14 63 824 27 10 124 Financial liabilities: credit institutions 8 — — — 309 — — — 155 — — — Financial liabilities: customers 1,596 19 12 363 414 19 14 63 669 27 10 124 Marketable debt securities 8 — — — 4 — — — — — — — Others 38 — — — 21 — — — — — — — Income statement: 993 — — 31 1,020 — — 14 609 — — 13 Interest income 73 — — 14 57 — — 8 67 — — 10 Interest expense (3) — — (1) (3) — — — (15) — — (1) Gains/losses on financial assets and liabilities and others 82 — — — 302 — — — 15 — — — Commission income 853 — — 18 735 — — 6 561 — — 4 Commission expense (12) — — — (71) — — — (19) — — — Other: 4,707 9 3 782 3,881 7 3 597 4,146 1 3 846 Contingent liabilities and others 21 7 1 508 6 6 1 352 19 — — 139 Contingent commitments 393 1 2 64 301 1 2 60 17 1 3 417 Derivative financial instruments 4,293 1 — 210 3,574 — — 185 4,110 — — 290

Risk management (Tables)

Risk management (Tables)	12 Months Ended
	Dec. 31, 2018
Risk management
Main credit risk aggregates arising on customer business	Credit risk with customers (*) (million of euros) Non-performing loans NPL ratio (%) 2018 2017 2016 2018 2017 2016 2018 2017 2016 Continental Europe 429,454 424,248 331,706 22,537 24,674 19,638 5.25 5.82 5.92 Spain 239,479 251,433 172,974 14,833 15,880 9,361 6.19 6.32 5.41 Santander Consumer Finance 97,922 92,589 88,061 2,244 2,319 2,357 2.29 2.50 2.68 Portugal 38,340 39,394 30,540 2,279 2,959 2,691 5.94 7.51 8.81 Poland 30,783 24,391 21,902 1,317 1,114 1,187 4.28 4.57 5.42 UK 262,196 247,625 255,049 2,755 3,295 3,585 1.05 1.33 1.41 Latin América 171,898 167,516 173,150 7,461 7,464 8,333 4.34 4.46 4.81 Brazil 84,212 83,076 89,572 4,418 4,391 5,286 5.25 5.29 5.90 Mexico 33,764 28,939 29,682 822 779 819 2.43 2.69 2.76 Chile 41,268 40,406 40,864 1,925 2,004 2,064 4.66 4.96 5.05 Argentina 5,631 8,085 7,318 179 202 109 3.17 2.50 1.49 US 92,152 77,190 91,709 2,688 2,156 2,088 2.92 2.79 2.28 Santander Bank, National Association 51,049 44,237 54,040 450 536 717 0.88 1.21 1.33 Santander Consumer USA 26,424 24,079 28,590 2,043 1,410 1,097 7.73 5.86 3.84 Group Total 958,153 920,968 855,510 35,692 37,596 33,643 3.73 4.08 3.93 (*) Includes gross lending to customers, guarantees and documentary credits.
Schedule of exposure and impairment losses by stage	Exposure and impairment losses by stage (Million of euros) Credit Quality (*) Stage 1 Stage 2 Stage 3 Total Investment grade 685,507 7,176 — 692,683 Speculation grade 222,495 47,439 — 269,935 Default — — 30,795 30,795 Total Risk (**) 908,002 54,616 30,795 993,412 Impairment losses 3,823 4,644 12,504 20,970 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of maturity analysis of assets and guarantees received and committed	>1month >3months >1year >2years 3years 5years Residual maturities of the liabilities unmatured <=1month <=3months <=12months <=2years <=3years <=5years <=10years >10years TOTAL Committed assets 28.5 53.7 11.9 29.0 78.6 55.4 28.1 20.4 16.5 322.2 Guarantees received 24.6 15.8 10.7 10.3 1.8 1.8 1.7 1.8 1.1 69.6
Schedule of on and off-balance sheet assets provided as security in transactions to obtain liquidity	On-balance-sheet encumbered assets Carrying Fair Value of Fair Value of amount of non- ‑ Carrying amount of encumbered non-encumbered encumbered Thousand of million of euros encumbered assets assets assets assets Loans and advances 214.6 855.0 — Equity instruments 4.2 4.2 10.7 10.7 Debt securities 76.3 76.3 114.8 114.8 Other assets 27.1 156.6 — Total assets 322.2 1,137.1 — Encumbrance of collateral received Fair value of Fair value of collateral received encumbered or own debt collateral received securities issued or own debt available for Thousand of million of euros securities issued encumbrance Collateral received 69.6 48.9 Loans and advances — — Equity instruments 2.7 6.0 Debt securities 65.0 42.9 Other collateral received 1.9 — Own debt securities issued other than own covered bonds or ABSs — 1.4 Encumbered assets and collateral received and matching liabilities Assets, collateral received Matching liabilities, and own debt securities contingent liabilities or issued other than covered bonds Thousand of million of euros securities lent and ABSs encumbered Total sources of encumbrance (carrying amount) 301.6 391.8
Schedule of regulatory capital	Reconciliation of accounting capital with regulatory capital (Million of euros) 2018 2017 Subscribed capital 8,118 8,068 Share premium account 50,993 51,053 Reserves 53,988 52,577 Treasury shares (59) (22) Attributable profit 7,810 6,619 Approved dividend (2,237) (2,029) Shareholders’ equity on public balance sheet 118,613 116,265 Valuation adjustments (22,141) (21,777) Non-controlling interests 10,889 12,344 Total Equity on public balance sheet 107,361 106,833 Goodwill and intangible assets (28,644) (28,537) Eligible preference shares and participating securities 9,754 7,635 Accrued dividend (1,055) (968) Other adjustments (*) (9,700) (7,679) Tier 1 (Phase-in) 77,716 77,283 (*) Fundamentally for non-computable non-controlling interests and deductions and reasonable filters in compliance with CRR. The following table shows the Phase-in capital coefficients and a detail of the eligible internal resources of the Group: 2018 2017 Capital coefficients Level 1 ordinary eligible capital (million of euros) 67,962 74,173 Level 1 additional eligible capital (million of euros) 9,754 3,110 Level 2 eligible capital (million of euros) 11,009 13,422 Risk-weighted assets (million of euros) 592,319 605,064 Level 1 ordinary capital coefficient (CET 1) 11.47 % 12.26 % Level 1 additional capital coefficient (AT1) 1.65 % 0.51 % Level 1 capital coefficient (TIER1) 13.12 % 12.77 % Level 2 capital coefficient (TIER 2) 1.86 % 2.22 % Total capital coefficient 14.98 % 14.99 % Eligible capital (Million of euros) 2018 2017 Eligible capital Common Equity Tier I 67,962 74,173 Capital 8,118 8,068 (-) Treasure shares and own shares financed (64) (22) Share Premium 50,993 51,053 Reserves 55,036 52,241 Other retained earnings (23,022) (22,363) Minority interests 6,981 7,991 Profit net of dividends 4,518 3,621 Deductions (34,598) (26,416) Goodwill and intangible assets (28,644) (22,829) Others (5,954) (3,586) Additional Tier I 9,754 3,110 Eligible instruments AT1 9,666 8,498 T1-excesses-subsidiaries 88 347 Residual value of dividends — (5,707) Others — (27) Tier II 11,009 13,422 Eligible instruments T2 11,306 9,901 Gen. funds and surplus loans loss prov. IRB — 3,823 T2-excesses - subsidiaries (297) (275) Others — (27) Total eligible capital 88,725 90,706
Schedule of leverage capital and ratios	Million of euros 12/31/18 12/31/17 Leverage Level 1 Capital 77,716 77,283 Exposure 1,489,094 1,463,090 Leverage Ratio 5.22 % 5.28 %
Forborne loan portfolio
Risk management
Schedule of exposure to risk	12/31/18 Total Of which: Non-performing/Doubtful Impairment Impairment Without real guarantee With real guarantee of Without real guarantee With real guarantee of Maximum amount of the accumulated Maximum amount of the accumulated actual collateral that can value or actual collateral that can value or be considered. accumulated be considered. accumulated Amounts in million of euros, except Real Rest of losses in fair Real Rest of losses in fair number of transactions that are in Number of Gross Number of Gross estate real value due to Number of Gross Number of Gross estate real value due to units. transactions amount transactions amount guarantee guarantees credit risk transactions amount transactions amount guarantee guarantees credit risk Credit entities — — — — — — — — — — — — — — Public sector 37 76 16 18 11 4 6 13 7 9 4 4 — 2 Other financial institutions and: individual shareholder 265 11 135 38 16 15 10 110 3 75 16 9 — 9 Non-financial institutions and individual shareholder 187,192 7,383 44,452 13,039 8,116 1,321 6,339 121,445 4,669 26,122 8,156 5,058 689 5,851 Of which: financing for constructions and property development 426 313 1,889 1,932 1,600 30 620 328 245 1,369 1,329 1,038 28 594 Other warehouses 1,578,622 3,476 824,591 17,193 7,905 4,016 4,352 874,840 1,668 181,469 5,834 3,505 823 2,772 Total 1,766,116 10,946 869,194 30,288 16,048 5,356 10,707 996,408 6,347 207,675 14,010 8,576 1,512 8,634 Financing classified as non-current assets and disposable groups of items that have been classified as held for sale — — — — — — — — — — — — — —
Schedule of changes in loss allowance and gross carrying amount	Million of euros 2018 2017 Beginning balance 36,164 37,365 Refinancing and restructuring of the period 10,191 12,675 Memorandum item: impact recorded in the income statement for the period 2,659 2,406 Debt repayment (11,126) (9,107) Foreclosure (731) (950) Derecognised from the consolidated balance sheet (3,660) (5,334) Others variations (311) 1,515 Balance at end of year 30,527 36,164
Foreclosed Properties [Member]
Risk management
Schedule of exposure to risk	12/31/18 Of which: impairment Gross losses on assets carrying Valuation since time of Carrying Million of euros amount adjustments foreclosure amount Property assets arising from financing provided to construction and property development companies 7,909 4,133 2,733 3,776 Of which: Completed buildings 3,194 1,202 706 1,992 Residential 1,247 451 211 796 Other 1,947 751 495 1,196 Buildings under construction 299 131 81 168 Residential 287 128 81 159 Other 12 3 — 9 Land 4,416 2,800 1,946 1,616 Developed land 1,616 997 597 619 Other land 2,800 1,803 1,349 997 Property assets from home purchase mortgage loans to households 2,016 851 357 1,165 Other foreclosed property assets 408 123 52 285 Total property assets 10,333 5,107 3,142 5,226
Schedule of changes in loss allowance and gross carrying amount	Thousand of Million of euros (*) 2018 2017 2016 Gross additions 0.8 1.4 1.3 Disposals (1.8) (1.9) (1.3) Difference (1.0) (0.5) — (*) Without considering the Blackstone transaction (See Note 3).
Real estate operations in Spain
Risk management
Schedule of exposure to risk	12/31/18 Excess over collateral Specific Million of euros Gross amount value allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 4,812 834 532 Of which: watchlist/ non-performing 1,327 393 468 Memorandum items: Written-off assets 3,675 — — 12/31/18 Memorandum items: data from the public consolidated balance sheet Carrying Million of euros amount Total loans and advances to customers excluding the Public sector (business in Spain) 223,921 Total consolidated assets (Total business) (Book value) 1,459,271 Impairment losses and credit risk allowances. Coverage for unimpaired assets (business in Spain) 1,244
Schedule of changes in loss allowance and gross carrying amount	Million of euros 12/31/18 12/31/17 12/31/16 Balance at beginning of year 6,472 5,515 7,388 Foreclosed assets (100) (27) (28) Banco Popular (perimeter) — 2,934 — Reductions (*) (1,267) (1,620) (1,415) Written-off assets (293) (330) (430) Balance at end of year 4,812 6,472 5,515 (*) Includes portfolio sales, cash recoveries and third-party subrogations and new production.
Disclosure of concentrations	Loans: gross amount Million of euros 12/31/18 1. Without mortgage guarantee 379 2. With mortgage guarantee 4,433 2.1 Completed buildings 2,691 2.1.1 Residential 1,328 2.1.2 Other 1,363 2.2 Buildings and other constructions under construction 1,071 2.2.1 Residential 609 2.2.2 Other 462 2.3 Land 671 2.3.1 Developed consolidated land 480 2.3.2 Other land 191 Total 4,812
Corporate And Investment Banking Segment [Member]
Risk management
Schedule of evolution projection based on main macroeconomic indicators	2019-2023 Pessimistic Base Optimistic Magnitudes scenario scenario scenario Global GDP Growth 2.7 % 3.6 % 4.2 %
Schedule of weights used for current political and economic positions	Pessimistic scenario 20 % Base scenario 60 % Optimistic scenario 20 %
SPAIN
Risk management
Schedule of exposure and impairment losses by stage	Exposure and impairment losses per stage (Million of euros) Credit Quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 289 — Speculation grade 25,108 12,603 — 37,711 Default — — 14,941 14,941 Total Exposure (**) 12,892 14,941 Impairment losses 366 768 5,565 6,699 (*) Detail of credit quality calculated for the purposes of Grupo Santander’s management (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of evolution projection based on main macroeconomic indicators	2019-2023 Pessimistic Base Optimistic Magnitudes scenario scenario scenario Interest rate 0.30 % 0.70 % 1.20 % Unemployment rate 15.30 % 12.30 % 10.80 % Housing price change 0.50 % 2.20 % 3.80 % GDP growth 1.10 % 1.80 % 2.60 %
Schedule of weights used for current political and economic positions	Pessimistic scenario 30 % Base scenario 40 % Optimistic scenario 30 %
SPAIN | Home purchase loans
Risk management
Schedule of exposure to risk	12/31/2018 Gross Of which: In million of euros amount non - performing Home purchase loans to families 63,290 2,493 Without mortgage guarantee 545 54 With mortgage guarantee 62,745 2,439
Disclosure of concentrations	12/31/18 Loan to value ratio More than More than More than 40% and 60% and 80% and Less than or less than less than less than or More than In million of euros equal to 40% 60% 80% equal to 100% 100% Total Gross amount 15,393 18,448 18,484 6,408 4,012 62,745 Of which: watchlist /non-performing 239 366 584 479 771 2,439
Credit risk
Risk management
Disclosure of concentrations	12/31/18 Other EU Rest of the Million of euros Total Spain countries America world Central banks and Credit institutions 244,523 60,562 94,532 75,460 13,969 Public sector 177,207 64,528 38,112 67,943 6,624 Of which: Central government 157,656 53,060 34,497 63,490 6,609 Other central government 19,551 11,468 3,615 4,453 15 Other financial institutions (financial business activity) 102,985 16,378 54,473 25,751 6,383 Non-financial companies and individual entrepeneurs (non-financial business activity) (broken down by purpose) 383,708 126,503 117,261 126,098 13,846 Of which: Construction and property development 27,699 5,578 4,674 17,311 136 Civil engineering construction 5,606 3,352 1,642 595 17 Large companies 220,192 56,547 72,406 78,850 12,389 SMEs and individual entrepreneurs 130,211 61,026 38,539 29,342 1,304 Households – other (broken down by purpose) 491,836 89,407 276,667 116,686 9,076 Of which: Residential 314,048 62,232 210,218 40,696 902 Consumer loans 156,806 18,065 64,258 68,872 5,611 Other purposes 20,982 9,110 2,191 7,118 2,563 Total (*) 1,400,259 357,378 581,045 411,938 49,898 (*) For the purposes of this table, the definition of risk includes the following items in the public balance sheet: Loans and advances to credit institutions, Loans and advances to Central Banks, Loans and advances to Customers, Debt Instruments, Equity Instruments, trading Derivatives, Hedging derivatives, Investments and financial guarantees given.
Sovereign Risk
Risk management
Schedule of exposure to risk	Million of euros 12/31/18 Portfolio Non-trading Financial assets financial assets Financial assets at fair value Financial mandatorily designated at fair through other assets at at fair value Total value through profit comprehensive amortised through net direct Country or loss income cost profit or loss exposure Spain 1,143 27,078 21,419 — 49,640 Portugal (43) 4,794 4,002 — 8,753 Italy (204) — 465 — 261 Greece — — — — — Ireland — — — — — Rest of eurozone 503 953 1,322 — 2,778 United Kingdom 1,013 1,190 8,666 — 10,869 Poland 2,015 9,203 11 — 11,229 Rest of Europe — 84 245 — 329 United States 426 6,138 2,113 5 8,682 Brazil 1,839 20,540 3,782 893 27,054 Mexico 3,320 4,279 2,816 — 10,415 Chile 160 1,596 20 — 1,776 Other American countries 103 340 450 — 893 Rest of the world — 5,688 534 — 6,222 Total 10,275 81,883 45,845 898 138,901
Trading market risk
Risk management
Schedule of exposure to risk	Balance sheet Main market risk metric Million of euros amount VaR Other Main risk factor for "Other" balance Assets subject to market risk Cash, cash balances at central banks and other deposits on demand 113,663 — 113,663 Interest rate Financial assets held for trading 92,879 92,140 739 Interest rate, spread Non-trading financial assets mandatorily at fair value through profit or loss 10,730 9,327 1,403 Interest rate, Equity market Financial assets designated at fair value through profit or loss 57,460 56,584 876 Interest rate Financial assets designated at fair value through other comprehensive income 121,091 — 121,091 Interest rate, spread Financial assets at amortised cost 946,099 — 946,099 Interest rate Hedging derivatives 8,607 8,586 21 Interest rate, exchange rate Changes in the fair value of hedged items in portfolio hedges of interest risk 1,088 — 1,088 Interest rate Other assets 107,654 — — Total Assets 1,459,271 — — Liabilities subject to market risk Financial liabilities held for trading 70,343 70,054 289 Interest rate, spread Financial liabilities designated at fair value through profit or loss 68,058 67,909 149 Interest rate Financial liabilities at amortised cost 1,171,630 — 1,171,630 Interest rate, spread Hedging derivatives 6,363 6,357 6 Interest rate, exchange Changes in the fair value of hedged items in portfolio hedges of interest rate risk 303 — 303 Interest rate Other liabilities 35,213 — — Total liabilities 1,351,910 Equity 107,361 — —
Disclosure of concentrations by risk factor	2018 2017 2016 Million of euros Min Average Max Latest Average Latest Average Latest Total 6.4 9.7 16.6 11.3 21.5 10.2 18.3 17.9 Diversification effect (3.3) (9.3) (18.7) (11.5) (8.0) (7.6) (10.3) (9.6) Interest rate 5.9 9.4 15.5 9.7 16.2 7.9 15.5 17.9 Equities 0.8 2.4 6.3 2.8 3.0 1.9 1.9 1.4 Exchange rate 1.6 3.9 11.4 6.2 6.6 3.3 6.9 4.8 Credit spread 1.0 3.4 13.0 4.1 3.6 4.6 4.2 3.3 Commodities 0.0 0.0
Structural risks
Risk management
Disclosure of concentrations by risk factor	2018 2017 2016 Min Average Max Latest Average Latest Average Latest Structural VaR 485.0 568.5 799.4 556.8 878.0 815.7 869.3 922.1 Diversification effect (319.7) (325.0) (355.4) (267.7) (337.3) (376.8) (323.4) (316.6) VaR interest rate (*) 301.3 337.1 482.5 319.5 373.9 459.6 340.6 327.2 VaR exchange rate 323.3 338.9 386.2 324.9 546.9 471.2 603.4 588.5 VaR equities 180.1 217.6 286.1 180.1 294.5 261.6 248.7 323.0 (*) Includes credit spread VaR on ALCO portfolios.
United Kingdom | Santander UK plc
Risk management
Schedule of exposure and impairment losses by stage	Exposure and impairment losses by stage (Million of euros) Credit Quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 225,929 1,900 — 227,829 Speculation grade 34,655 11,514 — 46,169 Default — — 2,795 2,795 Total Exposure (**) 260,584 13,415 2,795 276,793 Impairment losses 224 335 335 894 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of evolution projection based on main macroeconomic indicators	Pessimistic Pessimistic Base Optimistic Optimistic Magnitudes scenario 2 scenario 1 scenario scenario 1 scenario 2 Interest rate 2.30 % 2.50 % 1.50 % 1.30 % 1.00 % Unemployment rate 8.60 % 6.90 % 4.30 % 3.80 % 2.80 % Housing price change (9.50) % (2.00) % 2.00 % 2.30 % 3.40 % GDP growth 0.30 % 0.70 % 1.60 % 2.10 % 2.50 %
Schedule of weights used for current political and economic positions	Pessimistic scenario 2 10 % Pessimistic scenario 1 30 % Base scenario 40 % Optimistic scenario 1 15 % Optimistic scenario 2 5 %
United States | Santander Bank, National Association
Risk management
Schedule of exposure and impairment losses by stage	Exposure and impairment loss by stage (Million of euros) Credit quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 5,149 — — 5,149 Speculation grade 60,391 3,784 — 64,175 Default — — 448 448 Total Exposure (**) 65,540 3,784 448 69,772 Impairment losses 233 204 105 542 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of evolution projection based on main macroeconomic indicators	2019-2023 Favorable Base Unfavorable Magnitudes scenario scenario scenario Interest rate 1.30 % 2.80 % 3.60 % Unemployment rate 6.90 % 4.20 % 3.80 % House price change 2.20 % 3.90 % 3.90 % GDP growth 1.50 % 2.10 % 2.80 %
Schedule of weights used for current political and economic positions	Unfavourable scenario 20 % Base scenario 60 % Favourable scenario 20 %
United States | Santander Consumer USA Holdings Inc.
Risk management
Schedule of exposure and impairment losses by stage	Exposure and impairment losses by stage (Million of euros) Credit Quality (*) Stage 1 Stage 2 Stage 3 Total Investment grade 224 — — 224 Speculation grade 20,313 6,600 — 26,913 Default — — 2,218 2,218 Total Exposure (**) 20,537 6,600 2,218 29,355 Impairment losses 824 1,720 667 3,211 (*) Detail of credit quality ratings calculated for Group management purposes (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of evolution projection based on main macroeconomic indicators	2019-2023 Pessimistic Base Optimistic Magnitudes scenario scenario scenario Interest rate 1.30 % 2.80 % 3.60 % Unemployment rate 6.90 % 4.20 % 3.80 % Housing price growth 2.20 % 3.90 % 3.90 % GDP Growth 1.50 % 2.10 % 2.80 %
Schedule of weights used for current political and economic positions	Pessimistic scenario % Base scenario % Optimistic scenario %
Latin America | BRAZIL
Risk management
Schedule of exposure and impairment losses by stage	Exposure and impairment losses (Million of euros) Credit Quality(*) Stage 1 Stage 2 Stage 3 Total Investment grade 51,150 472 — 51,622 Speculation grade 56,884 5,334 — 62,218 Default — — 4,223 4,223 Total Exposure (**) 108,034 5,806 4,223 118,063 Impairment losses 997 768 2,889 4,654 (*) Detail of credit quality ratings calculated for Group management purposes. (**) Amortised cost assets + Loans and advances + loan commitments granted.
Schedule of evolution projection based on main macroeconomic indicators	2019-2023 Pessimistic Base Optimistic Magnitudes scenario scenario scenario Interest rate 11.00 % 7.70 % 6.00 % Unemployment rate 16.30 % 9.90 % 8.60 % Housing price c (1.40) % 4.30 % 5.90 % GDP Growth (1.20) % 2.40 % 3.50 %
Schedule of weights used for current political and economic positions	Pessimistic scenario 10 % Base scenario 80 % Optimistic scenario 10 %

Additional disclosures (Tables)

Additional disclosures (Tables)	12 Months Ended
	Dec. 31, 2018
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Condensed Balance Sheet [Table Text Block]	CONDENSED BALANCE SHEETS (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) Assets Cash and due from banks 105,660 76,690 49,979 Of which: To bank subsidiaries 16,339 20,818 11,442 Trading account assets 70,825 64,326 70,437 Investment securities 61,064 49,194 45,702 Of which: To bank subsidiaries 11,084 6,474 8,326 To non-bank subsidiaries 4,581 3,729 3,662 Net Loans and leases 263,142 197,591 195,532 Of which: To non-bank subsidiaries 26,505 33,113 35,085 Investment in affiliated companies 81,734 85,428 80,614 Of which: To bank subsidiaries 69,118 65,567 63,210 To non-bank subsidiaries 12,616 19,861 17,404 Premises and equipment, net 2,410 1,929 1,834 Other assets 23,541 17,257 17,146 Total assets 608,376 492,415 461,244 Liabilities Deposits 350,786 256,389 265,565 Of which: To bank subsidiaries 18,526 20,391 19,179 To non-bank subsidiaries 13,655 13,115 40,082 Short-term debt 30,883 40,540 19,110 Long-term debt 75,600 53,023 34,499 Total debt 106,483 93,563 53,609 Of which: To bank subsidiaries 2,874 1,138 — To non-bank subsidiaries 998 2,966 14,062 Other liabilities 82,340 71,896 78,835 Total liabilities 539,609 421,848 398,009 Stockholders' equity Capital stock 8,118 8,068 7,291 Retained earnings and other reserves 60,649 62,499 55,944 Total stockholders' equity 68,767 70,567 63,235 Total liabilities and Stockholders’ Equity 608,376 492,415 461,244
Condensed Income Statement [Table Text Block]	Year ended CONDENSED STATEMENTS OF INCOME (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) Interest income Interest from earning assets 7,660 5,733 6,023 Dividends from affiliated companies 3,872 3,320 3,459 Of which: From bank subsidiaries 2,874 2,580 2,686 From non-bank subsidiaries 998 740 773 11,532 9,053 9,482 Interest expense (3,861) (3,204) (3,113) Interest income / (Charges) 7,671 5,849 6,369 Provision for credit losses (686) (451) (528) Interest income / (Charges) after provision for credit losses 6,985 5,398 5,841 Non-interest income: 3,972 3,872 3,403 Non-interest expense: (7,573) (6,293) (7,115) Income before income taxes 3,384 2,977 2,129 Income tax expense (83) 29 352 Net income 3,301 3,006 2,481
Condensed Statement of Comprehensive Income [Table Text Block]	CONDENSED STATEMENTS OF Year ended COMPREHENSIVE INCOME (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) NET INCOME 3,301 3,006 2,481 OTHER COMPREHENSIVE INCOME (410) (356) 364 Items that may be reclassified subsequently to profit or loss (348) (341) 439 Available-for-sale financial assets: (634) (625) 619 Revaluation gains/(losses) (135) (283) 830 Amounts transferred to income statement (499) (342) (211) Other reclassifications — — — Cash flow hedges: 137 (7) 4 Revaluation gains/(losses) 153 (7) 4 Amounts transferred to income statement (16) — — Amounts transferred to initial carrying amount of hedged items — — — Other reclassifications — — — Hedges of net investments in foreign operations: — — — Revaluation gains/(losses) — — — Amounts transferred to income statement — — — Other reclassifications — — — Exchange differences: — — — Non-current assets held for sale: — — — Income tax 149 291 (184) Items that will not be reclassified to profit or loss: (62) (15) (75) Actuarial gains/(losses) on pension plans 43 (23) (106) Rest of valuation adjustments (78) — — Income tax (27) 8 31 TOTAL COMPREHENSIVE INCOME 2,891 2,650 2,845
Condensed Cash Flow Statement [Table Text Block]	CONDENSED CASH FLOW STATEMENTS Year ended (Parent company only) December 31, 2018 December 31, 2017 December 31, 2016 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 3,301 3,006 2,481 Adjustments to profit 11,576 1,824 1,245 Net increase/decrease in operating assets (17,566) (10,430) 36,393 Net increase/decrease in operating liabilities 13,411 21,915 (36,632) Reimbursements/payments of income tax (279) (839) 151 Total net cash flows from operating activities (1) 10,443 15,476 3,638 2. Cash flows from investing activities Investments (-) (1,472) (8,818) (4,419) Divestments (+) 10,197 4,995 7,249 Total net cash flows from investment activities (2) 8,725 (3,823) 2,830 3. Cash flows from financing activities Issuance of own equity instruments — 7,072 — Disposal of own equity instruments 805 1,004 957 Acquisition of own equity instruments (816) (972) (943) Issuance of debt securities 2,750 2,894 2,346 Redemption of debt securities (827) (764) (5,333) Dividends paid (3,118) (2,665) (2,308) Issuance/Redemption of equity instruments — — — Other collections/payments related to financing activities (2) 532 — Total net cash flows from financing activities (3) (1,208) 7,101 (5,281) 4. Effect of exchange rate changes on cash and cash equivalents (4) 237 (655) 289 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) 18,197 18,099 1,476 Cash and cash equivalents at beginning of period 33,734 15,635 14,159 Cash and cash equivalents at end of period 51,931 33,734 15,635
Schedule of preferred shares and securities	2018 2017 2016 (Millions of Euros) Preference shares 345 404 413 Preferred securities 9,717 8,369 6,916 Total at period-end 10,063 8,773 7,329
Schedule of preferred shares and securities by issuer	Outstanding at December 31, 2018 Amount in Preference Shares currency Redemption Issuer/Date of issue Currency (million) Interest rate Option (A) Santander UK plc, October 1995 Pounds Sterling 80.3 10.375% No option Santander UK plc, February 1996 Pounds Sterling 80.3 10.375% No option Santander UK plc, May 2006 Pounds Sterling 13.8 6.22% (B) May 24, 2019 Santander Bank, National Association, August 2000 US Dollar 153.0 12.00% May 16, 2020 Outstanding at December 31, 2018 Amount in Preferred Securities currency Issuer/Date of issue Currency (million) Interest rate Maturity date Banco Santander, S.A. Banco Español de Crédito, October 2004 Euro 36.5 €CMS 10 + 0.125% Perpetuity Banco Español de Crédito, November 2004 (A) Euro 106.5 5.50% Perpetuity Banco Santander, S.A., March 2014 Euro 1,500.0 6.25% (C) Perpetuity Banco Santander, S.A., May 2014 US Dollar 1,500.0 6.375% (D) Perpetuity Banco Santander, S.A., September 2014 Euro 1,500.0 6.25% (E) Perpetuity Banco Santander, S.A., April 2017 Euro 750.0 6.75% (F) Perpetuity Banco Santander, S.A., September 2017 Euro 1,000.0 5.25% (G) Perpetuity Banco Santander, S.A., March 2018 Euro 1,500.0 4.75% (H) Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 US Dollar 18.2 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 US Dollar 25.0 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 Euro 306.9 2.0% Perpetuity Santander Finance Capital, S.A.,(Unipersonal), March 2009 Euro 153.4 2.0% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), September 2004 Euro 144.0 €CMS 10 +0.05% subject to a maximum distribution of 8% per annum Perpetuity Santander Finance Preferred, S.A. (Unipersonal), October 2004 Euro 155.0 5.75% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), March 2007 (J) US Dollar 210.4 US3M + 0.52% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), July 2007 Pounds Sterling 4.9 7.01% Perpetuity Santander International Preferred S.A. (Sociedad Unipersonal), March 2009 US Dollar 979.7 2.0% Perpetuity Santander International Preferred S.A. (Sociedad Unipersonal), March 2009 Euro 8.6 2.0% Perpetuity Santander UK Group Abbey National Plc, August 2002 Pounds Sterling 1.8 Libor GBP (6M) +1.86% (I) Perpetuity Banco Santander (Brasil), S.A. January 2014 US Dollar 129.6 7.38% October 29, 2049 Banco Popular Pastor FRN, June 2004 Euro 11.7 2.07% Perpetuity A. From these dates the issuer can redeem the shares, subject to prior authorization by the national supervisor. B. Fixed/Floating Rate Non-Cumulative Callable Preference Shares. Dividends will accrue on a principal amount equal to £1,000 per Preference Share at a rate of 6.222 per cent per annum in respect of the period from (and including) May 24, 2006 (the Issue Date) to (but excluding) May 24, 2019 (the First Call Date) and thereafter at a rate reset quarterly equal to 1.13 per cent per annum above the London interbank offered rate for three-month sterling deposits. From (and including) the Issue Date to (but excluding) the First Call Date, dividends, if declared, will be paid annually in arrears on May 24, in each year. Subject as provided herein, the first such dividend payment date will be May 24, 2007 and the last such dividend payment date will be the First Call Date. From (and including) the First Call Date, dividends, if declared, will be paid quarterly in arrears on May 24, August 24, November 24 and February 24, in each year. Subject as provided herein, the first such dividend payment date will be August 24, 2019. C. Payment is subject to certain conditions and to the discretion of the Bank. The 6.25% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 541 basis points on the five-year Mid-Swap Rate. D. Payment is subject to certain conditions and to the discretion of the Bank. The 6.375% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 478.8 basis points on the five-year Mid-Swap Rate. E. Payment is subject to certain conditions and to the discretion of the Bank. The 6.25% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 564 basis points on the five-year Mid-Swap Rate. F. Payment is subject to certain conditions and to the discretion of the Bank. The 6.75% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 680.3 basis points on the five-year Mid-Swap Rate. G. Payment is subject to certain conditions and to the discretion of the Bank. The 5.25% interest rate is set for the first six years. After that, it will be reviewed by applying a margin of 499.9 basis points on the five-year Mid-Swap Rate. H. Payment is subject to certain conditions and to the discretion of the Bank. The 4.75% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 409.7 basis points on the five-year Mid-Swap Rate. I. 6.984% fixed until February 9, 2018, and thereafter, at a rate reset semi-annually of 1.86% per annum + Libor GBP (6M). J. Listed in the U.S.

Introduction, Presentation, and

Introduction, Presentation, and Other Information - Classification and reconciliation Policy (Details) € in Millions	Jan. 02, 2018EUR (€)	Dec. 31, 2018EUR (€)subsidiarycompany	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of initial application of standards or interpretations [line items]
Number of subsidiaries | subsidiary		719
Number of other components | company		170
Financial assets measured at fair value through other comprehensive income		€ 118,420
Non-trading financial assets mandatorily at fair value through profit or loss	€ 4,987	10,730
Financial assets held for trading	125,618	92,879	€ 125,458	€ 148,187
Financial assets available-for-sale			133,271	116,774
Cash and cash equivalents	110,995	113,663	110,995	76,454	€ 77,751
Held-to-maturity investments			13,491	14,468
Loans and receivables			903,013	840,004
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	42,075	57,460	34,782	31,609
Financial liabilities at fair value through profit or loss that meet definition of held for trading	107,634	70,343	107,624	108,765
Financial assets at amortised cost	909,094	946,099
Provisions	14,686	13,225	14,489	14,459	14,494
Investments in joint ventures		979	1,987	1,594
Cash flows from (used in) operating activities		3,416	40,188	21,823
Effect of exchange rate changes on cash and cash equivalents		(595)	(5,845)	(3,611)
Increase (decrease) in net change in cash and cash equivalents		2,668	34,541	(1,297)
Provision for contingent liabilities and commitments
Disclosure of initial application of standards or interpretations [line items]
Provisions	814	779	617	459	618
Derivatives
Disclosure of initial application of standards or interpretations [line items]
Financial liabilities at fair value through profit or loss that meet definition of held for trading	57,902	55,341	57,892	74,369
Derivatives
Disclosure of initial application of standards or interpretations [line items]
Financial assets held for trading	57,243	55,939	57,243	72,043
Equity instruments
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	2,584	3,260
Financial assets held for trading	21,353	8,938	21,353	14,497
Financial assets available-for-sale			4,790	5,487	€ 4,849
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently			933	546
Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income		116,819
Non-trading financial assets mandatorily at fair value through profit or loss	1,792	5,587
Financial assets held for trading	36,554	27,800	36,351	48,922
Financial assets available-for-sale		118,420	128,481	111,287
Held-to-maturity investments			13,491	14,468
Loans and receivables			17,543	13,237
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	3,286	3,222	3,485	3,398
Financial assets at amortised cost	35,772	37,696
Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income		1,601
Non-trading financial assets mandatorily at fair value through profit or loss	611	1,883
Financial assets held for trading	10,468	202	10,511	12,725
Loans and receivables			885,470	826,767
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	38,789	54,238	30,364	€ 27,665
Financial assets at amortised cost	873,322	€ 908,403
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Derivatives
Disclosure of initial application of standards or interpretations [line items]
Financial liabilities at fair value through profit or loss that meet definition of held for trading			10
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Equity instruments
Disclosure of initial application of standards or interpretations [line items]
Financial assets available for sale to non-trading assets at FVTPL			2,154
Loans and receivables to non-trading assets at FVTPL			1,537
Loans and receivables to assets at FVTOCI			457
Non-trading financial assets mandatorily at fair value through profit or loss			96
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables to non-trading assets at FVTPL			10,179
Financial assets available for sale to assets at amortized cost			6,589
Financial assets held for trading			203
Financial liabilities at fair value through profit or loss that meet definition of held for trading			199
Financial assets at amortized cost from investments held to maturity			13,491
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables to assets at FVTOCI			1,069
Financial assets held for trading			43
Financial liabilities at fair value through profit or loss that meet definition of held for trading			1,152
Under IAS 39 Before Adjustment For Impairment [Member] | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost			(24,682)
Total impairment impact			(25,299)
Under IAS 39 Before Adjustment For Impairment [Member] | Provision for contingent liabilities and commitments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Provisions			(617)
Under IAS 39 Before Adjustment For Impairment [Member] | Debt instruments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost			(730)
Under IAS 39 Before Adjustment For Impairment [Member] | Loans and advances | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost			€ (23,952)
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Derivatives
Disclosure of initial application of standards or interpretations [line items]
Financial liabilities at fair value through profit or loss that meet definition of held for trading	10
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Equity instruments
Disclosure of initial application of standards or interpretations [line items]
Financial assets available for sale to non-trading assets at FVTPL	1,651
Financial assets measured at fair value through other comprehensive income	533
Loans and receivables to non-trading assets at FVTPL	1,497
Loans and receivables to assets at FVTOCI	486
Non-trading financial assets mandatorily at fair value through profit or loss	96
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables to non-trading assets at FVTPL	611
Non-trading financial assets mandatorily at fair value through profit or loss	199
Financial assets available for sale to assets at amortized cost	6,704
Financial assets held for trading	203
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	9,577
Financial assets at amortized cost from investments held to maturity	13,491
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables to assets at FVTOCI	1,107
Financial assets at amortised cost	1,102
Under IFRS 9 After Adjustment For Impairment [Member] | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income	(2)
Financial assets at amortised cost	(26,656)
Total impairment impact	(27,472)
Under IFRS 9 After Adjustment For Impairment [Member] | Provision for contingent liabilities and commitments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Provisions	(814)
Under IFRS 9 After Adjustment For Impairment [Member] | Debt instruments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income	(2)
Financial assets at amortised cost	(702)
Under IFRS 9 After Adjustment For Impairment [Member] | Loans and advances | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost	(25,954)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member]
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	933
Financial assets available-for-sale	(124,229)
Loans and receivables	(889,779)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	(933)
Financial assets at amortised cost	889,779
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Equity instruments
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	933
Financial assets available-for-sale	(2,636)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	(933)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Financial assets available-for-sale	(121,593)
Loans and receivables	(15,557)
Financial assets at amortised cost	15,557
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables	(874,222)
Financial assets at amortised cost	874,222
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member]
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	4,054
Financial assets held for trading	160
Financial assets available-for-sale	(9,042)
Held-to-maturity investments	(13,491)
Loans and receivables	(13,242)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	8,226
Financial liabilities at fair value through profit or loss that meet definition of held for trading	10
Financial assets at amortised cost	21,297
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Derivatives
Disclosure of initial application of standards or interpretations [line items]
Financial liabilities at fair value through profit or loss that meet definition of held for trading	10
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Equity instruments
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	1,651
Financial assets available-for-sale	(2,154)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	1,792
Financial assets held for trading	203
Financial assets available-for-sale	(6,888)
Loans and receivables	(1,994)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	(199)
Financial assets at amortised cost	20,195
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Non-trading financial assets mandatorily at fair value through profit or loss	611
Financial assets held for trading	(43)
Loans and receivables	(11,248)
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	8,425
Financial assets at amortised cost	1,102
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member]
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables	8
Financial assets at amortised cost	(1,982)
Provisions	197
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income	(2)
Financial assets at amortised cost	(1,974)
Total impairment impact	(2,173)
Investments in joint ventures	(34)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Provision for contingent liabilities and commitments
Disclosure of initial application of standards or interpretations [line items]
Provisions	197
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Provision for contingent liabilities and commitments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Provisions	(197)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Debt instruments
Disclosure of initial application of standards or interpretations [line items]
Loans and receivables	8
Financial assets at amortised cost	20
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Debt instruments | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets measured at fair value through other comprehensive income	(2)
Financial assets at amortised cost	28
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Loans and advances
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost	(2,002)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Loans and advances | Accumulated impairment
Disclosure of initial application of standards or interpretations [line items]
Financial assets at amortised cost	€ (2,002)

Introduction, Presentation, a_2

Introduction, Presentation, and Other Information - B/S reconciliation, etc. (Details) - EUR (€) € in Millions	Jan. 02, 2018	Dec. 31, 2018	Dec. 31, 2017	Nov. 01, 2017	Sep. 08, 2017	Jul. 03, 2017	Dec. 31, 2016	Nov. 04, 2016	Dec. 31, 2015
Assets [abstract]
Cash, cash balances at Central Banks and other deposits on demand	€ 110,995	€ 113,663	€ 110,995				€ 76,454		€ 77,751
Financial assets held for trading	125,618	92,879	125,458				148,187
Non-trading financial assets mandatorily at fair value through profit or loss	4,987	10,730
Financial assets designated at fair value through profit or loss	42,075	57,460	34,782				31,609
Financial assets at fair value through other comprehensive income	126,353	121,091
Financial assets available-for-sale			133,271				116,774
Financial assets at amortised cost	909,094	946,099
Loans and receivables			903,013				840,004
Held-to-maturity investments			13,491				14,468
Investments	6,150		6,184
Other assets (**)	117,797		117,111
TOTAL ASSETS	1,443,069	1,459,271	1,444,305				1,339,125
Liabilities [abstract]
Financial liabilities held for trading	107,634	70,343	107,624				108,765
Financial liabilities designated at fair value through profit or loss	59,616	68,058	59,616				40,263
Financial liabilities at amortised cost	1,126,069	1,171,630	1,126,069				1,044,240
Hedging derivatives, Liabilities	8,034	6,363	8,044				8,156
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	330	303	330				448
Provisions	14,686	13,225	14,489				14,459		14,494
Other liabilities	21,338		21,300
TOTAL LIABILITIES	1,337,707	1,351,910	1,337,472				1,236,426
Shareholders' equity
SHAREHOLDERS' EQUITY	114,955	118,613	116,265				105,977
CAPITAL	8,068	8,118	8,068	€ 48		€ 729	7,291	€ 74	7,217
SHARE PREMIUM	51,053	50,993	51,053			€ 6,343	44,912
EQUITY INSTRUMENTS ISSUED OTHER THAN CAPITAL	525	565	525		€ 686
OTHER EQUITY	216	234	216				240
ACCUMULATED RETAINED EARNINGS	53,437	56,756	53,437				49,953
OTHER RESERVES	(2,912)	(3,567)	(1,602)				(949)
(-) OWN SHARES	(22)	(59)	(22)				(7)
PROFIT ATTRIBUTABLE TO SHAREHOLDERS OF THE PARENT	6,619	7,810	6,619				6,204
(-) INTERIM DIVIDENDS	(2,029)	(2,237)	(2,029)				(1,667)
OTHER ACCUMULATED COMPREHENSIVE INCOME	(21,829)	(22,141)	(21,776)				(15,039)
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	(3,267)	(2,936)	(4,034)				(3,933)
Actuarial gains or losses on defined benefit pension plans	(4,033)	(3,609)	(4,033)				(3,931)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	(1)	1	(1)				(2)
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	773	597
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(6)	75
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	(18,562)	(19,205)	(17,742)				(11,106)
Hedge of net investments in foreign operations (effective portion)	(4,311)	(4,312)	(4,311)				(4,925)
Exchange differences	(15,430)	(15,730)	(15,430)				(8,070)
Hedging derivatives. Cash flow hedges (effective portion)	152	277	152				469
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	1,253	828
Financial assets available-for-sale			2,068				1,571
Share in other income and expenses recognized in investments in joint ventures and associates	(226)	(268)	(221)				(151)
NON-CONTROLLING INTEREST	12,236	10,889	12,344				11,761
Other comprehensive income	(1,433)	(1,292)	(1,436)				(853)
Other items	13,669	12,181	13,780				12,614
TOTAL EQUITY	105,362	107,361	106,833				102,699		98,753
TOTAL LIABILITIES AND EQUITY	€ 1,443,069	1,459,271	1,444,305				1,339,125
New IFRS Phase-in Period	5 years
Additions to right-of-use assets	€ 6,700
Provision for contingent liabilities and commitments
Liabilities [abstract]
Provisions	814	779	617				459		618
Other Provisions For Adoption Of IFRS 9 [Member]
Liabilities [abstract]
Provisions	13,872		13,872
Derivatives
Liabilities [abstract]
Financial liabilities held for trading	57,902	55,341	57,892				74,369
Short positions
Liabilities [abstract]
Financial liabilities held for trading	20,979	15,002	20,979				23,005
Deposits
Liabilities [abstract]
Financial liabilities held for trading	28,753		28,753				11,391
Financial liabilities designated at fair value through profit or loss	55,971	65,304	55,971				37,472
Financial liabilities at amortised cost	883,320	903,101	883,320				791,646
Marketable debt securities
Liabilities [abstract]
Financial liabilities designated at fair value through profit or loss	3,056	2,305	3,056				2,791
Financial liabilities at amortised cost	214,910	244,314	214,910				226,078
Other financial liabilities
Liabilities [abstract]
Financial liabilities designated at fair value through profit or loss	589	449	589
Financial liabilities at amortised cost	27,839	24,215	27,839				26,516
Derivatives
Assets [abstract]
Financial assets held for trading	57,243	55,939	57,243				72,043
Equity instruments
Assets [abstract]
Financial assets held for trading	21,353	8,938	21,353				14,497
Non-trading financial assets mandatorily at fair value through profit or loss	2,584	3,260
Financial assets designated at fair value through profit or loss			933				546
Financial assets at fair value through other comprehensive income	3,169	2,671
Financial assets available-for-sale			4,790				5,487		€ 4,849
Shareholders' equity
Financial assets available-for-sale			914				1,148
Debt instruments
Assets [abstract]
Financial assets held for trading	36,554	27,800	36,351				48,922
Non-trading financial assets mandatorily at fair value through profit or loss	1,792	5,587
Financial assets designated at fair value through profit or loss	3,286	3,222	3,485				3,398
Financial assets at fair value through other comprehensive income	122,077	116,819
Financial assets available-for-sale		118,420	128,481				111,287
Financial assets at amortised cost	35,772	37,696
Loans and receivables			17,543				13,237
Held-to-maturity investments			13,491				14,468
Shareholders' equity
Financial assets available-for-sale		831	1,154				423
Loans and advances
Assets [abstract]
Financial assets held for trading	10,468	202	10,511				12,725
Non-trading financial assets mandatorily at fair value through profit or loss	611	1,883
Financial assets designated at fair value through profit or loss	38,789	54,238	30,364				27,665
Financial assets at fair value through other comprehensive income	1,107	1,601
Financial assets at amortised cost	873,322	€ 908,403
Loans and receivables			885,470				€ 826,767
Loans and receivables reclassified from amortized cost to FVTPL	8,600
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Derivatives
Liabilities [abstract]
Financial liabilities held for trading			10
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Equity instruments
Assets [abstract]
Non-trading financial assets mandatorily at fair value through profit or loss			96
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Debt instruments
Assets [abstract]
Financial assets held for trading			203
Liabilities [abstract]
Financial liabilities held for trading			199
Under IAS 39 Before Adjustment For Classification And Measurement [Member] | Loans and advances
Assets [abstract]
Financial assets held for trading			43
Liabilities [abstract]
Financial liabilities held for trading			€ 1,152
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Derivatives
Liabilities [abstract]
Financial liabilities held for trading	10
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Equity instruments
Assets [abstract]
Non-trading financial assets mandatorily at fair value through profit or loss	96
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Debt instruments
Assets [abstract]
Financial assets held for trading	203
Non-trading financial assets mandatorily at fair value through profit or loss	199
Financial assets designated at fair value through profit or loss	9,577
Under IFRS 9 After Adjustment For Classification And Measurement [Member] | Loans and advances
Assets [abstract]
Financial assets at amortised cost	1,102
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member]
Assets [abstract]
Non-trading financial assets mandatorily at fair value through profit or loss	933
Financial assets designated at fair value through profit or loss	(933)
Financial assets at fair value through other comprehensive income	124,229
Financial assets available-for-sale	(124,229)
Financial assets at amortised cost	889,779
Loans and receivables	(889,779)
Shareholders' equity
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	919
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	5
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	914
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	(919)
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	1,154
Financial assets available-for-sale	(2,068)
Share in other income and expenses recognized in investments in joint ventures and associates	(5)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Equity instruments
Assets [abstract]
Non-trading financial assets mandatorily at fair value through profit or loss	933
Financial assets designated at fair value through profit or loss	(933)
Financial assets at fair value through other comprehensive income	2,636
Financial assets available-for-sale	(2,636)
Shareholders' equity
Financial assets available-for-sale	(914)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Debt instruments
Assets [abstract]
Financial assets at fair value through other comprehensive income	121,593
Financial assets available-for-sale	(121,593)
Financial assets at amortised cost	15,557
Loans and receivables	(15,557)
Shareholders' equity
Financial assets available-for-sale	(1,154)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Naming Modifications [Member] | Loans and advances
Assets [abstract]
Financial assets at amortised cost	874,222
Loans and receivables	(874,222)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member]
Assets [abstract]
Financial assets held for trading	160
Non-trading financial assets mandatorily at fair value through profit or loss	4,054
Financial assets designated at fair value through profit or loss	8,226
Financial assets at fair value through other comprehensive income	2,126
Financial assets available-for-sale	(9,042)
Financial assets at amortised cost	21,297
Loans and receivables	(13,242)
Held-to-maturity investments	(13,491)
Other assets (**)	6
TOTAL ASSETS	94
Liabilities [abstract]
Financial liabilities held for trading	10
Hedging derivatives, Liabilities	(10)
Other liabilities	41
TOTAL LIABILITIES	41
Shareholders' equity
SHAREHOLDERS' EQUITY	91
OTHER RESERVES	91
OTHER ACCUMULATED COMPREHENSIVE INCOME	(53)
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	(152)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	(5)
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	(141)
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(6)
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	99
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	99
NON-CONTROLLING INTEREST	15
Other comprehensive income	3
Other items	12
TOTAL EQUITY	53
TOTAL LIABILITIES AND EQUITY	94
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Derivatives
Liabilities [abstract]
Financial liabilities held for trading	10
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Equity instruments
Assets [abstract]
Non-trading financial assets mandatorily at fair value through profit or loss	1,651
Financial assets at fair value through other comprehensive income	533
Financial assets available-for-sale	(2,154)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Debt instruments
Assets [abstract]
Financial assets held for trading	203
Non-trading financial assets mandatorily at fair value through profit or loss	1,792
Financial assets designated at fair value through profit or loss	(199)
Financial assets at fair value through other comprehensive income	486
Financial assets available-for-sale	(6,888)
Financial assets at amortised cost	20,195
Loans and receivables	(1,994)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Classification And Measurement [Member] | Loans and advances
Assets [abstract]
Financial assets held for trading	(43)
Non-trading financial assets mandatorily at fair value through profit or loss	611
Financial assets designated at fair value through profit or loss	8,425
Financial assets at fair value through other comprehensive income	1,107
Financial assets at amortised cost	1,102
Loans and receivables	(11,248)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member]
Assets [abstract]
Financial assets at fair value through other comprehensive income	(2)
Financial assets at amortised cost	(1,982)
Loans and receivables	8
Investments	(34)
Other assets (**)	680
TOTAL ASSETS	(1,330)
Liabilities [abstract]
Provisions	197
Other liabilities	(3)
TOTAL LIABILITIES	194
Shareholders' equity
SHAREHOLDERS' EQUITY	(1,401)
OTHER RESERVES	(1,401)
NON-CONTROLLING INTEREST	(123)
Other items	(123)
TOTAL EQUITY	(1,524)
TOTAL LIABILITIES AND EQUITY	(1,330)
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Provision for contingent liabilities and commitments
Liabilities [abstract]
Provisions	197
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Debt instruments
Assets [abstract]
Financial assets at fair value through other comprehensive income	(2)
Financial assets at amortised cost	20
Loans and receivables	8
Increase Decrease Due To Initial Adoption Of IFRS 9 Related To Impairment [Member] | Loans and advances
Assets [abstract]
Financial assets at amortised cost	€ (2,002)

Introduction, Presentation, a_3

Introduction, Presentation, and Other Information - 2017 and 2016 (Details)	12 Months Ended
	Dec. 31, 2018
MXN
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	5.20%
Change in average foreign currency exchange rate (as a percent)	(6.16%)
USD
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	4.74%
Change in average foreign currency exchange rate (as a percent)	(4.46%)
BRL
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(10.60%)
Change in average foreign currency exchange rate (as a percent)	(16.30%)
Argentine peso
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(47.50%)
Change in average foreign currency exchange rate (as a percent)	(40.43%)
GBP
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(0.82%)
Change in average foreign currency exchange rate (as a percent)	(0.96%)
Chilean peso
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(7.26%)
Change in average foreign currency exchange rate (as a percent)	(3.32%)
Polish zloty
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(2.89%)
Change in average foreign currency exchange rate (as a percent)	(0.10%)

Introduction, Presentation and

Introduction, Presentation and Other Information - Capital Mgmt, Other information (Details)	Feb. 06, 2019USD ($)	Feb. 06, 2019EUR (€)	Dec. 31, 2018USD ($)item	Dec. 31, 2018EUR (€)item	Dec. 31, 2017EUR (€)
Disclosure of initial application of standards or interpretations [line items]
Percentage of assets weighted by risk			13.50%	13.50%
Planned coverage percentage of loan portfolio under advanced internal ratings based approach			90.00%	90.00%
Number of key markets | item			10	10
Issue of convertible instruments	$ 1,200,000,000	€ 1,052,000,000
Borrowings, interest rate	7.50%	7.50%
Initial interest rate period	5 years	5 years
Borrowings, adjustment to interest rate basis	4.989%	4.989%
Borrowings, interest rate basis	5-year Mid Swap Rate	5-year Mid Swap Rate
Line of credit extended by IMF to Argentina | $			$ 57,000,000,000
Closing foreign exchange rate			43.12	43.12
Reclassification adjustments on exchange differences on translation, net of tax				€ 398,000,000	€ (1,716,000,000)
Revaluation gains/(losses)				€ 104,000,000	€ (131,000,000)
ARGENTINA
Disclosure of initial application of standards or interpretations [line items]
Annual inflation rate, as a percent			47.64%	47.64%
3-year inflation rate, as a percent			147.00%	147.00%

Accounting policies - Translati

Accounting policies - Translation of foreign currency balances (Details) € in Millions	12 Months Ended
	Dec. 31, 2018item	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Foreign currency transactions
Number of consecutive stages | item	2
Adjustment to correct for effect of inflation | €		€ 0	€ 0

Accounting policies - Exposure

Accounting policies - Exposure to foreign currency risk (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sensitivity of consolidated profit and consolidated equity
Appreciation variation (as a percent)	1.00%	1.00%	1.00%
Depreciation variation (as a percent)	1.00%	1.00%	1.00%
USD
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	€ (162.3)	€ (157.9)	€ (187.1)
1 % appreciation of euro, Effect on consolidated profit	(4.1)	(1.4)	(4.5)
1 % depreciation of euro, Effect on consolidated equity	165.6	161.1	190.8
1 % depreciation of euro, Effect on consolidated profit	4.2	1.5	4.5
Chilean peso
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(22.9)	(29)	(27.9)
1 % appreciation of euro, Effect on consolidated profit	(5.1)	(1.8)	(4.2)
1 % depreciation of euro, Effect on consolidated equity	23.4	29.6	28.4
1 % depreciation of euro, Effect on consolidated profit	5.2	1.8	4.3
GBP
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(171.2)	(176.6)	(184.9)
1 % appreciation of euro, Effect on consolidated profit	(4.5)	(3.1)	(10)
1 % depreciation of euro, Effect on consolidated equity	174.7	180.2	188.7
1 % depreciation of euro, Effect on consolidated profit	4.6	3.2	10.2
MXN
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(18.3)	(16)	(16.2)
1 % appreciation of euro, Effect on consolidated profit	(1.7)	(1.2)	(5.4)
1 % depreciation of euro, Effect on consolidated equity	18.6	16.3	16.5
1 % depreciation of euro, Effect on consolidated profit	1.8	1.2	5.5
BRL
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(85.6)	(93.1)	(122.3)
1 % appreciation of euro, Effect on consolidated profit	(5.6)	(6.5)	(6.3)
1 % depreciation of euro, Effect on consolidated equity	87.4	95	124.7
1 % depreciation of euro, Effect on consolidated profit	5.7	6.6	6.5
Polish zloty
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(36.2)	(34.5)	(31.5)
1 % appreciation of euro, Effect on consolidated profit	(4.2)	(1.5)	(3.3)
1 % depreciation of euro, Effect on consolidated equity	36.9	35.2	32.1
1 % depreciation of euro, Effect on consolidated profit	4.2	1.5	3.3
Argentine peso
Sensitivity of consolidated profit and consolidated equity
1 % appreciation of euro, Effect on consolidated equity	(7.8)	(7.4)	(9)
1 % appreciation of euro, Effect on consolidated profit	(0.6)	(3.5)	(3.3)
1 % depreciation of euro, Effect on consolidated equity	8	7.6	9.2
1 % depreciation of euro, Effect on consolidated profit	€ 0.6	€ 3.6	€ 3.3

Accounting policies - Basis of

Accounting policies - Basis of consolidation (Details) - Luri 1, S.A.	12 Months Ended
	Dec. 31, 2018
Subsidiaries and joint ventures
Ownership interest (as a percent)	36.00%
Maximum
Subsidiaries and joint ventures
Voting rights (as a percent)	50.00%

Accounting policies - Valuation

Accounting policies - Valuation techniques (Details) € in Millions	Dec. 31, 2018EUR (€)division	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Disclosure of detailed information about financial instruments [line items]
Number of independent divisions | division	2
Financial assets available for sale, category | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value		€ 1,211	€ 1,349
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	€ 70,343	107,624	108,765
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	16,104	21,828	20,906
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	54,239	85,796	87,859
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	68,058	59,616	40,263
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	987	769
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	67,071	58,847	40,263
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	6,363	8,044	8,156
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	5	8	9
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	6,358	8,036	8,147
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	92,879	125,458	148,187
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	37,108	58,215	64,259
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	55,771	67,243	83,928
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	10,730
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,835
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8,895
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	57,460	34,782	31,609
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	3,102	3,823	3,220
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	54,358	30,959	28,389
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	121,091
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	103,590
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	17,501
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Financial Assets Excluding Equity Instruments [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value		132,060	115,425
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Level 1 | Financial Assets Excluding Equity Instruments [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value		113,258	89,563
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Level 2 and 3 | Financial Assets Excluding Equity Instruments [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value		18,802	25,862
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8,607	8,537	10,377
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 1
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value			216
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8,607	8,537	10,161
Liabilities Under Insurance Contracts [Member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	765	1,117	652
Liabilities Under Insurance Contracts [Member] | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	€ 765	€ 1,117	€ 652

Accounting policies - Valuati_2

Accounting policies - Valuation adjustment for counterparty and default risk (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items]
Amount of CVA	€ 351
Change in CVA (as a percent)		8.80%
Amount of DVA	€ 261
Change in DVA (as a percent)		18.90%
Credit spread change (as a percent)	30.00%
Loans and receivables, category
Disclosure of detailed information about financial instruments [line items]
Increase in exposure	€ 2,183
Bonds, Long-term Repurchase Agreements, And Derivatives [Member]
Disclosure of detailed information about financial instruments [line items]
Level reclassifications into Level 3	€ 1,300

Accounting policies - Valuati_3

Accounting policies - Valuation adjustments due to model risk (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	€ 140,659		€ 124,178	€ 146,991
Financial liabilities, at fair value	127,991		153,600	136,835
Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	4,473	€ 3,546	1,363	1,349	€ 2,481
Financial liabilities, at fair value	442	196	196	86	324
Financial liabilities held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	289	182	182	69	302
Financial liabilities held for trading | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	289	182	182	69	302
Financial liabilities held for trading | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	111	100	100	1	1
Financial liabilities held for trading | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	7	9	9
Financial liabilities held for trading | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	26	19	19	21	194
Financial liabilities held for trading | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	143	41	41	46	107
Financial liabilities held for trading | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	2	13	13	1
Financial liabilities held for trading | Credit risk derivatives
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value				1
Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6	7	7	9	11
Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6	7	7	9	11
Financial liabilities designated at fair value through profit or loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	147	7	7	8	11
Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	21	18	18	27	18
Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	21	18	18	27	18
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,403	1,365
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	460	465
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	481	518
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	462	382
Financial assets held for trading, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	738	437	437	341	950
Financial assets held for trading, category | Debt and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	153	32	32	40	43
Financial assets held for trading, category | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	585	405	405	301	907
Financial assets held for trading, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	185	189	189	55	54
Financial assets held for trading, category | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2	5	5	2
Financial assets held for trading, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	149	162	162	173	619
Financial assets held for trading, category | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	198	5	5	26	120
Financial assets held for trading, category | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	51	44	44	45	114
Financial assets held for trading, category | Credit risk derivatives
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0		0
Financial assets designated at fair value through profit or loss, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	876		282	325	514
Financial assets designated at fair value through profit or loss, category | Loans and advances - Credit institutions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	201
Financial assets designated at fair value through profit or loss, category | Loans and advances - Customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	560		72	74	81
Financial assets designated at fair value through profit or loss, category | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	115		199	237	283
Financial assets designated at fair value through profit or loss, category | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			11	14	150
Financial assets at fair value through other comprehensive income, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,435	€ 1,726
Financial assets available for sale, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			626	656	€ 999
Financial assets available for sale, category | Equity instruments
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			1,211	1,349
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	70,343		107,624	108,765
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	53,950		85,614	87,790
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	289		182	69
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Deposits - Central banks | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value			282	1,351
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Deposits - Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value			292	44
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Deposits - Customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value			28,179	9,996
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Derivatives | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	53,950		56,860	73,481
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	289		182	69
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	43,489		45,041	57,103
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	111		100	1
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Exchange rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	610		497	413
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	7		9
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	4,411		5,402	6,485
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	26		19	21
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Index and securities options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	1,233		1,527	1,672
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	143		41	46
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Interest rate and equity futures | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	7		1	1,443
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Short positions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value			1	2,918
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	4,200		4,392	6,365
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	2		13	1
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6,363		8,044	8,156
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6,352		8,029	8,138
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6		7	9
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	5,868		7,573	6,676
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	6		7	9
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	158		287	10
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	326		169	1,452
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	68,058		59,616	40,263
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	66,924		58,840	40,255
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	147		7	8
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8,607		8,537	10,377
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8,586		8,519	10,134
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	21		18	27
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	7,704		7,896	9,737
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	21		18	27
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	20		13	13
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	862		610	384
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member]
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	10,730
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	7,492
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,403
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,422
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	460
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	5,085
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	481
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	985
Financial Assets And Liabilities Category [Member] | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	462
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	92,879		125,458	148,187
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	55,033		66,806	83,587
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	738		437	341
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Loans and advances - Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			1,696	3,220
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Loans and advances - Customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	205		8,815	9,504
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Debt and equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	314		335	798
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Debt and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	153		32	40
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Derivatives | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	54,514		55,960	70,065
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	585		405	301
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	44,423		44,766	53,499
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	185		189	55
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Exchange rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	617		463	524
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2		5	2
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	3,778		4,747	5,349
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	149		162	173
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Interest rate futures | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			2	1,447
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Index and securities options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,118		1,257	1,725
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	198		5	26
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	4,578		4,725	7,521
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	51		44	45
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	57,460		34,782	31,609
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	53,482		30,677	28,064
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	876		282	325
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Loans and advances - Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	22,897		9,889	10,069
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Loans and advances - Credit institutions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	201
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Loans and advances - Customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	21,355		20,403	17,521
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Loans and advances - Customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	560		72	74
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Loans and advances - Central banks | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	9,226
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Debt and equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	4		385	474
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Debt and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	115		210	251
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	121,091
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	16,066
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,435
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Loans and advances | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	912
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Loans and advances | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	689
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Debt instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	14,699
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	165
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	455
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	581
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			18,176	25,206
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			626	656
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Debt and equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			18,176	25,206
Financial Assets And Liabilities Category [Member] | Financial assets available for sale, category | Debt and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value			626	656
Liabilities Under Insurance Contracts [Member]
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	765		1,117	652
Liabilities Under Insurance Contracts [Member] | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	€ 765		€ 1,117	€ 652

Accounting policies - Level 3 F

Accounting policies - Level 3 Financial Instruments (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]
Projected shift in HPI spot rate, Assets (as a percent)	10.00%
Projected shift in HPI spot rate, Liabilities (as a percent)	10.00%
Level 3
Disclosure of detailed information about financial instruments [line items]
Net (loss) gain recognized in profit or loss arising from models whose significant inputs are unobservable market data	€ 10	€ (116)	€ 60
Present Value Method And Other Interest Rate Curves Foreign Exchange Market Prices And Credit Curves [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	1.8
Present Value Method And Other Interest Rate Curves Foreign Exchange Market Prices And Credit Curves [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	(1.8)
Financial liabilities held for trading | Derivatives | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of liabilities due to change in inputs	(1.2)
Financial liabilities held for trading | Derivatives | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of liabilities due to change in inputs	€ 1.2
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Minimum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Liabilities (as a percent)	0.00%
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Maximum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Liabilities (as a percent)	5.00%
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Liabilities (as a percent)	2.60%
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of liabilities due to change in inputs	€ (5.4)
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of liabilities due to change in inputs	€ 5.8
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI spot rate, Liabilities	722
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of liabilities due to change in inputs	€ (4.9)
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of liabilities due to change in inputs	€ 4.8
Financial liabilities held for trading | Derivatives | Present Value Method, Modified Black Scholes Model Approach, Curves On Tab Indices [Member]
Disclosure of detailed information about financial instruments [line items]
Change of plus or (minus) basis points, Liabilities (as a percent)	1.00%
Hedging derivatives, category | Derivatives | Advanced local and stochastic volatility model, correlation between share prices | Minimum
Disclosure of detailed information about financial instruments [line items]
Correlation between share prices (as a percent)	55.00%
Hedging derivatives, category | Derivatives | Advanced local and stochastic volatility model, correlation between share prices | Maximum
Disclosure of detailed information about financial instruments [line items]
Correlation between share prices (as a percent)	75.00%
Hedging derivatives, category | Derivatives | Advanced local and stochastic volatility model, correlation between share prices | Weighted average
Disclosure of detailed information about financial instruments [line items]
Correlation between share prices (as a percent)	65.00%
Hedging derivatives, category | Derivatives | Advanced multi-factor interest rate models | Minimum
Disclosure of detailed information about financial instruments [line items]
Mean reversion of interest rates, Liabilities (as a percent)	0.0001%
Hedging derivatives, category | Derivatives | Advanced multi-factor interest rate models | Maximum
Disclosure of detailed information about financial instruments [line items]
Mean reversion of interest rates, Liabilities (as a percent)	0.03%
Hedging derivatives, category | Derivatives | Advanced multi-factor interest rate models | Weighted average
Disclosure of detailed information about financial instruments [line items]
Mean reversion of interest rates, Liabilities (as a percent)	0.01%
Financial liabilities designated at fair value through profit or loss | Minimum
Disclosure of detailed information about financial instruments [line items]
Potential downward movement from current parameter of mean reversion of interest rates, Liabilities (as a percent)	0.0001%
Financial liabilities designated at fair value through profit or loss | Maximum
Disclosure of detailed information about financial instruments [line items]
Potential downward movement from current parameter of mean reversion of interest rates, Liabilities (as a percent)	0.03%
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other Valuation, Litigation Contingencies [Member] | Minimum
Disclosure of detailed information about financial instruments [line items]
Litigation contingencies, Assets (as a percent)	0.00%
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other Valuation, Litigation Contingencies [Member] | Maximum
Disclosure of detailed information about financial instruments [line items]
Litigation contingencies, Assets (as a percent)	100.00%
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other Valuation, Litigation Contingencies [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
Litigation contingencies, Assets (as a percent)	29.00%
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other Valuation, Litigation Contingencies [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (23.8)
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other Valuation, Litigation Contingencies [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	9.7
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other, Default And Prepayment Rates, Etc. [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	(6.6)
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Present Value Method And Other, Default And Prepayment Rates, Etc. [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 6.6
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Local Volatility Valuation Technique [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
Long-term volatility, Assets (as a percent)	34.00%
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Local Volatility Valuation Technique [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 244.9
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Local Volatility Valuation Technique [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (313.8)
Financial assets held for trading, category | Derivatives | Present Value Method
Disclosure of detailed information about financial instruments [line items]
Change of plus or (minus) basis points, Assets (as a percent)	1.00%
Financial assets held for trading, category | Derivatives | Present Value, Curves On TAB Indices Approach [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (0.3)
Financial assets held for trading, category | Derivatives | Present Value, Curves On TAB Indices Approach [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 0.3
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Minimum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	0.00%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Maximum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	5.00%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	2.70%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (24)
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI forward growth rate | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 20.7
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI spot rate, Assets	783
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (7.8)
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, HPI spot rate | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 7.8
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, FX Volatility In Long Term [Member] | Minimum
Disclosure of detailed information about financial instruments [line items]
FX Volatility in long-term, Assets (as a percent)	11.00%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, FX Volatility In Long Term [Member] | Maximum
Disclosure of detailed information about financial instruments [line items]
FX Volatility in long-term, Assets (as a percent)	17.00%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, FX Volatility In Long Term [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
FX Volatility in long-term, Assets (as a percent)	14.75%
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, FX Volatility In Long Term [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (34.4)
Financial assets held for trading, category | Derivatives | Present Value Method, Modified Black-Scholes Model, FX Volatility In Long Term [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	5
Financial assets held for trading, category | Derivatives | Interest Rate Curve Foreign Exchange Market Prices [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	(163.2)
Financial assets held for trading, category | Derivatives | Interest Rate Curve Foreign Exchange Market Prices [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (84.4)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Probability-weighted set (per forecast mortality rates) of European HPI Options using Black-Scholes model | Minimum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	0.00%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Probability-weighted set (per forecast mortality rates) of European HPI Options using Black-Scholes model | Maximum
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	5.00%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Probability-weighted set (per forecast mortality rates) of European HPI Options using Black-Scholes model | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	2.80%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Probability-weighted set (per forecast mortality rates) of European HPI Options using Black-Scholes model | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (6.2)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Probability-weighted set (per forecast mortality rates) of European HPI Options using Black-Scholes model | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 5
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Probability-weighted set (per forecast mortality rates) of HPI forwards, using the present value model, HIP forward growth rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI spot rate, Assets	783
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Probability-weighted set (per forecast mortality rates) of HPI forwards, using the present value model, HIP forward growth rate | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (11.2)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Probability-weighted set (per forecast mortality rates) of HPI forwards, using the present value model, HIP forward growth rate | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 11.2
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | TD Black Valuation Method [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
FX Volatility in long-term, Assets (as a percent)	4.70%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | TD Black Valuation Method [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 2.2
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | TD Black Valuation Method [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (11.5)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Model Asset Swap And CDS [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
Model interest rate curves and credit, as a percent	7.70%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Model Asset Swap And CDS [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (19.8)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Model Asset Swap And CDS [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 4.4
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Cvx Adjustment SLN Valuation Technique [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
Long-term volatility, Assets (as a percent)	8.00%
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Cvx Adjustment SLN Valuation Technique [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value of assets due to change in inputs	€ (121.2)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt and equity instruments | Cvx Adjustment SLN Valuation Technique [Member] | Favourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs	€ 105.1

Accounting policies - Changes i

Accounting policies - Changes in the financial instruments classified as Level 3 (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Level 2
Changes in financial instruments, Assets
Assets at beginning/end of period	€ 140,659	€ 124,178	€ 146,991
Changes in financial instruments, Liabilities
Liabilities at beginning of period	153,600	136,835
Liabilities at end of period	127,991	153,600	136,835
Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	4,473	1,363	1,349	€ 3,546	€ 2,481
Purchases	418	46	37
Sales	(294)	(271)	(431)
Settlements	(39)	(5)	(132)
Changes in fair value recognized in profit or loss	18	(156)	71
Changes in fair value recognized in equity	(269)	59	(11)
Level reclassifications into Level 3	1,189	194
Level reclassifications (out of) Level 3			(520)
Other	(96)	147	(146)
Changes in financial instruments, Liabilities
Liabilities at beginning of period	196	86	324
Perimeter	181	33
Sales	(95)	(3)	(37)
Changes in fair value recognized in profit or loss	8	(40)	11
Level reclassifications into Level 3	161	126
Level reclassifications (out of) Level 3			(199)
Other	(9)	(6)	(13)
Liabilities at end of period	442	196	86
Financial liabilities held for trading | Level 3
Changes in financial instruments, Assets
Level reclassifications into Level 3		126
Level reclassifications (out of) Level 3			(199)
Changes in financial instruments, Liabilities
Liabilities at beginning of period	182	69	302
Perimeter	41	33
Sales	(95)	(3)	(34)
Changes in fair value recognized in profit or loss	9	(38)	10
Level reclassifications into Level 3	161
Other	(9)	(5)	(10)
Liabilities at end of period	289	182	69
Financial liabilities held for trading | Derivatives | Level 3
Changes in financial instruments, Assets
Level reclassifications into Level 3		126
Level reclassifications (out of) Level 3			(199)
Changes in financial instruments, Liabilities
Liabilities at beginning of period	182	69	302
Perimeter	41	33
Sales	(95)	(3)	(34)
Changes in fair value recognized in profit or loss	9	(38)	10
Level reclassifications into Level 3	161
Other	(9)	(5)	(10)
Liabilities at end of period	289	182	69
Financial liabilities held for trading | Swaps | Level 3
Changes in financial instruments, Assets
Level reclassifications into Level 3		126
Changes in financial instruments, Liabilities
Liabilities at beginning of period	100	1	1
Sales	(7)
Changes in fair value recognized in profit or loss	(7)	(26)
Level reclassifications into Level 3	28
Other	(3)	(1)
Liabilities at end of period	111	100	1
Financial liabilities held for trading | Exchange rate options | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	9
Perimeter		21
Changes in fair value recognized in profit or loss	(2)	(11)
Other		(1)
Liabilities at end of period	7	9
Financial liabilities held for trading | Interest rate options | Level 3
Changes in financial instruments, Assets
Level reclassifications (out of) Level 3			(155)
Changes in financial instruments, Liabilities
Liabilities at beginning of period	19	21	194
Sales	(1)		(19)
Changes in fair value recognized in profit or loss	(1)	(2)	1
Level reclassifications into Level 3	10
Other	(1)
Liabilities at end of period	26	19	21
Financial liabilities held for trading | Index and securities options | Level 3
Changes in financial instruments, Assets
Level reclassifications (out of) Level 3			(44)
Changes in financial instruments, Liabilities
Liabilities at beginning of period	41	46	107
Perimeter	41
Sales	(87)	(3)	(15)
Changes in fair value recognized in profit or loss	25		8
Level reclassifications into Level 3	128
Other	(5)	(2)	(10)
Liabilities at end of period	143	41	46
Financial liabilities held for trading | Other | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	13	1
Perimeter		12
Changes in fair value recognized in profit or loss	(6)	1	1
Level reclassifications (out of) Level 3	(5)
Other		(1)
Liabilities at end of period	2	13	1
Hedging derivatives, category | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	7	9	11
Sales			(3)
Changes in fair value recognized in profit or loss	(1)	(2)	1
Liabilities at end of period	6	7	9
Hedging derivatives, category | Swaps | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	7	9	11
Sales			(3)
Changes in fair value recognized in profit or loss	(1)	(2)	1
Liabilities at end of period	6	7	9
Financial liabilities designated at fair value through profit or loss | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	7	8	11
Perimeter	140
Other		(1)	(3)
Liabilities at end of period	147	7	8
Hedging derivatives, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	21	18	27	18	18
Sales		(2)	(4)
Changes in fair value recognized in profit or loss	3	(7)	13
Hedging derivatives, category | Swaps | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	21	18	27	18	18
Sales		(2)	(4)
Changes in fair value recognized in profit or loss	3	(7)	13
Financial assets held for trading, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	738	437	341	437	950
Purchases	85	45
Sales	(26)	(21)	(157)
Settlements	(34)
Changes in fair value recognized in profit or loss	(16)	(129)	52
Level reclassifications into Level 3	312	200
Level reclassifications (out of) Level 3			(489)
Other	(20)	1	(15)
Financial assets held for trading, category | Debt and equity instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	153	32	40	32	43
Purchases	22
Sales	(6)	(7)	(5)
Settlements	(34)
Changes in fair value recognized in profit or loss	2	(1)	3
Level reclassifications into Level 3	141
Other	(4)		(1)
Financial assets held for trading, category | Derivatives | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	585	405	301	405	907
Purchases	63	45
Sales	(20)	(14)	(152)
Changes in fair value recognized in profit or loss	(18)	(128)	49
Level reclassifications into Level 3	171	200
Level reclassifications (out of) Level 3			(489)
Other	(16)	1	(14)
Financial assets held for trading, category | Swaps | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	185	189	55	189	54
Purchases		1
Sales	(8)	(6)
Changes in fair value recognized in profit or loss	4	(59)	(3)
Level reclassifications into Level 3	4	200
Other	(4)	(2)	4
Financial assets held for trading, category | Exchange rate options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	2	5	2	5
Purchases		5
Changes in fair value recognized in profit or loss	(2)	(2)	2
Other	(1)
Financial assets held for trading, category | Interest rate options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	149	162	173	162	619
Sales	(3)		(52)
Changes in fair value recognized in profit or loss	(16)	(11)	39
Level reclassifications into Level 3	8
Level reclassifications (out of) Level 3			(433)
Other	(2)
Financial assets held for trading, category | Index and securities options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	198	5	26	5	120
Purchases	41
Sales	(1)	(1)	(30)
Changes in fair value recognized in profit or loss	(35)	(18)	(3)
Level reclassifications into Level 3	195
Level reclassifications (out of) Level 3			(56)
Other	(7)	(2)	(5)
Financial assets held for trading, category | Other | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	51	44	45	44	114
Purchases	22	39
Sales	(8)	(7)	(70)
Changes in fair value recognized in profit or loss	31	(38)	14
Level reclassifications (out of) Level 3	(36)
Other	(2)	5	(13)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	1,403			1,365
Purchases	66
Sales	(30)
Settlements	(5)
Changes in fair value recognized in profit or loss	12
Level reclassifications into Level 3	31
Other	(36)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Loans and advances - Customers | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	460			465
Purchases	56
Sales	(22)
Changes in fair value recognized in profit or loss	20
Other	(59)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	481			518
Sales	(7)
Changes in fair value recognized in profit or loss	(29)
Level reclassifications into Level 3	1
Other	(2)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Equity instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	462			382
Purchases	10
Sales	(1)
Settlements	(5)
Changes in fair value recognized in profit or loss	21
Level reclassifications into Level 3	30
Other	25
Financial assets at fair value through other comprehensive income, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	1,435			€ 1,726
Purchases	162
Sales	(238)
Changes in fair value recognized in equity	(269)
Level reclassifications into Level 3	147
Other	(93)
Financial assets designated at fair value through profit or loss, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	876	282	325		514
Purchases	105
Sales		(9)	(7)
Settlements			(104)
Changes in fair value recognized in profit or loss	19	(20)	6
Level reclassifications into Level 3	699
Level reclassifications (out of) Level 3			(2)
Other	53	(14)	(82)
Financial assets designated at fair value through profit or loss, category | Loans and advances - Credit institutions | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	201
Changes in fair value recognized in profit or loss	(1)
Level reclassifications into Level 3	202
Financial assets designated at fair value through profit or loss, category | Loans and advances - Customers | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	560	72	74		81
Sales		(2)
Changes in fair value recognized in profit or loss	6	3	5
Level reclassifications into Level 3	497
Other	57	(3)	(12)
Financial assets designated at fair value through profit or loss, category | Debt instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	115	199	237		283
Purchases	105
Sales		(7)	(7)
Changes in fair value recognized in profit or loss	14	(21)	1
Other	€ (4)	(10)	(40)
Financial assets designated at fair value through profit or loss, category | Equity instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period		11	14		150
Settlements			(104)
Changes in fair value recognized in profit or loss		(2)
Level reclassifications (out of) Level 3			(2)
Other		(1)	(30)
Financial assets available for sale, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period		626	656		€ 999
Purchases		1	37
Sales		(239)	(263)
Settlements		(5)	(28)
Changes in fair value recognized in equity		59	(11)
Level reclassifications (out of) Level 3		(6)	(29)
Other		160	(49)
Financial assets available for sale, category | Equity instruments
Changes in financial instruments, Assets
Assets at beginning/end of period		€ 1,211	€ 1,349

Accounting policies - Offsettin

Accounting policies - Offsetting of financial instruments (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial assets offset in the consolidated balance sheets
Gross amount of financial assets	€ 186,169	€ 160,441	€ 180,838
Gross amount of financial liabilities offset in the balance sheet	(46,540)	(45,105)	(47,472)
Net amount of financial assets presented in the balance sheet	139,629	115,336	133,366
Financial liabilities offset in the consolidated balance sheets
Gross amount of financial liabilities	186,414	214,849	210,327
Gross amount of financial assets offset in the balance sheet	(46,540)	(45,105)	(47,472)
Net amount of financial liabilities presented in the balance sheet	139,874	169,744	162,855
Gross amount of other items offset in the balance sheet	1,445	1,645	1,742
Assets subject to netting and collateral arrangements on balance sheet	128,637	97,017	110,445
Liabilities subject to netting and collateral arrangements on balance sheet	130,969	153,566	137,097
Derivatives
Financial assets offset in the consolidated balance sheets
Gross amount of financial assets	107,055	103,740	127,679
Gross amount of financial liabilities offset in the balance sheet	(42,509)	(37,960)	(45,259)
Net amount of financial assets presented in the balance sheet	64,546	65,780	82,420
Reverse repurchase agreements
Financial assets offset in the consolidated balance sheets
Gross amount of financial assets	79,114	56,701	53,159
Gross amount of financial liabilities offset in the balance sheet	(4,031)	(7,145)	(2,213)
Net amount of financial assets presented in the balance sheet	75,083	49,556	50,946
Derivatives
Financial liabilities offset in the consolidated balance sheets
Gross amount of financial liabilities	104,213	103,896	127,784
Gross amount of financial assets offset in the balance sheet	(42,509)	(37,960)	(45,259)
Net amount of financial liabilities presented in the balance sheet	61,704	65,936	82,525
Repurchase agreements
Financial liabilities offset in the consolidated balance sheets
Gross amount of financial liabilities	82,201	110,953	82,543
Gross amount of financial assets offset in the balance sheet	(4,031)	(7,145)	(2,213)
Net amount of financial liabilities presented in the balance sheet	€ 78,170	€ 103,808	€ 80,330

Accounting policies - Impairmen

Accounting policies - Impairment of financial assets (Details)	12 Months Ended
	Dec. 31, 2018
Impairment of financial assets
Minimum period from which recovery considered remote	4 years
Minimum period before seniority	2 years

Accounting policies - Assets he

Accounting policies - Assets held for sale (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Non-current assets held for sale
Maximum percentage of appraisal company's total billings to Group	15.00%
Fair value less costs to sell of non-current assets held for sale exceeding carrying amount	€ 471
SPAIN
Non-current assets held for sale
Percentage of entity's total non-current assets held for sale	86.50%

Accounting policies - Tangible

Accounting policies - Tangible assets - Property, plant and equipment for own use (Details)	12 Months Ended
	Dec. 31, 2018
Buildings
Disclosure of detailed information about property, plant and equipment [line items]
Average annual rate (as a percent)	2.00%
Furniture
Disclosure of detailed information about property, plant and equipment [line items]
Average annual rate (as a percent)	7.70%
Fixtures
Disclosure of detailed information about property, plant and equipment [line items]
Average annual rate (as a percent)	7.00%
Office and IT equipment
Disclosure of detailed information about property, plant and equipment [line items]
Average annual rate (as a percent)	25.00%
Leasehold improvements
Disclosure of detailed information about property, plant and equipment [line items]
Average annual rate (as a percent)	7.00%

Accounting Policies - Leases (D

Accounting Policies - Leases (Details) € in Millions	Dec. 31, 2018EUR (€)
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments payable under non-cancellable operating lease	€ 8,699
Within one year
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments payable under non-cancellable operating lease	739
Between one and five years
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments payable under non-cancellable operating lease	2,472
More than five years
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments payable under non-cancellable operating lease	€ 5,488

Santander Group - Sale of WiZin

Santander Group - Sale of WiZink (Details) - EUR (€)	Nov. 06, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017	Jun. 07, 2017
Disclosure of detailed information about business combination [line items]
Proceeds from sale of equity method investment		€ 2,327,000,000	€ 883,000,000	€ 459,000,000
Wizink Bank, S.A.
Disclosure of detailed information about business combination [line items]
Ownership interest disposed, as a percent	49.00%
Proceeds from sale of equity method investment	€ 1,043,000,000
Banco Popular Espanol, S.A.
Disclosure of detailed information about business combination [line items]
Consideration paid				681,000,000	€ 1
Net identifiable assets acquired (liabilities assumed)				306,000,000		€ (248,000,000)
Loans and advances to customers				315,000,000		82,057,000,000
Goodwill recognised as of acquisition date				€ 375,000,000		€ 248,000,000

Santander Group - Acquisition o

Santander Group - Acquisition of Deutsche Bank Polska (Details) - EUR (€) € in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2016
Disclosure of detailed information about business combination [line items]
Negative goodwill recognized in results		€ 67	€ 22
Retail and Private Banking Business of Deutsche Bank Polska SA
Disclosure of detailed information about business combination [line items]
Purchase price at acquisition date	€ 298
Identifiable assets acquired (liabilities assumed)	365
Loans and advances to customers	4,304
Loans and advances to credit institutions	4,025
Revaluation adjustment	82
Negative goodwill recognized in results	€ 67

Santander Group - Banco Popular

Santander Group - Banco Popular Acquisition (Details) - EUR (€)	Jun. 07, 2017	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Sep. 08, 2017	Jul. 06, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair values of the identifiable assets acquired and liabilities assumed at date of combination
Fidelity Bonds, market value		€ 565,000,000	€ 525,000,000	€ 525,000,000	€ 686,000,000
Banco Popular Espanol, S.A.
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	100.00%
Consideration paid							€ 1	€ 681,000,000
Fair values of the identifiable assets acquired and liabilities assumed at date of combination
Cash and balances with central banks	€ 1,861,000,000
Financial assets available-for-sale	18,974,000,000
Deposits from credit institutions	2,971,000,000
Loans and receivables - Loans and advances to customers	82,057,000,000							315,000,000
Investments	1,815,000,000
Intangible assets	133,000,000
Tax assets	3,945,000,000
Non-current assets held for sale	6,531,000,000
Other assets	6,259,000,000
Total assets	124,546,000,000
Deposits from central banks	28,845,000,000
Deposits from credit institutions	14,094,000,000
Customer deposits	62,270,000,000
Marketable debt securities and other financial liabilities	12,919,000,000
Provisions	1,816,000,000
Other liabilities	4,850,000,000
Total liabilities	124,794,000,000
Net asset value	(248,000,000)							306,000,000
Goodwill recognised as of acquisition date	248,000,000							€ 375,000,000
Provisional fair value adjustments for loans and receivables	(3,239,000,000)
Provisional fair value adjustments for foreclosed assets	(3,806,000,000)
Provisional fair value adjustments for intangible assets	(2,469,000,000)
Provisional fair value adjustments for deferred tax assets	(1,711,000,000)
Expected cost	€ 680,000,000
Fidelity Bonds, market value						€ 535,000,000

Santander Group - Sale of Banco

Santander Group - Sale of Banco Popular real estate business (Details) - EUR (€) € in Millions	Mar. 22, 2018	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of detailed information about business combination [line items]
Investments accounted for using equity method		€ 7,588	€ 6,150	€ 6,184	€ 4,836	€ 3,251
Banco Popular Real Estate Business [Member]
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest in subsidiary	49.00%
Contributed assets	€ 10,000
Portion financed with debt, as a percent	70.00%
Aliseda Servicios De Gestion Inmobiliaria SL [Member]
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	51.00%
Blackstone Fund | Banco Popular Real Estate Business [Member]
Disclosure of detailed information about business combination [line items]
Investments accounted for using equity method	€ 1,701,000

Santander Group - Agreement wit

Santander Group - Agreement with Santander Asset Management and Sale of Allfunds (Details) - EUR (€) € in Millions	Nov. 21, 2017	Mar. 07, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 16, 2016
Disclosure of detailed information about business combination [line items]
Proceeds from sale of equity method investment			€ 2,327	€ 883	€ 459
Allfunds Bank Sa [Member]
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest not held by entity		50.00%
Proportion of ownership interest in joint venture to be sold		100.00%		100.00%
Proportion of share capital in disposal group sold	25.00%			25.00%
Proceeds from sale of equity method investment	€ 501			€ 501
Net gain on disposal of investment	€ 297			€ 425
Santander Asset Management [Member]
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired						50.00%
Consideration transferred, acquisition-date fair value						€ 545
Assumed financing						439
Goodwill recognised as of acquisition date						1,173
Identifiable intangible assets recognised as of acquisition date						320
Financial assets recognised as of acquisition date						181
Deferred tax assets recognised as of acquisition date						€ 176

Santander Group - Purchase of s

Santander Group - Purchase of shares SCUSA (Details) - DDFS LLC € in Millions, $ in Millions	Nov. 15, 2017EUR (€)	Jul. 02, 2015	Nov. 15, 2017USD ($)	Nov. 15, 2017EUR (€)
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest under purchase agreement		9.65%
Consideration transferred, acquisition-date fair value			$ 942	€ 800
Decrease in non-controlling interest	€ 492
Decrease in reserve	€ 307

Santander Group - Agreement w_2

Santander Group - Agreement with Banque PSA Finance (Details) € in Millions	Oct. 01, 2015EUR (€)	May 01, 2015EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2015country	Aug. 03, 2015EUR (€)	Feb. 03, 2015EUR (€)	Feb. 02, 2015EUR (€)
Acquisitions Per Agreement To Operate Vehicle And Insurance Financing Business [Member]
Disclosure of detailed information about business combination [line items]
Number of European countries included in agreement for the operation of the vehicle and insurance financing business | country				12
Profit (loss) of acquiree since acquisition date			€ 79
Profit (loss) of combined entity as if combination occurred at beginning of period			118
PSA Banque France
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired							50.00%
Consideration paid							€ 462
PSA Finance UK Limited
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired						50.00%
Consideration paid						€ 148
PSA Insurance Europe Limited and PSA Life Insurance Europe Limited
Disclosure of detailed information about business combination [line items]
Consideration paid		€ 23
Share capital contributed (as a percent)		50.00%
PSA Gestao Comercio E Aluguer de Veiculos S.A.
Disclosure of detailed information about business combination [line items]
Consideration paid					€ 10
Banque PSA Finance Portuguese Branch Loan Portfolio
Disclosure of detailed information about business combination [line items]
Consideration paid					€ 25
PSA Financial Services, Spain, EFC, SA
Disclosure of detailed information about business combination [line items]
Consideration paid	€ 181
Share capital contributed (as a percent)	50.00%
PSA Financial Services, Spain, EFC, SA | PSA Finance Suisse, S.A.
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest in associate	100.00%
Aggregated Under Framework Agreement In Other Countries
Disclosure of detailed information about business combination [line items]
Consideration paid			€ 464
Proportion of ownership interest in subsidiary			50.00%
P SA Finance Arrendamento Mercantil SA
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest in subsidiary			100.00%

Santander Group - Metrovacesa (

Santander Group - Metrovacesa (Details) - EUR (€) € in Millions	Oct. 26, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about business combination [line items]
Investments in associates accounted for using equity method		€ 6,609	€ 4,197	€ 3,242
Increase in investments in joint ventures and associates participation of the business received		2,967	(582)	1,457
Merlin Properties, SOCIMI, S.A.
Disclosure of detailed information about business combination [line items]
Investments in associates accounted for using equity method		€ 1,358	1,242	1,168
Proportion of ownership interest in associate	21.95%
Increase in investments in joint ventures and associates participation of the business received			1,168
Testa Residencial, SOCIMI, S.A.
Disclosure of detailed information about business combination [line items]
Investments in associates accounted for using equity method			651	307
Proportion of ownership interest in associate	46.21%
Increase in investments in joint ventures and associates participation of the business received			307
Metrovacesa Promocion Y Arrendamiento [Member]
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest in associate	70.27%
Metrovacesa, S.A.
Disclosure of detailed information about business combination [line items]
Decrease in real estate investment			3,800
Non-Controlling interest | Metrovacesa, S.A.
Disclosure of detailed information about business combination [line items]
Decrease in minority interest due to operations			€ 621	€ 621

Santander Group - Off-shore ent

Santander Group - Off-shore entities (Details) € in Millions	Dec. 05, 2017country	Dec. 31, 2018EUR (€)employeesubsidiarycountrycompanyitem	Dec. 31, 2017EUR (€)employee	Dec. 31, 2016EUR (€)employee
Disclosure of detailed information about business combination [line items]
Profit (loss) | €		€ 9,315	€ 8,207	€ 7,486
Number of employees | employee		202,713	202,251	188,492
Number of territories included in blacklist in which entity has no presence | country		4
Number of subsidiaries | subsidiary		719
Off-shore entities
Disclosure of detailed information about business combination [line items]
Number of subsidiaries resident in off-shore territories | subsidiary		4
Number of subsidiaries in process of liquidation | item		1
Number of branches | item		4
Number of employees | employee		144
Number of subsidiaries domiciled in off-shore territories not considered to be off-shore entities | item		4
Number of jurisdictions that comply with OECD standards on transparency and exchange of information for fiscal purposes. | item		4
Number of countries blacklisted | country	5
Number of territories included in blacklist in which entity has no presence | item		5
Cayman Islands [Member] | Off-shore entities
Disclosure of detailed information about business combination [line items]
Number of branches | item		2
Jersey And Isle Of Man [Member] | Off-shore entities
Disclosure of detailed information about business combination [line items]
Profit (loss) | €		€ 0.2
Isle Of Man [Member] | Off-shore entities
Disclosure of detailed information about business combination [line items]
Number of subsidiaries resident in off-shore territories | subsidiary		1
Number of branches | item		1
Jersey [Member] | Off-shore entities
Disclosure of detailed information about business combination [line items]
Number of subsidiaries resident in off-shore territories | subsidiary		2
Number of branches | item		1
HONG KONG
Disclosure of detailed information about business combination [line items]
Number of branches | company		1
Number of subsidiaries | company		2
PERU
Disclosure of detailed information about business combination [line items]
Number of subsidiaries in liquidation | company		1
Number of subsidiaries | company		6
SWITZERLAND
Disclosure of detailed information about business combination [line items]
Number of subsidiaries | company		6
URUGUAY
Disclosure of detailed information about business combination [line items]
Number of subsidiaries in liquidation | company		6
Number of subsidiaries | company		12
PANAMA
Disclosure of detailed information about business combination [line items]
Number of subsidiaries | company		1
UK
Disclosure of detailed information about business combination [line items]
Number of tax resident | subsidiary		3
UK | Off-shore entities
Disclosure of detailed information about business combination [line items]
Number of subsidiaries resident in off-shore territories | subsidiary		4
SPAIN
Disclosure of detailed information about business combination [line items]
Number of tax resident | subsidiary		1
UNITED STATES
Disclosure of detailed information about business combination [line items]
Number of tax resident | subsidiary		1

Distribution of the Bank's pr_3

Distribution of the Bank's profit, etc. - Distributions (Details) € / shares in Units, € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)€ / shares
Shareholder remuneration system and earnings per share
First and third interim dividends and final dividend	€ 3,160
Acquisition, with a waiver of exercise, of bonus share rights	132
Total proposed distributions, dividends proposed or declared	3,292
Approved at December 31, 2018	2,237
Final dividend	1,055
To voluntary reserves	9
Net profit for the year	3,301
Amount of shares allocated to the remuneration of shareholders under the shareholder remuneration scheme.	€ 432
Total remuneration per share | € / shares	€ 0.23

Distribution of the Bank's pr_4

Distribution of the Bank's profit, etc. - EPS Basic (Details) - EUR (€) € / shares in Units, € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic earnings per share [abstract]
Profit (loss), attributable to owners of parent	€ 7,810	€ 6,619	€ 6,204
Remuneration of contingently convertible preference shares (CCP) (millions of euros)	(560)	(395)	(334)
Net profit for the year	7,250	6,224	5,870
Profit or Loss from continuing operations (net of non-controlling interests and CCP) (millions of euros)	€ 7,250	€ 6,224	€ 5,870
Weighted average number of shares outstanding	16,150,090,739	15,394,458,789	14,656,359,963
Total basic earnings (loss) per share	€ 0.449	€ 0.404	€ 0.401
Basic earnings per share from discontinued operations (euros)	0	0	0
Basic earnings per share from continuing operations (euros)	€ 0.449	€ 0.404	€ 0.401

Distribution of the Bank's pr_5

Distribution of the Bank's profit, etc. - EPS Diluted (Details) - EUR (€) € / shares in Units, € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Diluted earnings per share [abstract]
Profit (loss), attributable to owners of parent	€ 7,810	€ 6,619	€ 6,204
Remuneration of contingently convertible preference shares (CCP) (millions of euros)	(560)	(395)	(334)
Profit attributable to ordinary equity holders of parent including dilutive effects	7,250	6,224	5,870
Profit or Loss from continuing operations (net of non-controlling interests and CCP) (millions of euros)	€ 7,250	€ 6,224	€ 5,870
Weighted average number of shares outstanding	16,150,090,739	15,394,458,789	14,656,359,963
Dilutive effect of options/rights on shares	42,873,078	50,962,887	45,754,981
Adjusted number of shares	16,192,963,817	15,445,421,676	14,702,114,944
Total diluted earnings (loss) per share	€ 0.448	€ 0.403	€ 0.399
Diluted earnings per share from discontinued operations (euros)	0	0	0
Diluted earnings per share from continuing operations (euros)	€ 0.448	€ 0.403	€ 0.399

Remuneration and other benefi_3

Remuneration and other benefits paid to the Bank's directors and senior managers - Emoluments (Details)	12 Months Ended
	Dec. 31, 2018EUR (€)component	Dec. 31, 2017EUR (€)component
Remuneration of key personnel
By-law stipulated emoluments	€ 4,600,000	€ 4,700,000
Minimum | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments, per director	700,000
Bank's directors and senior managers
Remuneration of key personnel
Remuneration of directors approved by the board of directors	€ 6,000,000	€ 6,000,000
Number of remuneration components | component	2	2
Members of the board of directors
Remuneration of key personnel
Annual emoluments	€ 1,763,000	€ 1,675,000
Annual emoluments, per director	90,000	87,500
Members of the board of directors | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	383,000
Members of the executive committee
Remuneration of key personnel
Annual emoluments	1,275,000	1,345,000
Annual emoluments, per director	170,000	170,000
Members of the executive committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	170,000
Members of the audit committee
Remuneration of key personnel
Annual emoluments	160,000	160,000
Annual emoluments, per director	40,000	40,000
Members of the audit committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee
Remuneration of key personnel
Annual emoluments	113,000	125,000
Annual emoluments, per director	25,000	25,000
Members of the appointments committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	25,000
Members of the remuneration committee
Remuneration of key personnel
Annual emoluments	125,000	123,000
Annual emoluments, per director	25,000	25,000
Members of the remuneration committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	25,000
Members of the risk supervision, regulation and compliance oversight committee
Remuneration of key personnel
Annual emoluments	247,000	280,000
Annual emoluments, per director	40,000	40,000
Members of the risk supervision, regulation and compliance oversight committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	40,000
Members of the responsible banking sustainability and culture committee
Remuneration of key personnel
Annual emoluments	61,000
Annual emoluments, per director	15,000
Chairman of the audit committee
Remuneration of key personnel
Annual emoluments, per director	70,000	50,000
Chairman of the appointments committee
Remuneration of key personnel
Annual emoluments, per director	50,000	50,000
Chairman of the remuneration committee
Remuneration of key personnel
Annual emoluments, per director	50,000	50,000
Chairman of the risk, regulation and compliance oversight committee
Remuneration of key personnel
Annual emoluments, per director	70,000	50,000
Chairman of the responsible banking sustainability and culture committee
Remuneration of key personnel
Annual emoluments, per director	50,000
Coordinating director
Remuneration of key personnel
Annual emoluments, per director	110,000	110,000
Non-executive deputy chairman
Remuneration of key personnel
Annual emoluments, per director	€ 30,000	€ 30,000

Remuneration and other benefi_4

Remuneration and other benefits paid to the Bank's directors and senior managers - Attendance fees (Details) - EUR (€)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Members of the board of directors
Remuneration of key personnel
Attendance fees and commissions, per meeting	€ 2,600	€ 2,600
Audit committee and risk supervision, regulation and compliance oversight committee
Remuneration of key personnel
Attendance fees and commissions, per meeting	1,700	1,700
Other committees
Remuneration of key personnel
Attendance fees and commissions, per meeting	€ 1,500	€ 1,500

Remuneration and other benefi_5

Remuneration and other benefits paid to the Bank's directors and senior managers - Salaries (Details) - Deferred variable compensation plan linked to multiannual objectives	12 Months Ended
	Dec. 31, 2018installment	Dec. 31, 2017payment
Remuneration of key personnel
Immediate payment percentage		40.00%
Deferred percentage	60.00%	60.00%
Variable Remuneration or bonus deferral period		5 years
Number of payments subject to fulfilment of specific objectives | payment		5
Percentage paid in cash	50.00%	50.00%
Percentage paid in shares	50.00%	50.00%
Directors
Remuneration of key personnel
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Variable Remuneration or bonus deferral period	5 years
Number of payments subject to fulfilment of specific objectives | installment	3

Remuneration and other benefi_6

Remuneration and other benefits paid to the Bank's directors and senior managers - Remuneration by Director (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Remuneration of key personnel
Total remuneration	€ 27,761	€ 31,634
Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Total remuneration		10,582
Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Total remuneration		8,893
Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Total remuneration		4,281
Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Total remuneration		473
Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Total remuneration		731
Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Total remuneration		550
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Total remuneration		124
Mrs. Sol Daurella Comadran
Remuneration of key personnel
Total remuneration		207
Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Total remuneration		285
Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Total remuneration		162
Mrs. Belen Romana Garcia
Remuneration of key personnel
Total remuneration		297
Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Total remuneration		170
Mr. Homaira Akbari
Remuneration of key personnel
Total remuneration		159
Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Total remuneration		36
Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Total remuneration		0
Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Total remuneration		4,266
Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Total remuneration		418
Bank's Directors
Remuneration of key personnel
Pension	2,284	5,164
Other remuneration	2,932	2,387
Total remuneration	27,761	31,634
Bank's Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Pension	1,234
Other remuneration	1,030
Total remuneration	10,483
Bank's Directors | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Pension	1,050
Other remuneration	1,596
Total remuneration	8,645
Bank's Directors | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Other remuneration	225
Total remuneration	4,830
Bank's Directors | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Other remuneration	0
Total remuneration	441
Bank's Directors | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Other remuneration	0
Total remuneration	732
Bank's Directors | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Other remuneration	81
Total remuneration	513
Bank's Directors | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Other remuneration	0
Total remuneration	121
Bank's Directors | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Other remuneration	0
Total remuneration	215
Bank's Directors | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Other remuneration	0
Total remuneration	266
Bank's Directors | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Other remuneration	0
Total remuneration	196
Bank's Directors | Mrs. Belen Romana Garcia
Remuneration of key personnel
Other remuneration	0
Total remuneration	414
Bank's Directors | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Other remuneration	0
Total remuneration	108
Bank's Directors | Mr. Homaira Akbari
Remuneration of key personnel
Other remuneration	0
Total remuneration	199
Bank's Directors | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Other remuneration	0
Total remuneration	450
Bank's Directors | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Other remuneration	0
Total remuneration	148
Bank's Directors | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Other remuneration	0
Total remuneration	0
Bank's Directors | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Other remuneration	0
Total remuneration	0
Members of the board of directors
Remuneration of key personnel
Annual emoluments	1,763	1,675
Attendance fees	872	973
Members of the board of directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	90
Attendance fees	39
Members of the board of directors | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	90
Attendance fees	34
Members of the board of directors | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	90
Attendance fees	33
Members of the board of directors | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	120
Attendance fees	81
Members of the board of directors | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	383
Attendance fees	89
Members of the board of directors | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	90
Attendance fees	86
Members of the board of directors | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	90
Attendance fees	31
Members of the board of directors | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	90
Attendance fees	67
Members of the board of directors | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	90
Attendance fees	86
Members of the board of directors | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	90
Attendance fees	58
Members of the board of directors | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	160
Attendance fees	81
Members of the board of directors | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	90
Attendance fees	18
Members of the board of directors | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	90
Attendance fees	61
Members of the board of directors | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	115
Attendance fees	77
Members of the board of directors | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	85
Attendance fees	31
Members of the board of directors | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Attendance fees	0
Members of the board of directors | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Attendance fees	0
Members of the executive committee
Remuneration of key personnel
Annual emoluments	1,275	1,345
Members of the executive committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	85
Members of the executive committee | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	170
Members of the executive committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Members of the executive committee | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee
Remuneration of key personnel
Annual emoluments	160	160
Members of the audit committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	40
Members of the audit committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	40
Members of the audit committee | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	40
Members of the audit committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	40
Members of the audit committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Members of the audit committee | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee
Remuneration of key personnel
Annual emoluments	113	125
Members of the appointments committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	25
Members of the appointments committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	25
Members of the appointments committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	13
Members of the appointments committee | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	25
Members of the appointments committee | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	25
Members of the appointments committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Members of the appointments committee | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee
Remuneration of key personnel
Annual emoluments	125	123
Members of the remuneration committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	25
Members of the remuneration committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	25
Members of the remuneration committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	25
Members of the remuneration committee | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	25
Members of the remuneration committee | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	25
Members of the remuneration committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Members of the remuneration committee | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee
Remuneration of key personnel
Annual emoluments	247	280
Members of the risk supervision, regulation and compliance oversight committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Annual emoluments	20
Members of the risk supervision, regulation and compliance oversight committee | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Annual emoluments	40
Members of the risk supervision, regulation and compliance oversight committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	40
Members of the risk supervision, regulation and compliance oversight committee | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	40
Members of the risk supervision, regulation and compliance oversight committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	40
Members of the risk supervision, regulation and compliance oversight committee | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	40
Members of the risk supervision, regulation and compliance oversight committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	27
Members of the risk supervision, regulation and compliance oversight committee | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Annual emoluments	0
Members of the risk supervision, regulation and compliance oversight committee | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Annual emoluments	0
Members of the responsible banking sustainability and culture committee
Remuneration of key personnel
Annual emoluments	61
Members of the responsible banking sustainability and culture committee | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mrs. Belen Romana Garcia
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mr. Homaira Akbari
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Annual emoluments	8
Members of the responsible banking sustainability and culture committee | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Annual emoluments	5
Directors
Remuneration of key personnel
Fixed salary	7,517	7,568
Variable compensation, immediate payments, cash	3,254	3,698
Variable compensation, immediate payments, in shares	3,254	3,698
Deferred variable compensation, cash	1,952	2,219
Deferred variable compensation, in shares	1,952	2,219
Total Short-term and deferred (not subject to long term goals) salaries	17,929	19,402
Pension	0	€ 0	€ 0	€ 0
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Fixed salary	3,176
Variable compensation, immediate payments, cash	1,480
Variable compensation, immediate payments, in shares	1,480
Deferred variable compensation, cash	888
Deferred variable compensation, in shares	888
Total Short-term and deferred (not subject to long term goals) salaries	7,912
Directors | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Fixed salary	2,541
Variable compensation, immediate payments, cash	989
Variable compensation, immediate payments, in shares	989
Deferred variable compensation, cash	593
Deferred variable compensation, in shares	593
Total Short-term and deferred (not subject to long term goals) salaries	5,705
Directors | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Fixed salary	1,800
Variable compensation, immediate payments, cash	785
Variable compensation, immediate payments, in shares	785
Deferred variable compensation, cash	471
Deferred variable compensation, in shares	471
Total Short-term and deferred (not subject to long term goals) salaries	4,312
Directors | Mr. Guillermo de la Dehesa Romero
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Bruce Carnegie-Brown
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Ignacio Benjumea Cabeza de Vaca
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member]
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mrs. Sol Daurella Comadran
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Carlos Fernandez Gonzalez
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mrs. Esther Gimenez-Salinas i Colomer
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mrs. Belen Romana Garcia
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Juan Miguel Villar Mir
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Homaira Akbari
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Ramiro Mato Garca Ansorena
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Alvaro Cardoso De Souza [Member]
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	0
Directors | Mrs. Isabel Tocino Biscarolasaga
Remuneration of key personnel
Fixed salary	0
Variable compensation, immediate payments, cash	0
Variable compensation, immediate payments, in shares	0
Deferred variable compensation, cash	0
Deferred variable compensation, in shares	0
Total Short-term and deferred (not subject to long term goals) salaries	€ 0

Remuneration and other benefi_7

Remuneration and other benefits paid to the Bank's directors and senior managers - Remuneration by Director - Multiannual (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Directors | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Compensation received as a non-executive director of U.C.I., S.A.		€ 42
Deferred variable compensation plan linked to multiannual objectives
Remuneration of key personnel
Fair value of plan, initial achievement	70.00%
Deferred variable compensation plan linked to multiannual objectives | Minimum
Remuneration of key personnel
Reasonable initial achievement ratio	60.00%
Deferred variable compensation plan linked to multiannual objectives | Maximum
Remuneration of key personnel
Reasonable initial achievement ratio	80.00%
Deferred variable compensation plan linked to multiannual objectives | Directors
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash	€ 2,050
Variable compensation subject to Long-term objectives, in shares	2,050
Total	€ 4,100	4,660
Number of years of compensation subject to conditions of continued service	3 years
Fair value of plan, initial achievement	70.00%
Deferred variable compensation plan linked to multiannual objectives | Directors | Minimum
Remuneration of key personnel
Reasonable initial achievement ratio	60.00%
Deferred variable compensation plan linked to multiannual objectives | Directors | Maximum
Remuneration of key personnel
Reasonable initial achievement ratio	80.00%
Deferred variable compensation plan linked to multiannual objectives | Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash	€ 932
Variable compensation subject to Long-term objectives, in shares	932
Total	1,864	1,726
Deferred variable compensation plan linked to multiannual objectives | Directors | Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash	623
Variable compensation subject to Long-term objectives, in shares	623
Total	1,246	1,154
Deferred variable compensation plan linked to multiannual objectives | Directors | Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash	495
Variable compensation subject to Long-term objectives, in shares	495
Total	990	900
Deferred variable compensation plan linked to multiannual objectives | Directors | Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash	0
Variable compensation subject to Long-term objectives, in shares	0
Total	€ 0	€ 880

Remuneration and other benefi_8

Remuneration and other benefits paid to the Bank's directors and senior managers - Post-employment (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related party transactions key personnel
Period for investment in bank shares from date of termination	5 years
Insurance
Disbursed for payment of civil liability insurance premium	€ 10,100	€ 10,500
Bank's Directors
Related party transactions key personnel
Employer contributions to welfare system	€ 2,284	5,164
Pensionable base, expressed as a percent of fixed remuneration	22.00%
Directors
Related party transactions key personnel
Employer contributions to welfare system	€ 0	0	€ 0	€ 0
Balances held under the welfare system	76,337	75,906
Provisions for employee benefits	2,284	5,163
Directors | Life insurance
Insurance
Life insurance, Insured sum	47,804	18,000
Other directors
Related party transactions key personnel
Contributions to plan	900	900
Other directors | Life insurance
Insurance
Life insurance, Insured sum	0	0
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Bank's Directors
Related party transactions key personnel
Employer contributions to welfare system	€ 1,234
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors
Related party transactions key personnel
Annual contribution, percentage of variable remuneration	30.00%
Balances held under the welfare system	€ 46,093	45,798
Provisions for employee benefits	1,234	2,707
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors | Life insurance
Insurance
Life insurance, Insured sum	22,710	7,500
Mr. Jose Antonio Alvarez Alvarez | Bank's Directors
Related party transactions key personnel
Employer contributions to welfare system	1,050
Mr. Jose Antonio Alvarez Alvarez | Directors
Related party transactions key personnel
Balances held under the welfare system	16,630	16,151
Provisions for employee benefits	1,050	2,456
Mr. Jose Antonio Alvarez Alvarez | Directors | Life insurance
Insurance
Life insurance, Insured sum	19,694	6,000
Mr. Rodrigo Echenique Gordillo | Directors
Related party transactions key personnel
Balances held under the welfare system	13,614	13,957
Mr. Rodrigo Echenique Gordillo | Directors | Life insurance
Insurance
Life insurance, Insured sum	5,400	4,500
Mr. Matias Rodriguez Inciarte
Related party transactions key personnel
Pension rights		48,750
Insurance
Life insurance, Insured sum		€ 5,131
Mr. Matias Rodriguez Inciarte | Directors | Life insurance
Insurance
Life insurance, Insured sum

Remuneration, etc. - Deferred v

Remuneration, etc. - Deferred variable remuneration systems (Details)	12 Months Ended		60 Months Ended
	Dec. 31, 2018itemcompanyperiod	Dec. 31, 2017itemperiod	Dec. 31, 2015
Related party transactions key personnel
Award, number of shares	267,204
Maximum
Related party transactions key personnel
Award, number of shares	406,889
Current senior managers
Related party transactions key personnel
Award, number of shares	1,936,037	1,430,143
Deferred variable compensation plan linked to multiannual objectives
Related party transactions key personnel
Deferred percentage	60.00%	60.00%
Variable Remuneration or bonus deferral period		5 years
Number of trading sessions | period		15
Number of credit institutions included in reference group | company	17
Percentage paid in cash	50.00%	50.00%
Percentage paid in shares	50.00%	50.00%
Deferred variable compensation plan linked to multiannual objectives | Directors
Related party transactions key personnel
Deferred percentage	60.00%
Variable Remuneration or bonus deferral period	5 years
Deferred variable compensation plan linked to multiannual objectives | Other directors
Related party transactions key personnel
Variable Remuneration or bonus deferral period	3 years
Deferred conditional variable remuneration plan
Related party transactions key personnel
Deferred percentage			60.00%
Variable Remuneration or bonus deferral period			5 years
Deferred conditional variable remuneration plan | Directors
Related party transactions key personnel
Number of trading sessions | period	15
Bonus plans approved up to 2014
Related party transactions key personnel
Variable Remuneration or bonus deferral period			3 years
ILP | Directors
Related party transactions key personnel
Percentage of maximum established benchmark	91.50%
ILP | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors
Related party transactions key personnel
Award, number of shares	122,849
Ratio awarded, as a percent	65.67%
ILP | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors | Maximum
Related party transactions key personnel
Award, number of shares	187,070
ILP | Mr. Jose Antonio Alvarez Alvarez | Directors
Related party transactions key personnel
Award, number of shares	82,927
Ratio awarded, as a percent	65.67%
ILP | Mr. Jose Antonio Alvarez Alvarez | Directors | Maximum
Related party transactions key personnel
Award, number of shares	126,279
ILP | Mr. Rodrigo Echenique Gordillo | Directors
Related party transactions key personnel
Award, number of shares	61,428
Ratio awarded, as a percent	65.67%
ILP | Mr. Rodrigo Echenique Gordillo | Directors | Maximum
Related party transactions key personnel
Award, number of shares	93,540
Banco Santander S.A. (Mexico) | Current senior managers
Related party transactions key personnel
Award, number of shares		225,564

Remuneration, etc. - Share-base

Remuneration, etc. - Share-based Variable Remuneration (Details)	12 Months Ended
	Dec. 31, 2018iteminstallment$ / sharesshares	Dec. 31, 2017itempaymentshares
Disclosure of transactions between related parties [line items]
Theoretical value per right | $ / shares	$ 0.1047
Deferred variable compensation plan linked to multiannual objectives
Share-based variable remuneration
Immediate payment percentage		40.00%
Deferred percentage	60.00%	60.00%
Variable Remuneration or bonus deferral period		5 years
Number of payments subject to fulfilment of specific objectives | payment		5
Mr. Ignacio Benjumea Cabeza de Vaca | Deferred variable compensation plan linked to multiannual objectives | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at end of period	106,113
Directors
Disclosure of transactions between related parties [line items]
Percentage of plan accrued	20.00%
Directors | Deferred variable compensation plan linked to multiannual objectives
Share-based variable remuneration
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Variable Remuneration or bonus deferral period	5 years
Number of payments subject to fulfilment of specific objectives | installment	3
Directors | 2012 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)		(87,228)
Directors | 2012 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period		87,228
Maximum number of shares to be delivered at end of period
Directors | 2013 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(135,405)	(133,419)
Shares arising from the capital increase of July 2017		1,985
Directors | 2013 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	135,405	266,839
Maximum number of shares to be delivered at end of period		135,405
Directors | 2014 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(182,906)	(180,224)
Shares arising from the capital increase of July 2017		10,727
Directors | 2014 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	731,621	901,118
Maximum number of shares to be delivered at end of period	548,715	731,621
Directors | 2015 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)		(656,031)
Shares delivered (deferred payment variable remuneration)	(199,739)
Shares arising from the capital increase of July 2017		14,644
Directors | 2015 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	998,690	1,640,077
Maximum number of shares to be delivered at end of period	798,951	998,690
Directors | 2016 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)	(620,243)
Directors | 2016 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	1,550,610
Maximum number of shares to be delivered | item		1,550,610
Maximum number of shares to be delivered at end of period	930,366	1,550,610
Directors | 2017 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered | item	1,892,973
Maximum number of shares to be delivered at end of period	1,892,973
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2012 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)		(33,120)
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2012 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period		33,120
Maximum number of shares to be delivered at end of period
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2013 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(61,721)	(60,814)
Shares arising from the capital increase of July 2017		905
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2013 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	61,721	121,630
Maximum number of shares to be delivered at end of period		61,721
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2014 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(64,404)	(63,460)
Shares arising from the capital increase of July 2017		3,777
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2014 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	257,617	317,300
Maximum number of shares to be delivered at end of period	193,213	257,617
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2015 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)		(236,817)
Shares delivered (deferred payment variable remuneration)	(72,102)
Shares arising from the capital increase of July 2017		5,286
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2015 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	360,512	592,043
Maximum number of shares to be delivered at end of period	288,410	360,512
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2016 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)	(229,750)
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2016 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	574,375
Maximum number of shares to be delivered | item		574,375
Maximum number of shares to be delivered at end of period	344,625	574,375
Directors | Mrs. Ana Botin-Sanz de Sautuola y O'Shea | 2017 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered | item	860,865
Maximum number of shares to be delivered at end of period	860,865
Directors | Mr. Jose Antonio Alvarez Alvarez | 2012 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)		(19,561)
Directors | Mr. Jose Antonio Alvarez Alvarez | 2012 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period		19,561
Maximum number of shares to be delivered at end of period
Directors | Mr. Jose Antonio Alvarez Alvarez | 2013 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(26,632)	(26,242)
Shares arising from the capital increase of July 2017		390
Directors | Mr. Jose Antonio Alvarez Alvarez | 2013 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	26,632	52,484
Maximum number of shares to be delivered at end of period		26,632
Directors | Mr. Jose Antonio Alvarez Alvarez | 2014 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(42,811)	(42,183)
Shares arising from the capital increase of July 2017		2,511
Directors | Mr. Jose Antonio Alvarez Alvarez | 2014 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	171,242	210,914
Maximum number of shares to be delivered at end of period	128,431	171,242
Directors | Mr. Jose Antonio Alvarez Alvarez | 2015 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)		(159,843)
Shares delivered (deferred payment variable remuneration)	(48,667)
Shares arising from the capital increase of July 2017		3,568
Directors | Mr. Jose Antonio Alvarez Alvarez | 2015 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	243,332	399,607
Maximum number of shares to be delivered at end of period	194,665	243,332
Directors | Mr. Jose Antonio Alvarez Alvarez | 2016 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)	(153,647)
Directors | Mr. Jose Antonio Alvarez Alvarez | 2016 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	384,118
Maximum number of shares to be delivered | item		384,118
Maximum number of shares to be delivered at end of period	230,471	384,118
Directors | Mr. Jose Antonio Alvarez Alvarez | 2017 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered | item	575,268
Maximum number of shares to be delivered at end of period	575,268
Directors | Mr. Rodrigo Echenique Gordillo | 2014 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(31,712)	(31,247)
Shares arising from the capital increase of July 2017		1,860
Directors | Mr. Rodrigo Echenique Gordillo | 2014 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	126,846	156,233
Maximum number of shares to be delivered at end of period	95,134	126,846
Directors | Mr. Rodrigo Echenique Gordillo | 2015 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)		(118,389)
Shares delivered (deferred payment variable remuneration)	(36,046)
Shares arising from the capital increase of July 2017		2,643
Directors | Mr. Rodrigo Echenique Gordillo | 2015 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	180,226	295,972
Maximum number of shares to be delivered at end of period	144,180	180,226
Directors | Mr. Rodrigo Echenique Gordillo | 2016 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)	(119,738)
Directors | Mr. Rodrigo Echenique Gordillo | 2016 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	299,346
Maximum number of shares to be delivered | item		299,346
Maximum number of shares to be delivered at end of period	179,608	299,346
Directors | Mr. Rodrigo Echenique Gordillo | 2017 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered | item	456,840
Maximum number of shares to be delivered at end of period	456,840
Directors | Mr. Matias Rodriguez Inciarte | 2012 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)		(34,547)
Directors | Mr. Matias Rodriguez Inciarte | 2012 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period		34,547
Maximum number of shares to be delivered at end of period
Directors | Mr. Matias Rodriguez Inciarte | 2013 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(47,052)	(46,363)
Shares arising from the capital increase of July 2017		690
Directors | Mr. Matias Rodriguez Inciarte | 2013 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	47,052	92,725
Maximum number of shares to be delivered at end of period		47,052
Directors | Mr. Matias Rodriguez Inciarte | 2014 variable remuneration
Share-based variable remuneration
Shares delivered (deferred payment variable remuneration)	(43,979)	(43,334)
Shares arising from the capital increase of July 2017		2,579
Directors | Mr. Matias Rodriguez Inciarte | 2014 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	175,916	216,671
Maximum number of shares to be delivered at end of period	131,937	175,916
Directors | Mr. Matias Rodriguez Inciarte | 2015 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)		(140,982)
Shares delivered (deferred payment variable remuneration)	(42,924)
Shares arising from the capital increase of July 2017		3,147
Directors | Mr. Matias Rodriguez Inciarte | 2015 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	214,620	352,455
Maximum number of shares to be delivered at end of period	171,696	214,620
Directors | Mr. Matias Rodriguez Inciarte | 2016 variable remuneration
Share-based variable remuneration
Shares delivered (immediate payment variable remuneration)	(117,108)
Directors | Mr. Matias Rodriguez Inciarte | 2016 variable remuneration | Maximum
Share-based variable remuneration
Maximum number of shares to be delivered at beginning of period	292,771
Maximum number of shares to be delivered | item		292,771
Maximum number of shares to be delivered at end of period	175,662	292,771

Remuneration, etc. - Share-ba_2

Remuneration, etc. - Share-based Variable Remuneration - Cash Delivery (Details) - Directors - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Remuneration of key personnel
Cash paid, immediate	€ 3,000	€ 3,339
Cash paid, deferred	1,826	2,099
Mrs. Ana Botin-Sanz de Sautuola y O'Shea
Remuneration of key personnel
Cash paid, immediate	1,370	1,205
Cash paid, deferred	947	825
Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Cash paid, immediate	916	814
Cash paid, deferred	574	461
Mr. Rodrigo Echenique Gordillo
Remuneration of key personnel
Cash paid, immediate	714	603
Cash paid, deferred	305	124
Mr. Matias Rodriguez Inciarte
Remuneration of key personnel
Cash paid, immediate	0	718
Cash paid, deferred	€ 0	€ 690

Remuneration, etc. - Share-ba_3

Remuneration, etc. - Share-based Variable Remuneration - Former directors (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Performance Share Plan Second Cycle 2015 [Member]
Remuneration of key personnel
Ratio awarded, as a percent	65.67%
Retired executive directors
Remuneration of key personnel
Cash paid, deferred	€ 685	€ 1,224
Retired executive directors | Deferred Conditional Variable Remuneration Plan Third Cycle 2013 [Member]
Remuneration of key personnel
Number of shares delivered	0	80,718
Retired executive directors | Deferred Conditional Variable Remuneration Plan Fourth Cycle 2014 [Member]
Remuneration of key personnel
Number of shares delivered	101,537	100,049
Retired executive directors | Deferred Conditional Variable Remuneration Plan Fourth Cycle 2014 [Member] | Maximum
Remuneration of key personnel
Maximum number of shares to be delivered	0	101,537
Retired executive directors | Deferred Conditional Variable Remuneration Plan Fifth Cycle 2015 [Member]
Remuneration of key personnel
Number of shares delivered	16,868	16,621
Retired executive directors | Deferred Conditional Variable Remuneration Plan Fifth Cycle 2015 [Member] | Maximum
Remuneration of key personnel
Maximum number of shares to be delivered	50,604	67,472
Retired executive directors | Deferred Conditional Variable Remuneration Plan Sixth Cycle 2016 [Member]
Remuneration of key personnel
Number of shares delivered	0	0
Retired executive directors | Deferred Conditional Variable Remuneration Plan Sixth Cycle 2016 [Member] | Maximum
Remuneration of key personnel
Maximum number of shares to be delivered	0	0
Retired executive directors | Performance Share Plan Second Cycle 2015 [Member] | Maximum
Remuneration of key personnel
Maximum number of shares to be delivered	33,785	51,447
Retired senior managers
Remuneration of key personnel
Shares arising from the capital increase of July 2017	3,233

Remuneration, etc. - Loans (Det

Remuneration, etc. - Loans (Details) - EUR (€) € in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	€ 178	€ 88
Loan commitments
Direct risk exposure
Risk exposure on loan commitments, etc.	218,083,000	207,671,000	€ 202,097,000
Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	178	88
Financial Guarantees
Direct risk exposure
Risk exposure on loan commitments, etc.	11,723,000	14,499,000	€ 17,244,000
Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	18	10
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	18	10
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Jose Antonio Alvarez Alvarez | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	8	9
Mr. Jose Antonio Alvarez Alvarez | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	8	9
Mr. Jose Antonio Alvarez Alvarez | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Bruce Carnegie-Brown | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Bruce Carnegie-Brown | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Bruce Carnegie-Brown | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Matias Rodriguez Inciarte | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Matias Rodriguez Inciarte | Loan commitments
Direct risk exposure
Risk exposure on loan commitments, etc.		13
Mr. Matias Rodriguez Inciarte | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Matias Rodriguez Inciarte | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Rodrigo Echenique Gordillo | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	29	22
Mr. Rodrigo Echenique Gordillo | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	29	22
Mr. Rodrigo Echenique Gordillo | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member] | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	15	17
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member] | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	15	17
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member] | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mrs. Sol Daurella Comadran | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	53	27
Mrs. Sol Daurella Comadran | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	53	27
Mrs. Sol Daurella Comadran | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Carlos Fernandez Gonzalez [Member] | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	12
Mr. Carlos Fernandez Gonzalez [Member] | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	12
Mr. Carlos Fernandez Gonzalez [Member] | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mrs. Esther Gimenez-Salinas I Colomer [Member] | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	1
Mrs. Esther Gimenez-Salinas I Colomer [Member] | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	1
Mrs. Esther Gimenez-Salinas I Colomer [Member] | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Ignacio Benjumea Cabeza de Vaca | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Ignacio Benjumea Cabeza de Vaca | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0
Mr. Ignacio Benjumea Cabeza de Vaca | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mrs. Belen Romana Garcia | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	21	3
Mrs. Belen Romana Garcia | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	21	3
Mrs. Belen Romana Garcia | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	0	0
Mr. Guillermo de la Dehesa Romero | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	21
Mr. Guillermo de la Dehesa Romero | Loan commitments | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	21
Mr. Guillermo de la Dehesa Romero | Financial Guarantees | Bank's Directors
Direct risk exposure
Risk exposure on loan commitments, etc.	€ 0	€ 0

Remuneration, etc. - Senior Man

Remuneration, etc. - Senior Managers Remuneration - Short-term (Details)	12 Months Ended
	Dec. 31, 2018EUR (€)itememployee	Dec. 31, 2017EUR (€)itememployeeshares	Dec. 31, 2016employee
Remuneration of key personnel
Number of persons | employee	202,713	202,251	188,492
Total remuneration	€ 27,761,000	€ 31,634,000
Award, number of shares | item	267,204
Current senior managers
Remuneration of key personnel
Number of persons | employee	18	19
Fixed salary	€ 22,475,000	€ 17,847,000
Pension	6,193,000	13,511,000
Other remuneration	7,263,000	7,348,000
Total remuneration	60,261,000	64,568,000
Other remuneration, life insurance premiums	€ 1,641,000	€ 692,000
Award, number of shares | item	1,936,037	1,430,143
Long-term and deferred compensation		€ 4,650,000
Maximum number of shares to be delivered | shares		648,457
Deferred conditional variable remuneration plan | Current senior managers
Remuneration of key personnel
Variable compensation, immediate payments, cash	€ 3,791,000	€ 4,052,000
Variable compensation, immediate payments, in shares	3,791,000	4,052,000
ILP | Current senior managers
Remuneration of key personnel
Variable compensation, immediate payments, cash	8,374,000	8,879,000
Variable compensation, immediate payments, in shares	€ 8,374,000	€ 8,879,000

Remuneration, etc. - Senior M_2

Remuneration, etc. - Senior Managers Remuneration - Multiannual (Details) € in Thousands	12 Months Ended
	Dec. 31, 2018EUR (€)employee	Dec. 31, 2017EUR (€)employee	Dec. 31, 2016employee
Remuneration of key personnel
Number of persons | employee	202,713	202,251	188,492
Current senior managers
Remuneration of key personnel
Number of persons | employee	18	19
Female remuneration in excess of male, as a percent	0.70%
Retired senior managers
Remuneration of key personnel
Variable compensation subject to Long-term objectives, in cash		€ 999
Salaries and other remuneration related to retirement	€ 1,861	€ 5,237
Deferred variable compensation plan linked to multiannual objectives | Current senior managers
Remuneration of key personnel
Number of persons | employee	18	19
Variable compensation subject to Long-term objectives, in cash	€ 3,981	€ 4,255
Variable compensation subject to Long-term objectives, in shares	3,981	4,255
Total	€ 7,962	€ 8,510

Remuneration, etc. - Share-ba_4

Remuneration, etc. - Share-based Variable Remuneration - Senior Managers - Shares Delivered (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Remuneration of key personnel
Net charge to income	€ 84	€ 88	€ 81
Amount paid for retirement pension benefit		€ 260	€ 20
Current senior managers
Remuneration of key personnel
Shares arising from the capital increase of July 2017	66,339
Maximum number of shares to be delivered		648,457
Holding period for shares issued in settlement of pension obligations	5 years
Pension system balance	€ 66.5	€ 118.7
Net charge to income	€ 6.4	€ 14.5
Executive vice presidents | 2012 variable remuneration
Remuneration of key personnel
Number of shares delivered	0	226,766
Executive vice presidents | 2013 variable remuneration
Remuneration of key personnel
Number of shares delivered	248,963	318,690
Executive vice presidents | 2014 variable remuneration
Remuneration of key personnel
Number of shares delivered	261,109	349,725
Executive vice presidents | Deferred conditional variable remuneration plan and linked to objectives (2016)
Remuneration of key personnel
Number of shares delivered	258,350	0
Retired senior managers
Remuneration of key personnel
Shares arising from the capital increase of July 2017	3,233
Amount paid for retirement pension benefit	€ 0	€ 0
Capital insured by life and accident insurance	€ 133.3	€ 53.6
Maximum | Current senior managers | 2013 variable remuneration
Remuneration of key personnel
Maximum number of shares to be delivered	0	323,424
Maximum | Current senior managers | 2014 variable remuneration
Remuneration of key personnel
Maximum number of shares to be delivered	705,075	1,296,424
Maximum | Current senior managers | Performance shares plan ILP (2015)
Remuneration of key personnel
Maximum number of shares to be delivered	515,456	1,050,087
Maximum | Current senior managers | Deferred conditional variable remuneration plan and linked to objectives (2016)
Remuneration of key personnel
Maximum number of shares to be delivered	1,079,654	1,854,495
Maximum | Current senior managers | Deferred conditional variable remuneration plan and linked to objectives (2017)
Remuneration of key personnel
Maximum number of shares to be delivered	1,434,047	1,779,302
Maximum | Current senior managers | Share Based Variable Remuneration Award Linked To Objectives 2018 [Member]
Remuneration of key personnel
Maximum number of shares to be delivered	2,192,901	0
Minimum | Current senior managers
Remuneration of key personnel
Discretionary pension contribution percentage	15.00%

Remuneration, etc. - Share-ba_5

Remuneration, etc. - Share-based Variable Remuneration - Post-employment - former directors and executive vice presidents (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Remuneration of key personnel
Amounts paid for post-employment benefits and settlements		€ 260,000	€ 20,000
Period provision for pension and similar obligations	€ 84,000	88,000	81,000
Provisions	13,225,000	14,489,000	€ 14,459,000	€ 14,686,000	€ 14,494,000
Former directors of the bank
Remuneration of key personnel
Amounts paid for post-employment benefits and settlements	13,800	26,200
Period provision for pension and similar obligations	80	500
Former directors of the bank | Provision for post-employment defined benefit obligations
Remuneration of key personnel
Provisions	70,200	81,800
Former executive vice presidents
Remuneration of key personnel
Amounts paid for post-employment benefits and settlements	63,000	17,700
Period provision for pension and similar obligations		5,600
Former executive vice presidents | Provision for post-employment defined benefit obligations
Remuneration of key personnel
Provisions	179,000	195,800
Former Members of Bank
Remuneration of key personnel
Contribution to insurance policies	500	500
Former Managing Directors
Remuneration of key personnel
Contribution to insurance policies	€ 5,400	€ 5,500

Remuneration, etc. - Pre-retire

Remuneration, etc. - Pre-retirement and retirement (Details)	12 Months Ended
	Dec. 31, 2018period
Remuneration of key personnel
Period for Malus and Clawback	5 years
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors
Remuneration of key personnel
Annual contribution, percentage of average variable remuneration	30.00%
Pre-retirement age	60 years
Number of months required to remain available under terms of employment contract	4 months
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Directors | Maximum
Remuneration of key personnel
Number of annual periods used as basis for variable remuneration	3
Percentage reduction in emolument for pre-retirement	8.00%
Mr. Jose Antonio Alvarez Alvarez
Remuneration of key personnel
Period for Malus and Clawback	5 years

Remuneration, etc. - Conflicts

Remuneration, etc. - Conflicts of interest and other (Details)	12 Months Ended
	Dec. 31, 2018individualVoteshares
Members of the board of directors and persons related to them
Conflict of interest and other information
Number of key personnel with conflicts of interest | individual	0
Other directors
Conflict of interest and other information
Number of abstentions | Vote	60
Number of abstentions, appointments | Vote	26
Number of abstentions, remuneration or extension of loans | Vote	30
Number of abstentions, financing transactions | Vote	1
Number of abstentions, status verification | Vote	3
Mrs. Ana Botin-Sanz de Sautuola y O'Shea | Bankinter, S.A. | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	5,000,000
Mr. Bruce Carnegie-Brown | Moneysupermarket.com Group plc | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	30,000
Mr. Bruce Carnegie-Brown | Lloyd's Of London Ltd | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	0
Mr. Rodrigo Echenique Gordillo | Mitsubishi UFJ Financial Group | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	17,500
Mr. Guillermo de la Dehesa Romero | The Goldman Sachs Group, Inc. | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	19,546
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member] | Bankinter, S.A. | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	6,929,853
Francisco Javier Botin Sanz De Sautuola Y O'Shea [Member] | JB Capital Markets Sociedad de Valores, S.A. | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	2,077,198
Mrs. Esther Gimenez-Salinas i Colomer | Gawa Capital Partners, S.L. | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	0
Mr. Ramiro Mato Garca Ansorena | BNP Paribas | Members of the board of directors and persons related to them
Conflict of interest and other information
Number of shares	13,806

Loans and advances to banks (De

Loans and advances to banks (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Financial assets held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets at amortised cost	946,099	909,094
Loans and receivables			903,013	840,004
Gross carrying amount | Reverse repurchase agreements
Disclosure of financial assets [line items]
Total financial assets	32,310		18,864	16,609
Gross carrying amount | Impaired Assets Financial Instrument Type [Member]
Disclosure of financial assets [line items]
Total financial assets	34,218		36,280	32,573
Gross carrying amount | Next 12 months | Financial instruments not credit-impaired [member]
Disclosure of financial assets [line items]
Total financial assets	154,164
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Disclosure of financial assets [line items]
Total financial assets	117
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Disclosure of financial assets [line items]
Total financial assets	870
Loans and advances
Disclosure of financial assets [line items]
Financial assets held for trading	202	10,468	10,511	12,725
Non-trading financial assets mandatorily at fair value through profit or loss	1,883	611
Financial assets designated at fair value through profit or loss	54,238	38,789	30,364	27,665
Financial assets at fair value through other comprehensive income	1,601	1,107
Financial assets at amortised cost	908,403	€ 873,322
Loans and receivables			885,470	826,767
Loans And Advances Central Banks And Credit Institutions [Member]
Disclosure of financial assets [line items]
Total financial assets	83,406		77,430	76,687
Loans And Advances Central Banks And Credit Institutions [Member] | EUR
Disclosure of financial assets [line items]
Total financial assets	24,801		23,286	24,278
Loans And Advances Central Banks And Credit Institutions [Member] | GBP
Disclosure of financial assets [line items]
Total financial assets	4,073		5,582	4,337
Loans And Advances Central Banks And Credit Institutions [Member] | USD
Disclosure of financial assets [line items]
Total financial assets	19,238		15,325	11,996
Loans And Advances Central Banks And Credit Institutions [Member] | BRL
Disclosure of financial assets [line items]
Total financial assets	28,310		28,140	32,013
Loans And Advances Central Banks And Credit Institutions [Member] | Other currencies
Disclosure of financial assets [line items]
Total financial assets	6,984		5,097	4,063
Loans And Advances Central Banks And Credit Institutions [Member] | Gross carrying amount | Next 12 months | Financial instruments not credit-impaired [member]
Disclosure of financial assets [line items]
Total financial assets	51,090
Loans And Advances Central Banks And Credit Institutions [Member] | Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Disclosure of financial assets [line items]
Total financial assets	1
Loans And Advances Central Banks And Credit Institutions [Member] | Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Disclosure of financial assets [line items]
Total financial assets	2
Loans And Advances Central Banks And Credit Institutions [Member] | Accumulated impairment | Next 12 months | Financial instruments not credit-impaired [member]
Disclosure of financial assets [line items]
Total financial assets	(12)
Loans and advances - Central banks
Disclosure of financial assets [line items]
Financial assets designated at fair value through profit or loss	9,226
Financial assets at amortised cost	15,601
Loans and receivables			26,278	27,973
Total financial assets	24,827		26,278	27,973
Loans and advances - Central banks | Gross carrying amount | Time Deposits [Member]
Disclosure of financial assets [line items]
Total financial assets	15,601		17,359	14,445
Loans and advances - Central banks | Gross carrying amount | Reverse repurchase agreements
Disclosure of financial assets [line items]
Total financial assets	9,226		8,919	13,528
Loans and advances - Credit institutions
Disclosure of financial assets [line items]
Financial assets held for trading			1,696	3,221
Non-trading financial assets mandatorily at fair value through profit or loss	2
Financial assets designated at fair value through profit or loss	23,097		9,889	10,069
Financial assets at amortised cost	35,480
Loans and receivables			39,567	35,424
Total financial assets	58,579		51,152	48,714
Loans and advances - Credit institutions | Gross carrying amount | Time Deposits [Member]
Disclosure of financial assets [line items]
Total financial assets	10,759		8,169	6,577
Loans and advances - Credit institutions | Gross carrying amount | Reverse repurchase agreements
Disclosure of financial assets [line items]
Total financial assets	33,547		21,765	20,867
Loans and advances - Credit institutions | Gross carrying amount | Non-loan Advances [Member]
Disclosure of financial assets [line items]
Total financial assets	14,283		21,232	21,281
Loans and advances - Credit institutions | Gross carrying amount | Impaired Assets Financial Instrument Type [Member]
Disclosure of financial assets [line items]
Total financial assets	2		4	4
Loans and advances - Credit institutions | Accumulated impairment | Valuation Adjustment For Impairment Financial Instrument Type [Member]
Disclosure of financial assets [line items]
Total financial assets	€ (12)		€ (18)	€ (15)

Debt Instruments - Summary (Det

Debt Instruments - Summary (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instruments
Financial assets held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets available-for-sale			133,271	116,774
Financial assets at amortised cost	946,099	909,094
Loans and receivables			903,013	840,004
Held-to-maturity investments			13,491	14,468
Debt instruments
Debt Instruments
Financial assets held for trading	27,800	36,554	36,351	48,922
Non-trading financial assets mandatorily at fair value through profit or loss	5,587	1,792
Financial assets designated at fair value through profit or loss	3,222	3,286	3,485	3,398
Financial assets at fair value through other comprehensive income	116,819	122,077
Financial assets available-for-sale	118,420		128,481	111,287
Financial assets at amortised cost	37,696	35,772
Loans and receivables			17,543	13,237
Held-to-maturity investments			13,491	14,468
Total financial assets	191,124		199,351	191,312
Gross carrying amount | Next 12 months | Financial instruments not credit-impaired [member]
Debt Instruments
Total financial assets	154,164
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Debt Instruments
Total financial assets	117
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Debt Instruments
Total financial assets	870
Gross carrying amount | Debt instruments
Debt Instruments
Total financial assets	191,759		200,081	191,810
Gross carrying amount | Debt instruments | Financial instruments credit-impaired
Debt Instruments
Total financial assets	870		1,017	773
Gross carrying amount | Debt instruments | EUR
Debt Instruments
Total financial assets	76,513		93,250	73,791
Gross carrying amount | Debt instruments | GBP
Debt Instruments
Total financial assets	19,153		16,203	16,106
Gross carrying amount | Debt instruments | USD
Debt Instruments
Total financial assets	22,864		25,191	31,401
Gross carrying amount | Debt instruments | BRL
Debt Instruments
Total financial assets	40,871		39,233	43,370
Gross carrying amount | Debt instruments | Other currencies
Debt Instruments
Total financial assets	32,358		26,204	27,142
Gross carrying amount | Spanish government debt securities
Debt Instruments
Total financial assets	50,488		59,186	45,696
Gross carrying amount | Foreign government debt securities
Debt Instruments
Total financial assets	99,959		99,424	103,070
Gross carrying amount | Debt securities issued by financial institutions
Debt Instruments
Total financial assets	10,574		12,155	16,874
Gross carrying amount | Other fixed income debt securities
Debt Instruments
Total financial assets	29,868		28,299	25,397
Accumulated impairment | Debt instruments
Debt Instruments
Total financial assets	(635)	€ (704)	€ (730)	€ (498)	€ (291)
Accumulated impairment | Debt instruments | Next 12 months | Financial instruments not credit-impaired [member]
Debt Instruments
Total financial assets	(30)
Accumulated impairment | Debt instruments | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Debt Instruments
Total financial assets	(9)
Accumulated impairment | Debt instruments | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Debt Instruments
Total financial assets	€ (596)

Debt Instruments - Breakdown by

Debt Instruments - Breakdown by origin of issuer (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt instruments
Debt Instruments
Financial assets	€ 191,124	€ 199,351	€ 191,312
Financial assets (as a percent)	100.00%	100.00%	100.00%
Private fixed income
Debt Instruments
Financial assets	€ 40,677	€ 40,741	€ 42,546
Public fixed income
Debt Instruments
Financial assets	150,447	158,610	148,766
SPAIN | Debt instruments
Debt Instruments
Financial assets	€ 55,236	€ 64,458	€ 51,849
Financial assets (as a percent)	28.90%	32.33%	27.10%
SPAIN | Private fixed income
Debt Instruments
Financial assets	€ 4,748	€ 5,272	€ 6,153
SPAIN | Public fixed income
Debt Instruments
Financial assets	50,488	59,186	45,696
UK | Debt instruments
Debt Instruments
Financial assets	€ 15,127	€ 15,056	€ 15,441
Financial assets (as a percent)	7.91%	7.55%	8.07%
UK | Private fixed income
Debt Instruments
Financial assets	€ 5,615	€ 4,339	€ 3,531
UK | Public fixed income
Debt Instruments
Financial assets	9,512	10,717	11,910
PORTUGAL | Debt instruments
Debt Instruments
Financial assets	€ 10,606	€ 11,864	€ 11,757
Financial assets (as a percent)	5.55%	5.95%	6.15%
PORTUGAL | Private fixed income
Debt Instruments
Financial assets	€ 3,663	€ 3,972	€ 4,068
PORTUGAL | Public fixed income
Debt Instruments
Financial assets	6,943	7,892	7,689
ITALY | Debt instruments
Debt Instruments
Financial assets	€ 3,991	€ 8,458	€ 4,582
Financial assets (as a percent)	2.09%	4.24%	2.40%
ITALY | Private fixed income
Debt Instruments
Financial assets	€ 857	€ 1,287	€ 1,035
ITALY | Public fixed income
Debt Instruments
Financial assets	3,134	7,171	3,547
ITALY | Bonds sold forward
Debt Instruments
Financial assets	1,855
IRELAND | Debt instruments
Debt Instruments
Financial assets	€ 4,545	€ 3,149	€ 518
Financial assets (as a percent)	2.38%	1.58%	0.27%
IRELAND | Private fixed income
Debt Instruments
Financial assets	€ 4,543	€ 3,147	€ 518
IRELAND | Public fixed income
Debt Instruments
Financial assets	2	2
POLAND | Debt instruments
Debt Instruments
Financial assets	€ 11,172	€ 7,391	€ 6,972
Financial assets (as a percent)	5.85%	3.71%	3.64%
POLAND | Private fixed income
Debt Instruments
Financial assets	€ 683	€ 772	€ 707
POLAND | Public fixed income
Debt Instruments
Financial assets	10,489	6,619	6,265
Other European Countries | Debt instruments
Debt Instruments
Financial assets	€ 7,619	€ 8,928	€ 8,939
Financial assets (as a percent)	3.99%	4.48%	4.67%
Other European Countries | Private fixed income
Debt Instruments
Financial assets	€ 6,101	€ 7,195	€ 7,203
Other European Countries | Public fixed income
Debt Instruments
Financial assets	1,518	1,733	1,736
UNITED STATES | Debt instruments
Debt Instruments
Financial assets	€ 17,195	€ 19,656	€ 23,617
Financial assets (as a percent)	9.00%	9.86%	12.34%
UNITED STATES | Private fixed income
Debt Instruments
Financial assets	€ 6,833	€ 7,986	€ 10,559
UNITED STATES | Public fixed income
Debt Instruments
Financial assets	10,362	11,670	13,058
BRAZIL | Debt instruments
Debt Instruments
Financial assets	€ 41,868	€ 39,669	€ 45,134
Financial assets (as a percent)	21.91%	19.90%	23.59%
BRAZIL | Private fixed income
Debt Instruments
Financial assets	€ 5,285	€ 4,729	€ 5,364
BRAZIL | Public fixed income
Debt Instruments
Financial assets	36,583	34,940	39,770
MEXICO | Debt instruments
Debt Instruments
Financial assets	€ 11,845	€ 9,939	€ 11,215
Financial assets (as a percent)	6.20%	4.99%	5.86%
MEXICO | Private fixed income
Debt Instruments
Financial assets	€ 520	€ 461	€ 587
MEXICO | Public fixed income
Debt Instruments
Financial assets	11,325	9,478	10,628
CHILE | Debt instruments
Debt Instruments
Financial assets	€ 2,808	€ 4,133	€ 4,958
Financial assets (as a percent)	1.47%	2.07%	2.59%
CHILE | Private fixed income
Debt Instruments
Financial assets	€ 79	€ 62	€ 1,315
CHILE | Public fixed income
Debt Instruments
Financial assets	2,729	4,071	3,643
Other American Countries | Debt instruments
Debt Instruments
Financial assets	€ 2,486	€ 1,668	€ 2,044
Financial assets (as a percent)	1.30%	0.84%	1.07%
Other American Countries | Private fixed income
Debt Instruments
Financial assets	€ 1,111	€ 755	€ 782
Other American Countries | Public fixed income
Debt Instruments
Financial assets	1,375	913	1,262
Rest of World | Debt instruments
Debt Instruments
Financial assets	€ 6,626	€ 4,982	€ 4,286
Financial assets (as a percent)	3.47%	2.50%	2.24%
Rest of World | Private fixed income
Debt Instruments
Financial assets	€ 639	€ 764	€ 724
Rest of World | Public fixed income
Debt Instruments
Financial assets	€ 5,987	€ 4,218	€ 3,562

Debt Instruments - Breakdown _2

Debt Instruments - Breakdown by issuer rating (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt instruments
Debt Instruments
Financial assets	€ 191,124	€ 199,351	€ 191,312
Financial assets (as a percent)	100.00%	100.00%	100.00%
Private fixed income
Debt Instruments
Financial assets	€ 40,677	€ 40,741	€ 42,546
Public fixed income
Debt Instruments
Financial assets	150,447	158,610	148,766
Standard & Poors AAA Rating | Debt instruments
Debt Instruments
Financial assets	€ 19,735	€ 17,163	€ 19,924
Financial assets (as a percent)	10.33%	8.61%	10.41%
Standard & Poors AAA Rating | Private fixed income
Debt Instruments
Financial assets	€ 18,901	€ 16,239	€ 18,916
Standard & Poors AAA Rating | Public fixed income
Debt Instruments
Financial assets	834	924	1,008
Standard & Poors AA Rating | Debt instruments
Debt Instruments
Financial assets	€ 23,681	€ 26,236	€ 31,271
Financial assets (as a percent)	12.39%	13.16%	16.35%
Standard & Poors AA Rating | Private fixed income
Debt Instruments
Financial assets	€ 2,715	€ 2,714	€ 1,632
Standard & Poors AA Rating | Public fixed income
Debt Instruments
Financial assets	20,966	23,522	29,639
Standard & Poors, A Rating | Debt instruments
Debt Instruments
Financial assets	€ 72,856	€ 12,410	€ 6,213
Financial assets (as a percent)	38.12%	6.23%	3.25%
Standard & Poors, A Rating | Private fixed income
Debt Instruments
Financial assets	€ 3,464	€ 4,373	€ 2,928
Standard & Poors, A Rating | Public fixed income
Debt Instruments
Financial assets	69,392	8,037	3,285
Standard & Poors BBB Rating | Debt instruments
Debt Instruments
Financial assets	€ 26,930	€ 97,461	€ 74,534
Financial assets (as a percent)	14.09%	48.89%	38.96%
Standard & Poors BBB Rating | Private fixed income
Debt Instruments
Financial assets	€ 5,093	€ 6,449	€ 7,579
Standard & Poors BBB Rating | Public fixed income
Debt Instruments
Financial assets	21,837	91,012	66,955
Standard & Poors below BBB Rating | Debt instruments
Debt Instruments
Financial assets	€ 38,080	€ 37,502	€ 52,623
Financial assets (as a percent)	19.92%	18.81%	27.51%
Standard & Poors below BBB Rating | Private fixed income
Debt Instruments
Financial assets	€ 668	€ 2,393	€ 4,751
Standard & Poors below BBB Rating | Public fixed income
Debt Instruments
Financial assets	37,412	35,109	47,872
Unrated | Debt instruments
Debt Instruments
Financial assets	€ 9,842	€ 8,579	€ 6,747
Financial assets (as a percent)	5.15%	4.30%	3.53%
Unrated | Private fixed income
Debt Instruments
Financial assets	€ 9,836	€ 8,573	€ 6,740
Unrated | Public fixed income
Debt Instruments
Financial assets	€ 6	€ 6	€ 7

Debt Instruments - Breakdown _3

Debt Instruments - Breakdown by type of instrument (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt instruments
Debt Instruments
Financial assets	€ 191,124	€ 199,351	€ 191,312
Private fixed income
Debt Instruments
Financial assets	40,677	40,741	42,546
Private fixed income | Floating interest rate
Debt Instruments
Financial assets	13,721	13,756	11,818
Private fixed income | Fixed interest rate
Debt Instruments
Financial assets	14,209	18,535	26,341
Securitized mortgage bonds | Private fixed income
Debt Instruments
Financial assets	2,942	2,458	1,584
Other asset back bonds | Private fixed income
Debt Instruments
Financial assets	€ 9,805	€ 5,992	€ 2,803

Debt Instruments - Impairment L

Debt Instruments - Impairment Losses (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans and receivables, category
Debt Instruments
Net impairment losses charged to income for the period		€ 9,241	€ 9,557
Financial assets at amortised cost, category
Debt Instruments
Net impairment losses charged to income for the period	€ 8,986
Debt instruments
Debt Instruments
Impairment at beginning of year	(199,351)	(191,312)
Impairment at end of year	(191,124)	(199,351)	(191,312)
Debt instruments | Accumulated impairment
Debt Instruments
Impairment at beginning of year	730	498	291
Net impairment losses charged to income for the period	43	348	380
Impairment losses charged to income	138	386	423
Impairment losses reversed with a credit to income	(95)	(38)	(43)
Exchange differences and other	112	116	172
Impairment at end of year	635	730	498
Debt instruments | Accumulated impairment | Next 12 months | Financial instruments not credit-impaired [member]
Debt Instruments
Impairment at end of year	30
Debt instruments | Accumulated impairment | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Debt Instruments
Impairment at end of year	596
Debt instruments | Accumulated impairment | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Debt Instruments
Impairment at end of year	9
Debt instruments | Accumulated impairment | European Union
Debt Instruments
Impairment at beginning of year	30	40
Impairment at end of year	22	30	40
Debt instruments | Accumulated impairment | Latin America
Debt Instruments
Impairment at beginning of year	700	458
Impairment at end of year	613	700	458
Debt instruments | Loans and receivables, category
Debt Instruments
Impairment losses charged to income		348	405
Impairment losses reversed with a credit to income		(1,620)	(1,582)
Debt instruments | Loans and receivables, category | Accumulated impairment
Debt Instruments
Net impairment losses charged to income for the period		€ 348	405
Debt instruments | Financial assets at amortised cost, category
Debt Instruments
Impairment losses charged to income	43
Impairment losses reversed with a credit to income	(1,558)
Debt instruments | Financial assets at amortised cost, category | Accumulated impairment
Debt Instruments
Net impairment losses charged to income for the period	€ 43
Debt instruments | Financial assets available for sale, category | Accumulated impairment
Debt Instruments
Net impairment losses charged to income for the period			€ (25)

Equity instruments - Breakdown

Equity instruments - Breakdown - (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial instruments
Financial assets held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets available-for-sale			133,271	116,774
Equity instruments
Financial instruments
Financial assets held for trading	8,938	21,353	21,353	14,497
Non-trading financial assets mandatorily at fair value through profit or loss	3,260	2,584
Financial assets designated at fair value through profit or loss			933	546
Financial assets at fair value through other comprehensive income	2,671	€ 3,169
Financial assets available-for-sale			4,790	5,487	€ 4,849
Total financial assets	14,869		27,076	20,530
Shares of Spanish companies
Financial instruments
Total financial assets	3,448		4,199	3,098
Shares of foreign companies
Financial instruments
Total financial assets	9,107		20,448	15,342
Investment fund units and shares
Financial instruments
Total financial assets	€ 2,314		€ 2,429	€ 2,090

Equity instruments - Changes -

Equity instruments - Changes - (Details) - EUR (€) € in Millions	Jun. 21, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Balance at beginning of year		€ 133,271	€ 116,774
Valuation adjustment and other items			1,137	€ 2,192
Balance at end of year			133,271	116,774
Valuation adjustment and other items		(174)
Balance at end of year		121,091
Net gain on sale of asset classified as available-for-sale			472	861
Equity instruments
Financial instruments
Balance at beginning of year		4,790	5,487	4,849
Net additions (disposals)			(331)	(294)
Valuation adjustment and other items			(366)	932
Balance at end of year			4,790	5,487
Net additions (disposals)		(324)
Valuation adjustment and other items		(174)
Balance at end of year		€ 2,671
Net gain on sale of asset classified as available-for-sale			€ 156	397
Equity instruments | Visa Europe
Financial instruments
Net additions (disposals)				€ (263)
Net gain on sale of asset classified as available-for-sale	€ 227

Trading Derivatives (assets a_3

Trading Derivatives (assets and liabilities) and short positions - Derivatives (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Financial liabilities at fair value through profit or loss that meet definition of held for trading	70,343	107,634	107,624	108,765
Derivatives
Financial instruments
Financial liabilities at fair value through profit or loss that meet definition of held for trading	55,341	57,902	57,892	74,369
Derivatives | Interest rate risk
Financial instruments
Financial liabilities at fair value through profit or loss that meet definition of held for trading	36,487		37,582	48,124
Derivatives | Exchange rate risk
Financial instruments
Financial liabilities at fair value through profit or loss that meet definition of held for trading	17,025		18,014	23,500
Derivatives | Price risk
Financial instruments
Financial liabilities at fair value through profit or loss that meet definition of held for trading	1,673		2,040	2,402
Derivatives | Other risks
Financial instruments
Financial liabilities at fair value through profit or loss that meet definition of held for trading	156		256	343
Derivatives
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	55,939	€ 57,243	57,243	72,043
Derivatives | Interest rate risk
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	36,087		38,030	47,884
Derivatives | Exchange rate risk
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	16,912		16,320	21,087
Derivatives | Price risk
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	2,828		2,167	2,599
Derivatives | Other risks
Financial instruments
Financial assets at fair value through profit or loss, classified as held for trading	€ 112		€ 726	€ 473

Trading derivatives (assets a_4

Trading derivatives (assets and liabilities) and short positions - Short positions (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Financial liabilities held for trading	€ 70,343	€ 107,634	€ 107,624	€ 108,765
Short positions
Financial instruments
Financial liabilities held for trading	15,002	€ 20,979	20,979	23,005
Debt instruments | Short positions
Financial instruments
Borrowed securities	1,213		2,447	2,250
Short sales	12,702		16,861	19,613
Debt instruments | Short positions | Santander UK plc
Financial instruments
Borrowed securities			1,557	1,319
Debt instruments | Short positions | Banco Santander (Mexico), S.A., Institucion De Banca Multiple, Grupo Financiero Santander Mexico [Member]
Financial instruments
Borrowed securities	1,213		890	930
Short sales	26		46	1,872
Debt instruments | Short positions | Banco Santander (Brasil) S.A
Financial instruments
Short sales	7,300		8,188	9,197
Equity instruments | Short positions
Financial instruments
Borrowed securities	1,087		1,671	1,142
Equity instruments | Short positions | Santander UK plc
Financial instruments
Borrowed securities			1,500	991
Banco Santander S.A. | Debt instruments | Short positions
Financial instruments
Short sales	5,336		8,621	7,472
Banco Santander S.A. | Equity instruments | Short positions
Financial instruments
Borrowed securities	€ 987		€ 98	€ 103

Loans and advances to custome_2

Loans and advances to customers - Summary (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans And Advances To Customers Line Items
Financial assets held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets at amortised cost	946,099	909,094
Loans and receivables			903,013	840,004
Loans and advances
Loans And Advances To Customers Line Items
Financial assets held for trading	202	10,468	10,511	12,725
Non-trading financial assets mandatorily at fair value through profit or loss	1,883	611
Financial assets designated at fair value through profit or loss	54,238	38,789	30,364	27,665
Financial assets at fair value through other comprehensive income	1,601	1,107
Financial assets at amortised cost	908,403	873,322
Loans and receivables			885,470	826,767
Loans and advances - Customers
Loans And Advances To Customers Line Items
Financial assets held for trading	202		8,815	9,504
Non-trading financial assets mandatorily at fair value through profit or loss	1,881
Financial assets designated at fair value through profit or loss	21,915		20,475	17,596
Financial assets at fair value through other comprehensive income	1,601
Financial assets at amortised cost	857,322
Loans and receivables			819,625	763,370
Total financial assets	882,921		848,915	790,470
Loans and advances - Customers | Gross carrying amount
Loans And Advances To Customers Line Items
Total financial assets	906,228		872,849	814,863
Loans and advances - Customers | Accumulated impairment
Loans And Advances To Customers Line Items
Total financial assets	€ (23,307)	€ (25,936)	€ (23,934)	€ (24,393)	€ (26,517)

Loans and advances to custome_3

Loans and advances to customers - Breakdown (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans And Advances To Customers Line Items
Loans and advances to customers	€ 882,921	€ 848,915	€ 790,470
Without considering the Public Administration
Loans And Advances To Customers Line Items
Loans and advances to customers	€ 881,661
Rest of World | Public sector | Standard & Poors AAA Rating
Loans And Advances To Customers Line Items
Credit exposure percentage	13.80%
Rest of World | Public sector | Standard & Poors AA Rating
Loans And Advances To Customers Line Items
Credit exposure percentage	12.20%
Rest of World | Public sector | Standard & Poors, A Rating
Loans And Advances To Customers Line Items
Credit exposure percentage	3.20%
Rest of World | Public sector | Standard & Poors BBB Rating
Loans And Advances To Customers Line Items
Credit exposure percentage	58.30%
Rest of World | Public sector | Standard & Poors below BBB Rating
Loans And Advances To Customers Line Items
Credit exposure percentage	12.50%
Financial instruments not credit-impaired [member] | Without considering the Public Administration
Loans And Advances To Customers Line Items
Loans and advances to customers	€ 847,443
Gross carrying amount | Fixed interest rate
Loans And Advances To Customers Line Items
Financial assets	497,365	447,788	417,448
Gross carrying amount | Floating interest rate
Loans And Advances To Customers Line Items
Financial assets	408,863	425,061	397,415
Gross carrying amount | SPAIN
Loans And Advances To Customers Line Items
Financial assets	215,764	227,446	161,372
Gross carrying amount | SPAIN | Public sector | Standard & Poors BBB Rating
Loans And Advances To Customers Line Items
Loans and advances to customers	13,615	16,470	14,127
Gross carrying amount | European Union (excluding Spain)
Loans And Advances To Customers Line Items
Financial assets	411,550	390,536	379,666
Gross carrying amount | United States and Puerto Rico
Loans And Advances To Customers Line Items
Financial assets	89,325	75,777	87,318
Gross carrying amount | Other OECD countries
Loans And Advances To Customers Line Items
Financial assets	82,607	74,463	74,157
Gross carrying amount | Latin America (non-OECD)
Loans And Advances To Customers Line Items
Financial assets	87,406	88,302	93,207
Gross carrying amount | Rest of World
Loans And Advances To Customers Line Items
Financial assets	19,576	16,325	19,143
Gross carrying amount | Rest of World | Public sector
Loans And Advances To Customers Line Items
Loans and advances to customers	10,952	18,577	16,483
Gross carrying amount | Loans and advances - Customers
Loans And Advances To Customers Line Items
Financial assets	906,228	872,849	814,863
Gross carrying amount | Commercial credit
Loans And Advances To Customers Line Items
Financial assets	33,301	29,287	23,894
Gross carrying amount | Secured loans
Loans And Advances To Customers Line Items
Financial assets	478,068	473,936	454,677
Gross carrying amount | Reverse repurchase agreements
Loans And Advances To Customers Line Items
Financial assets	32,310	18,864	16,609
Gross carrying amount | Other term loans
Loans And Advances To Customers Line Items
Financial assets	265,696	257,441	232,288
Gross carrying amount | Finance lease loans
Loans And Advances To Customers Line Items
Financial assets	30,758	28,511	25,357
Gross carrying amount | Receivable on demand
Loans And Advances To Customers Line Items
Financial assets	8,794	6,721	8,102
Gross carrying amount | Credit cards receivables
Loans And Advances To Customers Line Items
Financial assets	23,083	21,809	21,363
Gross carrying amount | Impaired Assets Financial Instrument Type [Member]
Loans And Advances To Customers Line Items
Financial assets	€ 34,218	€ 36,280	€ 32,573

Loans and advances to custome_4

Loans and advances to customers - Loans to customers, net of impairment losses (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	€ 865,484
Advances to customers	17,437
Loans and advances to customers	882,921	€ 848,915	€ 790,470
Refinanced and restructured transactions	30,527
Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	109,439
Refinanced and restructured transactions	3,328
More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	125,830
Refinanced and restructured transactions	3,422
More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	121,061
Refinanced and restructured transactions	3,210
More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	121,172
Refinanced and restructured transactions	3,541
More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	61,094
Refinanced and restructured transactions	10,748
Public sector
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	22,659
Public sector | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	114
Public sector | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	86
Public sector | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	125
Public sector | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	699
Public sector | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	155
Other financial institutions (Financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	53,155
Other financial institutions (Financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	684
Other financial institutions (Financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	388
Other financial institutions (Financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	196
Other financial institutions (Financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	35,663
Other financial institutions (Financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	295
Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	301,975
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	24,752
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	21,090
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	17,244
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	38,514
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	26,893
Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	487,695
Households - other | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	83,889
Households - other | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	104,266
Households - other | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	103,496
Households - other | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	46,296
Households - other | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	33,751
With property collateral
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	390,817
Refinanced and restructured transactions	14,032
With property collateral | Public sector
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	279
With property collateral | Other financial institutions (Financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	864
With property collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	68,555
With property collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	321,119
Without collateral
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	326,888
Refinanced and restructured transactions	6,278
Without collateral | Public sector
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	21,480
Without collateral | Other financial institutions (Financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	15,929
Without collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	173,482
Without collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	115,997
With other collateral
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	147,779
Refinanced and restructured transactions	10,217
With other collateral | Public sector
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	900
With other collateral | Other financial institutions (Financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	36,362
With other collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	59,938
With other collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	50,579
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	24,641
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	8,300
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	6,224
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	4,208
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	2,126
Construction and property development | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,899
Construction and property development | With property collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	20,855
Construction and property development | Without collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,884
Construction and property development | With other collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,902
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	3,248
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	138
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	306
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	157
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	368
Civil Engineering Construction Loans Member | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	476
Civil Engineering Construction Loans Member | With property collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	525
Civil Engineering Construction Loans Member | Without collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,803
Civil Engineering Construction Loans Member | With other collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	920
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	156,666
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	5,766
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	6,671
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	6,657
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	19,022
Large companies | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	14,527
Large companies | With property collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	18,949
Large companies | Without collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	104,023
Large companies | With other collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	33,694
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	117,420
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	10,548
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	7,889
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	6,222
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	16,998
SMEs and individual entrepreneurs | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	9,991
SMEs and individual entrepreneurs | With property collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	28,226
SMEs and individual entrepreneurs | Without collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	65,772
SMEs and individual entrepreneurs | With other collateral | Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	23,422
Residential loans | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	314,017
Residential loans | Households - other | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	77,643
Residential loans | Households - other | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	97,815
Residential loans | Households - other | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	98,240
Residential loans | Households - other | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	32,361
Residential loans | Households - other | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	6,276
Residential loans | With property collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	311,513
Residential loans | Without collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,682
Residential loans | With other collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	822
Consumer loans | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	156,116
Consumer loans | Households - other | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	3,406
Consumer loans | Households - other | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	4,709
Consumer loans | Households - other | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	3,225
Consumer loans | Households - other | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	8,766
Consumer loans | Households - other | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	26,200
Consumer loans | With property collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	2,387
Consumer loans | Without collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	109,810
Consumer loans | With other collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	43,919
Other purposes | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	17,562
Other purposes | Households - other | Less than or equal to 40%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	2,840
Other purposes | Households - other | More than 40% and less than or equal to 60%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,742
Other purposes | Households - other | More than 60% and less than or equal to 80%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	2,031
Other purposes | Households - other | More than 80% and less than or equal to 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	5,169
Other purposes | Households - other | More than 100%
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	1,275
Other purposes | With property collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	7,219
Other purposes | Without collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	4,505
Other purposes | With other collateral | Households - other
Loans And Advances To Customers Line Items
Loans to customers, net of impairment losses	€ 5,838

Loans and advances to custome_5

Loans and advances to customers - Movement in gross exposure by impairment stage (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt instruments
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	€ (199,351)	€ (191,312)
Impairment at end of year	(191,124)	(199,351)	€ (191,312)
Debt instruments | Accumulated impairment
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	730	498	291
Exchange differences and other	(112)	(116)	(172)
Impairment at end of year	635	730	498
Debt instruments | Accumulated impairment | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at end of year	596
Debt instruments | Accumulated impairment | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at end of year	30
Debt instruments | Accumulated impairment | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at end of year	9
Loans and advances - Central banks
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	(26,278)	(27,973)
Impairment at end of year	(24,827)	(26,278)	(27,973)
Loans and advances - Credit institutions
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	(51,152)	(48,714)
Impairment at end of year	(58,579)	(51,152)	(48,714)
Loans and advances - Customers
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	(848,915)	(790,470)
Impairment at end of year	(882,921)	(848,915)	(790,470)
Loans and advances - Customers | Financial instruments credit-impaired
Disclosure of financial assets that are either past due or impaired [line items]
Decrease through write-off, financial assets	12,673	13,522	12,758
Exchange differences and other	387	798	(1,144)
Loans and advances - Customers | Accumulated impairment
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	23,934	24,393	26,517
Exchange differences and other	(457)	2,550	36
Impairment at end of year	23,307	23,934	24,393
Loans and advances - Customers | Accumulated impairment | Financial instruments credit-impaired
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	16,207	15,331
Impairment at end of year	14,906	16,207	15,331
Loans and advances - Customers | Accumulated impairment | Financial instruments not credit-impaired [member]
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	7,727	9,062
Impairment at end of year	8,401	7,727	€ 9,062
Loans and advances - Customers | Financial Assets At Fair Value Through Other Comprehensive Income And Financial Assets At Amortised Cost [Member] | Accumulated impairment
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	842,435
Net changes in financial assets	72,465
Decrease through write-off, financial assets	(12,673)
Exchange differences and other	(20,754)
Impairment at end of year	881,473	842,435
Loans and advances - Customers | Financial Assets At Fair Value Through Other Comprehensive Income And Financial Assets At Amortised Cost [Member] | Accumulated impairment | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	35,477
Transfer from Stage 1 to Stage 3	3,980
Transfer from Stage 2 to Stage 3	13,998
Transfer from Stage 3 to Stage 2	(4,103)
Transfer from Stage 3 to Stage 1	(835)
Net changes in financial assets	(1,997)
Decrease through write-off, financial assets	(12,673)
Exchange differences and other	(386)
Impairment at end of year	33,461	35,477
Loans and advances - Customers | Financial Assets At Fair Value Through Other Comprehensive Income And Financial Assets At Amortised Cost [Member] | Accumulated impairment | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	746,654
Transfer from Stage 1 to Stage 2	(31,234)
Transfer from Stage 1 to Stage 3	(3,980)
Transfer from Stage 2 to Stage 1	21,795
Transfer from Stage 3 to Stage 1	835
Net changes in financial assets	79,727
Exchange differences and other	(17,968)
Impairment at end of year	795,829	746,654
Loans and advances - Customers | Financial Assets At Fair Value Through Other Comprehensive Income And Financial Assets At Amortised Cost [Member] | Accumulated impairment | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	60,304
Transfer from Stage 1 to Stage 2	31,234
Transfer from Stage 2 to Stage 3	(13,998)
Transfer from Stage 2 to Stage 1	(21,795)
Transfer from Stage 3 to Stage 2	4,103
Net changes in financial assets	(5,265)
Exchange differences and other	(2,400)
Impairment at end of year	52,183	60,304
Loans and advances - Customers | Financial assets at amortised cost, category | Accumulated impairment
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	25,936
Transfer from Stage 1 to Stage 2	(1,218)
Transfer from Stage 1 to Stage 3	(89)
Transfer from Stage 2 to Stage 3	(829)
Transfer from Stage 2 to Stage 1	2,681
Transfer from Stage 3 to Stage 2	2,558
Transfer from Stage 3 to Stage 1	985
Exchange differences and other	(457)
Impairment at end of year	23,307	25,936
Loans and advances - Customers | Financial assets at amortised cost, category | Accumulated impairment | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	16,507
Transfer from Stage 1 to Stage 3	(173)
Transfer from Stage 2 to Stage 3	(1,264)
Transfer from Stage 3 to Stage 2	4,529
Transfer from Stage 3 to Stage 1	1,264
Exchange differences and other	(354)
Impairment at end of year	14,906	16,507
Loans and advances - Customers | Financial assets at amortised cost, category | Accumulated impairment | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	4,350
Transfer from Stage 1 to Stage 2	438
Transfer from Stage 1 to Stage 3	84
Transfer from Stage 2 to Stage 1	(1,173)
Transfer from Stage 3 to Stage 1	(279)
Exchange differences and other	(66)
Impairment at end of year	3,658	4,350
Loans and advances - Customers | Financial assets at amortised cost, category | Accumulated impairment | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of financial assets that are either past due or impaired [line items]
Impairment at beginning of year	5,079
Transfer from Stage 1 to Stage 2	(1,656)
Transfer from Stage 2 to Stage 3	435
Transfer from Stage 2 to Stage 1	3,854
Transfer from Stage 3 to Stage 2	(1,971)
Exchange differences and other	(37)
Impairment at end of year	€ 4,743	€ 5,079

Loans and advances to custome_6

Loans and advances to customers - Movement in loss provision (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	€ (199,351)	€ (191,312)
Impairment at end of year	(191,124)	(199,351)	€ (191,312)
Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	(848,915)	(790,470)
Impairment at end of year	(882,921)	(848,915)	(790,470)
Accumulated impairment | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	730	498	291
Net impairment losses charged to income for the period	43	348	380
Impairment loss recognized in profit or loss	138	386	423
Reversal of impairment loss recognized in profit or loss	95	38	43
Exchange differences and other	(112)	(116)	(172)
Impairment at end of year	635	730	498
Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	23,934	24,393	26,517
Net impairment losses charged to income for the period	10,501	10,513	10,734
Impairment loss recognized in profit or loss	17,850	19,006	17,081
Reversal of impairment loss recognized in profit or loss	7,349	8,493	6,347
Change of perimeter			(136)
Write-off of impaired balances against recorded impairment allowance	(12,673)	(13,522)	(12,758)
Exchange differences and other	(457)	2,550	36
Impairment at end of year	23,307	23,934	24,393
Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance of financial instruments
Net impairment losses charged to income for the period	8,986
Financial assets at amortised cost, category | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment loss recognized in profit or loss	43
Reversal of impairment loss recognized in profit or loss	1,558
Financial assets at amortised cost, category | Accumulated impairment | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Net impairment losses charged to income for the period	43
Financial assets at amortised cost, category | Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	25,936
Write-off of impaired balances against recorded impairment allowance	(12,673)
Exchange differences and other	(457)
Impairment at end of year	23,307	25,936
Loans and receivables, category
Disclosure of reconciliation of changes in loss allowance of financial instruments
Net impairment losses charged to income for the period		9,241	9,557
Loans and receivables, category | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment loss recognized in profit or loss		348	405
Reversal of impairment loss recognized in profit or loss		1,620	1,582
Loans and receivables, category | Accumulated impairment | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Net impairment losses charged to income for the period		348	405
Expected credit losses collectively assessed [member] | Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	18,623	18,296
Impairment at end of year	18,402	18,623	18,296
Expected credit losses individually assessed [member] | Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	5,311	6,097
Impairment at end of year	4,905	5,311	6,097
Financial instruments credit-impaired | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Exchange differences and other	387	798	(1,144)
Financial instruments credit-impaired | Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	16,207	15,331
Impairment at end of year	14,906	16,207	15,331
Financial instruments not credit-impaired [member] | Accumulated impairment | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	7,727	9,062
Impairment at end of year	€ 8,401	€ 7,727	€ 9,062

Loans and advances to custome_7

Loans and advances to customers - Movement in loss provision by impairment stage (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in loss allowance of financial instruments
Loans and advances to customers combining those at amortised cost and those at fair value through other comprehensive income	€ 757
Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Loans and advances to customers combining those at amortised cost and those at fair value through other comprehensive income	803
Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	(199,351)	€ (191,312)
Impairment at end of year	(191,124)	(199,351)	€ (191,312)
Debt instruments | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	730	498	291
Exchange differences and other	(112)	(116)	(172)
Impairment at end of year	635	730	498
Debt instruments | Financial instruments credit-impaired | Lifetime Expected Credit Losses | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at end of year	596
Debt instruments | Financial instruments not credit-impaired [member] | Next 12 months | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at end of year	30
Debt instruments | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at end of year	9
Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	(848,915)	(790,470)
Impairment at end of year	(882,921)	(848,915)	(790,470)
Loans and advances - Customers | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	23,934	24,393	26,517
Write-off of impaired balances against recorded impairment allowance	(12,673)	(13,522)	(12,758)
Exchange differences and other	(457)	2,550	36
Impairment at end of year	23,307	23,934	24,393
Loans and advances - Customers | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance of financial instruments
Exchange differences and other	387	798	(1,144)
Loans and advances - Customers | Financial instruments credit-impaired | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	16,207	15,331
Impairment at end of year	14,906	16,207	15,331
Loans and advances - Customers | Financial instruments not credit-impaired [member] | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	7,727	9,062
Impairment at end of year	8,401	7,727	€ 9,062
Financial assets at amortised cost, category | Loans and advances - Customers | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	25,936
Transfer from Stage 2 to Stage 1	2,681
Transfer from Stage 3 to Stage 1	985
Transfer from Stage 3 to Stage 2	2,558
Transfer from Stage 1 to Stage 2	(1,218)
Transfer from Stage 2 to Stage 3	(829)
Transfer from Stage 1 to Stage 3	(89)
Net changes of the exposure and modifications in the credit risk	6,413
Write-off of impaired balances against recorded impairment allowance	(12,673)
Exchange differences and other	(457)
Impairment at end of year	23,307	25,936
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments credit-impaired | Lifetime Expected Credit Losses | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	16,507
Transfer from Stage 3 to Stage 1	1,264
Transfer from Stage 3 to Stage 2	4,529
Transfer from Stage 2 to Stage 3	(1,264)
Transfer from Stage 1 to Stage 3	(173)
Net changes of the exposure and modifications in the credit risk	7,070
Write-off of impaired balances against recorded impairment allowance	(12,673)
Exchange differences and other	(354)
Impairment at end of year	14,906	16,507
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Next 12 months | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	4,350
Transfer from Stage 2 to Stage 1	(1,173)
Transfer from Stage 3 to Stage 1	(279)
Transfer from Stage 1 to Stage 2	438
Transfer from Stage 1 to Stage 3	84
Net changes of the exposure and modifications in the credit risk	304
Exchange differences and other	(66)
Impairment at end of year	3,658	4,350
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	5,079
Transfer from Stage 2 to Stage 1	3,854
Transfer from Stage 3 to Stage 2	(1,971)
Transfer from Stage 1 to Stage 2	(1,656)
Transfer from Stage 2 to Stage 3	435
Net changes of the exposure and modifications in the credit risk	(961)
Exchange differences and other	(37)
Impairment at end of year	€ 4,743	€ 5,079

Loans and advances to custome_8

Loans and advances to customers - Impaired assets (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Written-off assets			€ 40,473
Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Written-off assets	€ 47,751
Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Written-off assets		€ 43,508	40,473
Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets at beginning of period	848,915	790,470
Financial assets at end of period	882,921	848,915	790,470
Loans and advances - Customers | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Additions	10,821	8,409	7,393
Written-off assets	(12,673)	(13,522)	(12,758)
Changes in the scope of consolidation	177	9,618	661
Exchange differences and other	(387)	(798)	1,144
Gross carrying amount | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets at beginning of period	872,849	814,863
Financial assets at end of period	906,228	872,849	814,863
Gross carrying amount | Loans and advances - Customers | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Financial assets at beginning of period	36,280	32,573	36,133
Financial assets at end of period	€ 34,218	€ 36,280	€ 32,573

Loans and advances to custome_9

Loans and advances to customers - By geographical location and age (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ 882,921	€ 848,915	€ 790,470
Gross carrying amount | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	34,218
Gross carrying amount | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		36,280	32,573
Gross carrying amount | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	13,152
Gross carrying amount | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		11,724	11,141
Gross carrying amount | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	4,167
Gross carrying amount | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		4,977	4,664
Gross carrying amount | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,083
Gross carrying amount | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		2,521	2,551
Gross carrying amount | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,929
Gross carrying amount | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		2,128	2,175
Gross carrying amount | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	12,887
Gross carrying amount | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		14,930	12,042
Gross carrying amount | SPAIN | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	16,382
Gross carrying amount | SPAIN | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		18,200	13,347
Gross carrying amount | SPAIN | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	5,671
Gross carrying amount | SPAIN | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		6,012	4,845
Gross carrying amount | SPAIN | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	780
Gross carrying amount | SPAIN | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		938	508
Gross carrying amount | SPAIN | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	551
Gross carrying amount | SPAIN | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		793	360
Gross carrying amount | SPAIN | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	656
Gross carrying amount | SPAIN | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		814	625
Gross carrying amount | SPAIN | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	8,724
Gross carrying amount | SPAIN | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		9,643	7,009
Gross carrying amount | European Union (excluding Spain) | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	7,911
Gross carrying amount | European Union (excluding Spain) | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		8,747	9,224
Gross carrying amount | European Union (excluding Spain) | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,940
Gross carrying amount | European Union (excluding Spain) | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		2,023	2,648
Gross carrying amount | European Union (excluding Spain) | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,213
Gross carrying amount | European Union (excluding Spain) | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		1,526	1,783
Gross carrying amount | European Union (excluding Spain) | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	577
Gross carrying amount | European Union (excluding Spain) | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		811	877
Gross carrying amount | European Union (excluding Spain) | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	519
Gross carrying amount | European Union (excluding Spain) | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		558	654
Gross carrying amount | European Union (excluding Spain) | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,662
Gross carrying amount | European Union (excluding Spain) | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		3,829	3,262
Gross carrying amount | United States and Puerto Rico | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,676
Gross carrying amount | United States and Puerto Rico | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		2,146	1,979
Gross carrying amount | United States and Puerto Rico | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,906
Gross carrying amount | United States and Puerto Rico | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		1,221	805
Gross carrying amount | United States and Puerto Rico | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	531
Gross carrying amount | United States and Puerto Rico | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		641	833
Gross carrying amount | United States and Puerto Rico | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	30
Gross carrying amount | United States and Puerto Rico | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		42	38
Gross carrying amount | United States and Puerto Rico | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	31
Gross carrying amount | United States and Puerto Rico | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		50	61
Gross carrying amount | United States and Puerto Rico | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	178
Gross carrying amount | United States and Puerto Rico | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		192	242
Gross carrying amount | Other OECD countries | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,737
Gross carrying amount | Other OECD countries | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		2,758	2,859
Gross carrying amount | Other OECD countries | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,414
Gross carrying amount | Other OECD countries | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		1,523	1,601
Gross carrying amount | Other OECD countries | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	498
Gross carrying amount | Other OECD countries | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		563	481
Gross carrying amount | Other OECD countries | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	143
Gross carrying amount | Other OECD countries | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		166	145
Gross carrying amount | Other OECD countries | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	162
Gross carrying amount | Other OECD countries | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		128	158
Gross carrying amount | Other OECD countries | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	520
Gross carrying amount | Other OECD countries | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		378	474
Gross carrying amount | Latin America (non-OECD) | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	4,512
Gross carrying amount | Latin America (non-OECD) | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		4,429	5,164
Gross carrying amount | Latin America (non-OECD) | With no past due balances or less than 90 days past due | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,221
Gross carrying amount | Latin America (non-OECD) | With no past due balances or less than 90 days past due | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		945	1,242
Gross carrying amount | Latin America (non-OECD) | 90 to 180 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	1,145
Gross carrying amount | Latin America (non-OECD) | 90 to 180 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		1,309	1,059
Gross carrying amount | Latin America (non-OECD) | 180 to 270 days | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	782
Gross carrying amount | Latin America (non-OECD) | 180 to 270 days | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		709	1,131
Gross carrying amount | Latin America (non-OECD) | 270 days to 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	561
Gross carrying amount | Latin America (non-OECD) | 270 days to 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		578	677
Gross carrying amount | Latin America (non-OECD) | More than 1 year | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ 803
Gross carrying amount | Latin America (non-OECD) | More than 1 year | Loans and receivables, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers		€ 888	€ 1,055

Loans and advances to custom_10

Loans and advances to customers - Assets, allowances and collateral (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ 882,921	€ 848,915	€ 790,470
Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Estimated collateral value	13,566
With property collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Estimated collateral value	11,653
With other collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Estimated collateral value	1,913
Gross carrying amount | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	34,218
Gross carrying amount | Without collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	13,250
Gross carrying amount | With property collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	16,228
Gross carrying amount | With other collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	4,740
Accumulated impairment | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	(14,906)
Accumulated impairment | Without collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	(8,636)
Accumulated impairment | With property collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	(4,408)
Accumulated impairment | With other collateral | Financial assets at amortised cost, category | Financial instruments credit-impaired
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ (1,862)

Loans and advances to custom_11

Loans and advances to customers - Standard loans past due 90 days or less (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ 882,921	€ 848,915	€ 790,470
Less than 1 month | Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	2,023
1 to 2 months | Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	629
2 to 3 months | Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	617
Public sector | Less than 1 month | Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Loans and advances to customers	€ 5

Loans and advances to custom_12

Loans and advances to customers - Securitisation (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Derecognized securitized loans	€ 47	€ 241	€ 477
Securitized loans retained on the balance sheet	88,767	91,208	100,675
Securitizations	88,814	91,449	101,152
UK
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Securitized loans retained on the balance sheet	13,519	15,694	20,969
Santander Bank, National Association
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Original assets before transfer	35	113	324
Mortgage assets
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Derecognized securitized loans	47	241	477
Securitized loans retained on the balance sheet	33,900	36,844	44,311
Mortgage assets | Santander Bank, National Association
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Derecognized securitized loans	35
Other securitized assets
Disclosure of transferred financial assets that are not derecognized in their entirety [line items]
Securitized loans retained on the balance sheet	€ 54,867	€ 54,364	€ 56,364

Trading derivatives (Details)

Trading derivatives (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about hedging instruments [line items]
Notional amount	5,791,733	4,714,509	4,761,206
Derivative Fair Value	€ 598	€ (649)	€ (2,326)
Forward rate agreements
Disclosure of detailed information about hedging instruments [line items]
Notional amount	308,340	190,553	370,244
Derivative Fair Value	€ (1)	€ (15)	€ (64)
Interest rate swaps
Disclosure of detailed information about hedging instruments [line items]
Notional amount	4,197,246	3,312,025	3,092,360
Derivative Fair Value	€ 115	€ 974	€ 804
Options, futures and other derivative
Disclosure of detailed information about hedging instruments [line items]
Notional amount	543,138	540,424	565,635
Derivative Fair Value	€ (514)	€ (511)	€ (980)
Credit default swap
Disclosure of detailed information about hedging instruments [line items]
Notional amount	18,889	25,136	38,827
Derivative Fair Value	€ 33	€ 68	€ 37
Foreign currency purchases and sales
Disclosure of detailed information about hedging instruments [line items]
Notional amount	275,449	236,805	259,336
Derivative Fair Value	€ 301	€ (29)	€ 1,102
Foreign currency options
Disclosure of detailed information about hedging instruments [line items]
Notional amount	54,215	43,488	36,965
Derivative Fair Value	€ 2	€ (37)	€ 112
Currency swaps
Disclosure of detailed information about hedging instruments [line items]
Notional amount	334,524	295,753	321,316
Derivative Fair Value	€ (416)	€ (1,628)	€ (3,627)
Securities and commodities derivatives and other
Disclosure of detailed information about hedging instruments [line items]
Notional amount	59,932	70,325	76,523
Derivative Fair Value	€ 1,078	€ 529	€ 290

Non-current assets (Details)

Non-current assets (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	€ 26,157	€ 22,974	€ 23,286
Other assets	9,348	9,766	8,447
Total non-current assets held for sale	5,426	15,280	5,772
Non-current assets held for sale [member]
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	5,424	11,661	5,743
Other tangible assets held for sale	90	95	103
Other assets	2	3,619	29
Total non-current assets held for sale	5,426	15,280	5,772
Non-current assets held for sale [member] | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	5,334	11,566	5,640
Non-current assets held for sale [member] | SPAIN | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	€ 4,488	€ 10,533	€ 4,902

Non-current assets - Allowances

Non-current assets - Allowances and other information (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Gains Or Losses On Assets Held For Sale [Line Items]
Net charges recorded against valuation allowances	€ 259	€ 306	€ 212
Proceeds from sale of assets held for sale	9,656	1,382	1,147
Tangible assets.	26,157	22,974	23,286
Gains on disposals of non-current assets	126	577	161
Gross carrying amount
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets.	46,200	41,091	39,815	€ 39,708
Accumulated impairment
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets.	€ (916)	€ (904)	€ (952)	€ (1,280)
Non-current assets held for sale [member]
Gains Or Losses On Assets Held For Sale [Line Items]
Allowances recognized for non-current assets (as percentage)	49.00%	50.00%	51.00%
Net charges recorded against valuation allowances	€ 320	€ 347	€ 241
Recoveries	61	41	29
Tangible assets.	5,424	11,661	5,743
Gains on disposals of non-current assets	136	111	71
Non-current assets held for sale [member] | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
Net charges recorded against valuation allowances	736
Proceeds from sale of assets held for sale	1,578
Tangible assets.	5,334	€ 11,566	€ 5,640
Gains on disposals of non-current assets	124
Non-current assets held for sale [member] | Foreclosed assets | Gross carrying amount
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets.	2,190
Non-current assets held for sale [member] | Other assets Member
Gains Or Losses On Assets Held For Sale [Line Items]
Proceeds from sale of assets held for sale	117
Gains on disposals of non-current assets	€ 12

Investments - Summary of invest

Investments - Summary of investments by company (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment [Line Items]
Investments in associates accounted for using equity method	€ 6,609	€ 4,197	€ 3,242
Investments in joint ventures	979	1,987	1,594
Wizink Bank, S.A.
Investment [Line Items]
Investments in joint ventures		1,017
Union De Creditos Inmobiliarios SA EFC [Member]
Investment [Line Items]
Investments in joint ventures	202	207	177
Aegon Santander Seguros
Investment [Line Items]
Investments in joint ventures	163	186	197
SAM Investment Holdings Limited
Investment [Line Items]
Investments in joint ventures			525
Other joint venture companies
Investment [Line Items]
Investments in joint ventures	614	577	695
Project Quasar Investments 2017, S.L. [Member]
Investment [Line Items]
Investments in associates accounted for using equity method	1,701
Merlin Properties, SOCIMI, S.A.
Investment [Line Items]
Investments in associates accounted for using equity method	1,358	1,242	1,168
Metrovacesa, S.A.
Investment [Line Items]
Investments in associates accounted for using equity method	1,255
Zurich Santander Insurance America S.L.
Investment [Line Items]
Investments in associates accounted for using equity method	961	988	1,011
Testa Residencial, SOCIMI, S.A.
Investment [Line Items]
Investments in associates accounted for using equity method		651	307
Allianz Popular, S.L.
Investment [Line Items]
Investments in associates accounted for using equity method	431	438
Santander Insurance
Investment [Line Items]
Investments in associates accounted for using equity method	392	358	325
Other associated companies
Investment [Line Items]
Investments in associates accounted for using equity method	€ 511	€ 520	€ 431

Investments - Changes in invest

Investments - Changes in investments (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment [Line Items]
Balance at beginning of year	€ 6,184	€ 4,836	€ 3,251
Acquisitions (disposals) and capital increases (reductions)	(1,761)	1,893	(72)
Changes in the consolidation method (Note 3)	2,967	(582)	1,457
Effect of equity accounting	737	704	444
Dividends paid and reimbursements of share premium	(404)	(376)	(305)
Exchange differences and other changes	(101)	(291)	61
Balance at end of year	7,588	6,184	€ 4,836
Grupo Metrovacesa
Investment [Line Items]
Changes in the consolidation method (Note 3)	1,255
Wizink Bank, S.A.
Investment [Line Items]
Acquisitions (disposals) and capital increases (reductions)	(1,033)	1,017
Allianz Popular, S.L.
Investment [Line Items]
Acquisitions (disposals) and capital increases (reductions)		438
Effect of equity accounting	45	€ 15
Project Quasar Investments 2017, S.L. [Member]
Investment [Line Items]
Changes in the consolidation method (Note 3)	€ 1,701

Investments - Summary of compan

Investments - Summary of companies using the equity method (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Investment [Line Items]
Total assets	€ 1,459,271	€ 1,444,305	€ 1,339,125	€ 1,443,069
Total liabilities	(1,351,910)	(1,337,472)	(1,236,426)	€ (1,337,707)
Goodwill	25,466	25,769	26,724		€ 26,960
Total profit	9,315	8,207	7,486
Group's share of profit	737	704	444
Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	74,765	63,093	55,791
Total liabilities	(58,153)	(51,242)	(45,623)
Net assets	16,612	11,851	10,168
Total revenue	12,174	12,536	11,766
Total profit	1,867	1,699	984
Equity Investments
Investment [Line Items]
Net assets	7,588	6,184	4,836
Net assets excluding goodwill	6,157	4,194	3,381
Goodwill	1,431	1,990	1,455
Wizink Bank, S.A.
Investment [Line Items]
Goodwill		553
Zurich Santander Insurance America S.L.
Investment [Line Items]
Goodwill	526	526	526
Group's share of profit	194	241	223
Allianz Popular, S.L.
Investment [Line Items]
Goodwill	347	347
Group's share of profit	45	15
Allianz Popular, S.L. | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	3,238
Total liabilities	(3,028)
Total revenue	113
Total profit	113
Santander Insurance
Investment [Line Items]
Goodwill	205	€ 205	€ 205
Santander Insurance | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	2,276
Total liabilities	(1,899)
Total revenue	822
Total profit	€ 77

Investments - Summary of associ

Investments - Summary of associates and joint ventures (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018
Investment [Line Items]
Total assets	€ 1,459,271	€ 1,444,305	€ 1,339,125	€ 1,443,069
Total liabilities	1,351,910	1,337,472	1,236,426	€ 1,337,707
Total profit	9,315	8,207	7,486
Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	74,765	63,093	55,791
Total liabilities	58,153	51,242	45,623
Total revenue	12,174	12,536	11,766
Total profit	1,867	€ 1,699	€ 984
Aggregate Amounts For Entities Accounted For Using The Equity Method [Member] | Joint ventures [member]
Investment [Line Items]
Total assets	21,934
Total liabilities	20,324
Total revenue	4,301
Total profit	334
Aggregate Amounts For Entities Accounted For Using The Equity Method [Member] | Union De Creditos Inmobiliarios SA EFC [Member]
Investment [Line Items]
Total assets	12,105
Total liabilities	11,701
Total revenue	351
Total profit	7
Aggregate Amounts For Entities Accounted For Using The Equity Method [Member] | Aegon Santander Seguros
Investment [Line Items]
Total assets	132
Total liabilities	84
Total revenue	122
Total profit	15
Associates [member] | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	52,831
Total liabilities	37,829
Total revenue	7,873
Total profit	1,533
Inversiones ZS America [Member] | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	13,805
Total liabilities	12,915
Total revenue	4,143
Total profit	402
Allianz Popular, S.L. | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	3,238
Total liabilities	3,028
Total revenue	113
Total profit	113
Santander Insurance | Aggregate Amounts For Entities Accounted For Using The Equity Method [Member]
Investment [Line Items]
Total assets	2,276
Total liabilities	1,899
Total revenue	822
Total profit	€ 77

Insurance contracts linked to_3

Insurance contracts linked to pensions (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Insurance contracts linked to pensions
Assets arising from insurance contracts	€ 210	€ 239	€ 269
Banco Santander S.A.
Insurance contracts linked to pensions
Assets arising from insurance contracts	€ 210	€ 239	€ 269

Liabilities and assets under _3

Liabilities and assets under insurance contracts and reinsurance assets (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	€ 765	€ 1,117	€ 652
Reinsurance ceded	(324)	(341)	(331)
Total (balance payable)	441	776	321
Unearned premiums and unexpired risks
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	52	50	61
Reinsurance ceded	(47)	(41)	(46)
Total (balance payable)	5	9	15
Life insurance
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	227	483	159
Reinsurance ceded	(163)	(151)	(138)
Total (balance payable)	64	332	21
Life Insurance Unearned Premiums And Risks [Member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	140	100	76
Reinsurance ceded	(127)	(96)	(76)
Total (balance payable)	13	4
Life Insurance Mathematical Provisions [Member]
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	87	383	83
Reinsurance ceded	(36)	(55)	(62)
Total (balance payable)	51	328	21
Claims outstanding
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	397	423	358
Reinsurance ceded	(86)	(115)	(98)
Total (balance payable)	311	308	260
Bonuses and rebates
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	20	29	19
Reinsurance ceded	(9)	(11)	(8)
Total (balance payable)	11	18	11
Other technical provisions
Disclosure of net, gross and reinsurer's share for amounts arising from insurance contracts [line items]
Direct insurance and reinsurance assumed	69	132	55
Reinsurance ceded	(19)	(23)	(41)
Total (balance payable)	€ 50	€ 109	€ 14

Tangible assets (Details)

Tangible assets (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	€ 22,974	€ 23,286
Balance, at the end of the period	26,157	22,974	€ 23,286
Gross carrying amount
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	41,091	39,815	39,708
Additions / disposals (net) due to change in the scope of consolidation	(552)	1,945	(4,008)
Additions/ disposals (net)	5,952	3,126	3,079
Transfers, exchange differences and other items	(291)	(3,795)	1,036
Balance, at the end of the period	46,200	41,091	39,815
Accumulated depreciation and amortization
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(17,213)	(15,577)	(13,108)
Additions / disposals (net) due to change in the scope of consolidation	(46)		123
Additions/ disposals (net)	1,059	1,125	797
Charge for the year	(1,172)	(1,190)	(1,089)
Transfers, exchange differences and other items	(1,755)	(1,571)	(2,300)
Balance, at the end of the period	(19,127)	(17,213)	(15,577)
Accumulated impairment
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(904)	(952)	(1,280)
Impairment charge for the year	(94)	(79)	(117)
Releases	11	7	62
Additions / disposals (net) due to change in the scope of consolidation		(3)	310
Transfers, exchange differences and other items	71	123	73
Balance, at the end of the period	(916)	(904)	(952)
Property, plant and equipment for own use
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	8,279	7,860
Balance, at the end of the period	8,150	8,279	7,860
Property, plant and equipment for own use | Gross carrying amount
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	19,276	18,112	17,442
Additions / disposals (net) due to change in the scope of consolidation	34	1,740	(17)
Additions/ disposals (net)	589	781	763
Transfers, exchange differences and other items	(1,164)	(1,357)	(76)
Balance, at the end of the period	18,735	19,276	18,112
Property, plant and equipment for own use | Accumulated depreciation and amortization
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(10,920)	(10,211)	(9,448)
Additions / disposals (net) due to change in the scope of consolidation	(12)		5
Additions/ disposals (net)	629	478	311
Charge for the year	(1,159)	(1,165)	(1,079)
Transfers, exchange differences and other items	938	(22)
Balance, at the end of the period	(10,524)	(10,920)	(10,211)
Property, plant and equipment for own use | Accumulated impairment
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(77)	(41)	(45)
Impairment charge for the year	(30)	(16)	(12)
Releases	6	4	1
Additions / disposals (net) due to change in the scope of consolidation			1
Transfers, exchange differences and other items	40	(24)	14
Balance, at the end of the period	(61)	(77)	(41)
Property, plant and equipment leased out under an operating lease
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	12,371	12,910
Balance, at the end of the period	16,444	12,371	12,910
Property, plant and equipment leased out under an operating lease | Gross carrying amount
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	18,673	18,238	14,921
Additions / disposals (net) due to change in the scope of consolidation	44	205	287
Additions/ disposals (net)	5,545	2,445	2,380
Transfers, exchange differences and other items	825	(2,215)	650
Balance, at the end of the period	25,087	18,673	18,238
Property, plant and equipment leased out under an operating lease | Accumulated depreciation and amortization
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(6,104)	(5,169)	(3,376)
Additions / disposals (net) due to change in the scope of consolidation	(34)		(3)
Additions/ disposals (net)	413	639	457
Transfers, exchange differences and other items	(2,679)	(1,574)	(2,247)
Balance, at the end of the period	(8,404)	(6,104)	(5,169)
Property, plant and equipment leased out under an operating lease | Accumulated impairment
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(198)	(159)	(159)
Impairment charge for the year	(56)	(42)	(43)
Releases			1
Additions / disposals (net) due to change in the scope of consolidation		(2)
Transfers, exchange differences and other items	15	5	42
Balance, at the end of the period	(239)	(198)	(159)
Investment property [Member]
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	2,324	2,516
Balance, at the end of the period	1,563	2,324	2,516
Investment property [Member] | Gross carrying amount
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	3,142	3,465	7,345
Additions / disposals (net) due to change in the scope of consolidation	(630)		(4,278)
Additions/ disposals (net)	(182)	(100)	(64)
Transfers, exchange differences and other items	48	(223)	462
Balance, at the end of the period	2,378	3,142	3,465
Investment property [Member] | Accumulated depreciation and amortization
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(189)	(197)	(284)
Additions / disposals (net) due to change in the scope of consolidation			121
Additions/ disposals (net)	17	8	29
Charge for the year	(13)	(25)	(10)
Transfers, exchange differences and other items	(14)	25	(53)
Balance, at the end of the period	(199)	(189)	(197)
Investment property [Member] | Accumulated impairment
Changes in property, plant and equipment [abstract]
Balance, at the beginning of the period	(629)	(752)	(1,076)
Impairment charge for the year	(8)	(21)	(62)
Releases	5	3	60
Additions / disposals (net) due to change in the scope of consolidation		(1)	309
Transfers, exchange differences and other items	16	142	17
Balance, at the end of the period	€ (616)	€ (629)	€ (752)

Tangible assets - Property, pla

Tangible assets - Property, plant and equipment for own use (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, plant and equipment for own use
Carrying amount	€ 24,594	€ 20,650	€ 20,770
Property, plant and equipment for own use
Property, plant and equipment for own use
Carrying amount	8,150	8,279	7,860
Property, plant and equipment for own use | Abroad
Property, plant and equipment for own use
Carrying amount	5,390	5,455	5,906
Property, plant and equipment for own use | Gross carrying amount
Property, plant and equipment for own use
Carrying amount	18,735	19,276	18,112
Property, plant and equipment for own use | Accumulated depreciation and amortization
Property, plant and equipment for own use
Carrying amount	(10,524)	(10,920)	(10,211)
Property, plant and equipment for own use | Accumulated impairment
Property, plant and equipment for own use
Carrying amount	(61)	(77)	(41)
Land and buildings
Property, plant and equipment for own use
Carrying amount	4,010	3,801	3,705
Land and buildings | Gross carrying amount
Property, plant and equipment for own use
Carrying amount	6,127	5,892	5,713
Land and buildings | Accumulated depreciation and amortization
Property, plant and equipment for own use
Carrying amount	(2,056)	(2,014)	(1,967)
Land and buildings | Accumulated impairment
Property, plant and equipment for own use
Carrying amount	(61)	(77)	(41)
IT equipment and fixtures
Property, plant and equipment for own use
Carrying amount	1,150	1,186	1,064
IT equipment and fixtures | Gross carrying amount
Property, plant and equipment for own use
Carrying amount	5,605	5,608	5,225
IT equipment and fixtures | Accumulated depreciation and amortization
Property, plant and equipment for own use
Carrying amount	(4,455)	(4,422)	(4,161)
Furniture and vehicles
Property, plant and equipment for own use
Carrying amount	2,740	2,822	2,940
Furniture and vehicles | Gross carrying amount
Property, plant and equipment for own use
Carrying amount	6,686	7,213	6,963
Furniture and vehicles | Accumulated depreciation and amortization
Property, plant and equipment for own use
Carrying amount	(3,946)	(4,391)	(4,023)
Construction in progress
Property, plant and equipment for own use
Carrying amount	250	470	151
Construction in progress | Gross carrying amount
Property, plant and equipment for own use
Carrying amount	317	563	211
Construction in progress | Accumulated depreciation and amortization
Property, plant and equipment for own use
Carrying amount	€ (67)	€ (93)	€ (60)

Tangible Assets - Investment pr

Tangible Assets - Investment property (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investment property
Fair value of investment property	€ 1,825	€ 2,435	€ 2,583
Gross unrealized gains	€ 262	€ 128	€ 67

Intangible assets - Goodwill -

Intangible assets - Goodwill - Summary (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash-generating units information
Goodwill	€ 25,466	€ 25,769	€ 26,724	€ 26,960
Grupo Santander UK
Cash-generating units information
Goodwill	8,307	8,375	8,679
Banco Santander (Brasil) S.A
Cash-generating units information
Goodwill	4,459	4,988	5,769
Santander Bank Polska SA [Member]
Cash-generating units information
Goodwill	2,402	2,473	2,342
Santander Consumer USA Holdings Inc.
Cash-generating units information
Goodwill	2,102	2,007	3,182
Santander Bank, National Association
Cash-generating units information
Goodwill	1,793	1,712	1,948
Santander Consumer Bank AG
Cash-generating units information
Goodwill	1,217	1,217	1,217
Santander Asset Management [Member]
Cash-generating units information
Goodwill	1,173	1,173
Banco Santander Totta SA
Cash-generating units information
Goodwill	1,040	1,040	1,040
Santander Espana [Member]
Cash-generating units information
Goodwill	1,023	648	371
Banco Santander - Chile
Cash-generating units information
Goodwill	627	676	704
Santander Consumer Bank A.S.
Cash-generating units information
Goodwill	502	518	537
Banco Santander S.A. (Mexico)
Cash-generating units information
Goodwill	434	413	449
Other cash-generating companies
Cash-generating units information
Goodwill	€ 387	€ 529	€ 486

Intangible assets - Goodwill _2

Intangible assets - Goodwill - Changes (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in goodwill
Goodwill at beginning of period	€ 25,769	€ 26,724	€ 26,960
Additions	383	1,644
Impairment losses		(899)	(50)
Disposals or changes in scope of consolidation	(130)		(2)
Exchange differences and other items	(556)	(1,700)	(184)
Goodwill at end of period	25,466	25,769	€ 26,724
Santander Asset Management [Member]
Changes in goodwill
Additions		1,173
Santander Espana [Member]
Changes in goodwill
Additions	€ 375	248
Santander Consumer USA Holdings Inc.
Changes in goodwill
Impairment losses		€ (799)

Intangible assets - Goodwill _3

Intangible assets - Goodwill - Assumptions (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash-generating units information
Percentage increase in designated risk component	0.50%
Percentage decrease in designated risk component	0.50%
Impairment loss recognised in profit or loss, goodwill		€ 899	€ 50
Impairment loss, net of tax, goodwill	€ 0	899	€ 50
Grupo Santander UK
Cash-generating units information
Projected period	5 years
Discount rate (as a percent)	8.40%
Nominal perpetual growth rate (as a percent)	2.50%
Santander Consumer USA Holdings Inc.
Cash-generating units information
Projected period	3 years
Discount rate (as a percent)	11.10%
Nominal perpetual growth rate (as a percent)	1.50%
Impairment loss recognised in profit or loss, goodwill	€ 799	€ 899
Santander Bank, National Association
Cash-generating units information
Projected period	3 years
Discount rate (as a percent)	10.60%
Nominal perpetual growth rate (as a percent)	3.80%
Santander Consumer Germany
Cash-generating units information
Projected period	5 years
Discount rate (as a percent)	8.50%
Nominal perpetual growth rate (as a percent)	2.50%
Santander Asset Management [Member]
Cash-generating units information
Projected period	5 years
Discount rate (as a percent)	9.60%
Nominal perpetual growth rate (as a percent)	2.50%
Santander Portugal [Member]
Cash-generating units information
Discount rate (as a percent)	9.60%
Nominal perpetual growth rate (as a percent)	2.00%
Santander Consumer Bank (Nordics)
Cash-generating units information
Projected period	5 years
Discount rate (as a percent)	9.20%
Nominal perpetual growth rate (as a percent)	2.50%
Banco Santander Totta SA
Cash-generating units information
Projected period	5 years

Intangible assets - Other int_3

Intangible assets - Other intangible assets (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible assets - Other intangible assets
Intangible assets, beginning balance	€ 2,914	€ 2,697	€ 2,470
Net additions and disposals	1,469	1,538	1,768
Change in scope of consolidation	12	414	(124)
Amortization and impairment	(1,370)	(1,577)	(1,286)
Exchange differences and other	69	(158)	(131)
Intangible assets, end balance	3,094	2,914	2,697
Impairment losses	117	174	11
Accumulated depreciation and amortization
Intangible assets - Other intangible assets
Intangible assets, beginning balance	(5,386)	(4,848)	(3,873)
Change in scope of consolidation	(1)	(64)
Amortization and impairment	(1,253)	(1,403)	(1,275)
Application of amortization and impairment	1,035	694	716
Exchange differences and other	173	235	(416)
Intangible assets, end balance	(5,432)	(5,386)	(4,848)
Accumulated impairment
Intangible assets - Other intangible assets
Intangible assets, beginning balance	(240)	(297)	(423)
Amortization and impairment	(117)	(174)	(11)
Addition	(118)
Liberation	1
Application of amortization and impairment	117	111	185
Exchange differences and other	86	120	(48)
Intangible assets, end balance	(154)	(240)	(297)
Brand names | Gross carrying amount
Intangible assets - Other intangible assets
Intangible assets, beginning balance	35	39	49
Net additions and disposals			1
Application of amortization and impairment			(11)
Exchange differences and other	1	(4)
Intangible assets, end balance	€ 36	€ 35	€ 39
IT developments | Minimum
Intangible assets - Other intangible assets
Estimated useful life	3 years	3 years	3 years
IT developments | Maximum
Intangible assets - Other intangible assets
Estimated useful life	7 years	7 years	7 years
IT developments | Gross carrying amount
Intangible assets - Other intangible assets
Intangible assets, beginning balance	€ 6,945	€ 6,558	€ 5,411
Net additions and disposals	1,468	1,470	1,726
Change in scope of consolidation	1	42
Application of amortization and impairment	(1,102)	(679)	(890)
Exchange differences and other	(178)	(446)	311
Intangible assets, end balance	7,134	6,945	6,558
IT developments | Accumulated depreciation and amortization
Intangible assets - Other intangible assets
Intangible assets, beginning balance	(4,721)	(4,240)	(3,353)
Change in scope of consolidation	(1)	(14)
Amortization and impairment	(1,153)	(1,310)	(1,168)
Application of amortization and impairment	985	627	716
Exchange differences and other	147	216	(435)
Intangible assets, end balance	(4,743)	(4,721)	(4,240)
Other intangibles | Gross carrying amount
Intangible assets - Other intangible assets
Intangible assets, beginning balance	1,560	1,245	1,306
Net additions and disposals	1	68	41
Change in scope of consolidation	12	436	(124)
Application of amortization and impairment	(50)	(126)
Exchange differences and other	(13)	(63)	22
Intangible assets, end balance	1,510	1,560	1,245
Other intangibles | Accumulated depreciation and amortization
Intangible assets - Other intangible assets
Intangible assets, beginning balance	(665)	(608)	(520)
Change in scope of consolidation		(50)
Amortization and impairment	(100)	(93)	(107)
Application of amortization and impairment	50	67
Exchange differences and other	26	19	19
Intangible assets, end balance	€ (689)	€ (665)	€ (608)

Other Assets (Details)

Other Assets (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Assets Abstract
Transactions in transit	€ 143	€ 206	€ 431
Net pension plan assets (note 25)	1,015	604	521
Prepayments and accrued income	3,089	2,326	2,232
Other	4,744	4,427	3,878
Other assets, total	€ 8,991	€ 7,563	€ 7,062

Deposits from central banks a_3

Deposits from central banks and credit institutions (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Deposits [Line Items]
Financial liabilities held for trading	€ 70,343	€ 107,634	€ 107,624	€ 108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Financial liabilities at amortized cost	1,171,630	1,126,069	1,126,069	1,044,240
Total financial liabilities	187,909		190,314	149,398
Deposits from central banks at amortised cost due to participation in the refinancing operations program	55,382
Deposits
Deposits [Line Items]
Financial liabilities held for trading		28,753	28,753	11,391
Financial liabilities designated at fair value through profit or loss	65,304	55,971	55,971	37,472
Financial liabilities at amortized cost	903,101	€ 883,320	883,320	791,646
Deposits - Central banks
Deposits [Line Items]
Financial liabilities held for trading			282	1,351
Financial liabilities designated at fair value through profit or loss	14,816		8,860	9,112
Financial liabilities at amortized cost	72,523		71,414	44,112
Total financial liabilities	87,339		80,556	54,575
Deposits - Credit institutions
Deposits [Line Items]
Financial liabilities held for trading			292	44
Financial liabilities designated at fair value through profit or loss	10,891		18,166	5,015
Financial liabilities at amortized cost	89,679		91,300	89,764
Total financial liabilities	100,570		109,758	94,823
Demand Deposit [Member] | Deposits - Central banks
Deposits [Line Items]
Total financial liabilities	5		5	5
Demand Deposit [Member] | Deposits - Credit institutions
Deposits [Line Items]
Total financial liabilities	6,154		6,444	4,220
Time Deposits [Member] | Deposits - Central banks
Deposits [Line Items]
Total financial liabilities	82,797		78,801	46,278
Time Deposits [Member] | Deposits - Credit institutions
Deposits [Line Items]
Total financial liabilities	53,421		54,159	61,321
Reverse repurchase agreements | Deposits - Central banks
Deposits [Line Items]
Total financial liabilities	4,537		1,750	8,292
Reverse repurchase agreements | Deposits - Credit institutions
Deposits [Line Items]
Total financial liabilities	40,873		49,049	29,277
Subordinated liabilities | Deposits - Credit institutions
Deposits [Line Items]
Total financial liabilities	122		106	5
EUR
Deposits [Line Items]
Total financial liabilities	97,323		119,606	74,746
GBP
Deposits [Line Items]
Total financial liabilities	19,301		14,820	12,237
USD
Deposits [Line Items]
Total financial liabilities	45,848		33,259	40,514
BRL
Deposits [Line Items]
Total financial liabilities	18,657		16,485	16,537
Other currencies
Deposits [Line Items]
Total financial liabilities	€ 6,780		€ 6,144	€ 5,364

Customer deposits (Details)

Customer deposits (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Customer Deposits [Line Items]
Financial liabilities held for trading	€ 70,343	€ 107,634	€ 107,624	€ 108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Financial liabilities at amortised cost	1,171,630	1,126,069	1,126,069	1,044,240
Total financial liabilities	187,909		190,314	149,398
Deposits
Customer Deposits [Line Items]
Financial liabilities held for trading		28,753	28,753	11,391
Financial liabilities designated at fair value through profit or loss	65,304	55,971	55,971	37,472
Financial liabilities at amortised cost	903,101	€ 883,320	883,320	791,646
Deposits - Customers
Customer Deposits [Line Items]
Financial liabilities held for trading			28,179	9,996
Financial liabilities designated at fair value through profit or loss	39,597		28,945	23,345
Financial liabilities at amortised cost	740,899		720,606	657,770
Total financial liabilities	780,496		777,730	691,111
Deposits - Customers | SPAIN
Customer Deposits [Line Items]
Total financial liabilities	267,210		260,181	181,888
Deposits - Customers | European Union (excluding Spain)
Customer Deposits [Line Items]
Total financial liabilities	309,615		318,580	295,059
Deposits - Customers | United States and Puerto Rico
Customer Deposits [Line Items]
Total financial liabilities	53,843		50,771	63,429
Deposits - Customers | Other OECD countries
Customer Deposits [Line Items]
Total financial liabilities	67,462		62,980	62,761
Deposits - Customers | Latin America (non-OECD)
Customer Deposits [Line Items]
Total financial liabilities	82,343		84,752	87,519
Deposits - Customers | Rest of World
Customer Deposits [Line Items]
Total financial liabilities	23		466	455
Deposits - Customers | Current Deposits From Customers [Member]
Customer Deposits [Line Items]
Total financial liabilities	346,345		328,217	279,494
Deposits - Customers | Savings Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	196,493		189,845	180,611
Deposits - Customers | Other Demand Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	5,873		7,010	7,156
Deposits - Customers | Fixed Term and Other Term Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	195,540		195,285	176,581
Deposits - Customers | Home Purchase Savings Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	40		45	50
Deposits - Customers | Discount Time Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	3		3	448
Deposits - Customers | Hybrid Financial Liabilities Deposits [Member]
Customer Deposits [Line Items]
Total financial liabilities	3,419		4,295	3,986
Deposits - Customers | Subordinated liabilities
Customer Deposits [Line Items]
Total financial liabilities	23		21	24
Deposits - Customers | Repurchase Agreement [Member]
Customer Deposits [Line Items]
Total financial liabilities	€ 32,760		€ 53,009	€ 42,761

Marketable debt securities - Br

Marketable debt securities - Breakdown (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Marketable debt securities
Financial liabilities held for trading	€ 70,343	€ 107,634	€ 107,624	€ 108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Financial liabilities at amortized cost	1,171,630	1,126,069	1,126,069	1,044,240
Total financial liabilities	187,909		190,314	149,398
Marketable debt securities
Marketable debt securities
Financial liabilities designated at fair value through profit or loss	2,305	3,056	3,056	2,791
Financial liabilities at amortized cost	244,314	€ 214,910	214,910	226,078
Total financial liabilities	246,619		217,966	228,869
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities and Notes and Other Securities
Marketable debt securities
Total financial liabilities	246,619		217,966	228,869
Marketable debt securities | Bonds and debentures
Marketable debt securities
Total financial liabilities	195,498		176,719	183,278	€ 182,073
Marketable debt securities | Subordinated liabilities
Marketable debt securities
Total financial liabilities	23,676		21,382	19,873
Marketable debt securities | Notes and other securities
Marketable debt securities
Total financial liabilities	€ 27,445		€ 19,865	€ 25,718

Marketable debt securities - Bo

Marketable debt securities - Bonds and Debentures Maturities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Marketable debt securities
Financial liabilities	€ 187,909	€ 190,314	€ 149,398
Marketable debt securities
Marketable debt securities
Financial liabilities	246,619	217,966	228,869
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities
Marketable debt securities
Financial liabilities	219,174
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities | Within one year
Marketable debt securities
Financial liabilities	38,081
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities | 1 to 3 years
Marketable debt securities
Financial liabilities	71,092
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities | 3 to 5 years
Marketable debt securities
Financial liabilities	38,501
Marketable debt securities | Bonds and Debentures and Subordinated Liabilities | More than five years
Marketable debt securities
Financial liabilities	71,500
Marketable debt securities | Subordinated liabilities
Marketable debt securities
Financial liabilities	23,676	21,382	19,873
Marketable debt securities | Subordinated liabilities | Within one year
Marketable debt securities
Financial liabilities	580
Marketable debt securities | Subordinated liabilities | 1 to 3 years
Marketable debt securities
Financial liabilities	129
Marketable debt securities | Subordinated liabilities | 3 to 5 years
Marketable debt securities
Financial liabilities	1,341
Marketable debt securities | Subordinated liabilities | More than five years
Marketable debt securities
Financial liabilities	21,626
Marketable debt securities | Bonds and debentures
Marketable debt securities
Financial liabilities	195,498	€ 176,719	€ 183,278	€ 182,073
Marketable debt securities | Bonds and debentures | Within one year
Marketable debt securities
Financial liabilities	37,501
Marketable debt securities | Bonds and debentures | 1 to 3 years
Marketable debt securities
Financial liabilities	70,963
Marketable debt securities | Bonds and debentures | 3 to 5 years
Marketable debt securities
Financial liabilities	37,160
Marketable debt securities | Bonds and debentures | More than five years
Marketable debt securities
Financial liabilities	49,874
Marketable debt securities | Covered bonds
Marketable debt securities
Financial liabilities	85,436
Marketable debt securities | Covered bonds | Within one year
Marketable debt securities
Financial liabilities	16,009
Marketable debt securities | Covered bonds | 1 to 3 years
Marketable debt securities
Financial liabilities	29,105
Marketable debt securities | Covered bonds | 3 to 5 years
Marketable debt securities
Financial liabilities	12,287
Marketable debt securities | Covered bonds | More than five years
Marketable debt securities
Financial liabilities	28,035
Marketable debt securities | Other bonds and debentures
Marketable debt securities
Financial liabilities	110,062
Marketable debt securities | Other bonds and debentures | Within one year
Marketable debt securities
Financial liabilities	21,492
Marketable debt securities | Other bonds and debentures | 1 to 3 years
Marketable debt securities
Financial liabilities	41,858
Marketable debt securities | Other bonds and debentures | 3 to 5 years
Marketable debt securities
Financial liabilities	24,873
Marketable debt securities | Other bonds and debentures | More than five years
Marketable debt securities
Financial liabilities	€ 21,839

Marketable debt securities - _2

Marketable debt securities - Bonds and Debentures by Currency (Details) - EUR (€) € in Millions	Feb. 06, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Marketable debt securities
Financial liabilities		€ 187,909	€ 190,314	€ 149,398
Outstanding issue amount in foreign currency		318,807
Annual interest rate (as a percent)	7.50%
EUR
Marketable debt securities
Financial liabilities		97,323	119,606	74,746
USD
Marketable debt securities
Financial liabilities		45,848	33,259	40,514
GBP
Marketable debt securities
Financial liabilities		19,301	14,820	12,237
BRL
Marketable debt securities
Financial liabilities		18,657	16,485	16,537
Other currencies
Marketable debt securities
Financial liabilities		6,780	6,144	5,364
Marketable debt securities
Marketable debt securities
Financial liabilities		246,619	217,966	228,869
Marketable debt securities | Bonds and debentures
Marketable debt securities
Financial liabilities		195,498	176,719	183,278	€ 182,073
Marketable debt securities | Bonds and debentures | EUR
Marketable debt securities
Financial liabilities		85,479	83,321	77,231
Outstanding issue amount in foreign currency		€ 85,479
Annual interest rate (as a percent)		1.25%
Marketable debt securities | Bonds and debentures | USD
Marketable debt securities
Financial liabilities		€ 62,021	48,688	48,134
Outstanding issue amount in foreign currency		€ 71,014
Annual interest rate (as a percent)		3.14%
Marketable debt securities | Bonds and debentures | GBP
Marketable debt securities
Financial liabilities		€ 16,616	13,279	15,098
Outstanding issue amount in foreign currency		€ 14,864
Annual interest rate (as a percent)		2.40%
Marketable debt securities | Bonds and debentures | BRL
Marketable debt securities
Financial liabilities		€ 15,778	17,309	27,152
Outstanding issue amount in foreign currency		€ 70,117
Annual interest rate (as a percent)		5.53%
Marketable debt securities | Bonds and debentures | Chilean peso
Marketable debt securities
Financial liabilities		€ 6,460	5,876	6,592
Outstanding issue amount in foreign currency		€ 5,133,310
Annual interest rate (as a percent)		5.00%
Marketable debt securities | Bonds and debentures | Other currencies
Marketable debt securities
Financial liabilities		€ 9,144	€ 8,246	€ 9,070

Marketable debt securities - Ch

Marketable debt securities - Changes in Bonds and Debentures (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	€ 190,314	€ 149,398
Balance at year-end	187,909	190,314	€ 149,398
Marketable debt securities
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	217,966	228,869
Balance at year-end	246,619	217,966	228,869
Marketable debt securities | Bonds and debentures
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	176,719	183,278	182,073
Net inclusion of entities in the Group		11,426	1,009
Issues	68,306	62,260	57,012
Repurchases or redemptions	(48,319)	(66,871)	(59,036)
Exchange rate and other adjustments	(1,208)	(13,374)	2,219
Balance at year-end	195,498	176,719	183,278
Marketable debt securities | Bonds and debentures | Banco Popular Espanol, S.A.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Net inclusion of entities in the Group		11,426
Marketable debt securities | Bonds and debentures | Banca PSA Italia S.P.A.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Net inclusion of entities in the Group			500
Repurchases or redemptions	(600)
Marketable debt securities | Bonds and debentures | PSA Bank Deutschland GmbH
Reconciliation of changes in fair value measurement, liabilities [abstract]
Net inclusion of entities in the Group			497
Marketable debt securities | Bonds and debentures | Banco Santander (Brasil) S.A
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	16,422	16,732	7,699
Repurchases or redemptions	(14,802)	(23,187)	(7,579)
Marketable debt securities | Bonds and debentures | Santander Consumer USA Holdings Inc.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	15,627	11,242	11,699
Repurchases or redemptions	(11,939)	(10,264)	(11,166)
Marketable debt securities | Bonds and debentures | Grupo Santander UK
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	14,984	7,625	12,815
Repurchases or redemptions	(6,800)	(13,303)	(13,163)
Marketable debt securities | Bonds and debentures | Santander Consumer Finance, S.A.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	3,605	2,508	4,567
Repurchases or redemptions	(2,366)	(1,618)	(4,117)
Marketable debt securities | Bonds and debentures | Banco Santander - Chile
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	1,483	579	3,363
Repurchases or redemptions	(204)	(1,442)	(516)
Marketable debt securities | Bonds and debentures | Santander Consumer Bank A.S.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	1,342	1,117	1,537
Repurchases or redemptions	(1,268)	(337)	(710)
Marketable debt securities | Bonds and debentures | Santander Holding USA, Inc.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	1,210	4,133	2,798
Repurchases or redemptions	(903)	(759)	(1,786)
Marketable debt securities | Bonds and debentures | PSA Banque France
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	716	1,032
Marketable debt securities | Bonds and debentures | Banco Santander (Mexico), S.A., Institucion De Banca Multiple, Grupo Financiero Santander Mexico [Member]
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	560	118	1,840
Repurchases or redemptions	(579)	(224)	(1,453)
Marketable debt securities | Bonds and debentures | Santander Consumer Bank AG
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues		749
Marketable debt securities | Bonds and debentures | PSA Financial Services, Spain, EFC, SA
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues			726
Marketable debt securities | Bonds and debentures | SCF Rahoituspalvelut KIMI VI DAC
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues		635
Marketable debt securities | Bonds and debentures | Auto ABS French Lease Master Compartiment 2016
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues			635
Marketable debt securities | Bonds and debentures | Banco Santander Totta SA
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues		1,999
Repurchases or redemptions	(41)	(998)	(856)
Marketable debt securities | Bonds and debentures | Santander International Products, Plc.
Reconciliation of changes in fair value measurement, liabilities [abstract]
Repurchases or redemptions	(491)	(310)	(332)
Marketable debt securities | Bonds and debentures | Santander Bank, National Association
Reconciliation of changes in fair value measurement, liabilities [abstract]
Repurchases or redemptions		(886)
Banco Santander S.A. | Marketable debt securities | Bonds and debentures
Reconciliation of changes in fair value measurement, liabilities [abstract]
Issues	7,683	10,712	6,385
Repurchases or redemptions	€ (4,752)	€ (9,956)	€ (12,837)

Marketable debt securities - Gu

Marketable debt securities - Guarantees and Spanish mortgage-market issues (Details) - Marketable debt securities - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Guarantees
Face value of the outstanding mortgage loans and credits that support the issuance of mortgage-backed and mortgage bonds pursuant to Royal Decree 716/2009 (excluding	€ 85,610	€ 91,094	€ 56,871
Loans eligible to cover issues of mortgage-backed securities	60,195	59,422	38,426
Transfers of assets retained on balance sheet: mortgage-backed certificates and other securitized mortgage assets	15,807	18,202	19,509
Covered bonds
Guarantees
Liabilities secured by asset-backed securities	38,140	32,505	38,825
Liabilities secured by mortgage-backed securities	5,197	4,034	8,561
Liabilities secured by other mortgage securities	46,026	52,497	44,616
Liabilities secured by mortgage-backed bonds	22,023	23,907	16,965
Liabilities secured by territorial covered bond	1,270	1,270	592
Liabilities secured by financial assets	€ 85,436	€ 86,272	€ 84,033
Other asset - backed securities personal loans average maturities	5 years
Other asset - backed securities SME's average maturities	7 years
Covered bonds | Minimum
Guarantees
Mortgage-backed securities average maturities	10 years
Mortgage-backed bonds average maturities	10 years
Covered bonds | Maximum
Guarantees
Mortgage-backed securities loan-to-value ratio (as a percent)	80.00%
Mortgage-backed bonds loan-to-value ratio for home loans (as a percent)	80.00%
Mortgage-backed bonds loan-to-value ratio for other assets loans (as a percent)	60.00%

Marketable debt securities - Mo

Marketable debt securities - Mortgage-backed bonds (Details) - Marketable debt securities - Covered bonds - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Guarantees
Mortgage-backed bonds	€ 22,023	€ 23,907	€ 16,965
Santander Consumer Finance, S.A.
Guarantees
Mortgage-backed bonds	500
Banco Santander S.A.
Guarantees
Mortgage-backed bonds	€ 21,523

Subordinated Liabilities - Brea

Subordinated Liabilities - Breakdown (Details) - Financial liabilities at amortized cost € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018GBP (£)	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount			€ 23,820	€ 21,510	€ 19,902	€ 21,153
EUR
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount			14,001	11,240	8,044
Annual interest rate (as percent)	3.89%
USD
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount		$ 8,946	7,813	8,008	9,349
Annual interest rate (as percent)	5.30%
GBP
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	£ 562		628	874	949
Annual interest rate (as percent)	8.92%
BRL
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				131	136
Other currencies
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount			1,378	1,257	1,424
Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount			345	404	413
Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount			€ 9,717	€ 8,369	€ 6,916

Subordinated Liabilities - Chan

Subordinated Liabilities - Changes (Details) - Financial liabilities at amortized cost - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Balance at beginning of year	€ 21,510	€ 19,902	€ 21,153
Net inclusion of entities in the Group		11
Placements	3,283	2,994	2,395
Redemptions and repurchases	(1,259)	(870)	(2,812)
Exchange differences and other movements	286	(527)	(834)
Balance at end of year	23,820	21,510	19,902
Net issuances, redemptions and repurchases	2,024
Interest paid in remuneration of issuances	1,245
Banco Santander (Mexico), S.A., Institucion De Banca Multiple, Grupo Financiero Santander Mexico [Member]
Financial instruments
Placements	281		59
Redemptions and repurchases	(125)
PSA Banque France
Financial instruments
Placements	235
Santander Bank Polska SA [Member]
Financial instruments
Placements		78
Santander UK plc
Financial instruments
Redemptions and repurchases	(313)	(60)	(51)
Santander Holding USA, Inc.
Financial instruments
Redemptions and repurchases	(195)	(72)
Santander Bank, National Association
Financial instruments
Redemptions and repurchases	(163)	(285)
Banco Santander (Brasil) S.A
Financial instruments
Redemptions and repurchases	(62)		(716)
Santander Consumer Finance, S.A.
Financial instruments
Redemptions and repurchases			(70)
Banco Santander S.A.
Financial instruments
Net inclusion of entities in the Group		11
Placements	2,750	2,894	2,328
Redemptions and repurchases	€ (401)	€ (453)	€ (1,976)

Subordinated Liabilities - Othe

Subordinated Liabilities - Other disclosures (Details) £ / shares in Units, € in Millions, £ in Millions, $ in Millions	1 Months Ended				12 Months Ended
	Oct. 31, 2018USD ($)	Apr. 30, 2018EUR (€)	Mar. 31, 2018EUR (€)	Feb. 28, 2018EUR (€)	Dec. 31, 2018GBP (£)item£ / shares	Dec. 31, 2018EUR (€)item	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)
Financial instruments
Number of issuance of convertible preference shares | item					3	3
Notional amount										€ 318,807
Issuance By Banco Santander S.A. In March 2014 [Member]
Financial instruments
Notional amount										€ 1,500
Interest rate (as a percent)					6.25%				6.25%	6.25%
Initial interest rate term					5 years	5 years
Adjustment to reference rate, after initial interest rate period					5.41%				5.41%	5.41%
Reference rate, after initial interest rate period					5-year Mid-Swap Rate	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In May 2014 [Member]
Financial instruments
Notional amount | $									$ 1,500
Interest rate (as a percent)					6.375%				6.375%	6.375%
Initial interest rate term					5 years	5 years
Adjustment to reference rate, after initial interest rate period					4.788%				4.788%	4.788%
Reference rate, after initial interest rate period					5-year Mid-Swap Rate	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In September 2014 [Member]
Financial instruments
Notional amount										€ 1,500
Interest rate (as a percent)					6.25%				6.25%	6.25%
Initial interest rate term					7 years	7 years
Reprice term					5 years	5 years
Adjustment to reference rate, after initial interest rate period					5.64%				5.64%	5.64%
Reference rate, after initial interest rate period					5-year Mid-Swap Rate	5-year Mid-Swap Rate
Issuance By Banco Santander S.a. In April 2017 [Member]
Financial instruments
Notional amount										€ 750
Interest rate (as a percent)					6.75%				6.75%	6.75%
Initial interest rate term					5 years	5 years
Adjustment to reference rate, after initial interest rate period					6.803%				6.803%	6.803%
Reference rate, after initial interest rate period					5-year Mid-Swap Rate	5-year Mid-Swap Rate
Issuance By Banco Santander S.a. In September 2017 [Member]
Financial instruments
Notional amount										€ 1,000
Interest rate (as a percent)					5.25%				5.25%	5.25%
Initial interest rate term					6 years	6 years
Adjustment to reference rate, after initial interest rate period					4.999%				4.999%	4.999%
Issuance BY Banco Santander S.A. In February 2018 [Member]
Financial instruments
Outstanding issue amount				€ 1,250
Interest rate (as a percent)				2.125%
Initial interest rate term				10 years
Issuance By Banco Santander S.A. In March 2018 [Member]
Financial instruments
Outstanding issue amount			€ 1,500
Interest rate (as a percent)			4.75%
Initial interest rate term			7 years
Adjustment to reference rate, after initial interest rate period			4.10%
Issuance By Santander Bank Polska S.A. In April 2018 [Member]
Financial instruments
Outstanding issue amount		€ 1,000
Initial interest rate term		10 years
Adjustment to reference rate, after initial interest rate period		1.60%
Issuance By Banco Santander Mexico S.A. In October 2018 [Member]
Financial instruments
Outstanding issue amount | $	$ 1,300
Interest rate (as a percent)	5.95%
Initial interest rate term	10 years
Percentage of perpetual subordinated notes acquired	75.00%
Convertible Subordinated Issue | Santander UK plc
Financial instruments
Outstanding issue amount | £					£ 2,041
Amount acquired | £					£ 900
Conversion rate | £ / shares					£ 1
Subordinated liabilities
Financial instruments
Accrued interest							€ 966	€ 945		€ 770
Increase in accrued interest						€ 560	€ 395	€ 334
CCPSs
Financial instruments
Common Equity Tier 1 Ratio (CET1) maximum threshold percentage for conversion of the subordinated issue					5.125%				5.125%	5.125%
Tier 1 Perpetual Subordinated Notes | Banco Santander (Brasil) S.A
Financial instruments
Notional amount | $									$ 1,248
Percentage of perpetual subordinated notes acquired					89.60%				89.60%	89.60%
Common Equity Tier 1 Ratio (CET1) maximum threshold percentage for conversion of the subordinated issue					5.125%				5.125%	5.125%
Perpetual Subordinated Notes | Grupo Financiero Santander Mexico, S.A.B. De C.V. [Member]
Financial instruments
Notional amount | $									$ 500
Percentage of perpetual subordinated notes acquired					88.20%				88.20%	88.20%
Common Equity Tier 1 Ratio (CET1) maximum threshold percentage for conversion of the subordinated issue					5.125%				5.125%	5.125%

Other Financial Liabilities (De

Other Financial Liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Financial Liabilities [Abstract]
Trade payables	€ 1,323	€ 1,559	€ 1,230
Clearing houses	434	767	676
Tax collection accounts: Public Institutions	3,968	3,212	2,790
Factoring accounts payable	263	290	180
Unsettled financial transactions	3,373	6,375	7,418
Other financial liabilities	15,303	16,225	14,222
Other financial liabilities, total	€ 24,664	€ 28,428	€ 26,516

Provisions - Summary (Details)

Provisions - Summary (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of provision matrix [line items]
Provisions	€ 13,225	€ 14,686	€ 14,489	€ 14,459	€ 14,494
Provision for pensions and other employment defined benefit obligations
Disclosure of provision matrix [line items]
Provisions	5,558		6,345	6,576	6,356
Provision for other long term employee benefits
Disclosure of provision matrix [line items]
Provisions	1,239		1,686	1,712	1,916
Provision for taxes and other legal contingencies
Disclosure of provision matrix [line items]
Provisions	3,174		3,181	2,994
Provision for contingent liabilities and commitments
Disclosure of provision matrix [line items]
Provisions	779	€ 814	617	459	€ 618
Other provisions member
Disclosure of provision matrix [line items]
Provisions	€ 2,475		€ 2,660	€ 2,718

Provisions - Changes (Details)

Provisions - Changes (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of provision matrix [line items]
Balances at beginning of year	€ 14,489	€ 14,459	€ 14,494
Net inclusion of entities in the Group	(30)	1,754	28
Additions charged to income	2,493	3,344	2,790
Provision for pension interest expense	186	198	201
Staff costs	84	88	81
Extraordinary provisions	2,223	3,058	2,508
Addition	5,301	4,727	3,651
Release	(3,078)	(1,669)	(1,143)
Other additions arising from insurance contracts linked to pensions	(7)	(7)	(3)
Changes in value recognized in equity	(482)	369	1,275
Payments to pensioners and pre-retirees with a charge to internal provisions	(957)	(853)	(970)
Benefits paid or payable		(260)	(20)
Insurance premiums paid	(2)		(1)
Payments to external funds	(368)	(273)	(852)
Amounts used	(2,551)	(3,000)	(2,151)
Transfer, exchange differences and other changes	443	(1,044)	(131)
Balances at end of year	13,225	14,489	14,459
Provision for pensions and other employment defined benefit obligations
Disclosure of provision matrix [line items]
Balances at beginning of year	6,345	6,576	6,356
Net inclusion of entities in the Group		59	11
Additions charged to income	38	237	227
Provision for pension interest expense	165	175	170
Staff costs	78	82	73
Extraordinary provisions	(205)	(20)	(16)
Addition	7	2	24
Release	(212)	(22)	(40)
Other additions arising from insurance contracts linked to pensions	(7)	(7)	(3)
Changes in value recognized in equity	(482)	369	1,275
Payments to pensioners and pre-retirees with a charge to internal provisions	(332)	(355)	(367)
Benefits paid or payable		(260)	(20)
Insurance premiums paid	(2)		(1)
Payments to external funds	(368)	(273)	(852)
Transfer, exchange differences and other changes	366	(1)	(50)
Balances at end of year	5,558	6,345	6,576
Provision for other long term employee benefits
Disclosure of provision matrix [line items]
Balances at beginning of year	1,686	1,712	1,916
Net inclusion of entities in the Group		184	8
Additions charged to income	251	293	368
Provision for pension interest expense	21	23	31
Staff costs	6	6	8
Extraordinary provisions	224	264	329
Addition	227	264	377
Release	(3)		(48)
Payments to pensioners and pre-retirees with a charge to internal provisions	(625)	(498)	(603)
Transfer, exchange differences and other changes	(73)	(5)	23
Balances at end of year	1,239	1,686	1,712
Provision for contingent liabilities and commitments
Disclosure of provision matrix [line items]
Balances at beginning of year	617	459	618
Net inclusion of entities in the Group		146	(4)
Additions charged to income	(49)	(49)	(40)
Extraordinary provisions	(49)	(49)	(40)
Addition	455	606	226
Release	(504)	(655)	(266)
Amounts used	(3)	(3)	(2)
Transfer, exchange differences and other changes	17	64	(113)
Balances at end of year	779	617	459
Other combined provisions
Disclosure of provision matrix [line items]
Balances at beginning of year	5,841	5,712	5,604
Net inclusion of entities in the Group	(30)	1,365	13
Additions charged to income	2,253	2,863	2,235
Extraordinary provisions	2,253	2,863	2,235
Addition	4,612	3,855	3,024
Release	(2,359)	(992)	(789)
Amounts used	(2,548)	(2,997)	(2,149)
Transfer, exchange differences and other changes	133	(1,102)	9
Balances at end of year	€ 5,649	€ 5,841	€ 5,712

Provisions - Pensions and Simil

Provisions - Pensions and Similar Obligations (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of provision matrix [line items]
Provisions	€ 13,225	€ 14,686	€ 14,489	€ 14,459	€ 14,494
Provisions for defined benefits	6,791		8,026	8,277
SPAIN
Disclosure of provision matrix [line items]
Provisions for pre-retirements	1,172		1,630	1,644
Provisions For Pensions And Similar Obligations Member
Disclosure of provision matrix [line items]
Provisions	6,797		8,031	8,288
Provision for pensions and other employment defined benefit obligations
Disclosure of provision matrix [line items]
Provisions	5,558		6,345	6,576	6,356
Provision for pensions and other employment defined benefit obligations | SPAIN
Disclosure of provision matrix [line items]
Provisions	3,930		4,274	4,701
Provision for pensions and other employment defined benefit obligations | UK
Disclosure of provision matrix [line items]
Provisions	130		323	306
Provision for pensions and other employment defined benefit obligations | Other Foreign Countries
Disclosure of provision matrix [line items]
Provisions	1,498		1,748	1,569
Provision for other long term employee benefits
Disclosure of provision matrix [line items]
Provisions	1,239		1,686	1,712	€ 1,916
Provision for other long term employee benefits | SPAIN
Disclosure of provision matrix [line items]
Provisions	1,189		1,643	1,664
Provision for other long term employee benefits | Other Foreign Countries
Disclosure of provision matrix [line items]
Provisions	€ 50		€ 43	€ 48

Provisions - Spanish entities -

Provisions - Spanish entities - Post employment plans and other similar obligations (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)employee	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Employee Benefits
Number of employees accepted the pre-retirement and voluntary redundancy offers | employee	1,715
Provisions recognized to cover expenses of pre-retirement and voluntary redundancy offers	€ 209	€ 248	€ 361
Contributions to defined contribution pension funds	€ 287	271	266
Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(8.74%)
SPAIN
Employee Benefits
Contributions to defined contribution pension funds	€ 87	€ 90	€ 93
Actuarial assumptions
Annual discount rate	1.55%	1.40%
SPAIN | Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Decrease in actuarial assumption (as a percent)	0.50%
Increase in actuarial assumption (as a percent)	0.50%
Provision for pensions and other employment defined benefit obligations | SPAIN
Actuarial assumptions
Annual discount rate			1.50%
Mortality tables	PERM/F-2000	PERM/F-2000	PERM/F-2000
Cumulative annual CPI growth	1.00%	1.00%	1.00%
Annual salary increase rate			2.00%
Annual pension increase rate	1.00%	1.00%	1.00%
Sensitivity analysis for actuarial assumptions
Expected rate of return on plan assets	1.55%	1.40%	1.50%
Expected rate of return on reimbursement rights	1.55%	1.40%	1.50%
Provision for pensions and other employment defined benefit obligations | SPAIN | Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(4.88%)
Increase or decrease on obligations if increase in actuarial assumption (as a percent)	5.33%
Provision for other long term employee benefits | SPAIN
Actuarial assumptions
Annual discount rate	1.55%	1.40%	1.50%
Mortality tables	PERM/F-2000	PERM/F-2000	PERM/F-2000
Cumulative annual CPI growth	1.00%	1.00%	1.00%
Sensitivity analysis for actuarial assumptions
Expected rate of return on plan assets	1.55%	1.40%
Provision for other long term employee benefits | SPAIN | Minimum
Actuarial assumptions
Annual benefit increase rate	0.00%	0.00%	0.00%
Provision for other long term employee benefits | SPAIN | Maximum
Actuarial assumptions
Annual benefit increase rate	1.50%	1.50%	1.50%
Provision for other long term employee benefits | SPAIN | Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(1.09%)
Increase or decrease on obligations if increase in actuarial assumption (as a percent)	1.11%
Banco Popular Espanol, S.A. | Provision for pensions and other employment defined benefit obligations | SPAIN
Actuarial assumptions
Annual discount rate	1.55%
Annual salary increase rate	2.00%

Provisions - Spanish Entities_2

Provisions - Spanish Entities - Funding Status (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Total defined benefit expenses recognized in the consolidated income statements	€ 84	€ 88	€ 81
Actuarial gains and losses on defined benefit pension plans	618	(157)	(1,172)
Post-Employment Plans
Disclosure of net defined benefit liability (asset) [line items]
To current employees	60	138	50	€ 48	€ 62
Vested obligations to retired employees	5,332	5,662	4,423	4,551	4,708
Other	35	112	383	380	307
Present value of the obligations	5,427	5,912	4,856	4,979	5,077
Fair value of plan assets	1,500	1,640	157	157	167
Provisions - Provisions for pensions	3,927	4,272	4,699	4,822	4,910
Internal provisions for pensions	3,720	4,036	4,432	4,524	4,565
Insurance contracts linked to pensions	210	238	269	299	345
Unrecognized net assets for pensions	(3)	(2)	(2)	(1)
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Current service cost	18	16	11
Interest cost	73	79	91
Expected return on insurance contracts linked to pensions	(4)	(4)	(5)
Past service cost	3		6
Pre-retirement cost	1		6
Other	(4)	(2)	(21)
Total defined benefit expenses recognized in the consolidated income statements	87	89	88
Other similar obligations
Disclosure of net defined benefit liability (asset) [line items]
To pre-retirees	1,187	1,647	1,644	1,801	2,220
Long-service bonuses and other benefits	17	13	13	12	13
Other					4
Present value of the obligations	1,204	1,660	1,657	1,813	2,237
Fair value of plan assets	15	17
Provisions - Provisions for pensions	1,189	1,643	1,657	1,813	2,237
Internal provisions for pensions	1,189	1,642	1,657	€ 1,813	€ 2,237
Insurance contracts linked to pensions	1	1
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Current service cost	1	1	1
Interest cost	18	21	27
Actuarial (gains)/losses recognized in the year	7	13	6
Past service cost	5
Pre-retirement cost	208	248	355
Other			(1)
Total defined benefit expenses recognized in the consolidated income statements	239	283	388
SPAIN
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Actuarial gains and losses on defined benefit pension plans	€ (65)	€ 41	€ 141

Provisions - Spanish Entities_3

Provisions - Spanish Entities - Present Value of Obligations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [line items]
Actuarial losses (gains) arising from changes in financial assumptions, net defined benefit liability (asset)	€ (618)
Post-Employment Plans | Present value of defined benefit obligation
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset) at beginning of period	5,912	€ 4,856	€ 4,979
Net inclusion of entities in the Group	(36)	1,563
Current service cost	18	16	11
Interest cost	99	94	95
Pre-retirement cost	1		6
Effect of curtailment/settlement	(4)	(2)	(21)
Benefits paid	(423)	(388)	(353)
Benefits paid due to settlements		(260)
Past service cost	3		6
Actuarial (gains)/losses	(145)	57	136
Actuarial losses (gains) arising from changes in demographic assumptions, net defined benefit liability (asset)	(21)	(7)	15
Actuarial losses (gains) arising from changes in financial assumptions, net defined benefit liability (asset)	(124)	64	121
Exchange differences and other items	2	(24)	(3)
Net defined benefit liability (asset) at end of period	5,427	5,912	4,856
Other similar obligations | Present value of defined benefit obligation
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset) at beginning of period	1,660	1,657	1,813
Net inclusion of entities in the Group		202
Current service cost	1	1	1
Interest cost	18	21	27
Pre-retirement cost	208	248	355
Benefits paid	(617)	(490)	(570)
Past service cost	5
Actuarial (gains)/losses	6	13	6
Actuarial losses (gains) arising from changes in demographic assumptions, net defined benefit liability (asset)	(3)	10	(1)
Actuarial losses (gains) arising from changes in financial assumptions, net defined benefit liability (asset)	9	3	7
Exchange differences and other items	(77)	8	25
Net defined benefit liability (asset) at end of period	1,204	€ 1,660	€ 1,657
SPAIN
Disclosure of net defined benefit liability (asset) [line items]
Actuarial losses (gains) arising from changes in financial assumptions, net defined benefit liability (asset)	€ 65

Provisions - Spanish Entities_4

Provisions - Spanish Entities - Fair Value Of Plan Assets And Insurance Contracts Linked To Pensions (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Post-Employment Plans
Insurance contracts linked to pensions
Fair value of insurance contracts linked to pensions at beginning of year	€ 238	€ 269	€ 299
Expected return on insurance contracts linked to pensions	4	4	5
Benefits paid	(27)	(29)	(32)
Paid premiums	2	1
Actuarial gains/ (losses)	(7)	(7)	(3)
Fair value of insurance contracts linked to pensions at end of year	210	238	269
Other similar obligations
Insurance contracts linked to pensions
Fair value of insurance contracts linked to pensions at beginning of year	1
Incorporation of Group companies, net		2
Benefits paid	(1)	(1)
Fair value of insurance contracts linked to pensions at end of year	1	1
Plan Assets | Post-Employment Plans
Disclosure of net defined benefit liability (asset) [line items]
Fair value of plan assets at beginning of year	1,640	157	157
Net inclusion of entities in the Group		(1,507)
Expected return on plan assets	26	15	4
Benefits paid	(115)	(58)	(8)
Contributions/(surrenders)	21	3	9
Actuarial gains/(losses)	(73)	24	(2)
Exchange differences and other items	1	(8)	(3)
Fair value of plan assets at end of year	1,500	1,640	€ 157
Plan Assets | Other similar obligations
Disclosure of net defined benefit liability (asset) [line items]
Fair value of plan assets at beginning of year	17
Net inclusion of entities in the Group		(18)
Benefits paid	(2)	(1)
Actuarial gains/(losses)	(1)
Exchange differences and other items	1
Fair value of plan assets at end of year	€ 15	€ 17

Provisions - Spanish Entities_5

Provisions - Spanish Entities - Estimated Benefit Payable (Details) - SPAIN € in Millions	Dec. 31, 2018EUR (€)
Within one year
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 792
2019
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	662
2020
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	569
2021
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	486
2022
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	425
2023 to 2027
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 1,604

Provisions - United Kingdom ent

Provisions - United Kingdom entities - Post employment plans and other similar obligations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Benefits
Contributions to defined contribution pension funds	€ 287	€ 271	€ 266
Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(8.74%)
UK
Employee Benefits
Contributions to defined contribution pension funds	€ 93	€ 82	€ 81
Actuarial assumptions
Annual discount rate	2.90%	2.49%	2.79%
Mortality tables	108/86 S2 Light	108/86 S2 Light	116/98 S1 Light TMC
Cumulative annual CPI growth	3.22%	3.15%	3.12%
Annual salary increase rate	1.00%	1.00%	1.00%
Annual pension increase rate	2.94%	2.94%	2.92%
UK | Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Decrease in actuarial assumption (as a percent)	0.50%
Increase in actuarial assumption (as a percent)	0.50%
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	9.80%
Increase or decrease on obligations if increase in actuarial assumption (as a percent)	9.80%
UK | Inflation Rate Assumption
Sensitivity analysis for actuarial assumptions
Decrease in actuarial assumption (as a percent)	0.50%
Increase in actuarial assumption (as a percent)	0.50%
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(6.31%)
Increase or decrease on obligations if increase in actuarial assumption (as a percent)	6.57%

Provisions - United Kingdom E_2

Provisions - United Kingdom Entities - Funding Status (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Total defined benefit expenses recognized in the consolidated income statements	€ 84	€ 88	€ 81
Actuarial gains and losses on defined benefit pension plans	(618)	157	1,172
UK
Disclosure of net defined benefit liability (asset) [line items]
Present value of the obligations	12,079	13,056	12,955	€ 12,271	€ 11,959
Fair value of plan assets	12,887	13,239	13,118	12,880	12,108
Provisions - Provisions for pensions	(808)	(183)	(163)	(609)	(149)
Internal provisions for pensions	130	323	306	150	256
Net assets for pensions	(938)	(506)	(469)	€ (759)	€ (405)
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Current service cost	31	36	31
Interest cost, net	(6)	(6)	(22)
Total defined benefit expenses recognized in the consolidated income statements	25	30	9
Actuarial gains and losses on defined benefit pension plans	€ 481	€ (121)	€ (621)

Provisions - United Kingdom E_3

Provisions - United Kingdom Entities - Present Value of Obligations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [line items]
Financial actuarial (gains)/losses	€ (618)
UK
Disclosure of net defined benefit liability (asset) [line items]
Financial actuarial (gains)/losses	481
UK | Present value of defined benefit obligation
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset) at beginning of period	13,056	€ 12,955	€ 12,271
Current service cost	31	36	31
Interest cost	320	347	407
Benefits paid	(489)	(445)	(332)
Contributions made by employees	(24)	(20)	(20)
Actuarial (gains)/losses	(766)	602	2,315
Demographic actuarial (gains)/losses	(21)	(184)	(59)
Financial actuarial (gains)/losses	(745)	786	2,374
Exchange differences and other items	(97)	(459)	(1,757)
Net defined benefit liability (asset) at end of period	€ 12,079	€ 13,056	€ 12,955

Provisions - United Kingdom E_4

Provisions - United Kingdom Entities - Fair Value Of Plan Assets and Plan Assets Allocation (Details) - UK - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity instruments
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	17.00%	20.00%	25.00%
Debt instruments
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	50.00%	46.00%	49.00%
Investment property [Member]
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	10.00%	13.00%	12.00%
Other assets Member
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	23.00%	21.00%	14.00%
Plan Assets
Disclosure of net defined benefit liability (asset) [line items]
Fair value of plan assets at beginning of year	€ 13,239	€ 13,118	€ 12,880
Incorporation of Group companies, net	326	353	429
Expected return on plan assets	(489)	(445)	(332)
Benefits paid	209	208	304
Contributions	(285)	481	1,694
Exchange differences and other items	(113)	(476)	(1,857)
Fair value of plan assets at end of year	€ 12,887	€ 13,239	€ 13,118

Provisions - United Kingdom E_5

Provisions - United Kingdom Entities - Estimated Benefit Payable (Details) - UK € in Millions	Dec. 31, 2018EUR (€)
Within one year
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 297
2019
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	301
2020
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	321
2021
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	345
2022
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	363
2023 to 2027
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 2,127

Provisions - Other Foreign Subs

Provisions - Other Foreign Subsidiaries - Post employment plans and other similar obligations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Benefits
Contributions to defined contribution pension funds	€ 287	€ 271	€ 266
Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(8.74%)
Other Foreign Countries
Employee Benefits
Contributions to defined contribution pension funds	€ 107	€ 99	€ 92
Other Foreign Countries | Discount rate actuarial assumptions
Sensitivity analysis for actuarial assumptions
Decrease in actuarial assumption (as a percent)	0.50%
Increase in actuarial assumption (as a percent)	0.50%
Increase or decrease on obligations if decrease in actuarial assumption (as a percent)	(4.80%)
Increase or decrease on obligations if increase in actuarial assumption (as a percent)	5.25%
BRAZIL
Actuarial assumptions
Mortality tables	AT-2000
Cumulative annual CPI growth	4.00%
Minimum | BRAZIL
Actuarial assumptions
Annual discount rate	9.11%
Maximum | BRAZIL
Actuarial assumptions
Annual discount rate	9.26%

Provision - Other Foreign Subsi

Provision - Other Foreign Subsidiaries - Funding Status (Details) - EUR (€) € in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Actuarial gains and losses on defined benefit pension plans		€ 618	€ (157)	€ (1,172)
Other Foreign Countries
Disclosure of net defined benefit liability (asset) [line items]
Present value of the obligations		9,116	9,534	9,876	€ 8,337	€ 10,324
Charge to the participants		167	193	153	133	151
Fair value of plan assets		7,743	7,927	8,445	7,008	8,458
Provisions - Provisions for pensions		1,206	1,414	1,278	1,196	1,715
Internal provisions for pensions		1,541	1,787	1,613	1,478	1,999
Net assets for pensions		(77)	(98)	(52)	(28)	(8)
Unrecognized net assets for pensions		(258)	(275)	(283)	€ (254)	€ (276)
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Current service cost		34	35	38
Interest cost, net		101	104	105
Actuarial (gains)/losses recognized in the year		5	1	(9)
Past service cost		3	3	18
Pre-retirement cost		(6)		(9)
Other		(203)	(19)	(37)
Total defined benefit expenses (income) recognised in the consolidated income statements		(66)	124	106
Actuarial gains and losses on defined benefit pension plans		64	€ 207	€ 513
BRAZIL
Disclosure of net defined benefit liability (asset) [line items]
Present value of the obligations		6,649
Charge to the participants		167
Fair value of plan assets		6,046
Provisions - Provisions for pensions		436
Internal provisions for pensions		756
Net assets for pensions		(62)
Unrecognized net assets for pensions		€ (258)
Amounts recognized in the consolidated income statements in relation to the aforementioned defined benefit obligations
Reduction in commitments	€ 186

Provisions - Other Foreign Su_2

Provisions - Other Foreign Subsidiaries - Present Value of Obligations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [line items]
Financial actuarial (gains)/losses	€ (618)
Other Foreign Countries | Present value of defined benefit obligation
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset) at beginning of period	9,534	€ 9,876	€ 8,337
Net inclusion of entities in the Group	36	165	171
Current service cost	34	35	38
Interest cost	646	807	802
Pre-retirement cost	(6)		(9)
Effect of curtailment/settlement	(199)	(19)	(37)
Benefits paid	(634)	(716)	(690)
Benefits paid due to settlements		(24)	(1,352)
Contributions made by employees	5	6	8
Past service cost	3	3	18
Actuarial (gains)/losses	390	404	1,269
Demographic actuarial (gains)/losses	(59)	(140)	439
Financial actuarial (gains)/losses	449	544	830
Exchange differences and other items	(693)	(1,003)	1,321
Net defined benefit liability (asset) at end of period	€ 9,116	€ 9,534	€ 9,876

Provisions - Other Foreign Su_3

Provisions - Other Foreign Subsidiaries - Fair Value Of Plan Assets and Plan Assets Allocation (Details) - Other Foreign Countries - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity instruments
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	7.00%	6.00%	7.00%
Debt instruments
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	83.00%	84.00%	88.00%
Investment property [Member]
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	1.00%	3.00%	1.00%
Other assets Member
Disclosure of net defined benefit liability (asset) [line items]
Plan assets as a percentage of total plan assets	9.00%	7.00%	4.00%
Plan Assets
Disclosure of net defined benefit liability (asset) [line items]
Fair value of plan assets at beginning of year	€ 7,927	€ 8,445	€ 7,008
Net inclusion of entities in the Group		166	154
Expected return on plan assets	573	732	732
Benefits paid	(602)	(683)	(637)
Benefits paid due to settlements		(24)	(1,328)
Contributions	199	94	559
Actuarial gains/(losses)	308	203	687
Exchange differences and other items	(662)	(1,006)	1,270
Fair value of plan assets at end of year	€ 7,743	€ 7,927	€ 8,445

Provisions - Other Foreign Su_4

Provisions - Other Foreign Subsidiaries - Estimated benefit payable (Details) - Other Foreign Countries € in Millions	Dec. 31, 2018EUR (€)
Within one year
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 593
2019
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	603
2020
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	612
2021
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	629
2022
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	644
2023 to 2027
Disclosure of net defined benefit liability (asset) [line items]
Estimated future benefit payable	€ 3,429

Provisions (Details)

Provisions (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Disclosure of provision matrix [line items]
Provisions	€ 13,225	€ 14,489	€ 14,459	€ 14,686	€ 14,494
Other combined provisions
Disclosure of provision matrix [line items]
Provisions	5,649	5,841	5,712		€ 5,604
Provisions for taxes
Disclosure of provision matrix [line items]
Provisions	864	1,006	1,074
Provisions for other legal proceedings
Disclosure of provision matrix [line items]
Provisions	1,451	1,307	1,005
Provision for customer remediation
Disclosure of provision matrix [line items]
Provisions	652	885	685
Provision for customer remediation | Banco Popular Espanol, S.A.
Disclosure of provision matrix [line items]
Offset in part by the use of the available provisions	119	223
Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Provisions	105	101	253
Provision for restructuring
Disclosure of provision matrix [line items]
Provisions	492	360	472
Other
Disclosure of provision matrix [line items]
Provisions	1,226	1,314	1,308
SPAIN | Other combined provisions
Disclosure of provision matrix [line items]
Provisions	1,647	1,666	1,148
SPAIN | Provision for restructuring
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	290	425	244
Offset in part by the use of the available provisions	179	162	206
European Union (excluding Spain) | Other combined provisions
Disclosure of provision matrix [line items]
Provisions	1,044	1,127	1,300
Other Foreign Countries Not Including Countries In EU | Other combined provisions
Disclosure of provision matrix [line items]
Provisions	2,958	3,048	3,264
BRAZIL | Other combined provisions
Disclosure of provision matrix [line items]
Provisions	2,496	2,504	2,715
BRAZIL | Provisions for employment-related proceedings
Disclosure of provision matrix [line items]
Provisions	859	868	915
Additional provisions charged to income statement	288	505	395
Offset in part by the use of the available provisions	299	388	284
BRAZIL | Provisions for other legal proceedings
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	359	355	201
Offset in part by the use of the available provisions	191	203	239
UK | Provision for customer remediation
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	16	164	179
Offset in part by the use of the available provisions	128	106	173
UK | Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	73	106	173
Offset in part by the use of the available provisions	88	€ 151	€ 169
POLAND | Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	€ 100

Provisions - Litigation and oth

Provisions - Litigation and other matters (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of provision matrix [line items]
Provisions	€ 13,225	€ 14,686	€ 14,489	€ 14,459	€ 14,494
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Legal Action Filed Relating To Increase In Rate Of Brazilian Social Contribution Tax On Net Income Member
Disclosure of provision matrix [line items]
Social contribution tax rate on net income before increase	9.00%
Social contribution tax rate on net income after increase	15.00%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Legal Case Appeal Relating To Deduction Of Expenses In Income Tax (IRPJ and CSLL)
Disclosure of provision matrix [line items]
Provisions	€ 0
Banco Santander (Brasil) S.A | Legal Case Appeal Relating To Deduction Of Expenses In Income Tax (IRPJ and CSLL)
Disclosure of provision matrix [line items]
Provisions	0
Banco Santander (Brasil) S.A | Legal Case Relating To Tax Deductibility Of Amortization Of Goodwill Arising On Acquisition [Member]
Disclosure of provision matrix [line items]
Provisions	0
Banco Santander And Other Companies | Legal Case Relating To Investigation Into Illegal State Aid To The Kingdom Of Spain [Member]
Disclosure of provision matrix [line items]
Provisions	0
Other combined provisions
Disclosure of provision matrix [line items]
Provisions	5,649		5,841	5,712	€ 5,604
Provisions for taxes
Disclosure of provision matrix [line items]
Provisions	€ 864		€ 1,006	€ 1,074

Provisions - Non-tax-related pr

Provisions - Non-tax-related proceedings (Details) € in Millions, £ in Millions	Feb. 13, 2018EUR (€)item	Nov. 30, 2018	Feb. 28, 2017item	Dec. 31, 2018EUR (€)item	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2008EUR (€)item	Dec. 31, 2018EUR (€)	Dec. 31, 2018GBP (£)	Dec. 31, 2018EUR (€)	Jan. 02, 2018EUR (€)	Dec. 31, 2017GBP (£)	Dec. 31, 2017EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of provision matrix [line items]
Provisions						€ 14,459				€ 13,225	€ 14,686		€ 14,489	€ 14,494
Extraordinary provision made				€ 5,301	€ 4,727	3,651
Extraordinary provision used				€ 3,078	1,669	1,143
Number Of State Attorneys General Represented By Executive Committee | item			32
Arbitration Cases Received FINRA | item				589
Arbitration Cases Pending FINRA | item				420
"Planos Econmicos"
Disclosure of provision matrix [line items]
Period Of Suspension Of Economic Plan Processes		2 years
Legal Case To Request Court Judgment On The Validity Of The Swaps
Disclosure of provision matrix [line items]
Arbitration Matter, Amount Claimed By Entity							€ 66
Arbitration Matter, Number Of Hearings | item							2
Arbitration Matter, Number Of Awards In Favor Of Entity | item							2
Arbitration Matter, Amount Claimed By Counterparty							€ 56.8
Administrative Investigation, Possible Collusion, Hedge For Syndicated Loans [Member]
Disclosure of provision matrix [line items]
Number of other public companies as other parties in the transaction | item	3
Fine imposed, all parties	€ 91
Fine imposed, Santander portion	€ 23.9
Floor Clauses
Disclosure of provision matrix [line items]
Provisions										104
Provision used, other provisions				€ 119	238			€ 357
Maximum risk					900
Other combined provisions
Disclosure of provision matrix [line items]
Provisions						5,712				5,649			5,841	€ 5,604
Extraordinary provision made				4,612	3,855	3,024
Extraordinary provision used				2,359	992	789
Provision for customer remediation
Disclosure of provision matrix [line items]
Provisions						€ 685				652			885
Provision for customer remediation | Banco Popular Espanol, S.A.
Disclosure of provision matrix [line items]
Provision used, other provisions				€ 119	€ 223
Provision For Customer Remediation PPI Redress And Related Costs
Disclosure of provision matrix [line items]
Provisions									£ 246	€ 275		£ 356	€ 406

Other liabilities (Details)

Other liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Miscellaneous liabilities [abstract]
Transactions in transit	€ 803	€ 811	€ 994
Accrued expenses and deferred income	6,621	6,790	6,507
Other	5,664	4,990	3,569
Other liabilities	€ 13,088	€ 12,591	€ 11,070

Tax matters - Years open for re

Tax matters - Years open for review by the tax authorities (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Provision for taxes and other legal contingencies
Disclosure of other provisions [line items]
Provisions recognised	€ 0

Tax matters - Reconciliation (D

Tax matters - Reconciliation (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated profit (loss) before tax
Tax rate applicable in Spain (as a percent)	30.00%	30.00%	30.00%
Consolidated profit (loss) before tax	€ 14,201	€ 12,091	€ 10,768
Income tax at tax rate applicable in Spain	4,260	3,628	3,230
By the effect of application of the various tax rates applicable in each country	509	539	312
Effect of profit or loss of associates and joint ventures	(221)	(211)	(133)
Effect of deduction of goodwill in Brazil		(164)	(184)
Effect of reassessment of deferred taxes		(282)	(20)
Permanent differences	338	374	77
Current income tax	€ 4,886	€ 3,884	€ 3,282
Effective tax rate (as a percent)	34.40%	32.12%	30.48%
Current taxes	€ 4,763	€ 3,777	€ 1,493
Deferred taxes	(123)	(107)	(1,789)
Taxes paid in the year	3,342	4,137	2,872
Aggregate continuing and discontinued operations [member]
Consolidated profit (loss) before tax
Consolidated profit (loss) before tax	€ 14,201	12,091	10,768
BRAZIL
Consolidated profit (loss) before tax
Tax rate applicable in Spain (as a percent)	25.00%
By the effect of application of the various tax rates applicable in each country	€ 719	656	396
Effective tax rate (as a percent)	40.00%
UK
Consolidated profit (loss) before tax
By the effect of application of the various tax rates applicable in each country	€ (99)	(78)	(63)
UNITED STATES
Consolidated profit (loss) before tax
By the effect of application of the various tax rates applicable in each country	(57)	68	94
CHILE
Consolidated profit (loss) before tax
By the effect of application of the various tax rates applicable in each country	€ (35)	€ (48)	€ (54)

Tax matters - Tax recognized in

Tax matters - Tax recognized in equity (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other comprehensive income
Tax recognized in equity, Items not reclassified to profit or loss	€ (225)	€ 60	€ 364
Actuarial gains or (-) losses on defined benefit pension plans	(199)	60	364
Financial liabilities at fair value with changes in results attributed to changes in credit risk	(26)
Tax recognized in equity, Items that may be reclassified to profit or loss	124		(694)
Cash flow hedges	(50)	108	(136)
Financial assets available for sale		(97)	(552)
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	167
Other recognized income and expense of investments in subsidiaries, joint ventures and associates	7	(11)	(6)
Total	€ (101)	60	(330)
Debt instruments
Other comprehensive income
Financial assets available for sale		(366)	(368)
Equity instruments
Other comprehensive income
Financial assets available for sale		€ 269	€ (184)

Tax matters - Deferred taxes (D

Tax matters - Deferred taxes (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 23,258	€ 23,210	€ 21,264	€ 22,045
Tax liabilities	5,568	4,837	5,694	5,565
Portion already submitted for conversion	995	486
Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	10,866	11,046	9,649
Other
Detail of deferred tax assets and liabilities
Deferred tax assets	12,392	12,164	11,615
SPAIN
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 12,987
SPAIN | Monetizable
Detail of deferred tax assets and liabilities
Annual fee to maintain the monetized portion of deferred taxes (as a percent)	1.50%
ITALY | Monetizable
Detail of deferred tax assets and liabilities
Annual fee to maintain the monetized portion of deferred taxes (as a percent)	1.50%
BRAZIL
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 5,869
UNITED STATES
Detail of deferred tax assets and liabilities
Deferred tax assets	1,209
Tax losses and tax credits
Detail of deferred tax assets and liabilities
Deferred tax assets	4,276	4,457	4,934	4,808
Tax losses and tax credits | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	4,276	4,457	4,934
Tax losses and tax credits | SPAIN
Detail of deferred tax assets and liabilities
Deferred tax assets	3,100
Tax losses and tax credits | BRAZIL
Detail of deferred tax assets and liabilities
Deferred tax assets	228
Tax losses and tax credits | UNITED STATES
Detail of deferred tax assets and liabilities
Deferred tax assets	697
Temporary differences
Detail of deferred tax assets and liabilities
Deferred tax assets	18,982	18,753	16,330	17,237
Tax liabilities	5,568	4,837	5,694	5,565
Temporary differences | Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	10,866	11,046	9,649	€ 8,887
Temporary differences | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 8,116	7,707	6,681
Temporary differences | SPAIN
Detail of deferred tax assets and liabilities
Deferred tax asset recovery period	15 years
Temporary differences | SPAIN | Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 7,422
Temporary differences | SPAIN | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 2,465
Temporary differences | BRAZIL
Detail of deferred tax assets and liabilities
Deferred tax asset recovery period	10 years
Temporary differences | BRAZIL | Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	€ 3,249
Temporary differences | BRAZIL | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	2,392
Temporary differences | UNITED STATES
Detail of deferred tax assets and liabilities
Deferred tax assets	512
Non-deductible provisions | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	2,613	2,336	1,645
Valuation of financial instruments
Detail of deferred tax assets and liabilities
Tax liabilities	1,168	1,207	1,105
Valuation of financial instruments | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	609	530	1,042
Loan losses | Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	7,279	7,461	6,082
Loan losses | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	1,308	1,159	940
Pensions | Monetizable
Detail of deferred tax assets and liabilities
Deferred tax assets	3,587	3,585	3,567
Pensions | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	632	723	641
Valuation of tangible and intangible assets
Detail of deferred tax assets and liabilities
Tax liabilities	1,503	1,256	1,916
Valuation of tangible and intangible assets | Other
Detail of deferred tax assets and liabilities
Deferred tax assets	1,215	1,077	537
Investments in Group companies
Detail of deferred tax assets and liabilities
Tax liabilities	€ 880	€ 808	€ 1,265

Tax matters - Changes in tax as

Tax matters - Changes in tax assets and liabilities (Details) - EUR (€) € in Millions	Jan. 02, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
The changes in Tax assets - Deferred and Tax Liabilities - Deferred
Deferred tax assets - Balances at the beginning of the period		€ 23,210	€ 21,264	€ 22,045
IFRS9 Adoption impact	€ 680
(Charge)/Credit to income		241	(675)	(1,311)
Foreign currency balance translation differences and other items		(807)	(756)	1,355
(Charge)/Credit to asset and liability valuation adjustments		149	(1)	(551)
Acquisitions for the year (net)		(215)	3,378	(274)
Deferred tax assets - Balances at the end of the period		23,258	23,210	21,264
Deferred tax liabilities - Balances at the beginning of the period		(4,837)	(5,694)	(5,565)
(Charge)/Credit to income		(364)	568	(478)
Foreign currency balance translation differences and other items		(114)	414	98
(Charge)/Credit to asset and liability valuation adjustments		(315)	19	(26)
Acquisitions for the year (net)		62	(144)	277
Deferred tax liabilities - Balances at the end of the period		(5,568)	(4,837)	(5,694)
Balances at the beginning of the period		18,373	15,570	16,480
(Charge)/Credit to income		(123)	(107)	(1,789)
Foreign currency balance translation differences and other items		(921)	(342)	1,453
(Charge)/Credit to asset and liability valuation adjustments		(166)	18	(577)
Acquisitions for the year (net)		(153)	3,234	3
Balances at the end of the period		17,690	18,373	15,570
Deferred tax assets not recognized		5,500
Tax benefits not recognized		450
Monetizable
The changes in Tax assets - Deferred and Tax Liabilities - Deferred
Deferred tax assets - Balances at the beginning of the period		11,046	9,649
Deferred tax assets - Balances at the end of the period		10,866	11,046	9,649
Tax losses and tax credits
The changes in Tax assets - Deferred and Tax Liabilities - Deferred
Deferred tax assets - Balances at the beginning of the period		4,457	4,934	4,808
(Charge)/Credit to income		(128)	(279)	194
Foreign currency balance translation differences and other items		1	(205)	110
Acquisitions for the year (net)		(54)	7	(178)
Deferred tax assets - Balances at the end of the period		4,276	4,457	4,934
Temporary differences
The changes in Tax assets - Deferred and Tax Liabilities - Deferred
Deferred tax assets - Balances at the beginning of the period		18,753	16,330	17,237
IFRS9 Adoption impact	680
(Charge)/Credit to income		369	(396)	(1,505)
Foreign currency balance translation differences and other items		(808)	(551)	1,245
(Charge)/Credit to asset and liability valuation adjustments		149	(1)	(551)
Acquisitions for the year (net)		(161)	3,371	(96)
Deferred tax assets - Balances at the end of the period		18,982	18,753	16,330
Deferred tax liabilities - Balances at the beginning of the period		(4,837)	(5,694)	(5,565)
(Charge)/Credit to income		(364)	568	(478)
Foreign currency balance translation differences and other items		(114)	414	98
(Charge)/Credit to asset and liability valuation adjustments		(315)	19	(26)
Acquisitions for the year (net)		62	(144)	277
Deferred tax liabilities - Balances at the end of the period		(5,568)	(4,837)	(5,694)
Temporary differences | Monetizable
The changes in Tax assets - Deferred and Tax Liabilities - Deferred
Deferred tax assets - Balances at the beginning of the period		11,046	9,649	8,887
IFRS9 Adoption impact	€ 273
(Charge)/Credit to income		390	(185)	49
Foreign currency balance translation differences and other items		(843)	(455)	713
Acquisitions for the year (net)			2,037
Deferred tax assets - Balances at the end of the period		€ 10,866	€ 11,046	€ 9,649

Tax matters - Tax reforms and o

Tax matters - Tax reforms and other information (Details) - GBP (£)	Aug. 31, 2015	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax reforms
Income tax rate (as a percent)				30.00%	30.00%	30.00%
Total tax rate (as a percent)				34.40%	32.12%	30.48%
UNITED STATES
Tax reforms
Corporate tax rate (as a percent)				35.00%
ARGENTINA
Tax reforms
Income tax rate (as a percent)				35.00%
SPAIN
Tax reforms
Limit for the integration of deferred monetized tax assets (as a percent)					25.00%	70.00%
Limit of the tax rate for the application of deductions (as a percent)					50.00%
UK
Tax reforms
Corporate tax rate (as a percent)					19.00%
Surcharge on the standard income tax rate for bank profits (as a percent)						8.00%
Dividend exemption, generating potential tax credit				£ 2,000
BRAZIL
Tax reforms
Social contribution tax (as a percent)	15.00%			20.00%
Income tax rate (as a percent)				25.00%
Total tax rate (as a percent)				40.00%
POLAND
Tax reforms
Tax on certain bank assets (as a percent)				0.0366%
CHILE
Tax reforms
First Category tax rate (as a percent)					20.00%
Forecast | UNITED STATES | Changes in tax rates
Tax reforms
Corporate tax rate (as a percent)				21.00%
Forecast | ARGENTINA | Changes in tax rates
Tax reforms
Income tax rate (as a percent)		25.00%	30.00%	30.00%
Dividend withholding rate		13.00%	7.00%	7.00%
Forecast | CHILE | Changes in tax rates
Tax reforms
First Category tax rate (as a percent)				27.00%
Maximum | UK
Tax reforms
Corporate tax rate (as a percent)						20.00%
Minimum | UK
Tax reforms
Corporate tax rate (as a percent)		17.00%

Non-controlling interests - NCI

Non-controlling interests - NCI components (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	€ 9,384	€ 10,756	€ 10,479
Profit attributable to non-controlling interests	1,505	1,588	1,282
NON-CONTROLLING INTEREST	10,889	12,344	11,761	€ 12,236
Santander Consumer USA Holdings Inc.
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,652	1,479	1,963
Profit attributable to non-controlling interests	218	368	256
Santander Bank Polska SA [Member]
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,538	1,901	1,653
Profit attributable to non-controlling interests	173	160	148
Grupo PSA
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,409	1,305	1,149
Profit attributable to non-controlling interests	232	206	171
Banco Santander (Brasil) S.A
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,114	1,489	1,784
Profit attributable to non-controlling interests	292	288	194
Grupo Financiero Santander Mexico, S.A.B. De C.V. [Member]
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,093	1,056	1,069
Profit attributable to non-controlling interests	216	194	190
Banco Santander - Chile
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,085	1,209	1,204
Profit attributable to non-controlling interests	279	264	215
Grupo Metrovacesa
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period		836	449
Other Companies
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	1,493	1,481	1,208
Profit attributable to non-controlling interests	95	108	108
Santander UK plc
Non-controlling interests
Non-controlling interests, excluding profit (loss) for the current period	€ 1,280	€ 1,290	€ 753

Non-controlling interests - Cha

Non-controlling interests - Changes in NCI (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Non-controlling interests
Equity at beginning of period	€ 106,833	€ 102,699	€ 98,753
Ifrs Cumulative Effect Of New Accounting Principle In Period Of Adoption		(1,340)
Opening balance		105,493
Total recognized income and expenses	7,416	887	7,183
Profit attributable to non-controlling interests	1,505	1,588	1,282
Change of perimeter	(601)	(39)	(197)
Dividends	(3,892)	(3,496)	(3,189)
Equity at end of period	107,361	106,833	102,699
Non-Controlling interest
Non-controlling interests
Equity at beginning of period	12,344	11,761	10,713
Equity at end of period	10,889	12,344	11,761
Non-Controlling interest, Other comprehensive income
Non-controlling interests
Ifrs Cumulative Effect Of New Accounting Principle In Period Of Adoption		(1,292)
Opening balance		11,052	11,761	€ 10,713
Total recognized income and expenses	(109)	(583)	374
Exchange differences	(135)	(653)	360
Cash flow hedge	(1)	(11)	45
Available for sale - equity		(2)	(30)
Available for sale - fixed income		71	38
Changes in the fair value of equity instruments	(12)
Changes in the fair value of debt instruments	40
Other comprehensive income, Other	(1)	12	(39)
Non-Controlling interest, Other elements
Non-controlling interests
Other	(54)	1,166	674
Profit attributable to non-controlling interests	1,505	1,588	1,282
Modification of participation rates	(65)	(819)	(28)
Change of perimeter	(660)	(39)	(197)
Dividends	(687)	(665)	(800)
Changes in capital and others concepts	€ (147)	€ 1,101	€ 417

Non-controlling interests - C_2

Non-controlling interests - Change by subsidiary (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Non-controlling interests
Increases or ( ) decreases due to business combinations	€ (601)	€ (39)	€ (197)
Metrovacesa, S.A.
Non-controlling interests
Decrease in minority interest due to loss of control	826
Santander Consumer USA Holdings Inc.
Non-controlling interests
Percentage of voting equity interests acquired		9.65%
Increases or ( ) decreases due to business combinations		€ (492)
Non-Controlling interest | Metrovacesa, S.A.
Non-controlling interests
Decrease in minority interest due to operations		621	621
Non-Controlling interest | Remaining Geographies in PSA - Netherlands, Belgium, Italy, Germany, Brazil and Poland
Non-controlling interests
Increase in minority interest due to remaining geographies included in PSA framework agreement		410
Non-Controlling interest, Other elements
Non-controlling interests
Increases or ( ) decreases due to business combinations	€ (660)	€ (39)	€ (197)

Non-controlling interests - Oth

Non-controlling interests - Other information (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018
Non-controlling interests
Total assets	€ 1,459,271	€ 1,444,305	€ 1,339,125	€ 1,443,069
Total liabilities	1,351,910	1,337,472	1,236,426	€ 1,337,707
Total profit	9,315	€ 8,207	€ 7,486
Banco Santander (Brasil) S.A
Non-controlling interests
Total assets	166,036
Total liabilities	150,760
Net assets	15,276
Total gross income	13,345
Total profit	2,940
Banco Santander - Chile
Non-controlling interests
Total assets	50,911
Total liabilities	46,035
Net assets	4,876
Total gross income	2,535
Total profit	901
Grupo Financiero Santander Mexico, S.A.B. De C.V. [Member]
Non-controlling interests
Total assets	65,876
Total liabilities	60,507
Net assets	5,369
Total gross income	3,527
Total profit	975
Santander Bank Polska SA [Member]
Non-controlling interests
Total assets	43,669
Total liabilities	38,736
Net assets	4,933
Total gross income	1,488
Total profit	424
Santander Consumer USA Holdings Inc.
Non-controlling interests
Total assets	38,526
Total liabilities	32,340
Net assets	6,186
Total gross income	4,215
Total profit	€ 710

Other comprehensive income - AO

Other comprehensive income - AOCI components (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of analysis of other comprehensive income by item [line items]
OTHER ACCUMULATED COMPREHENSIVE INCOME	€ (22,141)	€ (21,829)	€ (21,776)	€ (15,039)
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	(2,936)	(3,267)	(4,034)	(3,933)
Actuarial gains or losses on defined benefit pension plans	(3,609)	(4,033)	(4,033)	(3,931)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	1	(1)	(1)	(2)
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	597	773
Reserve of gains and losses on hedging instruments that hedge investments in equity instruments	(4,312)	(4,311)	(4,311)	(4,925)
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	75	(6)
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	(19,205)	(18,562)	(17,742)	(11,106)
Hedge of net investments in foreign operations (effective portion)	(4,312)	(4,311)	(4,311)	(4,925)
Exchange differences	(15,730)	(15,430)	(15,430)	(8,070)
Hedging derivatives. Cash flow hedges (effective portion)	277	152	152	469
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	828	1,253
Financial assets available-for-sale			2,068	1,571
Share in other income and expenses recognized in investments in joint ventures and associates	(268)	€ (226)	(221)	(151)
Debt instruments
Disclosure of analysis of other comprehensive income by item [line items]
Financial assets available-for-sale	€ 831		1,154	423
Equity instruments
Disclosure of analysis of other comprehensive income by item [line items]
Financial assets available-for-sale			€ 914	€ 1,148

Other comprehensive income - It

Other comprehensive income - Items not reclassified: benefit plans (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ 618
SPAIN
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ (65)
Discount rates	1.55%	1.40%
UK
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ (481)
Discount rates	2.90%	2.49%	2.79%
Inflation rates	3.22%	3.15%	3.12%
BRAZIL
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ 95
Inflation rates	4.00%
Discount rate actuarial assumptions | Other Regions [Member]
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ (167)
Pension benefits | BRAZIL
Items not reclassified to profit or loss
Discount rates	9.11%	9.53%
Medical benefits | BRAZIL
Items not reclassified to profit or loss
Discount rates	9.26%	9.65%

Other comprehensive income - _2

Other comprehensive income - Items not reclassified: equity instruments (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018
Disclosure of analysis of other comprehensive income by item [line items]
Net revaluation gains (losses)	€ 597	€ 773
Fair value	121,091	126,353
Debt instruments
Disclosure of analysis of other comprehensive income by item [line items]
Fair value	116,819	122,077
Equity instruments
Disclosure of analysis of other comprehensive income by item [line items]
Fair value	2,671	€ 3,169
Domestic | SPAIN
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	20
Revaluation losses	(216)
Net revaluation gains (losses)	(196)
Fair value	417
International
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	897
Revaluation losses	(300)
Net revaluation gains (losses)	597
Fair value	2,671
International | Rest of Europe
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	160
Revaluation losses	(76)
Net revaluation gains (losses)	84
Fair value	652
International | UNITED STATES
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	9
Net revaluation gains (losses)	9
Fair value	42
International | Latin America and rest of the world
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	708
Revaluation losses	(8)
Net revaluation gains (losses)	700
Fair value	1,560
Listed
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	818
Revaluation losses	(18)
Net revaluation gains (losses)	800
Fair value	1,943
Unlisted
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	79
Revaluation losses	(282)
Net revaluation gains (losses)	(203)
Fair value	€ 728

Other comprehensive income - _3

Other comprehensive income - Items may be reclassified: foreign hedges and exchange differences (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Items that may be reclassified to profit or loss
Loss related to measurement of goodwill	€ 679	€ (105)	€ 1,627
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(20,042)	(19,741)	(12,995)
BRL
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(12,950)	(11,056)	(8,435)
MXN
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(2,312)	(2,230)	(1,908)
GBP
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(3,924)	(3,732)	(2,996)
Argentine peso
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation		(1,684)	(1,309)
Chilean peso
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(1,238)	(866)	(614)
USD
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	1,330	555	2,849
Other currencies
Items that may be reclassified to profit or loss
Reserve of hedge of net investments in foreign operations and exchange differences on translation	(948)	(728)	(582)
Goodwill.
Items that may be reclassified to profit or loss
Loss related to measurement of goodwill	€ 556	€ 1,704	€ 185

Other comprehensive income - _4

Other comprehensive income - Items may be reclassified: debt and equity instruments (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Financial assets at fair value through other comprehensive income [abstract]
Net revaluation gains/(losses)	€ 828			€ 1,253
Financial assets at fair value through comprehensive income	€ 118,420
Revaluation gains		€ 2,389	€ 2,108
Revaluation losses		(321)	(537)
Net revaluation gains/(losses)		2,068	1,571
Financial assets available-for-sale		133,271	116,774
Decrease in value of quoted equity instrument to be considered impaired (as a percent)	40.00%
Period of time of a continued fall in value of an equity instrument to be considered impaired (in months)	18 months
Impairment loss (reversal)	€ 8,986	9,259	9,626
Provision (reversal) due to modification of income statement			(25)
Debt instruments
Financial assets at fair value through other comprehensive income [abstract]
Financial assets at fair value through comprehensive income	116,819
Revaluation gains	1,184	1,460	944
Revaluation losses	(353)	(306)	(521)
Net revaluation gains/(losses)	831	1,154	423
Financial assets available-for-sale	118,420	128,481	111,287
Government debt securities and debt instruments issued by central banks | SPAIN
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	326	660	610
Revaluation losses	(3)	(25)	(26)
Net revaluation gains/(losses)	323	635	584
Financial assets available-for-sale	38,550	48,217	32,729
Government debt securities and debt instruments issued by central banks | Rest of Europe
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	373	306	50
Revaluation losses	(55)	(24)	(170)
Net revaluation gains/(losses)	318	282	(120)
Financial assets available-for-sale	17,494	20,244	16,879
Government debt securities and debt instruments issued by central banks | Latin America and rest of the world
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	448	404	167
Revaluation losses	(117)	(129)	(163)
Net revaluation gains/(losses)	331	275	4
Financial assets available-for-sale	42,599	39,132	35,996
Private-sector debt securities
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	37	90	117
Revaluation losses	(178)	(128)	(162)
Net revaluation gains/(losses)	(141)	(38)	(45)
Financial assets available-for-sale	19,777	20,888	25,683
Equity instruments
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		929	1,164
Revaluation losses		(15)	(16)
Net revaluation gains/(losses)		914	1,148
Financial assets available-for-sale		4,790	5,487		€ 4,849
Domestic | SPAIN
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		5	48
Revaluation losses		(2)	(5)
Net revaluation gains/(losses)		3	43
Financial assets available-for-sale		1,373	1,309
International | Rest of Europe
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		166	284
Revaluation losses		(2)	(4)
Net revaluation gains/(losses)		164	280
Financial assets available-for-sale		979	1,016
International | Latin America and rest of the world
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		744	811
Revaluation losses		(6)	(7)
Net revaluation gains/(losses)		738	804
Financial assets available-for-sale		1,878	2,390
International | UNITED STATES
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		14	21
Revaluation losses		(5)
Net revaluation gains/(losses)		9	21
Financial assets available-for-sale		560	772
Listed
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		828	999
Revaluation losses		(5)	(11)
Net revaluation gains/(losses)		823	988
Financial assets available-for-sale		2,900	3,200
Unlisted
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains		101	165
Revaluation losses		(10)	(5)
Net revaluation gains/(losses)		91	160
Financial assets available-for-sale		1,890	2,287
Financial assets at fair value through other comprehensive income, category
Financial assets at fair value through other comprehensive income [abstract]
Impairment loss (reversal)	1
Provision (reversal) due to modification of income statement	€ 1
Financial assets available for sale, category
Financial assets at fair value through other comprehensive income [abstract]
Impairment loss (reversal)		10	(11)
Financial assets available for sale, category | Equity instruments
Financial assets at fair value through other comprehensive income [abstract]
Provision (reversal) due to modification of income statement		€ 10	€ 14

Other comprehensive income - _5

Other comprehensive income - Items may be reclassified: investments in subsidiaries, etc. (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Items that may be reclassified to profit or loss
Balance at beginning of year	€ (15,430)	€ (8,070)
Revaluation gains/(losses)	104	(131)
Net amounts transferred to profit or loss	398	(1,716)
Balance at end of year	(15,730)	(15,430)	€ (8,070)
Equity Investments
Items that may be reclassified to profit or loss
Balance at beginning of year	(222)	(153)	(232)
Revaluation gains/(losses)	(65)	(84)	79
Net amounts transferred to profit or loss	20	15
Balance at end of year	(267)	(222)	(153)
Equity Investments | Zurich Santander Insurance America S.L.
Items that may be reclassified to profit or loss
Balance at beginning of year	(145)	(84)
Balance at end of year	€ (159)	€ (145)	€ (84)

Issued Capital - Changes (Detai

Issued Capital - Changes (Details) € / shares in Units, € in Millions	Jul. 03, 2017EUR (€)item€ / sharesshares	Dec. 31, 2018EUR (€)€ / sharesshares	Nov. 06, 2018EUR (€)shares	Jan. 02, 2018EUR (€)	Dec. 31, 2017EUR (€)shares	Nov. 01, 2017EUR (€)shares	Dec. 31, 2016EUR (€)shares	Nov. 04, 2016EUR (€)shares	Dec. 31, 2015EUR (€)shares
Issued capital abstract
Share capital (in shares) | shares		16,236,573,942			16,136,153,582		14,582,340,701		14,434,492,579
Share capital | €	€ 729	€ 8,118		€ 8,068	€ 8,068	€ 48	€ 7,291	€ 74	€ 7,217
Capital increase | €	€ 7,072		€ 50
New shares issued (in shares) | shares	1,458,232,745		100,420,360			95,580,136		147,848,122
Nominal value per share | € / shares	€ 0.50	€ 0.50
Premium per share | € / shares	4.35
Total price per share | € / shares	€ 4.85
Share premium | €	€ 6,343	€ 50,993		€ 51,053	€ 51,053		€ 44,912
Shares issued as a percentage of shared capital			0.62%			0.60%		1.02%
Number of subscription rights required for each new share | item	10

Issued Capital - Major sharehol

Issued Capital - Major shareholders (Details)	May 08, 2018	Apr. 23, 2018	Aug. 09, 2017	Dec. 31, 2018shareholdershares
Other capital disclosures
Number of shares equivalent to a Crest Depositary Interest (CDI)				1
Number of shares equivalent to an American Depositary Receipt (BDR)				1
Minimum shareholders' ownership percentage threshold for reporting				3.00%
Number of third party owners of interests held in custody which exceed the minimum shareholders' ownership percentage threshold for reporting | shareholder				0
Minimum tax haven participation threshold for reporting				1.00%
State Street Bank and Trust Company
Other capital disclosures
Shareholder ownership interest in entity (as percent)				13.09%
Bank of New York Mellon Corporation
Other capital disclosures
Shareholder ownership interest in entity (as percent)				8.85%
Chase Nominees Ltd.
Other capital disclosures
Shareholder ownership interest in entity (as percent)				6.69%
EC Nominees Limited
Other capital disclosures
Shareholder ownership interest in entity (as percent)				3.96%
BNP Paribas
Other capital disclosures
Shareholder ownership interest in entity (as percent)				3.79%
Blackrock, Inc.
Other capital disclosures
Voting rights asserted, as a percent			5.585%
Further stake held, as a percent			0.158%
Blackrock, Inc. | Minimum
Other capital disclosures
Voting rights asserted, as a percent	5.00%
Blackrock, Inc. | Maximum
Other capital disclosures
Minimum shareholders' ownership percentage threshold for reporting				3.00%
Voting rights asserted, as a percent		5.00%

Issued Capital - Other consider

Issued Capital - Other considerations (Details) - EUR (€) shares in Millions	Mar. 18, 2016	Apr. 30, 2017	Dec. 31, 2018	Apr. 07, 2017
Other considerations
Authorized additional share capital	€ 500,000,000	€ 500,000,000		€ 3,645,585,175
Authorized period in which to exercise capital increase		1 year
Limit to disapply pre-emption rights				€ 1,458,234,070
Shares owned by third parties and managed by Group management companies			63
Shares owned by third parties and managed by Group management companies as a percentage of shared capital			0.39%
Shares owned by third parties and received as security			212
Shares received as security as a percentage of shared capital			1.30%
Maximum
Other considerations
Authorized period in which to exercise capital increase	1 year

Share premium (Details)

Share premium (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Jul. 03, 2017	Dec. 31, 2016
Share Premium Abstract
Share premium	€ 50,993	€ 51,053	€ 51,053	€ 6,343	€ 44,912
Decrease in share premium related to Santander Dividendo Eleccion Scrip dividend scheme	50		48		74
Transfer of share premium to Legal reserve	€ 10		€ 154		€ 15

Accumulated retained earnings -

Accumulated retained earnings - Reserve breakdown (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reserve breakdown
Reserves of subsidiaries	€ 37,593	€ 36,862	€ 34,568
Equity Investments
Reserve breakdown
Restricted reserves	2,580	2,880	2,686
Legal reserve	1,624	1,614	1,459
Own shares	902	1,212	1,173
Revaluation reserve Royal Decree-Law 7/1996	43	43	43
Reserve for retired capital	11	11	11
Unrestricted reserves	12,100	11,368	11,285
Voluntary reserves	5,737	6,904	7,192
Consolidation reserves attributable to the Bank	6,363	4,464	4,093
Reserves of subsidiaries	37,593	36,862	34,568
Reserves of entities accounted for using the equity method	917	725	465
Accumulated retained earnings and other reserves	€ 53,190	€ 51,835	€ 49,004

Accumulated retained earnings_2

Accumulated retained earnings - Legal reserve (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Legal reserve
Percentage of annual net profit required to be transferred to the legal reserve	10.00%
Percentage of share capital required to be maintained in the legal reserve before annual transfers can be discontinued	20.00%
Minimum percentage of increased share capital required to be maintained in the legal reserve if reserves are used to increase capital	10.00%
Transfer of share premium to Legal reserve	€ 10	€ 154	€ 15

Accumulated retained earnings_3

Accumulated retained earnings - Reserves of subsidiaries (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reserve breakdown
Reserves of subsidiaries	€ 37,593	€ 36,862	€ 34,568
Restricted portion of Reserves of subsidiaries	2,964	2,777	2,730
Banco Santander (Brasil) S.A
Reserve breakdown
Reserves of subsidiaries	10,755	9,874	8,993
Grupo Santander UK
Reserve breakdown
Reserves of subsidiaries	8,207	7,724	6,887
Santander Holding USA, Inc.
Reserve breakdown
Reserves of subsidiaries	4,260	4,150	4,091
Banco Santander (Mexico), S.A., Institucion De Banca Multiple, Grupo Financiero Santander Mexico [Member]
Reserve breakdown
Reserves of subsidiaries	3,436	3,229	3,255
Banco Santander - Chile
Reserve breakdown
Reserves of subsidiaries	2,963	2,764	2,630
Santander Consumer Finance, S.A.
Reserve breakdown
Reserves of subsidiaries	2,841	2,465	2,027
Banco Santander Totta SA
Reserve breakdown
Reserves of subsidiaries	2,729	2,821	2,593
Santander Bank Polska SA [Member]
Reserve breakdown
Reserves of subsidiaries	1,387	1,093	967
Santander Seguros y Reaseguros, Compania Aseguradora, S.A.
Reserve breakdown
Reserves of subsidiaries	714	638	824
Banco Santander (Suisse), S.A.
Reserve breakdown
Reserves of subsidiaries	369	381	354
Santander Investment, S.A.
Reserve breakdown
Reserves of subsidiaries	208	202	349
Banco Santander Rio, S.A.
Reserve breakdown
Reserves of subsidiaries	(82)	1,639	1,326
Cartera Mobiliaria, S.A. SICAV
Reserve breakdown
Reserves of subsidiaries			377
Exchange differences, consolidation adjustments and other companies
Reserve breakdown
Reserves of subsidiaries	€ (194)	€ (118)	€ (105)

Other equity instruments and _2

Other equity instruments and own shares (Details) - EUR (€) € / shares in Units, € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Sep. 08, 2017
Other equity instruments and own shares
Fidelity Bonds, nominal value	€ 565				€ 981
Fidelity Bonds, market value	565	€ 525		€ 525	686
Fidelity Bonds under power of third parties					€ 549
Other equity interest	€ 234	€ 216	€ 240	€ 216
Bank's shares owned by consolidated companies as percentage of issued shared capital	0.075%	0.024%	0.01%
Average purchase price of Bank shares	€ 4.96
Average selling price of Bank shares	€ 4.98
Net effect on equity from purchase and sale of Bank shares	€ 0	€ 26	€ 15

Memorandum items - Commitments

Memorandum items - Commitments and contingencies (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Contingent Liabilities And Contingent Commitments [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	€ 304,195
Loan commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	218,083	€ 207,671	€ 202,097
Financial Guarantees
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	11,723	14,499	17,244
Bank Sureties Granted [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	11,557	14,287	17,244
Credit derivatives sold
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	166	212
Other Commitments [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	74,389	64,917	57,055
Other Granted Guarantees [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	35,154	30,273	23,684
Other contingent commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	39,235	34,644	33,371
Financial instruments credit-impaired
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts		1,327	1,078
Financial instruments credit-impaired | Loan commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	298	81	8
Financial instruments credit-impaired | Financial Guarantees
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	181	254	1,070
Financial instruments credit-impaired | Other Commitments [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	983	992
Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	1,462
Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	5,324
Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	297,409
Provision for contingent liabilities and commitments
Disclosure of contingent liabilities [line items]
Other provisions		€ 617	€ 459
Provision for contingent liabilities and commitments | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of contingent liabilities [line items]
Other provisions	265
Provision for contingent liabilities and commitments | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of contingent liabilities [line items]
Other provisions	132
Provision for contingent liabilities and commitments | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of contingent liabilities [line items]
Other provisions	€ 382

Memorandum items - Other (Detai

Memorandum items - Other (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of unconsolidated structured entities [line items]
Off-balance sheet assets managed by the entity and by joint ventures	€ 157,855	€ 166,574	€ 159,260
Non-managed marketed funds	42,211	41,398	23,247
Third party debt securities and equity instruments held in custody	940,650	997,061	965,648
Investment fund units and shares
Disclosure of unconsolidated structured entities [line items]
Off-balance sheet assets managed by the entity and by joint ventures	127,564	135,749	129,930
Pension funds
Disclosure of unconsolidated structured entities [line items]
Off-balance sheet assets managed by the entity and by joint ventures	11,160	11,566	11,298
Assets under management
Disclosure of unconsolidated structured entities [line items]
Off-balance sheet assets managed by the entity and by joint ventures	€ 19,131	€ 19,259	€ 18,032

Hedging Derivatives - Hedging i

Hedging Derivatives - Hedging instruments (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 318,807
Carrying amount - Assets	8,607
Carrying amount - Liabilities	(6,363)
Change in fair value used for calculating hedge ineffectiveness	67
Fair value hedges
Disclosure of detailed information about hedged items [line items]
Notional amount	178,719
Carrying amount - Assets	3,451
Carrying amount - Liabilities	(5,114)
Change in fair value used for calculating hedge ineffectiveness	96
Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	163,241
Carrying amount - Assets	2,648
Carrying amount - Liabilities	(4,616)
Change in fair value used for calculating hedge ineffectiveness	56
Fair value hedges | Interest rate risk | Equity Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	109
Carrying amount - Liabilities	(2)
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	7,702
Change in fair value used for calculating hedge ineffectiveness	(126)
Fair value hedges | Interest rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	129,217
Carrying amount - Assets	2,345
Carrying amount - Liabilities	(4,168)
Change in fair value used for calculating hedge ineffectiveness	321
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	19,579
Carrying amount - Assets	170
Carrying amount - Liabilities	(250)
Change in fair value used for calculating hedge ineffectiveness	(32)
Fair value hedges | Interest rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	4,957
Carrying amount - Assets	121
Carrying amount - Liabilities	(45)
Change in fair value used for calculating hedge ineffectiveness	(17)
Fair value hedges | Interest rate risk | Inflation Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used for calculating hedge ineffectiveness	9
Fair value hedges | Interest rate risk | Swaption Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	51
Carrying amount - Assets	6
Carrying amount - Liabilities	(6)
Fair value hedges | Interest rate risk | Collar Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	15
Carrying amount - Assets	1
Fair value hedges | Interest rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	1,611
Carrying amount - Assets	5
Carrying amount - Liabilities	(145)
Change in fair value used for calculating hedge ineffectiveness	(99)
Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	3,019
Carrying amount - Assets	11
Carrying amount - Liabilities	(1)
Change in fair value used for calculating hedge ineffectiveness	3
Fair value hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	3,019
Carrying amount - Assets	11
Carrying amount - Liabilities	(1)
Change in fair value used for calculating hedge ineffectiveness	3
Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	12,237
Carrying amount - Assets	792
Carrying amount - Liabilities	(493)
Change in fair value used for calculating hedge ineffectiveness	42
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	3,022
Carrying amount - Assets	143
Carrying amount - Liabilities	(20)
Change in fair value used for calculating hedge ineffectiveness	(15)
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	20
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	9,195
Carrying amount - Assets	649
Carrying amount - Liabilities	(473)
Change in fair value used for calculating hedge ineffectiveness	57
Fair value hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	168
Carrying amount - Liabilities	(4)
Change in fair value used for calculating hedge ineffectiveness	(5)
Fair value hedges | Inflation Risk [Member] | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	64
Carrying amount - Liabilities	(3)
Change in fair value used for calculating hedge ineffectiveness	(3)
Fair value hedges | Inflation Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	104
Carrying amount - Liabilities	(1)
Change in fair value used for calculating hedge ineffectiveness	(2)
Fair value hedges | Credit risk
Disclosure of detailed information about hedged items [line items]
Notional amount	54
Cash flow hedges
Disclosure of detailed information about hedged items [line items]
Notional amount	118,400
Carrying amount - Assets	4,865
Carrying amount - Liabilities	(976)
Change in fair value used for calculating hedge ineffectiveness	(28)
Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	38,229
Carrying amount - Assets	307
Carrying amount - Liabilities	(229)
Change in fair value used for calculating hedge ineffectiveness	203
Cash flow hedges | Interest rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	127
Change in fair value used for calculating hedge ineffectiveness	29
Cash flow hedges | Interest rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	33,956
Carrying amount - Assets	240
Carrying amount - Liabilities	(202)
Change in fair value used for calculating hedge ineffectiveness	159
Cash flow hedges | Interest rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	2,350
Carrying amount - Assets	57
Carrying amount - Liabilities	(26)
Change in fair value used for calculating hedge ineffectiveness	11
Cash flow hedges | Interest rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	1,747
Carrying amount - Assets	10
Change in fair value used for calculating hedge ineffectiveness	5
Cash flow hedges | Interest rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	49
Carrying amount - Liabilities	(1)
Change in fair value used for calculating hedge ineffectiveness	(1)
Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	38,457
Carrying amount - Assets	971
Carrying amount - Liabilities	(568)
Change in fair value used for calculating hedge ineffectiveness	(878)
Cash flow hedges | Exchange rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	4,946
Change in fair value used for calculating hedge ineffectiveness	(12)
Cash flow hedges | Exchange rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	1,055
Carrying amount - Assets	10
Carrying amount - Liabilities	(5)
Change in fair value used for calculating hedge ineffectiveness	8
Cash flow hedges | Exchange rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	23,904
Carrying amount - Assets	775
Carrying amount - Liabilities	(548)
Change in fair value used for calculating hedge ineffectiveness	(142)
Cash flow hedges | Exchange rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	314
Cash flow hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	3,283
Carrying amount - Assets	186
Carrying amount - Liabilities	(15)
Change in fair value used for calculating hedge ineffectiveness	(36)
Cash flow hedges | Exchange rate risk | Foreign Exchange Future and C/V Term FV Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	4,955
Change in fair value used for calculating hedge ineffectiveness	(697)
Cash flow hedges | Exchange rate risk | Deposits Contracts [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value used for calculating hedge ineffectiveness	1
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	34,383
Carrying amount - Assets	3,542
Carrying amount - Liabilities	(124)
Change in fair value used for calculating hedge ineffectiveness	665
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	12,572
Carrying amount - Assets	20
Carrying amount - Liabilities	(97)
Change in fair value used for calculating hedge ineffectiveness	(7)
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	21,811
Carrying amount - Assets	3,522
Carrying amount - Liabilities	(27)
Change in fair value used for calculating hedge ineffectiveness	672
Cash flow hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	6,318
Carrying amount - Assets	45
Carrying amount - Liabilities	(30)
Change in fair value used for calculating hedge ineffectiveness	11
Cash flow hedges | Inflation Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	5,904
Carrying amount - Assets	45
Carrying amount - Liabilities	(21)
Change in fair value used for calculating hedge ineffectiveness	12
Cash flow hedges | Inflation Risk [Member] | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	414
Carrying amount - Liabilities	(9)
Change in fair value used for calculating hedge ineffectiveness	(1)
Cash flow hedges | Market value of equity
Disclosure of detailed information about hedged items [line items]
Notional amount	77
Carrying amount - Liabilities	(4)
Change in fair value used for calculating hedge ineffectiveness	(8)
Cash flow hedges | Market value of equity | Option contract [member]
Disclosure of detailed information about hedged items [line items]
Notional amount	77
Carrying amount - Liabilities	(4)
Change in fair value used for calculating hedge ineffectiveness	(8)
Cash flow hedges | Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	936
Carrying amount - Liabilities	(21)
Change in fair value used for calculating hedge ineffectiveness	(21)
Cash flow hedges | Other Risk [Member] | Foreign Exchange Future And C/V Term RF [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	936
Carrying amount - Liabilities	(21)
Change in fair value used for calculating hedge ineffectiveness	(21)
Hedges of net investment in foreign operations
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688
Carrying amount - Assets	291
Carrying amount - Liabilities	(273)
Change in fair value used for calculating hedge ineffectiveness	(1)
Hedges of net investment in foreign operations | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688
Carrying amount - Assets	291
Carrying amount - Liabilities	(273)
Change in fair value used for calculating hedge ineffectiveness	(1)
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688
Carrying amount - Assets	291
Carrying amount - Liabilities	(273)
Change in fair value used for calculating hedge ineffectiveness	€ (1)

Hedging Derivatives - Maturity

Hedging Derivatives - Maturity profile (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)€ / $	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)R$ / $	Dec. 31, 2018EUR (€)€ / £	Dec. 31, 2018EUR (€)kr / €	Dec. 31, 2018EUR (€)kr / €	Dec. 31, 2018EUR (€)SFr / €	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)£ / ¥	Dec. 31, 2018EUR (€)$ / $	Dec. 31, 2018EUR (€)kr / €	Dec. 31, 2018EUR (€)¥ / €	Dec. 31, 2018EUR (€)Kč / €	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)£ / $	Dec. 31, 2018EUR (€) / $	Dec. 31, 2018EUR (€)$ / $	Dec. 31, 2018EUR (€)£ / $	Dec. 31, 2018EUR (€)€ / $	Dec. 31, 2018EUR (€)$ / R$	Dec. 31, 2018EUR (€)¥ / €	Dec. 31, 2018EUR (€)zł / €	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)R$ / €	Dec. 31, 2018EUR (€)£ / €	Dec. 31, 2018EUR (€)$ / €	Dec. 31, 2018EUR (€)$ / €
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807	€ 318,807
1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616	28,616
3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760	25,760
3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794	51,794
Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777	150,777
More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860	61,860
Fair value hedges
Disclosure of detailed information about hedged items [line items]
Notional amount	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719	178,719
Fair value hedges | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377	9,377
Fair value hedges | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989	17,989
Fair value hedges | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773	23,773
Fair value hedges | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541	78,541
Fair value hedges | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039	49,039
Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241	163,241
Fair value hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436	8,436
Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519	12,519
Fair value hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987	21,987
Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989	73,989
Fair value hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310	46,310
Fair value hedges | Interest rate risk | Equity Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109	109
Fair value hedges | Interest rate risk | Equity Swap Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Fair value hedges | Interest rate risk | Equity Swap Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46	46
Fair value hedges | Interest rate risk | Equity Swap Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702	7,702
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668	668
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012	2,012
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981	981
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650	2,650
Fair value hedges | Interest rate risk | Future Interest Rate Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391	1,391
Fair value hedges | Interest rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217	129,217
Fair value hedges | Interest rate risk | Interest rate swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672	7,672
Fair value hedges | Interest rate risk | Interest rate swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213	10,213
Fair value hedges | Interest rate risk | Interest rate swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423	18,423
Fair value hedges | Interest rate risk | Interest rate swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502	60,502
Fair value hedges | Interest rate risk | Interest rate swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407	32,407
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579	19,579
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96	96
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267	267
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823	1,823
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967	6,967
Fair value hedges | Interest rate risk | Call Money Swap Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426	10,426
Fair value hedges | Interest rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957	4,957
Fair value hedges | Interest rate risk | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714	714
Fair value hedges | Interest rate risk | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368
Fair value hedges | Interest rate risk | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875	1,875
Fair value hedges | Interest rate risk | Swaption Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51
Fair value hedges | Interest rate risk | Swaption Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51	51
Fair value hedges | Interest rate risk | Collar Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Fair value hedges | Interest rate risk | Collar Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Fair value hedges | Interest rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611	1,611
Fair value hedges | Interest rate risk | Floor Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415
Fair value hedges | Interest rate risk | Floor Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196	196
Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019
Fair value hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Fair value hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855
Fair value hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147
Fair value hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019	3,019
Fair value hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Fair value hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855	1,855
Fair value hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147	1,147
Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237	12,237
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924	924
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615	3,615
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639	639
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503	4,503
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556	2,556
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022	3,022
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445	445
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462	1,462
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35	35
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710	710
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370	370
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Call Money Swap Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195	9,195
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479	479
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153	2,153
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604	604
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793	3,793
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166	2,166
Fair value hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168
Fair value hedges | Inflation Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168	168
Fair value hedges | Inflation Risk [Member] | Call Money Swap Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64
Fair value hedges | Inflation Risk [Member] | Call Money Swap Contract [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64	64
Fair value hedges | Inflation Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104
Fair value hedges | Inflation Risk [Member] | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104	104
Fair value hedges | Credit risk
Disclosure of detailed information about hedged items [line items]
Notional amount	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54
Fair value hedges | Credit risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49
Fair value hedges | Credit risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
Fair value hedges | Credit risk | Credit default swap
Disclosure of detailed information about hedged items [line items]
Notional amount	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54	54
Fair value hedges | Credit risk | Credit default swap | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49
Fair value hedges | Credit risk | Credit default swap | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
Cash flow hedges
Disclosure of detailed information about hedged items [line items]
Notional amount	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400	118,400
Cash flow hedges | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684	18,684
Cash flow hedges | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994	6,994
Cash flow hedges | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954	16,954
Cash flow hedges | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947	62,947
Cash flow hedges | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821	12,821
Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229	38,229
Cash flow hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079	2,079
Cash flow hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607	2,607
Cash flow hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971	6,971
Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020	26,020
Cash flow hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552	552
Cash flow hedges | Interest rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127	127
Cash flow hedges | Interest rate risk | Future Interest Rate Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
Cash flow hedges | Interest rate risk | Future Interest Rate Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125	125
Cash flow hedges | Interest rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956	33,956
Cash flow hedges | Interest rate risk | Interest rate swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028	2,028
Cash flow hedges | Interest rate risk | Interest rate swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161	2,161
Cash flow hedges | Interest rate risk | Interest rate swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957	5,957
Cash flow hedges | Interest rate risk | Interest rate swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593	23,593
Cash flow hedges | Interest rate risk | Interest rate swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217	217
Cash flow hedges | Interest rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350	2,350
Cash flow hedges | Interest rate risk | Currency swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446	446
Cash flow hedges | Interest rate risk | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839	839
Cash flow hedges | Interest rate risk | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730	730
Cash flow hedges | Interest rate risk | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335	335
Cash flow hedges | Interest rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747	1,747
Cash flow hedges | Interest rate risk | Floor Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175	175
Cash flow hedges | Interest rate risk | Floor Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572	1,572
Cash flow hedges | Interest rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49
Cash flow hedges | Interest rate risk | Foreign Exchange Forward Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49
Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457	38,457
Cash flow hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166	16,166
Cash flow hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478
Cash flow hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896	5,896
Cash flow hedges | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984	11,984
Cash flow hedges | Exchange rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933
Cash flow hedges | Exchange rate risk | Future Interest Rate Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946
Cash flow hedges | Exchange rate risk | Future Interest Rate Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946	4,946
Cash flow hedges | Exchange rate risk | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055
Cash flow hedges | Exchange rate risk | Interest rate swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055	1,055
Cash flow hedges | Exchange rate risk | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904	23,904
Cash flow hedges | Exchange rate risk | Currency swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842	4,842
Cash flow hedges | Exchange rate risk | Currency swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478	3,478
Cash flow hedges | Exchange rate risk | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535	5,535
Cash flow hedges | Exchange rate risk | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116	9,116
Cash flow hedges | Exchange rate risk | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933	933
Cash flow hedges | Exchange rate risk | Floor Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314
Cash flow hedges | Exchange rate risk | Floor Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314	314
Cash flow hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283	3,283
Cash flow hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423	1,423
Cash flow hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47
Cash flow hedges | Exchange rate risk | Foreign Exchange Forward Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813	1,813
Cash flow hedges | Exchange rate risk | Foreign Exchange Future and C/V Term FV Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955
Cash flow hedges | Exchange rate risk | Foreign Exchange Future and C/V Term FV Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955	4,955
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383	34,383
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921	2,921
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930	21,930
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524	9,524
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572	12,572
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898	898
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456	8,456
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Interest rate swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210	3,210
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811	21,811
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023	2,023
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474	13,474
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314	6,314
Cash flow hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318	6,318
Cash flow hedges | Inflation Risk [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439
Cash flow hedges | Inflation Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524	524
Cash flow hedges | Inflation Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566	566
Cash flow hedges | Inflation Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977	2,977
Cash flow hedges | Inflation Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812
Cash flow hedges | Inflation Risk [Member] | Currency swaps
Disclosure of detailed information about hedged items [line items]
Notional amount	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904	5,904
Cash flow hedges | Inflation Risk [Member] | Currency swaps | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439	439
Cash flow hedges | Inflation Risk [Member] | Currency swaps | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403	403
Cash flow hedges | Inflation Risk [Member] | Currency swaps | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410	410
Cash flow hedges | Inflation Risk [Member] | Currency swaps | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840	2,840
Cash flow hedges | Inflation Risk [Member] | Currency swaps | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812	1,812
Cash flow hedges | Inflation Risk [Member] | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414	414
Cash flow hedges | Inflation Risk [Member] | Foreign Exchange Forward Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121	121
Cash flow hedges | Inflation Risk [Member] | Foreign Exchange Forward Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156	156
Cash flow hedges | Inflation Risk [Member] | Foreign Exchange Forward Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137	137
Cash flow hedges | Market value of equity
Disclosure of detailed information about hedged items [line items]
Notional amount	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77
Cash flow hedges | Market value of equity | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41
Cash flow hedges | Market value of equity | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36
Cash flow hedges | Market value of equity | Option contract [member]
Disclosure of detailed information about hedged items [line items]
Notional amount	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77	77
Cash flow hedges | Market value of equity | Option contract [member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41
Cash flow hedges | Market value of equity | Option contract [member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36
Cash flow hedges | Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936
Cash flow hedges | Other Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377
Cash flow hedges | Other Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559
Cash flow hedges | Other Risk [Member] | Foreign Exchange Future And C/V Term RF [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936	936
Cash flow hedges | Other Risk [Member] | Foreign Exchange Future And C/V Term RF [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377	377
Cash flow hedges | Other Risk [Member] | Foreign Exchange Future And C/V Term RF [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559	559
Hedges of net investment in foreign operations
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688
Hedges of net investment in foreign operations | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555
Hedges of net investment in foreign operations | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777
Hedges of net investment in foreign operations | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067
Hedges of net investment in foreign operations | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289
Hedges of net investment in foreign operations | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688
Hedges of net investment in foreign operations | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555
Hedges of net investment in foreign operations | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777
Hedges of net investment in foreign operations | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067
Hedges of net investment in foreign operations | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688	21,688
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555	555
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777	777
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067	11,067
Hedges of net investment in foreign operations | Exchange rate risk | Foreign Exchange Forward Contract [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289
Grupo Santander UK | Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288	94,288
Grupo Santander UK | Fair value hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888	€ 6,888
Grupo Santander UK | Fair value hedges | Interest rate risk | 1 month | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%	0.633%
Grupo Santander UK | Fair value hedges | Interest rate risk | 1 month | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)	(0.223%)
Grupo Santander UK | Fair value hedges | Interest rate risk | 1 month | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%	1.513%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403	€ 9,403
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 months | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%	0.788%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%	0.67%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%	1.314%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333	€ 16,333
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 to 12 months | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%	1.057%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 to 12 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%	0.911%
Grupo Santander UK | Fair value hedges | Interest rate risk | 3 to 12 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%	1.337%
Grupo Santander UK | Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166	€ 44,166
Grupo Santander UK | Fair value hedges | Interest rate risk | Between one and five years | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%	1.586%
Grupo Santander UK | Fair value hedges | Interest rate risk | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%	1.085%
Grupo Santander UK | Fair value hedges | Interest rate risk | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%	2.684%
Grupo Santander UK | Fair value hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498	€ 17,498
Grupo Santander UK | Fair value hedges | Interest rate risk | More than five years | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%	2.849%
Grupo Santander UK | Fair value hedges | Interest rate risk | More than five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%	1.261%
Grupo Santander UK | Fair value hedges | Interest rate risk | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%	2.179%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687	€ 5,687
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877	€ 877
Average exchange rate | £ / $																1.580
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 1 month | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%	3.615%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894	€ 2,894
Average exchange rate | £ / $																1.332
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331	€ 1,331
Average exchange rate																1.511										1.183
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%	3.888%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%	2.375%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585	€ 585
Average exchange rate | £ / €																										1.168
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%	3.923%
Grupo Santander UK | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%	7.95%
Grupo Santander UK | Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608	€ 7,608
Grupo Santander UK | Cash flow hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917	€ 1,917
Average fixed interest rate	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%	0.726%
Grupo Santander UK | Cash flow hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225	€ 2,225
Average fixed interest rate	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%	0.733%
Grupo Santander UK | Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466	€ 3,466
Average fixed interest rate	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%	1.334%
Grupo Santander UK | Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673	€ 17,673
Grupo Santander UK | Cash flow hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	€ 4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378	4,378
Average exchange rate | £ / $																1.304
Grupo Santander UK | Cash flow hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	€ 2,853	2,853	2,853	2,853	2,853	2,853	€ 2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853	2,853
Average exchange rate										147.215						1.307
Grupo Santander UK | Cash flow hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	3,310	3,310	3,310	3,310	3,310	3,310	3,310	3,310	3,310	€ 3,310	3,310	3,310	3,310	3,310	3,310	€ 3,310	3,310	3,310	3,310	3,310	3,310	3,310	3,310	3,310	3,310	€ 3,310	3,310	3,310
Average exchange rate										146.372						1.310										1.280
Grupo Santander UK | Cash flow hedges | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	7,132	7,132	7,132	7,132	7,132	7,132	7,132	7,132	7,132	€ 7,132	7,132	7,132	7,132	7,132	7,132	€ 7,132	7,132	7,132	7,132	7,132	7,132	7,132	7,132	7,132	7,132	€ 7,132	7,132	7,132
Average exchange rate										145.319						1.305										1.135
Grupo Santander UK | Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	33,642	33,642	33,642	33,642	33,642	33,642	33,642	33,642	33,642	€ 33,642	33,642	33,642	33,642	33,642	33,642	€ 33,642	33,642	33,642	33,642	33,642	33,642	33,642	33,642	33,642	33,642	€ 33,642	33,642	33,642
Grupo Santander UK | Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859	€ 2,859
Average fixed interest rate	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%	2.34%
Average exchange rate																1.633										1.252
Grupo Santander UK | Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288	€ 21,288
Average fixed interest rate	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%	2.66%
Average exchange rate																1.545										1.271
Grupo Santander UK | Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495	€ 9,495
Average fixed interest rate	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%	2.90%
Average exchange rate																1.511										1.217
Banco Santander S.A. | Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602	€ 36,602
Banco Santander S.A. | Fair value hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500	€ 500
Banco Santander S.A. | Fair value hedges | Interest rate risk | 1 month | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%	3.75%
Banco Santander S.A. | Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665	€ 665
Banco Santander S.A. | Fair value hedges | Interest rate risk | 3 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%	0.63%
Banco Santander S.A. | Fair value hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425	€ 425
Banco Santander S.A. | Fair value hedges | Interest rate risk | 3 to 12 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%	1.38%
Banco Santander S.A. | Fair value hedges | Interest rate risk | 3 to 12 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%	2.06%
Banco Santander S.A. | Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987	€ 12,987
Banco Santander S.A. | Fair value hedges | Interest rate risk | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%	3.43%
Banco Santander S.A. | Fair value hedges | Interest rate risk | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%	1.81%
Banco Santander S.A. | Fair value hedges | Interest rate risk | Between one and five years | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%	0.76%
Banco Santander S.A. | Fair value hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030	€ 22,030
Banco Santander S.A. | Fair value hedges | Interest rate risk | More than five years | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%	7.08%
Banco Santander S.A. | Fair value hedges | Interest rate risk | More than five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%	4.11%
Banco Santander S.A. | Fair value hedges | Interest rate risk | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%	3.20%
Banco Santander S.A. | Fair value hedges | Interest rate risk | More than five years | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%	1.04%
Banco Santander S.A. | Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596	€ 2,596
Banco Santander S.A. | Fair value hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825	1,825
Banco Santander S.A. | Fair value hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771	771
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656	3,656
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 1 month | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%	6.13%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461	€ 461
Average exchange rate					1.145						0.0003
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%	6.71%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120	€ 120
Average exchange rate	0.0003										0.0003										0.269
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%	7.54%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085	€ 2,085
Average exchange rate			8.718										132.014	25.407	1.499									14.696
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%	9.47%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | AUD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%	4.00%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | CZK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%	0.86%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | HKD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%	2.52%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | JPY
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%	0.64%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951	€ 951
Average exchange rate											0.0003	9.606	125.883	26.030	1.499
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | AUD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%	4.80%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | JPY
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%	1.28%
Banco Santander S.A. | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | NOK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%	3.61%
Banco Santander S.A. | Fair value hedges | Credit risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54	€ 54
Banco Santander S.A. | Fair value hedges | Credit risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49	49
Banco Santander S.A. | Fair value hedges | Credit risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
Banco Santander S.A. | Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092	8,092
Banco Santander S.A. | Cash flow hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942	1,942
Banco Santander S.A. | Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130	€ 6,130
Banco Santander S.A. | Cash flow hedges | Interest rate risk | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%	0.51%
Banco Santander S.A. | Cash flow hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20	€ 20
Banco Santander S.A. | Cash flow hedges | Interest rate risk | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%
Banco Santander S.A. | Hedges of net investment in foreign operations
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746	€ 20,746
Banco Santander S.A. | Hedges of net investment in foreign operations | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	373	€ 373	€ 373	373	373	373
Average exchange rate																								22.98	4.46
Banco Santander S.A. | Hedges of net investment in foreign operations | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	497	€ 497	€ 497	€ 497	€ 497	€ 497
Average exchange rate																										0.91	3,728.01	766.01
Banco Santander S.A. | Hedges of net investment in foreign operations | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	10,587	€ 10,587	€ 10,587	€ 10,587	€ 10,587	€ 10,587	€ 10,587	€ 10,587
Average exchange rate																						8.14	4.38	24.51	4.46	0.89	3,685.80	768.25
Banco Santander S.A. | Hedges of net investment in foreign operations | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	9,289	€ 9,289	€ 9,289	€ 9,289	€ 9,289	€ 9,289	€ 9,289	€ 9,289
Average exchange rate																							4.26	24.50	4.73			795.10
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	11,359	€ 11,359	€ 11,359	€ 11,359	11,359	11,359	€ 11,359
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253	€ 253
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 1 month | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)	(0.197%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 1 month | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)	(0.659%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672	€ 672
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)	(0.125%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 months | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)	(0.696%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488	€ 3,488
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 to 12 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)	(0.036%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | 3 to 12 months | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)	(0.679%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883	€ 6,883
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)	(0.065%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | Between one and five years | CHF
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)	(0.561%)
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63	€ 63
Santander Consumer Group [Member] | Fair value hedges | Interest rate risk | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)	(0.113%)
Santander Consumer Group [Member] | Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423
Santander Consumer Group [Member] | Fair value hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	17	17	17	17	17	17	€ 17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Average exchange rate | kr / €							134.135
Santander Consumer Group [Member] | Fair value hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	30	30	30	30	30	30	€ 30	€ 30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30
Average exchange rate | SFr / €								878.624
Santander Consumer Group [Member] | Fair value hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	376	376	376	376	376	376	€ 376	€ 376	376	376	376	€ 376	376	376	376	376	376	376	376	376	376	376	376	376	376	376	376	376
Average exchange rate							134.109	887.218				103.232
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	1,027	1,027	1,027	1,027	1,027	1,027	€ 1,027	€ 1,027	1,027	1,027	1,027	€ 1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027	1,027
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240	€ 240
Average exchange rate | kr / €							0.134
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 months | DKK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%	0.002%
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339	€ 339
Average exchange rate						0.104	0.134
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months | SEK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%	0.008%
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months | DKK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%	0.003%
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448	€ 448
Average exchange rate | kr / €							0.134
Santander Consumer Group [Member] | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | DKK
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%	0.004%
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920	€ 920
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85	€ 85
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 1 month | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99	€ 99
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 3 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313	€ 313
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | 3 to 12 months | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423	€ 423
Santander Consumer Group [Member] | Cash flow hedges | Interest rate risk | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%	0.183%
Santander Consumer Group [Member] | Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325	€ 4,325
Santander Consumer Group [Member] | Cash flow hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	339	339	339	339	339	€ 339	€ 339	€ 339	€ 339	339	339	€ 339	339	339	339	339	339	339	339	339	339	339	339	339	339	339	339	339
Average exchange rate						0.101	0.134	0.896	0.654			0.108
Santander Consumer Group [Member] | Cash flow hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	557	557	557	557	557	€ 557	€ 557	€ 557	€ 557	557	557	€ 557	557	557	557	557	557	557	557	557	557	557	557	557	557	557	557	557
Average exchange rate						0.098	0.134	0.859	0.658			0.108
Santander Consumer Group [Member] | Cash flow hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	2,368	€ 2,368	2,368	2,368	2,368	€ 2,368	€ 2,368	€ 2,368	€ 2,368	2,368	2,368	€ 2,368	€ 2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	2,368	€ 2,368	2,368	2,368	2,368	2,368	2,368
Average exchange rate		0.897				0.099	0.134	0.870	0.652			0.108	0.008										0.234
Santander Consumer Group [Member] | Cash flow hedges | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	1,061	€ 1,061	1,061	1,061	1,061	€ 1,061	€ 1,061	€ 1,061	€ 1,061	1,061	1,061	€ 1,061	€ 1,061	1,061	1,061	1,061	1,061	1,061	1,061	1,061	1,061	1,061	€ 1,061	1,061	1,061	1,061	1,061	1,061
Average exchange rate						0.099		0.900	0.656			0.108	0.008										0.233
Santander Consumer Group [Member] | Hedges of net investment in foreign operations | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	943	943	943	943	943	€ 943	943	€ 943	€ 943	943	943	€ 943	€ 943	943	943	943	943	943	943	943	943	943	€ 943	943	943	943	943	943
Santander Consumer Group [Member] | Hedges of net investment in foreign operations | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	181	181	181	181	181	181	181	181	181	181	181	€ 181	181	181	181	181	181	181	181	181	181	181	181	181	181	181	181	181
Average exchange rate | kr / €												103.751
Santander Consumer Group [Member] | Hedges of net investment in foreign operations | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	282	282	282	282	282	282	282	282	282	282	282	€ 282	282	282	282	282	282	282	282	282	282	282	282	282	282	282	282	282
Average exchange rate | kr / €												103.538
Santander Consumer Group [Member] | Hedges of net investment in foreign operations | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	480	480	480	480	480	480	480	480	480	480	480	€ 480	480	480	480	480	480	480	480	480	480	€ 480	480	480	480	480	480	480
Average exchange rate												102.963										121.796
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	427	427	427	427	427	427	427	427	427	427	427	€ 427	427	427	427	427	427	427	427	427	427	€ 427	427	427	427	427	427	427
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1	€ 1
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | 3 months | MXN
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%	5.18%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346	€ 346
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | 3 to 12 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | 3 to 12 months | MXN
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%	6.907%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80	€ 80
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%	1.465%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest rate risk | Between one and five years | MXN
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%	5.593%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332	€ 1,332
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41	€ 41
Average exchange rate																	5.059	13.920
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | 3 to 12 months | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282	€ 282
Average exchange rate																	5.059	13.920	24.870	20.470
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%	3.98%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Between one and five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%	2.42%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009	€ 1,009
Average exchange rate																	5.059	18.390	25.310	21.890
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | GBP
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%	6.75%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | USD
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%	4.125%
Banco Santander S.A. (Mexico) | Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | More than five years | EUR
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%	2.75%
Banco Santander S.A. (Mexico) | Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178
Banco Santander S.A. (Mexico) | Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178	€ 178
Banco Santander S.A. (Mexico) | Cash flow hedges | Interest rate risk | Between one and five years | MXN
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%	7.258%
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337	€ 4,337
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	1,415	1,415	1,415	€ 1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	€ 1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415	1,415
Average exchange rate				5.863														18.729
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	44	44	44	€ 44	44	44	44	44	44	44	44	44	44	44	44	44	44	€ 44	44	44	44	44	44	44	44	44	44	44
Average exchange rate | $ / $																		20.289
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	56	56	56	€ 56	56	56	56	56	56	56	56	56	56	56	56	56	56	€ 56	56	€ 56	56	56	56	56	56	56	56	56
Average exchange rate				5.732														17.918		16.679
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	2,719	2,719	2,719	€ 2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	€ 2,719	€ 2,719	€ 2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719	2,719
Average exchange rate				5.736														16.443	23.127	18.932
Banco Santander S.A. (Mexico) | Cash flow hedges | Exchange rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	103	103	103	€ 103	103	103	103	103	103	103	103	103	103	103	103	103	103	€ 103	€ 103	€ 103	103	103	103	103	103	103	103	103
Average exchange rate																		18.508	25.947	18.688
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	€ 7,620	€ 7,620	€ 7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620	7,620
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668	€ 668
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | 1 month | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%	9.50%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045	€ 2,045
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | 3 months | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%	6.967%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | 3 to 12 months | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%	6.937%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529	€ 3,529
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | Between one and five years | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%	10.055%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378	€ 1,378
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Interest rate risk | More than five years | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%	10.03%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411	€ 411
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	€ 6	6	6	6	6	6	6	6
Average exchange rate | $ / R$																					3.247
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	€ 15	15	15	15	15	15	15	15
Average exchange rate | $ / R$																					3.303
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	€ 36	36	36	36	36	36	36	36
Average exchange rate | $ / R$																					3.551
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	316	€ 316	316	316	316	316	316	316	316
Average exchange rate | $ / R$																					3.642
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Fair value hedges | Exchange rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	38	€ 38	38	38	38	38	38	38	38
Average exchange rate | $ / R$																					3.265
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023	€ 10,023	10,023	10,023	10,023	10,023	10,023	10,023	10,023
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 1 month
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877	€ 3,877
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 1 month | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997	€ 2,997
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 3 months | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030	€ 3,030
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | 3 to 12 months | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | Between one and five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119	€ 119
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Interest rate risk | Between one and five years | BRL
Disclosure of detailed information about hedged items [line items]
Average fixed interest rate	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%	6.50%
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272	€ 272
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Exchange rate risk | 3 months
Disclosure of detailed information about hedged items [line items]
Notional amount	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	€ 8	8	8	8	8	8	8	8
Average exchange rate | $ / R$																					3.716
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Exchange rate risk | 3 to 12 months
Disclosure of detailed information about hedged items [line items]
Notional amount	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	€ 26	26	26	26	26	26	26	26
Average exchange rate | $ / R$																					3.648
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Cash flow hedges | Exchange rate risk | More than five years
Disclosure of detailed information about hedged items [line items]
Notional amount	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238	€ 238
Average exchange rate | $ / R$																					3.135

Hedging Derivatives - Hedged ex

Hedging Derivatives - Hedged exposures (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	€ 111,461
Carrying amount of hedged items - Liabilities	46,830
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	1,925
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(1,765)
Change in fair value of hedged item for ineffectiveness assessment	(452)
Cash flow hedge/currency translation reserve - Continuing hedges	447
Cash flow hedge/currency translation reserve- Discontinued hedges	(10)
Accumulated fair value hedge adjustment remaining in statement of financial position for hedged item that ceased to be adjusted for hedging gains and losses, assets	71
Fair value hedges
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	110,669
Carrying amount of hedged items - Liabilities	46,830
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	1,915
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(1,765)
Change in fair value of hedged item for ineffectiveness assessment	(20)
Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	104,393
Carrying amount of hedged items - Liabilities	39,251
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	1,886
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(1,478)
Change in fair value of hedged item for ineffectiveness assessment	(74)
Fair value hedges | Interest rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	5,922
Carrying amount of hedged items - Liabilities	1,195
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	279
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	1
Change in fair value of hedged item for ineffectiveness assessment	(39)
Fair value hedges | Interest rate risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	27,235
Carrying amount of hedged items - Liabilities	21,759
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	792
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(791)
Change in fair value of hedged item for ineffectiveness assessment	(35)
Fair value hedges | Interest rate risk | Repurchase Agreement [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	13,874
Carrying amount of hedged items - Liabilities	561
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	25
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(16)
Change in fair value of hedged item for ineffectiveness assessment	18
Fair value hedges | Interest rate risk | Loans of securities
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	53,397
Carrying amount of hedged items - Liabilities	175
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	742
Change in fair value of hedged item for ineffectiveness assessment	(186)
Fair value hedges | Interest rate risk | Liquidity facilities
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	3,965
Carrying amount of hedged items - Liabilities	232
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	48
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(2)
Change in fair value of hedged item for ineffectiveness assessment	35
Fair value hedges | Interest rate risk | Issuance assurance
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Liabilities	2,013
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(12)
Change in fair value of hedged item for ineffectiveness assessment	3
Fair value hedges | Interest rate risk | Securitisation
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Liabilities	13,316
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(658)
Change in fair value of hedged item for ineffectiveness assessment	170
Fair value hedges | Interest rate risk | Equity instruments
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(40)
Fair value hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	3,378
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	5
Change in fair value of hedged item for ineffectiveness assessment	(3)
Fair value hedges | Exchange rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	1,614
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	9
Change in fair value of hedged item for ineffectiveness assessment	8
Fair value hedges | Exchange rate risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	1,764
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	(4)
Change in fair value of hedged item for ineffectiveness assessment	(11)
Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	2,776
Carrying amount of hedged items - Liabilities	7,474
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	21
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(287)
Change in fair value of hedged item for ineffectiveness assessment	53
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	1,591
Carrying amount of hedged items - Liabilities	3,571
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	2
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(26)
Change in fair value of hedged item for ineffectiveness assessment	(31)
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Repurchase Agreement [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	434
Carrying amount of hedged items - Liabilities	99
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	1
Change in fair value of hedged item for ineffectiveness assessment	1
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Securitisation
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Liabilities	3,358
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	(262)
Change in fair value of hedged item for ineffectiveness assessment	67
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Deposits Contracts [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	751
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	19
Change in fair value of hedged item for ineffectiveness assessment	16
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | CLO
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Liabilities	446
Fair value hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	68
Carrying amount of hedged items - Liabilities	105
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	3
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	1
Change in fair value of hedged item for ineffectiveness assessment	4
Fair value hedges | Inflation Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Liabilities	105
Accumulated amount of fair value adjustments on the hedged item - Liabilities (macro and micro)	1
Change in fair value of hedged item for ineffectiveness assessment	1
Fair value hedges | Inflation Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	68
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	3
Change in fair value of hedged item for ineffectiveness assessment	3
Fair value hedges | Credit risk
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	54
Fair value hedges | Credit risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	54
Cash flow hedges
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(432)
Cash flow hedge/currency translation reserve - Continuing hedges	447
Cash flow hedge/currency translation reserve- Discontinued hedges	(10)
Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(52)
Cash flow hedge/currency translation reserve - Continuing hedges	131
Cash flow hedge/currency translation reserve- Discontinued hedges	(12)
Cash flow hedges | Interest rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(26)
Cash flow hedge/currency translation reserve - Continuing hedges	47
Cash flow hedges | Interest rate risk | Liquidity facilities
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	8
Cash flow hedge/currency translation reserve - Continuing hedges	65
Cash flow hedge/currency translation reserve- Discontinued hedges	(12)
Cash flow hedges | Interest rate risk | Loan commitments
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(24)
Cash flow hedge/currency translation reserve - Continuing hedges	(75)
Cash flow hedges | Interest rate risk | Government class bonds
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(13)
Cash flow hedge/currency translation reserve - Continuing hedges	92
Cash flow hedges | Interest rate risk | Secondary Market Loans [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	4
Cash flow hedge/currency translation reserve - Continuing hedges	2
Cash flow hedges | Interest rate risk | Senior securitization
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(1)
Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(416)
Cash flow hedge/currency translation reserve - Continuing hedges	(23)
Cash flow hedge/currency translation reserve- Discontinued hedges	2
Cash flow hedges | Exchange rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	83
Cash flow hedge/currency translation reserve - Continuing hedges	(8)
Cash flow hedges | Exchange rate risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(309)
Cash flow hedge/currency translation reserve - Continuing hedges	(16)
Cash flow hedge/currency translation reserve- Discontinued hedges	2
Cash flow hedges | Exchange rate risk | CLO
Disclosure of detailed information about hedged items [line items]
Cash flow hedge/currency translation reserve - Continuing hedges	1
Cash flow hedges | Exchange rate risk | Secondary Market Loans [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(179)
Cash flow hedge/currency translation reserve - Continuing hedges	(21)
Cash flow hedges | Exchange rate risk | Senior securitization
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(11)
Cash flow hedge/currency translation reserve - Continuing hedges	21
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	4
Cash flow hedge/currency translation reserve - Continuing hedges	341
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	7
Cash flow hedge/currency translation reserve - Continuing hedges	2
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(13)
Cash flow hedge/currency translation reserve - Continuing hedges	(9)
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Securitisation
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	10
Cash flow hedge/currency translation reserve - Continuing hedges	348
Cash flow hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	15
Cash flow hedge/currency translation reserve - Continuing hedges	22
Cash flow hedges | Inflation Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	25
Cash flow hedge/currency translation reserve - Continuing hedges	25
Cash flow hedges | Inflation Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(3)
Cash flow hedge/currency translation reserve - Continuing hedges	(3)
Cash flow hedges | Inflation Risk [Member] | Liquidity facilities
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	(7)
Cash flow hedges | Market value of equity
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	17
Cash flow hedge/currency translation reserve - Continuing hedges	(4)
Cash flow hedges | Market value of equity | Highly likely scheduled transactions
Disclosure of detailed information about hedged items [line items]
Change in fair value of hedged item for ineffectiveness assessment	17
Cash flow hedge/currency translation reserve - Continuing hedges	(4)
Cash flow hedges | Other risks
Disclosure of detailed information about hedged items [line items]
Cash flow hedge/currency translation reserve - Continuing hedges	(20)
Cash flow hedges | Other risks | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Cash flow hedge/currency translation reserve - Continuing hedges	(20)
Hedges of net investment in foreign operations
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	792
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	10
Hedges of net investment in foreign operations | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	792
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	10
Hedges of net investment in foreign operations | Exchange rate risk | Equity instruments
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	779
Accumulated amount of fair value adjustments on the hedged item - Assets (macro and micro hedges)	10
Hedges of net investment in foreign operations | Exchange rate risk | Loan commitments
Disclosure of detailed information about hedged items [line items]
Carrying amount of hedged items - Assets	€ 13

Hedging Derivatives - Net impac

Hedging Derivatives - Net impact (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	€ 200
Ineffective coverage recognised in the income statement	83
Reclassified amount of reserves to the income statement	553
Interest rate risk
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	193
Reclassified amount of reserves to the income statement	37
Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(20)
Reclassified amount of reserves to the income statement	(457)
Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	45
Reclassified amount of reserves to the income statement	967
Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	11
Reclassified amount of reserves to the income statement	4
Market value of equity
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(8)
Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(21)
Fair value hedges
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	75
Fair value hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(18)
Fair value hedges | Interest rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(24)
Fair value hedges | Interest rate risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(61)
Fair value hedges | Interest rate risk | Repurchase Agreement [Member]
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	1
Fair value hedges | Interest rate risk | Loans of securities
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	46
Fair value hedges | Interest rate risk | Liquidity facilities
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	12
Fair value hedges | Interest rate risk | Securitisation
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	8
Fair value hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	95
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	39
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	8
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | Securitisation
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	49
Fair value hedges | Interest Rate And Exchange Rate Risk [Member] | CLO
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(1)
Fair value hedges | Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(2)
Fair value hedges | Other Risk [Member] | Securitisation
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(2)
Cash flow hedges
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	200
Ineffective coverage recognised in the income statement	8
Reclassified amount of reserves to the income statement	553
Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	193
Ineffective coverage recognised in the income statement	(4)
Reclassified amount of reserves to the income statement	39
Cash flow hedges | Interest rate risk | Loan commitments
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(2)
Reclassified amount of reserves to the income statement	(24)
Cash flow hedges | Interest rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	50
Ineffective coverage recognised in the income statement	(21)
Reclassified amount of reserves to the income statement	(4)
Cash flow hedges | Interest rate risk | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	104
Ineffective coverage recognised in the income statement	2
Reclassified amount of reserves to the income statement	17
Cash flow hedges | Interest rate risk | Secondary Market Loans [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	85
Ineffective coverage recognised in the income statement	16
Reclassified amount of reserves to the income statement	47
Cash flow hedges | Interest rate risk | Repurchase Agreement [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(46)
Cash flow hedges | Interest rate risk | Liquidity facilities
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	2
Reclassified amount of reserves to the income statement	3
Cash flow hedges | Interest rate risk | Securitisation
Disclosure of detailed information about hedged items [line items]
Ineffective coverage recognised in the income statement	(1)
Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(20)
Ineffective coverage recognised in the income statement	(688)
Reclassified amount of reserves to the income statement	(457)
Cash flow hedges | Exchange rate risk | Deposits
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(25)
Ineffective coverage recognised in the income statement	(698)
Reclassified amount of reserves to the income statement	(563)
Cash flow hedges | Exchange rate risk | Secondary Market Loans [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	5
Ineffective coverage recognised in the income statement	4
Reclassified amount of reserves to the income statement	48
Cash flow hedges | Exchange rate risk | Asset bonds
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(25)
Ineffective coverage recognised in the income statement	43
Reclassified amount of reserves to the income statement	89
Cash flow hedges | Exchange rate risk | Repurchase Agreement [Member]
Disclosure of detailed information about hedged items [line items]
Reclassified amount of reserves to the income statement	(3)
Cash flow hedges | Exchange rate risk | Securitisation
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	24
Ineffective coverage recognised in the income statement	(37)
Reclassified amount of reserves to the income statement	(36)
Cash flow hedges | Exchange rate risk | CLO
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	1
Reclassified amount of reserves to the income statement	8
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	45
Ineffective coverage recognised in the income statement	700
Reclassified amount of reserves to the income statement	967
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	1
Ineffective coverage recognised in the income statement	743
Reclassified amount of reserves to the income statement	778
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(4)
Ineffective coverage recognised in the income statement	447
Reclassified amount of reserves to the income statement	571
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member] | Securitisation
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	48
Ineffective coverage recognised in the income statement	(490)
Reclassified amount of reserves to the income statement	(382)
Cash flow hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	11
Reclassified amount of reserves to the income statement	4
Cash flow hedges | Inflation Risk [Member] | Deposits
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	14
Reclassified amount of reserves to the income statement	3
Cash flow hedges | Inflation Risk [Member] | Asset bonds
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(3)
Reclassified amount of reserves to the income statement	1
Cash flow hedges | Market value of equity
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(8)
Cash flow hedges | Market value of equity | Highly probable planned transactions
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(8)
Cash flow hedges | Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	(21)
Cash flow hedges | Other Risk [Member] | Bond [Member]
Disclosure of detailed information about hedged items [line items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	€ (21)

Hedging Derivatives - Reconcili

Hedging Derivatives - Reconciliation of components of equity (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about hedged items [line items]
Balance at beginning of period	€ 152	€ 469
Earnings (losses) recognized in other comprehensive income	200
Amounts transferred to income statements	(553)
Minorities	(25)
Taxes	(50)	108	€ (136)
Balance at end of period	277	€ 152	€ 469
Interest rate risk
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	193
Amounts transferred to income statements	(37)
Other reclassifications	230
Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	(20)
Amounts transferred to income statements	457
Other reclassifications	(477)
Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	45
Amounts transferred to income statements	(967)
Other reclassifications	1,012
Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	11
Amounts transferred to income statements	(4)
Other reclassifications	15
Market value of equity
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	(8)
Other reclassifications	(8)
Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	(21)
Other reclassifications	(21)
Cash flow hedges
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	200
Amounts transferred to income statements	(553)
Cash flow hedges | Interest rate risk
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	193
Amounts transferred to income statements	(39)
Cash flow hedges | Exchange rate risk
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	(20)
Amounts transferred to income statements	457
Cash flow hedges | Interest Rate And Exchange Rate Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	45
Amounts transferred to income statements	(967)
Cash flow hedges | Inflation Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	11
Amounts transferred to income statements	(4)
Cash flow hedges | Market value of equity
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	(8)
Cash flow hedges | Other Risk [Member]
Disclosure of detailed information about hedged items [line items]
Earnings (losses) recognized in other comprehensive income	€ (21)

Interest income (Details)

Interest income (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income.
Loans and advances - Central banks	€ 1,320	€ 1,881	€ 2,090
Loans and advances - Credit institutions	1,555	1,840	2,388
Debt instruments	6,429	7,141	6,927
Loans and advances - Customers	43,489	43,640	42,578
Other interest income	1,532	1,539	1,173
Total interest income	€ 54,325	€ 56,041	€ 55,156

Interest expense (Details)

Interest expense (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest expense.
Central banks deposits	€ 421	€ 216	€ 127
Credit institution deposits	2,597	2,045	1,988
Customer deposits	9,062	11,074	12,886
Debt securities issued and Subordinated liabilities	6,073	6,651	7,767
Marketable debt securities	5,303	5,685	6,822
Subordinated liabilities (Note 23)	770	966	945
Provisions for pensions (Note 25)	186	198	201
Other interest	1,645	1,561	1,098
Total interest expense	€ 19,984	€ 21,745	€ 24,067

Dividend income (Details)

Dividend income (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Dividend income	€ 370	€ 384	€ 413
Financial assets held for trading, category
Disclosure of financial assets [line items]
Dividend income	241	234	217
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member]
Disclosure of financial assets [line items]
Dividend income	23
Financial assets available for sale, category
Disclosure of financial assets [line items]
Dividend income		€ 150	€ 196
Financial assets at fair value through other comprehensive income, category
Disclosure of financial assets [line items]
Dividend income	€ 106

Income from companies account_3

Income from companies accounted for using the equity method (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of associates [line items]
Income from companies accounted for using the equity method	€ 737	€ 704	€ 444
Zurich Santander Insurance America S.L.
Disclosure of associates [line items]
Income from companies accounted for using the equity method	194	241	223
Wizink Bank, S.A.
Disclosure of associates [line items]
Income from companies accounted for using the equity method	56	36
Allianz Popular, S.L.
Disclosure of associates [line items]
Income from companies accounted for using the equity method	45	15
Companhia de Credito, Financiamento e Investimento RCI Brasil
Disclosure of associates [line items]
Income from companies accounted for using the equity method	21	19	12
Other Companies
Disclosure of associates [line items]
Income from companies accounted for using the equity method	€ 421	306	130
SAM Investment Holdings Limited
Disclosure of associates [line items]
Income from companies accounted for using the equity method		€ 87	€ 79

Commission income (Details)

Commission income (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Collection and payment services:
Bills	€ 334	€ 368	€ 295
Demand accounts	1,371	1,490	1,191
Cards	3,514	3,515	2,972
Orders	475	449	431
Cheques and other	138	154	133
Total collection and payment services	5,832	5,976	5,022
Marketing of non-banking financial products:
Investment funds	1,024	751	696
Pension funds	124	92	86
Insurance	2,433	2,517	2,428
Total marketing of non-banking financial products	3,581	3,360	3,210
Securities services:
Securities underwriting and placement	283	374	282
Securities trading	251	302	287
Administration and custody	458	359	297
Asset management	305	251	201
Total securities services	1,297	1,286	1,067
Other:
Foreign exchange	546	471	353
Financial guarantees	549	559	505
Commitment fees	291	283	286
Other fees and commissions	2,568	2,644	2,500
Total other	3,954	3,957	3,644
Total commission income	€ 14,664	€ 14,579	€ 12,943

Commission expense (Details)

Commission expense (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commission expense
Commissions assigned to third parties	€ 1,972	€ 1,831	€ 1,639
Cards	1,358	1,391	1,217
By collection and return of effects	11	12	11
Other fees assigned	603	428	411
Other commissions paid	1,207	1,151	1,124
Brokerage fees on lending and deposit transactions	42	49	47
Sales of insurance and pension funds	232	205	204
Other fees and commissions	933	897	873
Total commission expense	€ 3,179	€ 2,982	€ 2,763

Gains or losses on financial _3

Gains or losses on financial assets and liabilities (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net	€ 604	€ 404	€ 869
Gains (losses) on financial assets at amortised cost	39
Other financial assets and liabilities	565
Gains (losses) on available-for-sale financial assets		472	861
Gains or losses on financial assets and liabilities held for trading, net	1,515	1,252	2,456
Gains Or Losses On Non-trading Financial Assets And Liabilities Mandatorily At Fair Value Through Profit Or Loss	331
Gains or losses on financial assets and liabilities measured at fair value through profit or loss, net	(57)	(85)	426
Gains or losses from hedge accounting, net	83	(11)	(23)
Gains/losses on financial assets and liabilities, net	2,476	1,560	3,728
Exchange differences, net	(679)	105	(1,627)
Debt instruments
Financial instruments
Other financial assets and liabilities	€ 563
Gains (losses) on available-for-sale financial assets		316	464
Equity instruments
Financial instruments
Gains (losses) on available-for-sale financial assets		€ 156	€ 397

Gains or losses on financial _4

Gains or losses on financial assets and liabilities - Financial assets (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Financial assets at fair value through profit or loss	€ 161,069	€ 160,240	€ 179,796
Maximum exposure to credit risk	993,412
Derivatives
Financial instruments
Financial assets at fair value through profit or loss	55,939	57,243	72,043
Maximum exposure to credit risk	33,289
Equity instruments
Financial instruments
Financial assets at fair value through profit or loss	12,198	22,286	15,043
Debt instruments
Financial instruments
Financial assets at fair value through profit or loss	36,609	39,836	52,320
Spanish and foreign government securities
Financial instruments
Financial assets at fair value through profit or loss	27,720
Loans and advances
Financial instruments
Financial assets at fair value through profit or loss	56,323	40,875	40,390
Loans and advances - Central banks
Financial instruments
Financial assets at fair value through profit or loss	9,226
Loans and advances - Credit institutions
Financial instruments
Financial assets at fair value through profit or loss	23,099	11,585	13,290
Loans and advances - Customers
Financial instruments
Financial assets at fair value through profit or loss	23,998	€ 29,290	€ 27,100
Loans and advances - credit institutions and customers
Financial instruments
Reverse repurchase agreements	33,837
Mortgage backed assets	€ 1,334

Gains or losses on financial _5

Gains or losses on financial assets and liabilities - Financial liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial instruments
Financial liabilities at fair value	€ 138,401	€ 167,240	€ 149,028
Deposits
Financial instruments
Financial liabilities at fair value	65,304	84,724	48,863
Deposits - Central banks
Financial instruments
Financial liabilities at fair value	14,816	9,142	10,463
Deposits - Credit institutions
Financial instruments
Financial liabilities at fair value	10,891	18,458	5,059
Deposits - Customers
Financial instruments
Financial liabilities at fair value	39,597	57,124	33,341
Marketable debt securities
Financial instruments
Financial liabilities at fair value	2,305	3,056	2,791
Short positions
Financial instruments
Financial liabilities at fair value	15,002	20,979	23,005
Derivatives
Financial instruments
Financial liabilities at fair value	55,341	57,892	€ 74,369
Other financial liabilities
Financial instruments
Financial liabilities at fair value	€ 449	€ 589

Other operating income and ex_3

Other operating income and expenses (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of types of insurance contracts [line items]
Insurance activity	€ 51	€ 57	€ 63
Income from insurance and reinsurance contracts issued	3,175	2,546	1,900
Expenses of insurance and reinsurance contracts	(3,124)	(2,489)	(1,837)
Other operating income	1,643	1,618	1,919
Non-financial services	367	472	698
Other operating income	1,276	1,146	1,221
Other operating expense	(2,000)	(1,966)	(1,977)
Non-financial services	(270)	(302)	(518)
Other operating expense:	(1,730)	(1,664)	(1,459)
Of which, Deposit Guarantee Fund	(895)	(848)	(711)
Total other operating income and expenses	(306)	(291)	5
Life insurance
Disclosure of types of insurance contracts [line items]
Expenses of insurance and reinsurance contracts	(2,883)	(2,249)	(1,574)
Insurance and reinsurance
Disclosure of types of insurance contracts [line items]
Income from insurance and reinsurance contracts issued	3,011	2,350	1,709
Reinsurance
Disclosure of types of insurance contracts [line items]
Income from insurance and reinsurance contracts issued	164	196	191
Expenses of insurance and reinsurance contracts	€ (241)	€ (240)	€ (263)

Personnel expenses - Breakdown

Personnel expenses - Breakdown (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Average headcount and number of offices
Wages and salaries	€ 8,824	€ 8,879	€ 8,133
Social security costs	1,412	1,440	1,291
Additions to provisions for defined benefit pension plans (Note 25)	84	88	81
Contributions to defined contribution pension funds	287	271	266
Other personnel expenses	1,258	1,369	1,233
Total personnel expenses	€ 11,865	€ 12,047	€ 11,004

Personnel expenses - Headcount

Personnel expenses - Headcount (Details) - employee	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Number of employees
Average number of employees	201,829	195,732	191,635
Number of employees	202,713	202,251	188,492
Average number of employees with disabilities	3,436
Banco Santander S.A.
Number of employees
Average number of employees with disabilities	241	209	216
Number of employees with disabilities at end of period	304	211	213
Threshold degree of disability (as a percent)	33.00%	33.00%
The Bank Personnel
Number of employees
Average number of employees	30,421	21,391	22,284
The Bank Senior management
Number of employees
Average number of employees	22	64	76
The Bank Other line personnel
Number of employees
Average number of employees	30,399	21,327	20,291
The Bank Clerical staff
Number of employees
Average number of employees			1,904
The Bank General services personnel
Number of employees
Average number of employees			13
Rest of Spain
Number of employees
Average number of employees	7,944	12,703	6,925
Santander UK plc
Number of employees
Average number of employees	18,757	19,079	19,428
Banco Santander (Brasil) S.A
Number of employees
Average number of employees	46,645	46,210	48,052
Other Companies
Number of employees
Average number of employees	98,062	96,349	94,946
Senior executives/management
Number of employees
Number of employees - men	1,543
Number of employees - women	399
Percentage of employees - men	79.00%
Percentage of employees - women	21.00%
Average number of employees with disabilities	6
Other executives
Number of employees
Number of employees - men	14,471
Number of employees - women	8,607
Percentage of employees - men	63.00%
Percentage of employees - women	37.00%
Other personnel
Number of employees
Number of employees - men	76,120
Number of employees - women	101,573
Percentage of employees - men	43.00%
Percentage of employees - women	57.00%
Other management
Number of employees
Average number of employees with disabilities	64
Other staff
Number of employees
Average number of employees with disabilities	3,366
SPAIN
Number of employees
Average number of employees with disabilities		3,289	2,941
Threshold degree of disability (as a percent)	33.00%
Abroad | Senior executives/management
Number of employees
Number of employees - men	523
Number of employees - women	100
Percentage of employees - men	84.00%
Percentage of employees - women	16.00%
Abroad | Other executives
Number of employees
Number of employees - men	6,427
Number of employees - women	4,256
Percentage of employees - men	60.00%
Percentage of employees - women	40.00%
Abroad | Other personnel
Number of employees
Number of employees - men	40,729
Number of employees - women	54,952
Percentage of employees - men	43.00%
Percentage of employees - women	57.00%
Continental Europe | Senior executives/management
Number of employees
Number of employees - men	913
Number of employees - women	260
Percentage of employees - men	78.00%
Percentage of employees - women	22.00%
Continental Europe | Other executives
Number of employees
Number of employees - men	6,735
Number of employees - women	3,711
Percentage of employees - men	64.00%
Percentage of employees - women	36.00%
Continental Europe | Other personnel
Number of employees
Number of employees - men	26,173
Number of employees - women	32,759
Percentage of employees - men	44.00%
Percentage of employees - women	56.00%
UK | Senior executives/management
Number of employees
Number of employees - men	107
Number of employees - women	39
Percentage of employees - men	73.00%
Percentage of employees - women	27.00%
UK | Other executives
Number of employees
Number of employees - men	1,309
Number of employees - women	640
Percentage of employees - men	67.00%
Percentage of employees - women	33.00%
UK | Other personnel
Number of employees
Number of employees - men	9,218
Number of employees - women	13,862
Percentage of employees - men	40.00%
Percentage of employees - women	60.00%

Personnel expenses - Deferred c

Personnel expenses - Deferred conditional plans (Details) - EUR (€) € in Millions	12 Months Ended	60 Months Ended
	Dec. 31, 2018	Dec. 31, 2015
Deferred And Conditional Variable Remuneration Plan [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Benchmark bonus 300 or less - percentage deferred	0.00%
Benchmark bonus 300 to 600 - percentage deferred	20.00%
Benchmark bonus more than 600 - percentage deferred	30.00%
Deferred conditional variable remuneration plan
Share-based payment arrangement
Variable Remuneration or bonus deferral period		5 years
Bonus paid in cash - (as a percent)	50.00%
Bonus paid in shares - (as a percent)	50.00%
Deferred percentage		60.00%
Deferred Conditional Variable Remuneration Plan Third Cycle 2013 [Member]
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Deferred Conditional Variable Remuneration Plan Third Cycle 2013 [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Deferred Conditional Variable Remuneration Plan Third Cycle 2013 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Immediate payment percentage	50.00%
Deferred percentage	50.00%
Deferred Conditional Variable Remuneration Plan Third Cycle 2013 [Member] | Other Beneficiaries
Share-based payment arrangement
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Deferred Conditional Variable Remuneration Plan Fourth And Fifth Cycles 2014 And 2015 [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 2.6
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Deferred Conditional Variable Remuneration Plan Fourth And Fifth Cycles 2014 And 2015 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Immediate payment percentage	50.00%
Deferred percentage	50.00%
Deferred Conditional Variable Remuneration Plan Fourth And Fifth Cycles 2014 And 2015 [Member] | Other Beneficiaries
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Immediate payment percentage	60.00%
Deferred percentage	40.00%
Deferred Conditional Variable Remuneration Plan Fourth Cycle 2014 [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Deferred Conditional Variable Remuneration Plan Fourth Cycle 2014 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Deferred Conditional Variable Remuneration Plan Fifth Cycle 2015 [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	5 years
Deferred Conditional Variable Remuneration Plan Fifth Cycle 2015 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	5 years
Deferred Conditional Variable Remuneration Plan Sixth Cycle 2016 [Member]
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Immediate payment percentage	60.00%
Deferred percentage	40.00%
Deferred Conditional Variable Remuneration Plan Seventh And Eighth Cycles 2017 And 2018 [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	5 years
Gross variable remuneration benchmark threshold	€ 2.7
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Deferred Conditional Variable Remuneration Plan Seventh And Eighth Cycles 2017 And 2018 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Variable Remuneration or bonus deferral period	5 years
Immediate payment percentage	50.00%
Deferred percentage	50.00%
Deferred Conditional Variable Remuneration Plan Seventh And Eighth Cycles 2017 And 2018 [Member] | Other Beneficiaries
Share-based payment arrangement
Variable Remuneration or bonus deferral period	3 years
Immediate payment percentage	60.00%
Deferred percentage	40.00%
Minimum | Deferred And Conditional Variable Remuneration Plan [Member] | Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 0.3
Minimum | Deferred Conditional Variable Remuneration Plan Fourth Cycle 2014 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	1.7
Minimum | Deferred Conditional Variable Remuneration Plan Fifth Cycle 2015 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	1.8
Minimum | Deferred Conditional Variable Remuneration Plan Seventh And Eighth Cycles 2017 And 2018 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	1.7
Maximum | Deferred Conditional Variable Remuneration Plan Fourth And Fifth Cycles 2014 And 2015 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	2.6
Maximum | Deferred Conditional Variable Remuneration Plan Seventh And Eighth Cycles 2017 And 2018 [Member] | Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 2.7

Personnel expenses - Performanc

Personnel expenses - Performance share plan (Details)	12 Months Ended
	Dec. 31, 2018item
Performance Share Plan First Cycle 2014 [Member]
Share-based payment arrangement
Number of benchmark group credit institutions	15
Performance Share Plan Second Cycle 2015 [Member]
Share-based payment arrangement
Maximum number of shares to which a beneficiary is entitled (as a percent)	20.00%
Number of benchmark group credit institutions	17

Personnel expenses - Deferred m

Personnel expenses - Deferred multiyear objectives variable plan (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)companyitem	Dec. 31, 2017period
Deferred variable compensation plan linked to multiannual objectives
Share-based payment arrangement
Bonus paid in cash - (as a percent)	50.00%
Bonus paid in shares - (as a percent)	50.00%
Number of trading sessions | period		15
Immediate payment percentage		40.00%
Deferred percentage	60.00%	60.00%
Variable Remuneration or bonus deferral period		5 years
Number of credit institutions included in reference group | company	17
Deferred Multiyear Objectives Variable Remuneration Plan Second And Third Cycles [Member]
Share-based payment arrangement
Number of credit institutions included in reference group | item	17
Executive Directors And Members Of Identified Staff With Total Variable Remuneration Specified Amount | Deferred Multiyear Objectives Variable Remuneration Plan First Cycle 2016 [Member]
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 2.7
Immediate payment percentage	40.00%
Deferred percentage	60.00%
Variable Remuneration or bonus deferral period	5 years
Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount | Deferred Multiyear Objectives Variable Remuneration Plan First Cycle 2016 [Member]
Share-based payment arrangement
Immediate payment percentage	50.00%
Deferred percentage	50.00%
Variable Remuneration or bonus deferral period	5 years
Percentage of capital necessary	1.00%
Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount | Deferred Multiyear Objectives Variable Remuneration Plan First Cycle 2016 [Member] | Minimum
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 1.7
Division Managers Country Heads Other Executives And Identified Staff With Total Variable Remuneration Specified Amount | Deferred Multiyear Objectives Variable Remuneration Plan First Cycle 2016 [Member] | Maximum
Share-based payment arrangement
Gross variable remuneration benchmark threshold	€ 2.7
Other Beneficiaries | Deferred Multiyear Objectives Variable Remuneration Plan First Cycle 2016 [Member]
Share-based payment arrangement
Immediate payment percentage	60.00%
Deferred percentage	40.00%
Variable Remuneration or bonus deferral period	3 years

Personnel expenses - Santander

Personnel expenses - Santander UK plc (Details)	12 Months Ended
	Dec. 31, 2018EUR (€)item€ / £contract	Dec. 31, 2017EUR (€)item€ / £contract	Dec. 31, 2016EUR (€)item€ / £contract	Dec. 31, 2008GBP (£)item	Dec. 31, 2015€ / £
Share-based payment arrangement
Exchange rate	43.12
Santander UK plc | Sharesave plan
Share-based payment arrangement
Number of shares outstanding, beginning of period	27,201,000	28,916,000	24,762,000
Options granted	6,210,000	3,916,000	17,296,000
Options exercised	(3,340,000)	(1,918,000)	(338,000)
Options cancelled (net) or not exercised	(3,233,000)	(3,713,000)	(12,804,000)
Number of share options outstanding, end of period	26,838,000	27,201,000	28,916,000
Exercise price of share options granted in share-based payment arrangement | €	€ 3.46	€ 4.02	€ 4.91
Exercise price of share options exercised in share-based payment arrangement | €	3.16	3.77	3.67
Exercise price of share options cancelled in share-based payment arrangement | €	€ 3.76	€ 3.40	€ 3.51
Number of persons | contract	4,880	4,260	7,024
Exchange rate | € / £	1.11790	1.12710	1.16798		1.36249
Minimum number of accounts/contracts per employee | contract	1
Percentage employees may reduce the average purchase and sale prices of shares under the Sharesave Scheme				20.00%
Number of trading sessions				3
Santander UK plc | Minimum | Sharesave plan
Share-based payment arrangement
Employee contributions deducted from their net monthly pay | £				£ 5
Period of time the employee contributions are deducted from their net monthly pay for the voluntary Sharesave Scheme				3 years
Period for approval of the Sharesave Scheme by UK tax authorities				21 days
Santander UK plc | Maximum | Sharesave plan
Share-based payment arrangement
Employee contributions deducted from their net monthly pay | £				£ 500
Period of time the employee contributions are deducted from their net monthly pay for the voluntary Sharesave Scheme				5 years
Period for approval of the Sharesave Scheme by UK tax authorities				41 days

Personnel expenses - Fair value

Personnel expenses - Fair value (Details)	12 Months Ended
	Dec. 31, 2018item	Dec. 31, 2017Y	Dec. 31, 2016Y
Minimum
Share-based payment arrangement
Expected volatility		26.16%	31.39%
Annual dividend yield based on last few years		5.48%	5.92%
Risk-free interest rate		0.89%	0.31%
Dividend increase		5.48%	5.92%
Maximum
Share-based payment arrangement
Expected volatility		26.31%	32.00%
Annual dividend yield based on last few years		5.51%	6.21%
Risk-free interest rate		1.08%	0.41%
Dividend increase		5.51%	6.21%
Deferred variable compensation plan linked to multiannual objectives
Share-based payment arrangement
Fair value of plan, initial achievement	70.00%
Deferred variable compensation plan linked to multiannual objectives | Minimum
Share-based payment arrangement
Reasonable initial achievement ratio	60.00%
Deferred variable compensation plan linked to multiannual objectives | Maximum
Share-based payment arrangement
Reasonable initial achievement ratio	80.00%
Performance Share Plan First Cycle 2014 [Member]
Share-based payment arrangement
Number of simulations using a Monte Carlo valuation model to determine the TSR	10,000
Expected volatility	51.35%
Annual dividend yield based on last few years	6.06%
Risk-free interest rate	4.073%
Dividend increase	6.06%
Historical volatility period	3 years
Simulation Model Fair Value	55.39%
Performance Share Plan Second Cycle 2015 [Member]
Share-based payment arrangement
Fair value of plan, initial achievement	70.00%
Maximum achievement level	91.50%
Fair value of plan	64.05%
Performance Share Plan Second Cycle 2015 [Member] | Minimum
Share-based payment arrangement
Reasonable initial achievement ratio	60.00%
Performance Share Plan Second Cycle 2015 [Member] | Maximum
Share-based payment arrangement
Reasonable initial achievement ratio	80.00%
Sharesave plan | Minimum
Share-based payment arrangement
Expected volatility	23.99%
Annual dividend yield based on last few years	5.60%
Risk-free interest rate	1.27%
Dividend increase	5.60%
Expected life of options granted (in years)	3	3	3
Sharesave plan | Maximum
Share-based payment arrangement
Expected volatility	24.17%
Annual dividend yield based on last few years	6.12%
Risk-free interest rate	1.40%
Dividend increase	6.12%
Expected life of options granted (in years)	5	5	5

Other general administrative _3

Other general administrative expenses - Breakdown of other general administrative expenses (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other general administrative expenses
Property, fixtures and supplies	€ 1,968	€ 1,931	€ 1,853
Technology and systems	1,550	1,257	1,095
Technical reports	707	759	768
Advertising	646	757	691
Taxes other than income tax	557	583	484
Communications	527	529	499
Surveillance and cash courier services	405	443	389
Per diems and travel expenses	225	217	232
Insurance premiums	76	78	69
Other administrative expenses	1,828	1,799	1,653
Other general administrative expenses	€ 8,489	€ 8,353	€ 7,733

Other general administrative _4

Other general administrative expenses - Technical reports and other (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other general administrative expenses
Audit fees	€ 90	€ 88.1	€ 73.7
Audit related fees	6.5	6.7	7.2
Tax fees	0.9	1.3	0.9
All other fees	3.4	3.1	3.6
Total	100.8	99.2	85.4
Commissioned services from audit firms	€ 173.9	€ 115.6	€ 127.9

Other general administrative _5

Other general administrative expenses - Number of offices (Details) - item	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of geographical areas [line items]
Number of offices	13,217	13,697
SPAIN
Disclosure of geographical areas [line items]
Number of offices	4,427	4,546
Abroad
Disclosure of geographical areas [line items]
Number of offices	8,790	9,151

Gains or losses on non-financ_3

Gains or losses on non-financial assets and investments, net (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of gains losses on disposals of non-financial assets [Line items]
Tangible and intangible assets, gains	€ 124	€ 134	€ 131
Investments, gains	2	443	30
Gains on disposals of tangible and intangible assets and investments	126	577	161
Tangible and intangible assets, losses	(92)	(43)	(116)
Investments, losses	(6)	(12)	(15)
Losses on disposals of tangible and intangible assets and investments	(98)	(55)	(131)
Gains (losses) on disposal of assets not classified as non-current assets held for sale, total	€ 28	522	€ 30
Allfunds Bank Sa [Member]
Disclosure of gains losses on disposals of non-financial assets [Line items]
Investments, gains		€ 425

Gains or losses on non-curren_3

Gains or losses on non-current assets held for sale not classified as discontinued operations (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets	€ (123)	€ (195)	€ (141)
Impairment (Note 12)	259	306	212
Gain (loss) on sale (Note 12)	126	577	161
Other gains and other losses		(8)
Net gains (losses) on noncurrent assets held for sale	(123)	(203)	(141)
Non-current assets held for sale [member]
Gains Or Losses On Assets Held For Sale [Line Items]
Impairment (Note 12)	320	347	241
Gain (loss) on sale (Note 12)	€ 136	€ 111	€ 71

Other disclosures - Residual ma

Other disclosures - Residual maturity periods and average interest rates (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Assets
Cash, cash balances at Central Banks and other deposits on demand	€ 113,663	€ 110,995	€ 76,454	€ 110,995	€ 77,751
Financial assets at amortised cost	946,099			909,094
Financial assets measured at fair value through other comprehensive income	118,420
Financial assets available-for-sale		133,271	116,774
Loans and receivables		903,013	840,004
Held-to-maturity investments		13,491	14,468
Total certain assets	1,178,182	1,155,980	1,042,213
Liabilities
Financial liabilities at amortized cost	1,171,630	1,126,069	1,044,240	1,126,069
Difference (assets less liabilities)	€ 6,552	€ 29,911	€ (2,027)
Average interest rate - financial assets	4.20%	4.61%	5.12%
Average interest rate - held to maturity investments		1.52%	1.70%
Average interest rate - financial liabilities	1.48%	1.98%	2.57%
Net borrowing position with ECB	€ 11,882
Deposits from central banks at amortised cost due to participation in the refinancing operations program	55,382
Undiscounted financial liabilities at amortised cost	1,162,832	€ 1,118,461	€ 1,035,499
On demand
Assets
Cash, cash balances at Central Banks and other deposits on demand	113,663	110,995	76,454
Financial assets at amortised cost	46,247
Financial assets measured at fair value through other comprehensive income	1,886
Loans and receivables		57,000	52,512
Total certain assets	161,796	168,321	129,166
Liabilities
Financial liabilities at amortized cost	545,284	537,604	480,075
Difference (assets less liabilities)	(383,488)	(369,283)	(350,909)
Undiscounted financial liabilities at amortised cost	542,124	537,546	476,091
1 month
Assets
Financial assets at amortised cost	56,818
Financial assets measured at fair value through other comprehensive income	6,023
Loans and receivables		58,686	48,420
Total certain assets	62,841	61,153	54,406
Liabilities
Financial liabilities at amortized cost	87,782	75,161	95,583
Difference (assets less liabilities)	(24,941)	(14,008)	(41,177)
Undiscounted financial liabilities at amortised cost	87,558	73,133	112,458
3 months
Assets
Financial assets at amortised cost	71,627
Financial assets measured at fair value through other comprehensive income	3,329
Loans and receivables		53,218	56,725
Total certain assets	74,956	54,864	58,732
Liabilities
Financial liabilities at amortized cost	93,293	87,939	67,282
Difference (assets less liabilities)	(18,337)	(33,075)	(8,550)
Undiscounted financial liabilities at amortised cost	91,598	110,270	72,048
3 to 12 months
Assets
Financial assets at amortised cost	102,036
Financial assets measured at fair value through other comprehensive income	12,873
Loans and receivables		96,689	85,521
Held-to-maturity investments		1,902	123
Total certain assets	114,909	110,088	91,086
Liabilities
Financial liabilities at amortized cost	127,522	130,672	125,774
Difference (assets less liabilities)	(12,613)	(20,584)	(34,688)
Undiscounted financial liabilities at amortised cost	127,237	128,920	107,254
1 to 3 years
Assets
Financial assets at amortised cost	134,697
Financial assets measured at fair value through other comprehensive income	19,432
Loans and receivables		119,541	113,387
Held-to-maturity investments		122	2,075
Total certain assets	154,129	142,110	139,036
Liabilities
Financial liabilities at amortized cost	182,670	136,487	115,591
Difference (assets less liabilities)	(28,541)	5,623	23,445
Undiscounted financial liabilities at amortised cost	181,772	119,082	110,293
3 to 5 years
Assets
Financial assets at amortised cost	107,921
Financial assets measured at fair value through other comprehensive income	10,705
Loans and receivables		112,786	93,816
Held-to-maturity investments		294	342
Total certain assets	118,626	124,244	108,058
Liabilities
Financial liabilities at amortized cost	56,927	83,542	69,467
Difference (assets less liabilities)	61,699	40,702	38,591
Undiscounted financial liabilities at amortised cost	56,023	75,681	69,245
More than five years
Assets
Financial assets at amortised cost	426,753
Financial assets measured at fair value through other comprehensive income	64,172
Loans and receivables		405,093	389,623
Held-to-maturity investments		11,173	11,928
Total certain assets	490,925	495,200	461,729
Liabilities
Financial liabilities at amortized cost	78,152	74,664	90,468
Difference (assets less liabilities)	412,773	420,536	371,261
Undiscounted financial liabilities at amortised cost	€ 76,520	€ 73,829	€ 88,110
Cash, Cash Balance At Central Banks And Other Deposits On Demand
Liabilities
Average interest rate - financial assets	0.61%	0.53%	0.98%
Debt instruments
Assets
Financial assets at amortised cost	€ 37,696			35,772
Financial assets measured at fair value through other comprehensive income	116,819
Financial assets available-for-sale	€ 118,420	€ 128,481	€ 111,287
Loans and receivables		17,543	13,237
Held-to-maturity investments		€ 13,491	€ 14,468
Liabilities
Average interest rate - financial assets at fair value through other comprehensive income	3.13%
Average interest rate - financial assets at amortised cost	3.33%
Average interest rate - financial assets available-for-sale		4.34%	4.33%
Average interest rate - financial assets		3.06%	6.31%
Debt instruments | On demand
Assets
Financial assets at amortised cost	€ 16
Financial assets measured at fair value through other comprehensive income	487
Financial assets available-for-sale		€ 326	€ 200
Loans and receivables		249	248
Debt instruments | 1 month
Assets
Financial assets at amortised cost	1,534
Financial assets measured at fair value through other comprehensive income	6,022
Financial assets available-for-sale		2,467	5,986
Loans and receivables		1,381	1,628
Debt instruments | 3 months
Assets
Financial assets at amortised cost	1,319
Financial assets measured at fair value through other comprehensive income	3,328
Financial assets available-for-sale		1,646	2,007
Loans and receivables		997	708
Debt instruments | 3 to 12 months
Assets
Financial assets at amortised cost	6,646
Financial assets measured at fair value through other comprehensive income	12,830
Financial assets available-for-sale		11,497	5,442
Loans and receivables		2,073	2,246
Debt instruments | 1 to 3 years
Assets
Financial assets at amortised cost	2,474
Financial assets measured at fair value through other comprehensive income	19,415
Financial assets available-for-sale		22,447	23,574
Loans and receivables		2,317	2,125
Debt instruments | 3 to 5 years
Assets
Financial assets at amortised cost	1,783
Financial assets measured at fair value through other comprehensive income	10,661
Financial assets available-for-sale		11,164	13,900
Loans and receivables		1,656	1,918
Debt instruments | More than five years
Assets
Financial assets at amortised cost	23,924
Financial assets measured at fair value through other comprehensive income	64,076
Financial assets available-for-sale		78,934	60,178
Loans and receivables		8,870	4,364
Loans and advances
Assets
Financial assets at amortised cost	908,403			873,322
Financial assets measured at fair value through other comprehensive income	1,601
Loans and receivables		885,470	826,767
Loans and advances | On demand
Assets
Financial assets at amortised cost	46,231
Financial assets measured at fair value through other comprehensive income	1,399
Loans and receivables		56,751	52,264
Loans and advances | 1 month
Assets
Financial assets at amortised cost	55,284
Financial assets measured at fair value through other comprehensive income	1
Loans and receivables		57,305	46,792
Loans and advances | 3 months
Assets
Financial assets at amortised cost	70,308
Financial assets measured at fair value through other comprehensive income	1
Loans and receivables		52,221	56,017
Loans and advances | 3 to 12 months
Assets
Financial assets at amortised cost	95,390
Financial assets measured at fair value through other comprehensive income	43
Loans and receivables		94,616	83,275
Loans and advances | 1 to 3 years
Assets
Financial assets at amortised cost	132,223
Financial assets measured at fair value through other comprehensive income	17
Loans and receivables		117,224	111,262
Loans and advances | 3 to 5 years
Assets
Financial assets at amortised cost	106,138
Financial assets measured at fair value through other comprehensive income	44
Loans and receivables		111,130	91,898
Loans and advances | More than five years
Assets
Financial assets at amortised cost	402,829
Financial assets measured at fair value through other comprehensive income	96
Loans and receivables		396,223	385,259
Loans and advances - Central banks
Assets
Financial assets at amortised cost	€ 15,601
Loans and receivables		€ 26,278	€ 27,973
Liabilities
Average interest rate - financial assets at amortised cost	4.63%
Average interest rate - financial assets		5.10%	6.54%
Loans and advances - Central banks | 1 month
Assets
Financial assets at amortised cost	€ 23
Loans and receivables		€ 3,948	€ 941
Loans and advances - Central banks | 3 months
Assets
Loans and receivables		1,446	11,499
Loans and advances - Central banks | 3 to 12 months
Assets
Financial assets at amortised cost	4
Loans and receivables		4,811	1,117
Loans and advances - Central banks | 3 to 5 years
Assets
Loans and receivables			23
Loans and advances - Central banks | More than five years
Assets
Financial assets at amortised cost	15,574
Loans and receivables		16,073	14,393
Loans and advances - Credit institutions
Assets
Financial assets at amortised cost	€ 35,480
Loans and receivables		€ 39,567	€ 35,424
Liabilities
Average interest rate - financial assets at amortised cost	1.66%
Average interest rate - financial assets		1.26%	1.96%
Loans and advances - Credit institutions | On demand
Assets
Financial assets at amortised cost	€ 10,092
Loans and receivables		€ 18,242	€ 16,632
Loans and advances - Credit institutions | 1 month
Assets
Financial assets at amortised cost	5,389
Loans and receivables		4,198	4,938
Loans and advances - Credit institutions | 3 months
Assets
Financial assets at amortised cost	6,711
Loans and receivables		3,445	2,210
Loans and advances - Credit institutions | 3 to 12 months
Assets
Financial assets at amortised cost	6,003
Loans and receivables		5,708	2,220
Loans and advances - Credit institutions | 1 to 3 years
Assets
Financial assets at amortised cost	5,314
Loans and receivables		5,694	4,435
Loans and advances - Credit institutions | 3 to 5 years
Assets
Financial assets at amortised cost	947
Loans and receivables		939	1,268
Loans and advances - Credit institutions | More than five years
Assets
Financial assets at amortised cost	1,024
Loans and receivables		1,341	3,721
Loans and advances - Customers
Assets
Financial assets at amortised cost	857,322
Financial assets measured at fair value through other comprehensive income	€ 1,601
Loans and receivables		€ 819,625	€ 763,370
Liabilities
Average interest rate - financial assets at fair value through other comprehensive income	1.41%
Average interest rate - financial assets at amortised cost	4.97%
Average interest rate - financial assets		5.44%	5.79%
Loans and advances - Customers | On demand
Assets
Financial assets at amortised cost	€ 36,139
Financial assets measured at fair value through other comprehensive income	1,399
Loans and receivables		€ 38,509	€ 35,632
Loans and advances - Customers | 1 month
Assets
Financial assets at amortised cost	49,872
Financial assets measured at fair value through other comprehensive income	1
Loans and receivables		49,159	40,913
Loans and advances - Customers | 3 months
Assets
Financial assets at amortised cost	63,597
Financial assets measured at fair value through other comprehensive income	1
Loans and receivables		47,330	42,308
Loans and advances - Customers | 3 to 12 months
Assets
Financial assets at amortised cost	89,383
Financial assets measured at fair value through other comprehensive income	43
Loans and receivables		84,097	79,938
Loans and advances - Customers | 1 to 3 years
Assets
Financial assets at amortised cost	126,909
Financial assets measured at fair value through other comprehensive income	17
Loans and receivables		111,530	106,827
Loans and advances - Customers | 3 to 5 years
Assets
Financial assets at amortised cost	105,191
Financial assets measured at fair value through other comprehensive income	44
Loans and receivables		110,191	90,607
Loans and advances - Customers | More than five years
Assets
Financial assets at amortised cost	386,231
Financial assets measured at fair value through other comprehensive income	96
Loans and receivables		378,809	367,145
Deposits
Liabilities
Financial liabilities at amortized cost	903,101	883,320	791,646	883,320
Undiscounted financial liabilities at amortised cost	898,084	878,077	789,637
Deposits | On demand
Liabilities
Financial liabilities at amortized cost	536,134	527,499	471,494
Undiscounted financial liabilities at amortised cost	532,915	526,059	467,529
Deposits | 1 month
Liabilities
Financial liabilities at amortized cost	74,440	59,325	79,446
Undiscounted financial liabilities at amortised cost	74,320	57,490	95,231
Deposits | 3 months
Liabilities
Financial liabilities at amortized cost	67,406	66,667	42,583
Undiscounted financial liabilities at amortised cost	67,169	89,249	49,246
Deposits | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	91,958	100,658	86,006
Undiscounted financial liabilities at amortised cost	91,766	99,780	68,830
Deposits | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	107,459	81,169	69,775
Undiscounted financial liabilities at amortised cost	106,935	64,977	66,255
Deposits | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	18,833	39,719	34,505
Undiscounted financial liabilities at amortised cost	18,439	32,365	34,781
Deposits | More than five years
Liabilities
Financial liabilities at amortized cost	6,871	8,283	7,837
Undiscounted financial liabilities at amortised cost	6,540	8,157	7,765
Deposits - Central banks
Liabilities
Financial liabilities at amortized cost	€ 72,523	€ 71,414	€ 44,112
Average interest rate - financial liabilities at amortised cost	0.39%
Average interest rate - financial liabilities		0.24%	0.26%
Undiscounted financial liabilities at amortised cost	€ 72,894	€ 71,512	€ 44,099
Deposits - Central banks | On demand
Liabilities
Financial liabilities at amortized cost	304	450	422
Undiscounted financial liabilities at amortised cost	304	451	422
Deposits - Central banks | 1 month
Liabilities
Financial liabilities at amortized cost	2,130	2,015	2,007
Undiscounted financial liabilities at amortised cost	2,126	2,018	2,006
Deposits - Central banks | 3 months
Liabilities
Financial liabilities at amortized cost	2,629	681	633
Undiscounted financial liabilities at amortised cost	2,624	23,801	633
Deposits - Central banks | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	507	2,715	101
Undiscounted financial liabilities at amortised cost	896	2,719	101
Deposits - Central banks | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	64,433	42,988	20,027
Undiscounted financial liabilities at amortised cost	64,424	27,138	20,021
Deposits - Central banks | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	2,520	22,565	20,922
Undiscounted financial liabilities at amortised cost	2,520	15,385	20,916
Deposits - Credit institutions
Liabilities
Financial liabilities at amortized cost	€ 89,679	€ 91,300	€ 89,764
Average interest rate - financial liabilities at amortised cost	2.19%
Average interest rate - financial liabilities		2.40%	3.97%
Undiscounted financial liabilities at amortised cost	€ 88,720	€ 89,147	€ 89,639
Deposits - Credit institutions | On demand
Liabilities
Financial liabilities at amortized cost	15,341	20,870	16,649
Undiscounted financial liabilities at amortised cost	15,257	20,378	16,676
Deposits - Credit institutions | 1 month
Liabilities
Financial liabilities at amortized cost	13,413	15,263	16,357
Undiscounted financial liabilities at amortised cost	13,413	14,903	15,789
Deposits - Credit institutions | 3 months
Liabilities
Financial liabilities at amortized cost	24,724	13,350	10,603
Undiscounted financial liabilities at amortised cost	24,698	13,035	15,500
Deposits - Credit institutions | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	16,384	25,406	23,313
Undiscounted financial liabilities at amortised cost	16,288	24,807	20,057
Deposits - Credit institutions | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	8,759	6,501	13,540
Undiscounted financial liabilities at amortised cost	8,552	6,348	12,364
Deposits - Credit institutions | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	6,412	5,247	5,560
Undiscounted financial liabilities at amortised cost	6,085	5,123	5,517
Deposits - Credit institutions | More than five years
Liabilities
Financial liabilities at amortized cost	4,646	4,663	3,742
Undiscounted financial liabilities at amortised cost	4,427	4,553	3,736
Deposits - Customers
Liabilities
Financial liabilities at amortized cost	€ 740,899	€ 720,606	€ 657,770
Average interest rate - financial liabilities at amortised cost	1.19%
Average interest rate - financial liabilities		2.00%	2.25%
Undiscounted financial liabilities at amortised cost	€ 736,470	€ 717,418	€ 655,899
Deposits - Customers | On demand
Liabilities
Financial liabilities at amortized cost	520,489	506,179	454,423
Undiscounted financial liabilities at amortised cost	517,354	505,230	450,431
Deposits - Customers | 1 month
Liabilities
Financial liabilities at amortized cost	58,897	42,047	61,082
Undiscounted financial liabilities at amortised cost	58,781	40,569	77,436
Deposits - Customers | 3 months
Liabilities
Financial liabilities at amortized cost	40,053	52,636	31,347
Undiscounted financial liabilities at amortised cost	39,847	52,413	33,113
Deposits - Customers | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	75,067	72,537	62,592
Undiscounted financial liabilities at amortised cost	74,582	72,254	48,672
Deposits - Customers | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	34,267	31,680	36,208
Undiscounted financial liabilities at amortised cost	33,959	31,491	33,870
Deposits - Customers | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	9,901	11,907	8,023
Undiscounted financial liabilities at amortised cost	9,834	11,857	8,348
Deposits - Customers | More than five years
Liabilities
Financial liabilities at amortized cost	2,225	3,620	4,095
Undiscounted financial liabilities at amortised cost	2,113	3,604	4,029
Marketable debt securities
Liabilities
Financial liabilities at amortized cost	€ 244,314	€ 214,910	€ 226,078	214,910
Average interest rate - financial liabilities at amortised cost	2.59%
Average interest rate - financial liabilities		2.56%	3.68%
Undiscounted financial liabilities at amortised cost	€ 240,533	€ 212,545	€ 219,346
Marketable debt securities | On demand
Liabilities
Financial liabilities at amortized cost	237	105	642
Undiscounted financial liabilities at amortised cost	296	1,486	623
Marketable debt securities | 1 month
Liabilities
Financial liabilities at amortized cost	11,347	11,927	12,861
Undiscounted financial liabilities at amortised cost	11,243	11,735	13,582
Marketable debt securities | 3 months
Liabilities
Financial liabilities at amortized cost	18,817	11,638	14,225
Undiscounted financial liabilities at amortised cost	17,359	11,387	12,705
Marketable debt securities | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	33,536	29,286	39,465
Undiscounted financial liabilities at amortised cost	33,443	28,412	38,119
Marketable debt securities | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	71,805	54,202	43,985
Undiscounted financial liabilities at amortised cost	71,431	52,989	42,201
Marketable debt securities | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	37,919	43,395	34,520
Undiscounted financial liabilities at amortised cost	37,409	42,888	34,022
Marketable debt securities | More than five years
Liabilities
Financial liabilities at amortized cost	70,653	64,357	80,380
Undiscounted financial liabilities at amortised cost	69,352	63,648	78,094
Other financial liabilities
Liabilities
Financial liabilities at amortized cost	24,215	27,839	26,516	€ 27,839
Undiscounted financial liabilities at amortised cost	24,215	27,839	26,516
Other financial liabilities | On demand
Liabilities
Financial liabilities at amortized cost	8,913	10,000	7,939
Undiscounted financial liabilities at amortised cost	8,913	10,001	7,939
Other financial liabilities | 1 month
Liabilities
Financial liabilities at amortized cost	1,995	3,909	3,276
Undiscounted financial liabilities at amortised cost	1,995	3,908	3,645
Other financial liabilities | 3 months
Liabilities
Financial liabilities at amortized cost	7,070	9,634	10,474
Undiscounted financial liabilities at amortised cost	7,070	9,634	10,097
Other financial liabilities | 3 to 12 months
Liabilities
Financial liabilities at amortized cost	2,028	728	303
Undiscounted financial liabilities at amortised cost	2,028	728	305
Other financial liabilities | 1 to 3 years
Liabilities
Financial liabilities at amortized cost	3,406	1,116	1,831
Undiscounted financial liabilities at amortised cost	3,406	1,116	1,837
Other financial liabilities | 3 to 5 years
Liabilities
Financial liabilities at amortized cost	175	428	442
Undiscounted financial liabilities at amortised cost	175	428	442
Other financial liabilities | More than five years
Liabilities
Financial liabilities at amortized cost	628	2,024	2,251
Undiscounted financial liabilities at amortised cost	€ 628	€ 2,024	€ 2,251

Other disclosures - Contractual

Other disclosures - Contractual maturities of liabilities at amortised cost (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Liabilities
Undiscounted financial liabilities at amortised cost	€ 1,162,832	€ 1,118,461	€ 1,035,499
On demand
Liabilities
Undiscounted financial liabilities at amortised cost	542,124	537,546	476,091
1 month
Liabilities
Undiscounted financial liabilities at amortised cost	87,558	73,133	112,458
3 months
Liabilities
Undiscounted financial liabilities at amortised cost	91,598	110,270	72,048
3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	127,237	128,920	107,254
1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	181,772	119,082	110,293
3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	56,023	75,681	69,245
More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	76,520	73,829	88,110
Deposits
Liabilities
Undiscounted financial liabilities at amortised cost	898,084	878,077	789,637
Deposits | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	532,915	526,059	467,529
Deposits | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	74,320	57,490	95,231
Deposits | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	67,169	89,249	49,246
Deposits | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	91,766	99,780	68,830
Deposits | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	106,935	64,977	66,255
Deposits | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	18,439	32,365	34,781
Deposits | More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	6,540	8,157	7,765
Deposits - Central banks
Liabilities
Undiscounted financial liabilities at amortised cost	72,894	71,512	44,099
Deposits - Central banks | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	304	451	422
Deposits - Central banks | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	2,126	2,018	2,006
Deposits - Central banks | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	2,624	23,801	633
Deposits - Central banks | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	896	2,719	101
Deposits - Central banks | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	64,424	27,138	20,021
Deposits - Central banks | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	2,520	15,385	20,916
Deposits - Credit institutions
Liabilities
Undiscounted financial liabilities at amortised cost	88,720	89,147	89,639
Deposits - Credit institutions | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	15,257	20,378	16,676
Deposits - Credit institutions | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	13,413	14,903	15,789
Deposits - Credit institutions | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	24,698	13,035	15,500
Deposits - Credit institutions | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	16,288	24,807	20,057
Deposits - Credit institutions | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	8,552	6,348	12,364
Deposits - Credit institutions | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	6,085	5,123	5,517
Deposits - Credit institutions | More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	4,427	4,553	3,736
Deposits - Customers
Liabilities
Undiscounted financial liabilities at amortised cost	736,470	717,418	655,899
Deposits - Customers | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	517,354	505,230	450,431
Deposits - Customers | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	58,781	40,569	77,436
Deposits - Customers | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	39,847	52,413	33,113
Deposits - Customers | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	74,582	72,254	48,672
Deposits - Customers | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	33,959	31,491	33,870
Deposits - Customers | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	9,834	11,857	8,348
Deposits - Customers | More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	2,113	3,604	4,029
Marketable debt securities
Liabilities
Undiscounted financial liabilities at amortised cost	240,533	212,545	219,346
Marketable debt securities | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	296	1,486	623
Marketable debt securities | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	11,243	11,735	13,582
Marketable debt securities | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	17,359	11,387	12,705
Marketable debt securities | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	33,443	28,412	38,119
Marketable debt securities | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	71,431	52,989	42,201
Marketable debt securities | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	37,409	42,888	34,022
Marketable debt securities | More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	69,352	63,648	78,094
Other financial liabilities
Liabilities
Undiscounted financial liabilities at amortised cost	24,215	27,839	26,516
Other financial liabilities | On demand
Liabilities
Undiscounted financial liabilities at amortised cost	8,913	10,001	7,939
Other financial liabilities | 1 month
Liabilities
Undiscounted financial liabilities at amortised cost	1,995	3,908	3,645
Other financial liabilities | 3 months
Liabilities
Undiscounted financial liabilities at amortised cost	7,070	9,634	10,097
Other financial liabilities | 3 to 12 months
Liabilities
Undiscounted financial liabilities at amortised cost	2,028	728	305
Other financial liabilities | 1 to 3 years
Liabilities
Undiscounted financial liabilities at amortised cost	3,406	1,116	1,837
Other financial liabilities | 3 to 5 years
Liabilities
Undiscounted financial liabilities at amortised cost	175	428	442
Other financial liabilities | More than five years
Liabilities
Undiscounted financial liabilities at amortised cost	€ 628	€ 2,024	€ 2,251

Other disclosures - Contractu_2

Other disclosures - Contractual maturities of rest of assets and liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Financial assets held for trading	€ 92,879	€ 125,618	€ 125,458	€ 148,187
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets available-for-sale			133,271	116,774
Hedging derivatives, Assets	8,607		8,537	10,377
Accumulated amount of fair value adjustments on the hedged item - Assets	1,088		1,287	1,481
TOTAL FINANCIAL ASSETS	173,435
Liabilities
Financial liabilities held for trading	70,343	107,634	107,624	108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Hedging derivatives, Liabilities	6,363	8,034	8,044	8,156
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	303	330	330	448
TOTAL LIABILITIES	145,067
1 month
Assets
Financial assets held for trading	4,512
Financial assets designated at fair value through profit or loss	21,598
Non-trading financial assets mandatorily at fair value through profit or loss	3,215
Hedging derivatives, Assets	609
Accumulated amount of fair value adjustments on the hedged item - Assets	106
TOTAL FINANCIAL ASSETS	30,040
Liabilities
Financial liabilities held for trading	10,473
Financial liabilities designated at fair value through profit or loss	29,574
Hedging derivatives, Liabilities	485
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	3
TOTAL LIABILITIES	40,535
3 months
Assets
Financial assets held for trading	3,564
Financial assets designated at fair value through profit or loss	13,045
Non-trading financial assets mandatorily at fair value through profit or loss	346
Hedging derivatives, Assets	166
Accumulated amount of fair value adjustments on the hedged item - Assets	7
TOTAL FINANCIAL ASSETS	17,128
Liabilities
Financial liabilities held for trading	3,351
Financial liabilities designated at fair value through profit or loss	7,017
Hedging derivatives, Liabilities	144
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	5
TOTAL LIABILITIES	10,517
3 to 12 months
Assets
Financial assets held for trading	6,793
Financial assets designated at fair value through profit or loss	5,625
Non-trading financial assets mandatorily at fair value through profit or loss	17
Hedging derivatives, Assets	474
Accumulated amount of fair value adjustments on the hedged item - Assets	20
TOTAL FINANCIAL ASSETS	12,929
Liabilities
Financial liabilities held for trading	1,104
Financial liabilities designated at fair value through profit or loss	864
Hedging derivatives, Liabilities	321
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	23
TOTAL LIABILITIES	2,312
1 to 3 years
Assets
Financial assets held for trading	22,084
Financial assets designated at fair value through profit or loss	5,215
Non-trading financial assets mandatorily at fair value through profit or loss	125
Hedging derivatives, Assets	2,167
Accumulated amount of fair value adjustments on the hedged item - Assets	28
TOTAL FINANCIAL ASSETS	29,619
Liabilities
Financial liabilities held for trading	16,123
Financial liabilities designated at fair value through profit or loss	1,497
Hedging derivatives, Liabilities	362
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	64
TOTAL LIABILITIES	18,046
3 to 5 years
Assets
Financial assets held for trading	19,350
Financial assets designated at fair value through profit or loss	4,065
Non-trading financial assets mandatorily at fair value through profit or loss	2
Hedging derivatives, Assets	957
Accumulated amount of fair value adjustments on the hedged item - Assets	59
TOTAL FINANCIAL ASSETS	24,433
Liabilities
Financial liabilities held for trading	16,457
Financial liabilities designated at fair value through profit or loss	999
Hedging derivatives, Liabilities	651
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	60
TOTAL LIABILITIES	18,167
More than five years
Assets
Financial assets held for trading	36,576
Financial assets designated at fair value through profit or loss	7,912
Non-trading financial assets mandatorily at fair value through profit or loss	7,025
Hedging derivatives, Assets	4,234
Accumulated amount of fair value adjustments on the hedged item - Assets	868
TOTAL FINANCIAL ASSETS	59,286
Liabilities
Financial liabilities held for trading	22,835
Financial liabilities designated at fair value through profit or loss	28,107
Hedging derivatives, Liabilities	4,400
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	148
TOTAL LIABILITIES	55,490
Derivatives
Liabilities
Financial liabilities held for trading	55,341	57,902	57,892	74,369
Derivatives | 1 month
Liabilities
Financial liabilities held for trading	2,897
Derivatives | 3 months
Liabilities
Financial liabilities held for trading	2,874
Derivatives | 3 to 12 months
Liabilities
Financial liabilities held for trading	822
Derivatives | 1 to 3 years
Liabilities
Financial liabilities held for trading	14,323
Derivatives | 3 to 5 years
Liabilities
Financial liabilities held for trading	14,956
Derivatives | More than five years
Liabilities
Financial liabilities held for trading	19,469
Short positions
Liabilities
Financial liabilities held for trading	15,002	20,979	20,979	23,005
Short positions | 1 month
Liabilities
Financial liabilities held for trading	7,576
Short positions | 3 months
Liabilities
Financial liabilities held for trading	477
Short positions | 3 to 12 months
Liabilities
Financial liabilities held for trading	282
Short positions | 1 to 3 years
Liabilities
Financial liabilities held for trading	1,800
Short positions | 3 to 5 years
Liabilities
Financial liabilities held for trading	1,501
Short positions | More than five years
Liabilities
Financial liabilities held for trading	3,366
Deposits
Liabilities
Financial liabilities held for trading		28,753	28,753	11,391
Financial liabilities designated at fair value through profit or loss	65,304	55,971	55,971	37,472
Deposits | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	29,522
Deposits | 3 months
Liabilities
Financial liabilities designated at fair value through profit or loss	6,947
Deposits | 3 to 12 months
Liabilities
Financial liabilities designated at fair value through profit or loss	627
Deposits | 1 to 3 years
Liabilities
Financial liabilities designated at fair value through profit or loss	531
Deposits | 3 to 5 years
Liabilities
Financial liabilities designated at fair value through profit or loss	455
Deposits | More than five years
Liabilities
Financial liabilities designated at fair value through profit or loss	27,222
Deposits - Central banks
Liabilities
Financial liabilities held for trading			282	1,351
Financial liabilities designated at fair value through profit or loss	14,816		8,860	9,112
Deposits - Central banks | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	9,804
Deposits - Central banks | 3 months
Liabilities
Financial liabilities designated at fair value through profit or loss	4,940
Deposits - Central banks | 3 to 12 months
Liabilities
Financial liabilities designated at fair value through profit or loss	72
Deposits - Credit institutions
Liabilities
Financial liabilities held for trading			292	44
Financial liabilities designated at fair value through profit or loss	10,891		18,166	5,015
Deposits - Credit institutions | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	8,809
Deposits - Credit institutions | 3 months
Liabilities
Financial liabilities designated at fair value through profit or loss	949
Deposits - Credit institutions | 3 to 12 months
Liabilities
Financial liabilities designated at fair value through profit or loss	271
Deposits - Credit institutions | 1 to 3 years
Liabilities
Financial liabilities designated at fair value through profit or loss	188
Deposits - Credit institutions | 3 to 5 years
Liabilities
Financial liabilities designated at fair value through profit or loss	229
Deposits - Credit institutions | More than five years
Liabilities
Financial liabilities designated at fair value through profit or loss	445
Deposits - Customers
Liabilities
Financial liabilities held for trading			28,179	9,996
Financial liabilities designated at fair value through profit or loss	39,597		28,945	23,345
Deposits - Customers | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	10,909
Deposits - Customers | 3 months
Liabilities
Financial liabilities designated at fair value through profit or loss	1,058
Deposits - Customers | 3 to 12 months
Liabilities
Financial liabilities designated at fair value through profit or loss	284
Deposits - Customers | 1 to 3 years
Liabilities
Financial liabilities designated at fair value through profit or loss	343
Deposits - Customers | 3 to 5 years
Liabilities
Financial liabilities designated at fair value through profit or loss	226
Deposits - Customers | More than five years
Liabilities
Financial liabilities designated at fair value through profit or loss	26,777
Marketable debt securities
Liabilities
Financial liabilities designated at fair value through profit or loss	2,305	3,056	3,056	2,791
Marketable debt securities | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	13
Marketable debt securities | 3 months
Liabilities
Financial liabilities designated at fair value through profit or loss	70
Marketable debt securities | 3 to 12 months
Liabilities
Financial liabilities designated at fair value through profit or loss	237
Marketable debt securities | 1 to 3 years
Liabilities
Financial liabilities designated at fair value through profit or loss	556
Marketable debt securities | 3 to 5 years
Liabilities
Financial liabilities designated at fair value through profit or loss	544
Marketable debt securities | More than five years
Liabilities
Financial liabilities designated at fair value through profit or loss	885
Other financial liabilities
Liabilities
Financial liabilities designated at fair value through profit or loss	449	589	589
Other financial liabilities | 1 month
Liabilities
Financial liabilities designated at fair value through profit or loss	39
Other financial liabilities | 1 to 3 years
Liabilities
Financial liabilities designated at fair value through profit or loss	410
Derivatives
Assets
Financial assets held for trading	55,939	57,243	57,243	72,043
Derivatives | 1 month
Assets
Financial assets held for trading	2,691
Derivatives | 3 months
Assets
Financial assets held for trading	3,165
Derivatives | 3 to 12 months
Assets
Financial assets held for trading	899
Derivatives | 1 to 3 years
Assets
Financial assets held for trading	15,189
Derivatives | 3 to 5 years
Assets
Financial assets held for trading	14,098
Derivatives | More than five years
Assets
Financial assets held for trading	19,897
Equity instruments
Assets
Financial assets held for trading	8,938	21,353	21,353	14,497
Financial assets designated at fair value through profit or loss			933	546
Non-trading financial assets mandatorily at fair value through profit or loss	3,260	2,584
Financial assets at fair value through other comprehensive income	2,671	3,169
Financial assets available-for-sale			4,790	5,487	€ 4,849
Equity instruments | More than five years
Assets
Financial assets held for trading	8,938
Non-trading financial assets mandatorily at fair value through profit or loss	3,260
Financial assets at fair value through other comprehensive income	2,671
Debt instruments
Assets
Financial assets held for trading	27,800	36,554	36,351	48,922
Financial assets designated at fair value through profit or loss	3,222	3,286	3,485	3,398
Non-trading financial assets mandatorily at fair value through profit or loss	5,587	1,792
Financial assets at fair value through other comprehensive income	116,819	122,077
Financial assets available-for-sale	118,420		128,481	111,287
Debt instruments | On demand
Assets
Financial assets available-for-sale			326	200
Debt instruments | 1 month
Assets
Financial assets held for trading	1,821
Financial assets designated at fair value through profit or loss	604
Non-trading financial assets mandatorily at fair value through profit or loss	1,876
Financial assets available-for-sale			2,467	5,986
Debt instruments | 3 months
Assets
Financial assets held for trading	399
Financial assets designated at fair value through profit or loss	7
Non-trading financial assets mandatorily at fair value through profit or loss	20
Financial assets available-for-sale			1,646	2,007
Debt instruments | 3 to 12 months
Assets
Financial assets held for trading	5,894
Financial assets designated at fair value through profit or loss	304
Financial assets available-for-sale			11,497	5,442
Debt instruments | 1 to 3 years
Assets
Financial assets held for trading	6,895
Financial assets designated at fair value through profit or loss	727
Financial assets available-for-sale			22,447	23,574
Debt instruments | 3 to 5 years
Assets
Financial assets held for trading	5,252
Financial assets designated at fair value through profit or loss	348
Non-trading financial assets mandatorily at fair value through profit or loss	2
Financial assets available-for-sale			11,164	13,900
Debt instruments | More than five years
Assets
Financial assets held for trading	7,539
Financial assets designated at fair value through profit or loss	1,232
Non-trading financial assets mandatorily at fair value through profit or loss	3,689
Financial assets available-for-sale			78,934	60,178
Loans and advances
Assets
Financial assets held for trading	202	10,468	10,511	12,725
Financial assets designated at fair value through profit or loss	54,238	38,789	30,364	27,665
Non-trading financial assets mandatorily at fair value through profit or loss	1,883	611
Financial assets at fair value through other comprehensive income	1,601	€ 1,107
Loans and advances | 1 month
Assets
Financial assets designated at fair value through profit or loss	20,994
Non-trading financial assets mandatorily at fair value through profit or loss	1,339
Loans and advances | 3 months
Assets
Financial assets designated at fair value through profit or loss	13,038
Non-trading financial assets mandatorily at fair value through profit or loss	326
Loans and advances | 3 to 12 months
Assets
Financial assets designated at fair value through profit or loss	5,321
Non-trading financial assets mandatorily at fair value through profit or loss	17
Loans and advances | 1 to 3 years
Assets
Financial assets designated at fair value through profit or loss	4,488
Non-trading financial assets mandatorily at fair value through profit or loss	125
Loans and advances | 3 to 5 years
Assets
Financial assets designated at fair value through profit or loss	3,717
Loans and advances | More than five years
Assets
Financial assets held for trading	202
Financial assets designated at fair value through profit or loss	6,680
Non-trading financial assets mandatorily at fair value through profit or loss	76
Loans and advances - Central banks
Assets
Financial assets designated at fair value through profit or loss	9,226
Loans and advances - Central banks | 1 month
Assets
Financial assets designated at fair value through profit or loss	1,211
Loans and advances - Central banks | 3 months
Assets
Financial assets designated at fair value through profit or loss	5,433
Loans and advances - Central banks | 3 to 12 months
Assets
Financial assets designated at fair value through profit or loss	2,582
Loans and advances - Credit institutions
Assets
Financial assets held for trading			1,696	3,221
Financial assets designated at fair value through profit or loss	23,097		9,889	10,069
Non-trading financial assets mandatorily at fair value through profit or loss	2
Loans and advances - Credit institutions | 1 month
Assets
Financial assets designated at fair value through profit or loss	14,587
Non-trading financial assets mandatorily at fair value through profit or loss	2
Loans and advances - Credit institutions | 3 months
Assets
Financial assets designated at fair value through profit or loss	4,131
Loans and advances - Credit institutions | 3 to 12 months
Assets
Financial assets designated at fair value through profit or loss	778
Loans and advances - Credit institutions | 1 to 3 years
Assets
Financial assets designated at fair value through profit or loss	1,327
Loans and advances - Credit institutions | 3 to 5 years
Assets
Financial assets designated at fair value through profit or loss	579
Loans and advances - Credit institutions | More than five years
Assets
Financial assets designated at fair value through profit or loss	1,695
Loans and advances - Customers
Assets
Financial assets held for trading	202		8,815	9,504
Financial assets designated at fair value through profit or loss	21,915		€ 20,475	€ 17,596
Non-trading financial assets mandatorily at fair value through profit or loss	1,881
Financial assets at fair value through other comprehensive income	1,601
Loans and advances - Customers | 1 month
Assets
Financial assets designated at fair value through profit or loss	5,196
Non-trading financial assets mandatorily at fair value through profit or loss	1,337
Loans and advances - Customers | 3 months
Assets
Financial assets designated at fair value through profit or loss	3,474
Non-trading financial assets mandatorily at fair value through profit or loss	326
Loans and advances - Customers | 3 to 12 months
Assets
Financial assets designated at fair value through profit or loss	1,961
Non-trading financial assets mandatorily at fair value through profit or loss	17
Loans and advances - Customers | 1 to 3 years
Assets
Financial assets designated at fair value through profit or loss	3,161
Non-trading financial assets mandatorily at fair value through profit or loss	125
Loans and advances - Customers | 3 to 5 years
Assets
Financial assets designated at fair value through profit or loss	3,138
Loans and advances - Customers | More than five years
Assets
Financial assets held for trading	202
Financial assets designated at fair value through profit or loss	4,985
Non-trading financial assets mandatorily at fair value through profit or loss	€ 76

Other Disclosures - Maturities

Other Disclosures - Maturities of contingent liabilities and commitments (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	€ 304,195
Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	11,723	€ 14,499	€ 17,244
Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	218,083	207,671	202,097
Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	74,389	€ 64,917	€ 57,055
1 month | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	132,391
1 month | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	2,100
1 month | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	71,860
1 month | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	58,431
3 months | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	15,659
3 months | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	1,737
3 months | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	12,436
3 months | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	1,486
3 to 12 months | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	33,360
3 to 12 months | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	4,437
3 to 12 months | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	22,749
3 to 12 months | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	6,174
1 to 3 years | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	40,010
1 to 3 years | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	1,728
1 to 3 years | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	35,632
1 to 3 years | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	2,650
3 to 5 years | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	47,737
3 to 5 years | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	1,029
3 to 5 years | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	43,205
3 to 5 years | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	3,503
More than five years | Contingent Liabilities And Contingent Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	35,038
More than five years | Financial Guarantees
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	692
More than five years | Loan commitments
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	32,201
More than five years | Other Commitments [Member]
Disclosure of detailed information about financial instruments [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	€ 2,145

Other disclosures - Equivalent

Other disclosures - Equivalent Euro value of assets and liabilities (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash, cash balances at Central Banks and other deposits on demand	€ 113,663	€ 110,995	€ 110,995	€ 76,454	€ 77,751
Financial assets held for trading	92,879	125,618	125,458	148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets available-for-sale			133,271	116,774
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets at amortised cost	946,099	909,094
Loans and receivables			903,013	840,004
Held-to-maturity investments			13,491	14,468
Investments accounted for using equity method	7,588	6,150	6,184	4,836	€ 3,251
Tangible assets	26,157		22,974	23,286
Intangible assets	28,560		28,683	29,421
Other assets	9,348		9,766	8,447
TOTAL ASSETS	1,459,271	1,443,069	1,444,305	1,339,125
Liabilities
Financial liabilities held for trading	70,343	107,634	107,624	108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Financial liabilities at amortized cost	1,171,630	1,126,069	1,126,069	1,044,240
Liabilities under insurance contracts and reinsurance contracts issued	765		1,117	652
Other liabilities	13,088		12,591	11,070
TOTAL LIABILITIES	1,351,910	€ 1,337,707	1,337,472	1,236,426
Non-Euro
Assets
Cash, cash balances at Central Banks and other deposits on demand	61,372		67,025	60,423
Financial assets held for trading	56,217		82,004	100,083
Non-trading financial assets mandatorily at fair value through profit or loss	8,231
Financial assets designated at fair value through profit or loss	32,244		7,322	6,965
Financial assets available-for-sale			65,691	68,370
Financial assets at fair value through other comprehensive income	67,926
Financial assets at amortised cost	598,629
Loans and receivables			553,301	571,829
Held-to-maturity investments			11,490	12,272
Investments accounted for using equity method	1,189		1,121	1,308
Tangible assets	19,903		15,971	16,957
Intangible assets	23,016		23,499	26,338
Other assets	24,506		23,695	27,961
TOTAL ASSETS	893,233		851,119	892,506
Liabilities
Financial liabilities held for trading	40,989		76,459	70,958
Financial liabilities designated at fair value through profit or loss	35,997		21,766	16,667
Financial liabilities at amortized cost	694,362		638,680	678,542
Liabilities under insurance contracts and reinsurance contracts issued	29		58	61
Other liabilities	20,567		20,989	23,169
TOTAL LIABILITIES	€ 791,944		€ 757,952	€ 789,397

Other disclosures - Fair value

Other disclosures - Fair value of financial assets not at fair value (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	€ 946,099		€ 916,504	€ 854,472
Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	952,108		926,739	861,236
Level 1 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	20,898		10,994	11,529
Level 2
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	140,659		124,178	146,991
Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	99,337		155,527	138,902
Level 3
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	4,473	€ 3,546	1,363	1,349	€ 2,481
Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	831,873		760,218	710,805
Loans and advances | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	908,403		885,470	826,767
Loans and advances | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	914,013		895,645	833,819
Loans and advances | Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	88,091		141,839	127,224
Loans and advances | Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	825,922		753,806	706,595
Debt instruments
Disclosure of fair value measurement of assets [line items]
Financial assets	191,124		199,351	191,312
Debt instruments | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	37,696		31,034	27,705
Debt instruments | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	38,095		31,094	27,417
Debt instruments | Level 1 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	20,898		10,994	11,529
Debt instruments | Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	11,246		13,688	11,678
Debt instruments | Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	€ 5,951		€ 6,412	€ 4,210

Other disclosures - Fair valu_2

Other disclosures - Fair value of financial liabilities not at fair value (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities	€ 187,909		€ 190,314	€ 149,398
Carrying amount
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities	1,171,630		1,126,069	1,044,240
Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	1,173,906		1,132,771	1,047,930
Level 1 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	72,945		52,896	43,306
Level 2
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	127,991		153,600	136,835
Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	445,567		316,448	276,627
Level 3
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	442	€ 196	196	86	€ 324
Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	655,394		763,427	727,997
Deposits | Carrying amount
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities	903,101		883,320	791,646
Deposits | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	902,680		883,880	792,172
Deposits | Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	302,414		177,147	90,271
Deposits | Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	600,266		706,733	701,901
Debt instruments and other financial liabilities | Carrying amount
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities	268,529		242,749	252,594
Debt instruments and other financial liabilities | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	271,226		248,891	255,758
Debt instruments and other financial liabilities | Level 1 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	72,945		52,896	43,306
Debt instruments and other financial liabilities | Level 2 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	143,153		139,301	186,356
Debt instruments and other financial liabilities | Level 3 | Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of fair value measurement of liabilities [line items]
Financial liabilities at fair value	€ 55,128		€ 56,694	€ 26,096

Other disclosures - Fair valu_3

Other disclosures - Fair value available-for-sale (Details) - Equity instruments - Financial assets available for sale, category - EUR (€) € in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure of fair value measurement of assets [line items]
Financial assets, at fair value	€ 1,211	€ 1,349
At cost
Disclosure of fair value measurement of assets [line items]
Financial assets, at fair value	€ 1,211	€ 1,349

Other disclosures - Exposure to

Other disclosures - Exposure to Europe's peripheral countries (Details) - Sovereign Risk - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of financial assets [line items]
Risk exposure	€ 138,901
Off-balance-sheet government debt securities	13,364	€ 11,673	€ 10,502
Off-balance-sheet other than derivatives contingent liabilities and commitments	5,622	3,596	5,449
SPAIN
Disclosure of financial assets [line items]
Risk exposure	49,640	62,637	45,893
Off-balance-sheet government debt securities	11,529	10,079	9,456
Off-balance-sheet other than derivatives contingent liabilities and commitments	4,870	3,010	5,349
PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	8,753	8,817	7,072
Off-balance-sheet government debt securities	1,415	1,163	717
Off-balance-sheet other than derivatives contingent liabilities and commitments	366	146	91
ITALY
Disclosure of financial assets [line items]
Risk exposure	261	6,108	1,952
Off-balance-sheet government debt securities	418	431	329
Off-balance-sheet other than derivatives contingent liabilities and commitments	386	440	9
IRELAND
Disclosure of financial assets [line items]
Off-balance-sheet government debt securities	2
Debt instruments | Banco Popular Espanol, S.A.
Disclosure of financial assets [line items]
Risk exposure	19,601
Loans and advances - Customers
Disclosure of financial assets [line items]
Other comprehensive income	34	31	27
Loans and advances - Customers | SPAIN
Disclosure of financial assets [line items]
Risk exposure	13,615	16,470	14,127
Loans and advances - Customers | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	3,725	3,309	930
Loans and advances - Customers | ITALY
Disclosure of financial assets [line items]
Risk exposure	80	16	7
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure - long positions	3,601	6,940	8,943
Risk exposure effect of short positions	(2,458)	(2,012)	(4,086)
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure - long positions	72	208	154
Risk exposure effect of short positions	(115)	(155)	(212)
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure - long positions	477	1,962	2,211
Risk exposure effect of short positions	(681)	(483)	(758)
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member]
Disclosure of financial assets [line items]
Risk exposure	898
Financial assets at fair value through other comprehensive income, category
Disclosure of financial assets [line items]
Risk exposure	81,883
Financial assets at fair value through other comprehensive income, category | SPAIN
Disclosure of financial assets [line items]
Risk exposure	27,078
Financial assets at fair value through other comprehensive income, category | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	4,794
Financial assets at fair value through other comprehensive income, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	27,078
Financial assets at fair value through other comprehensive income, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	4,794
Financial assets available for sale, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure		37,748	23,415
Financial assets available for sale, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		5,220	5,982
Financial assets available for sale, category | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure		4,613	492
Financial assets at amortised cost, category
Disclosure of financial assets [line items]
Risk exposure	45,845
Financial assets at amortised cost, category | SPAIN
Disclosure of financial assets [line items]
Risk exposure	21,419
Financial assets at amortised cost, category | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	4,002
Financial assets at amortised cost, category | ITALY
Disclosure of financial assets [line items]
Risk exposure	465
Financial assets at amortised cost, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	7,804
Financial assets at amortised cost, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	277
Financial assets at amortised cost, category | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure	385
Loans and receivables, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure		1,585	1,516
Loans and receivables, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		232	214
Held-to-maturity investments, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure		1,906	1,978
Held-to-maturity investments, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		3	4
Hedging derivatives, category | Other Than Credit Default Swaps | SPAIN
Disclosure of financial assets [line items]
Risk exposure effect of short positions		(21)	(176)
Risk exposure	407
Hedging derivatives, category | Other Than Credit Default Swaps | ITALY
Disclosure of financial assets [line items]
Risk exposure effect of short positions		(5)	(2)
Risk exposure	87
Hedging derivatives, category | Other Than Credit Default Swaps | IRELAND
Disclosure of financial assets [line items]
Risk exposure	€ 2
Hedging derivatives, category | Credit default swap | ITALY
Disclosure of financial assets [line items]
Risk exposure		€ 5	€ 2

Other disclosures - Other expos

Other disclosures - Other exposure to other counterparties (Details) - Other Counterparties Risk - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Banco Popular Espanol, S.A.
Disclosure of financial assets [line items]
Risk exposure	€ 83,625
Off-balance-sheet other than derivatives contingent liabilities and commitments	15,460
SPAIN
Disclosure of financial assets [line items]
Risk exposure	258,075	€ 262,286	€ 172,033
Off-balance-sheet other than derivatives contingent liabilities and commitments	81,072	76,691	64,522
PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	38,887	41,626	34,150
Off-balance-sheet other than derivatives contingent liabilities and commitments	8,936	8,158	6,993
ITALY
Disclosure of financial assets [line items]
Risk exposure	17,896	13,896	8,568
Off-balance-sheet other than derivatives contingent liabilities and commitments	4,310	5,193	3,364
Greece
Disclosure of financial assets [line items]
Risk exposure	80	56	47
Off-balance-sheet other than derivatives contingent liabilities and commitments	200	200	268
IRELAND
Disclosure of financial assets [line items]
Risk exposure	11,788	3,061	1,503
Off-balance-sheet other than derivatives contingent liabilities and commitments	714	850	369
Loans and advances - Customers
Disclosure of financial assets [line items]
Other comprehensive income and impairment losses recognized	10,653	9,385	8,692
Loans and advances - Customers | Banco Popular Espanol, S.A.
Disclosure of financial assets [line items]
Other comprehensive income and impairment losses recognized	3,986
Loans and advances - Customers | SPAIN
Disclosure of financial assets [line items]
Risk exposure	202,149	210,976	147,246
Loans and advances - Customers | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	33,596	35,650	28,809
Loans and advances - Customers | ITALY
Disclosure of financial assets [line items]
Risk exposure	10,830	10,015	6,992
Loans and advances - Customers | Greece
Disclosure of financial assets [line items]
Risk exposure	80	56	47
Loans and advances - Customers | IRELAND
Disclosure of financial assets [line items]
Risk exposure	10,633	1,981	985
Cash, Cash Balance At Central Banks And Other Deposits On Demand | SPAIN
Disclosure of financial assets [line items]
Risk exposure	42,655	36,091	9,640
Cash, Cash Balance At Central Banks And Other Deposits On Demand | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	1,369	761	655
Cash, Cash Balance At Central Banks And Other Deposits On Demand | ITALY
Disclosure of financial assets [line items]
Risk exposure	51	17	26
Reverse repurchase agreements | SPAIN
Disclosure of financial assets [line items]
Risk exposure	8,117	6,932	8,550
Reverse repurchase agreements | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		178
Reverse repurchase agreements | ITALY
Disclosure of financial assets [line items]
Risk exposure	6,296	2,416
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	412	623	1,223
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	11	160	84
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure	84	438	818
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure	21	20	45
Financial assets at fair value through other comprehensive income, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	1,760
Financial assets at fair value through other comprehensive income, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	90
Financial assets at fair value through other comprehensive income, category | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure	635
Financial assets at fair value through other comprehensive income, category | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure	1,093
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	320
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure	16
Financial assets at amortised cost, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure	2,662
Financial assets at amortised cost, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	3,821
Financial assets at amortised cost, category | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure	25
Financial assets available for sale, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure		4,784	4,663
Financial assets available for sale, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		764	426
Financial assets available for sale, category | Debt instruments | ITALY
Disclosure of financial assets [line items]
Risk exposure		1,010	732
Financial assets available for sale, category | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure		476	396
Loans and receivables, category | Debt instruments | SPAIN
Disclosure of financial assets [line items]
Risk exposure		2,880	711
Loans and receivables, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		4,007	3,936
Loans and receivables, category | Debt instruments | IRELAND
Disclosure of financial assets [line items]
Risk exposure		584	77
Held-to-maturity investments, category | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure			240
Held-to-maturity investments, category | Debt instruments | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		106
Hedging derivatives, category | Other Than Credit Default Swaps | SPAIN
Disclosure of financial assets [line items]
Risk exposure	3,880	2,299	2,977
Hedging derivatives, category | Other Than Credit Default Swaps | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	1,132	1,416	1,600
Hedging derivatives, category | Other Than Credit Default Swaps | ITALY
Disclosure of financial assets [line items]
Risk exposure	253	211	161
Hedging derivatives, category | Other Than Credit Default Swaps | Greece
Disclosure of financial assets [line items]
Risk exposure	28	30	34
Hedging derivatives, category | Other Than Credit Default Swaps | IRELAND
Disclosure of financial assets [line items]
Risk exposure	127	79	690
Hedging derivatives, category | Credit default swap | SPAIN
Disclosure of financial assets [line items]
Risk exposure		2
Risk exposure effect of short positions	€ (6)		(16)
Hedging derivatives, category | Credit default swap | ITALY
Disclosure of financial assets [line items]
Risk exposure		€ 5	€ 6

Other disclosures - Credit defa

Other disclosures - Credit default swaps (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instruments
Notional amount	€ 318,807
Hedging derivatives, category | SPAIN | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial assets, at fair value		€ 2
Hedging derivatives, category | SPAIN | Hedging derivatives, category | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value	(6)		€ (16)
Hedging derivatives, category | SPAIN | IFRS Long [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	151	324	534
Hedging derivatives, category | SPAIN | IFRS Long [Member] | Hedging derivatives, category | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value	(2)	(3)	(3)
Hedging derivatives, category | SPAIN | IFRS Short [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	382	499	751
Financial assets, at fair value		5
Hedging derivatives, category | SPAIN | IFRS Short [Member] | Hedging derivatives, category | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value	(4)		(13)
Hedging derivatives, category | SPAIN | Net Short Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	231	175	217
Hedging derivatives, category | PORTUGAL | IFRS Long [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	26	25	28
Financial assets, at fair value			1
Hedging derivatives, category | PORTUGAL | IFRS Long [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount		1
Hedging derivatives, category | PORTUGAL | IFRS Long [Member] | Hedging derivatives, category | Sovereign Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value		(1)
Hedging derivatives, category | PORTUGAL | IFRS Short [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	26	128	290
Financial assets, at fair value		1
Hedging derivatives, category | PORTUGAL | IFRS Short [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount		1	6
Hedging derivatives, category | PORTUGAL | IFRS Short [Member] | Hedging derivatives, category | Sovereign Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value			(1)
Hedging derivatives, category | PORTUGAL | Net Short Position [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount		103	262
Hedging derivatives, category | PORTUGAL | Net Short Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount			6
Hedging derivatives, category | ITALY | Sovereign Risk | Credit default swap
Debt Instruments
Financial assets, at fair value		5	2
Hedging derivatives, category | ITALY | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial assets, at fair value		5	6
Hedging derivatives, category | ITALY | IFRS Long [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount		25	78
Hedging derivatives, category | ITALY | IFRS Long [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	205	225	317
Hedging derivatives, category | ITALY | IFRS Long [Member] | Hedging derivatives, category | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value	(5)	(3)	(1)
Hedging derivatives, category | ITALY | IFRS Short [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	265	450	503
Financial assets, at fair value		5	2
Hedging derivatives, category | ITALY | IFRS Short [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	75	201	362
Financial assets, at fair value	5	8	7
Hedging derivatives, category | ITALY | Net Long Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount		24
Hedging derivatives, category | ITALY | Net Short Position [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	265	€ 425	425
Hedging derivatives, category | ITALY | Net Short Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	€ 130		€ 45

Geographical and business seg_3

Geographical and business segment reporting - Geographical segments (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)itemsegment	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Jan. 02, 2018EUR (€)	Dec. 31, 2015EUR (€)
Geographical segments
Number of operating segments | segment	5
Number of operating areas | item	4
(Condensed) balance sheet
TOTAL ASSETS	€ 1,459,271	€ 1,444,305	€ 1,339,125	€ 1,443,069
Loans and advances to customers	882,921	848,915	790,470
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	197,069	188,425	153,141
Debt instruments	191,124	199,351	191,312
Other financial Assets	70,808	84,319	92,573
Other asset accounts	117,349	123,295	111,629
TOTAL LIABILITIES	1,351,910	1,337,472	1,236,426	1,337,707
Customer deposits	780,496	777,730	691,111
Central Banks and Credit institutions	187,909	190,314	149,398
Debt instruments	246,619	217,966	228,869
Other financial liabilities	95,007	107,299	123,890
Other liabilities accounts	41,879	44,163	43,158
Total Equity	107,361	106,833	102,699	€ 105,362	€ 98,753
Other customer funds under management	157,855	166,574	159,260
Investment funds	127,564	135,749	129,930
Pension funds	11,160	11,566	11,298
Assets under management	19,131	19,259	18,032
Customer funds under management	42,211	41,398	23,247
(Condensed) income statement
Net interest income	34,341	34,296	31,089
Net fee and commission income (expense)	11,485	11,597	10,180
Gains (losses) on financial transactions	1,797	1,665	2,101
Other operating income (segments)	801	797	862
Total income	48,424	48,355	44,232
Administrative expenses and depreciation	(22,779)	(22,993)	(21,101)
Profit from operations	25,645	25,362	23,131
Net loan loss provisions	(8,873)	(9,209)	(9,518)
Other income and charges	(2,571)	(4,062)	(2,845)
Operating profit / (loss) before tax	14,201	12,091	10,768
Income tax	(4,886)	(3,884)	(3,282)
Profit from continuing operations	9,315	8,207	7,486
CONSOLIDATED PROFIT FOR THE YEAR	9,315	8,207	7,486
Profit attributable to non-controlling interests	1,505	1,588	1,282
PROFIT ATTRIBUTABLE TO THE PARENT	7,810	6,619	6,204
Release presented in net loan loss provision instead of other gains (losses) and provisions for segment presentation	113	50	108
Operating segment
(Condensed) income statement
Net interest income	34,341	34,296	31,089
Net fee and commission income (expense)	11,485	11,597	10,180
Gains (losses) on financial transactions	1,797	1,704	1,723
Other operating income (segments)	801	797	862
Total income	48,424	48,394	43,854
Administrative expenses and depreciation	(22,779)	(22,917)	(21,087)
Profit from operations	25,645	25,477	22,767
Net loan loss provisions	(8,873)	(9,111)	(9,518)
Other income and charges	(1,995)	(2,813)	(1,960)
Operating profit / (loss) before tax	14,777	13,553	11,289
Income tax	(5,230)	(4,588)	(3,396)
Profit from continuing operations	9,547	8,965	7,893
CONSOLIDATED PROFIT FOR THE YEAR	9,547	8,965	7,893
Profit attributable to non-controlling interests	1,483	1,449	1,272
PROFIT ATTRIBUTABLE TO THE PARENT	8,064	7,516	6,621
Intra-Group eliminations
(Condensed) balance sheet
TOTAL ASSETS	(150,002)	(134,881)	(126,282)
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	(68,891)	(53,089)	(47,744)
Other asset accounts	(81,111)	(81,792)	(78,538)
TOTAL LIABILITIES	(68,890)	(53,089)	(47,745)
Central Banks and Credit institutions	(68,890)	(53,089)	(47,745)
Total Equity	(81,112)	(81,792)	(78,537)
(Condensed) income statement
Gains (losses) on financial transactions		(39)	378
Total income		(39)	378
Administrative expenses and depreciation		(76)	(14)
Profit from operations		(115)	364
Net loan loss provisions		(98)
Other income and charges	(576)	(1,249)	(885)
Operating profit / (loss) before tax	(576)	(1,462)	(521)
Income tax	344	704	114
CONSOLIDATED PROFIT FOR THE YEAR	(232)	(758)	(407)
Profit attributable to non-controlling interests	22	139	10
PROFIT ATTRIBUTABLE TO THE PARENT	(254)	(897)	(417)
Continental Europe
(Condensed) income statement
Net interest income	10,107	9,230	8,161
Net fee and commission income (expense)	4,419	4,167	3,497
Gains (losses) on financial transactions	915	626	818
Other operating income (segments)	441	394	330
Total income	15,882	14,417	12,806
Administrative expenses and depreciation	(8,279)	(7,661)	(6,781)
Profit from operations	7,603	6,756	6,025
Net loan loss provisions	(1,399)	(1,109)	(1,342)
Other income and charges	(703)	(746)	(671)
Operating profit / (loss) before tax	5,501	4,901	4,012
Income tax	(1,461)	(1,316)	(1,083)
Profit from continuing operations	4,040	3,585	2,929
CONSOLIDATED PROFIT FOR THE YEAR	4,040	3,585	2,929
Profit attributable to non-controlling interests	397	383	330
PROFIT ATTRIBUTABLE TO THE PARENT	3,643	3,202	2,599
Continental Europe | Operating segment
(Condensed) balance sheet
TOTAL ASSETS	681,887	678,122	520,134
Loans and advances to customers	383,020	380,081	297,214
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	142,813	114,965	77,232
Debt instruments	89,030	99,728	80,639
Other financial Assets	36,012	39,918	40,689
Other asset accounts	31,012	43,430	24,360
TOTAL LIABILITIES	642,479	636,784	486,644
Customer deposits	369,730	352,549	269,934
Central Banks and Credit institutions	158,762	159,794	105,152
Debt instruments	62,018	61,214	53,064
Other financial liabilities	37,142	45,919	49,042
Other liabilities accounts	14,827	17,308	9,452
Total Equity	39,408	41,338	33,490
Other customer funds under management	69,219	74,314	65,834
Investment funds	48,030	52,319	46,229
Pension funds	11,062	11,566	11,298
Assets under management	10,127	10,429	8,307
Customer funds under management	28,555	27,790	7,790
United Kingdom
(Condensed) income statement
Net interest income	4,136	4,364	4,405
Net fee and commission income (expense)	1,023	1,003	1,031
Gains (losses) on financial transactions	199	282	319
Other operating income (segments)	62	67	61
Total income	5,420	5,716	5,816
Administrative expenses and depreciation	(2,995)	(2,862)	(2,967)
Profit from operations	2,425	2,854	2,849
Net loan loss provisions	(173)	(205)	(58)
Other income and charges	(326)	(465)	(340)
Operating profit / (loss) before tax	1,926	2,184	2,451
Income tax	(539)	(661)	(735)
Profit from continuing operations	1,387	1,523	1,716
CONSOLIDATED PROFIT FOR THE YEAR	1,387	1,523	1,716
Profit attributable to non-controlling interests	25	25	36
PROFIT ATTRIBUTABLE TO THE PARENT	1,362	1,498	1,680
United Kingdom | Operating segment
(Condensed) balance sheet
TOTAL ASSETS	349,353	361,230	354,960
Loans and advances to customers	257,284	243,616	251,251
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	39,843	56,762	36,643
Debt instruments	29,190	26,188	28,045
Other financial Assets	13,398	24,690	26,819
Other asset accounts	9,638	9,974	12,202
TOTAL LIABILITIES	332,137	344,926	337,945
Customer deposits	210,388	230,504	212,113
Central Banks and Credit institutions	33,429	27,833	21,590
Debt instruments	67,556	61,112	71,108
Other financial liabilities	16,583	21,167	27,913
Other liabilities accounts	4,181	4,310	5,221
Total Equity	17,216	16,304	17,015
Other customer funds under management	7,672	8,657	8,564
Investment funds	7,576	8,543	8,446
Assets under management	96	114	118
Latin America
(Condensed) income statement
Net interest income	15,654	15,984	13,345
Net fee and commission income (expense)	5,253	5,494	4,581
Gains (losses) on financial transactions	600	1,014	806
Other operating income (segments)	(306)	30	32
Total income	21,201	22,522	18,764
Administrative expenses and depreciation	(7,995)	(8,720)	(7,692)
Profit from operations	13,206	13,802	11,072
Net loan loss provisions	(4,567)	(4,972)	(4,911)
Other income and charges	(667)	(1,330)	(785)
Operating profit / (loss) before tax	7,972	7,500	5,376
Income tax	(2,904)	(2,386)	(1,362)
Profit from continuing operations	5,068	5,114	4,014
CONSOLIDATED PROFIT FOR THE YEAR	5,068	5,114	4,014
Profit attributable to non-controlling interests	840	817	628
PROFIT ATTRIBUTABLE TO THE PARENT	4,228	4,297	3,386
Latin America | Operating segment
(Condensed) balance sheet
TOTAL ASSETS	303,356	293,347	320,768
Loans and advances to customers	150,544	147,929	152,187
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	60,721	56,087	67,400
Debt instruments	59,367	57,824	63,314
Other financial Assets	14,994	14,226	18,696
Other asset accounts	17,730	17,281	19,171
TOTAL LIABILITIES	276,095	264,415	291,454
Customer deposits	142,576	143,266	143,747
Central Banks and Credit institutions	48,103	39,613	47,585
Debt instruments	37,698	34,435	47,436
Other financial liabilities	36,851	36,085	41,395
Other liabilities accounts	10,867	11,016	11,291
Total Equity	27,261	28,932	29,314
Other customer funds under management	78,194	80,732	81,034
Investment funds	71,439	74,435	74,554
Pension funds	98
Assets under management	6,657	6,297	6,480
Customer funds under management	128	47	448
United States
(Condensed) income statement
Net interest income	5,391	5,569	5,917
Net fee and commission income (expense)	859	971	1,102
Gains (losses) on financial transactions	72	9	22
Other operating income (segments)	627	410	492
Total income	6,949	6,959	7,533
Administrative expenses and depreciation	(3,015)	(3,198)	(3,197)
Profit from operations	3,934	3,761	4,336
Net loan loss provisions	(2,618)	(2,780)	(3,208)
Other income and charges	(199)	(90)	(90)
Operating profit / (loss) before tax	1,117	891	1,038
Income tax	(347)	(256)	(357)
Profit from continuing operations	770	635	681
CONSOLIDATED PROFIT FOR THE YEAR	770	635	681
Profit attributable to non-controlling interests	218	227	286
PROFIT ATTRIBUTABLE TO THE PARENT	552	408	395
United States | Operating segment
(Condensed) balance sheet
TOTAL ASSETS	135,043	114,388	137,391
Loans and advances to customers	85,564	71,963	85,389
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	16,442	13,300	16,970
Debt instruments	13,160	13,843	17,940
Other financial Assets	4,292	3,368	3,566
Other asset accounts	15,585	11,914	13,526
TOTAL LIABILITIES	118,532	99,189	120,741
Customer deposits	57,568	51,189	64,460
Central Banks and Credit institutions	16,504	15,884	22,264
Debt instruments	37,564	26,176	26,340
Other financial liabilities	3,098	2,503	2,907
Other liabilities accounts	3,798	3,437	4,770
Total Equity	16,511	15,199	16,650
Other customer funds under management	2,763	2,871	3,828
Investment funds	512	452	701
Assets under management	2,251	2,419	3,127
Customer funds under management	13,528	13,561	14,999
Corporate center
(Condensed) income statement
Net interest income	(947)	(851)	(739)
Net fee and commission income (expense)	(69)	(38)	(31)
Gains (losses) on financial transactions	11	(227)	(242)
Other operating income (segments)	(23)	(104)	(53)
Total income	(1,028)	(1,220)	(1,065)
Administrative expenses and depreciation	(495)	(476)	(450)
Profit from operations	(1,523)	(1,696)	(1,515)
Net loan loss provisions	(116)	(45)	1
Other income and charges	(100)	(182)	(74)
Operating profit / (loss) before tax	(1,739)	(1,923)	(1,588)
Income tax	21	31	141
Profit from continuing operations	(1,718)	(1,892)	(1,447)
CONSOLIDATED PROFIT FOR THE YEAR	(1,718)	(1,892)	(1,447)
Profit attributable to non-controlling interests	3	(3)	(8)
PROFIT ATTRIBUTABLE TO THE PARENT	(1,721)	(1,889)	(1,439)
Corporate center | Operating segment
(Condensed) balance sheet
TOTAL ASSETS	139,634	132,099	132,154
Loans and advances to customers	6,509	5,326	4,429
Cash, Cash balances at Central Banks and other deposits on demand, Central Banks and Credit institutions	6,141	400	2,640
Debt instruments	377	1,768	1,374
Other financial Assets	2,112	2,117	2,803
Other asset accounts	124,495	122,488	120,908
TOTAL LIABILITIES	51,557	45,247	47,387
Customer deposits	234	222	857
Central Banks and Credit institutions	1	279	552
Debt instruments	41,783	35,029	30,921
Other financial liabilities	1,333	1,625	2,633
Other liabilities accounts	8,206	8,092	12,424
Total Equity	88,077	€ 86,852	84,767
Other customer funds under management	7
Investment funds	€ 7
Customer funds under management			€ 10

Geographical and business seg_4

Geographical and business segment reporting - Business segments (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business segments
Net interest income	€ 34,341	€ 34,296	€ 31,089
Income from equity instruments	370	384	413
Income from companies accounted for using the equity method	737	704	444
Net fee and commission income (expense)	11,485	11,597	10,180
Gains (losses) on financial transactions	1,797	1,665	2,101
Other operating income (segments)	801	797	862
Total income	48,424	48,355	44,232
Administrative expenses and depreciation	(22,779)	(22,993)	(21,101)
Profit from operations	25,645	25,362	23,131
Net loan loss provisions	(8,873)	(9,209)	(9,518)
Other non-financial gains/(losses)	(2,571)	(4,062)	(2,845)
Operating profit / (loss) before tax	14,201	12,091	10,768
Income tax	(4,886)	(3,884)	(3,282)
Profit from continuing operations	9,315	8,207	7,486
CONSOLIDATED PROFIT FOR THE YEAR	9,315	8,207	7,486
Profit attributable to non-controlling interests	1,505	1,588	1,282
Profit attributable to the parent	7,810	6,619	6,204
Release presented in net loan loss provision instead of other gains (losses) and provisions for segment presentation	113	50	108
Retail Banking Segment [Member]
Business segments
Net interest income	32,523	32,339	28,914
Net fee and commission income (expense)	8,945	9,306	8,206
Gains (losses) on financial transactions	720	681	668
Other operating income (segments)	645	580	536
Total income	42,833	42,906	38,324
Administrative expenses and depreciation	(19,256)	(19,677)	(18,036)
Profit from operations	23,577	23,229	20,288
Net loan loss provisions	(8,461)	(8,278)	(8,673)
Other non-financial gains/(losses)	(1,707)	(2,395)	(1,682)
Operating profit / (loss) before tax	13,409	12,556	9,933
Income tax	(4,329)	(3,843)	(2,734)
Profit from continuing operations	9,080	8,713	7,199
CONSOLIDATED PROFIT FOR THE YEAR	9,080	8,713	7,199
Profit attributable to non-controlling interests	1,287	1,258	1,089
Profit attributable to the parent	7,793	7,455	6,110
Corporate And Investment Banking Segment [Member]
Business segments
Net interest income	2,378	2,442	2,528
Net fee and commission income (expense)	1,512	1,627	1,407
Gains (losses) on financial transactions	1,004	1,212	1,256
Other operating income (segments)	193	222	289
Total income	5,087	5,503	5,480
Administrative expenses and depreciation	(2,105)	(2,028)	(1,917)
Profit from operations	2,982	3,475	3,563
Net loan loss provisions	(217)	(690)	(658)
Other non-financial gains/(losses)	(108)	(72)	(76)
Operating profit / (loss) before tax	2,657	2,713	2,829
Income tax	(792)	(750)	(787)
Profit from continuing operations	1,865	1,963	2,042
CONSOLIDATED PROFIT FOR THE YEAR	1,865	1,963	2,042
Profit attributable to non-controlling interests	160	183	174
Profit attributable to the parent	1,705	1,780	1,868
Wealth Management Segment [Member]
Business segments
Net interest income	420	404	429
Net fee and commission income (expense)	1,097	700	597
Gains (losses) on financial transactions	62	38	32
Other operating income (segments)	(37)	70	18
Total income	1,542	1,212	1,076
Administrative expenses and depreciation	(729)	(528)	(473)
Profit from operations	813	684	603
Net loan loss provisions	(9)	(9)	(22)
Other non-financial gains/(losses)	(7)	(8)	(5)
Operating profit / (loss) before tax	797	667	576
Income tax	(234)	(165)	(153)
Profit from continuing operations	563	502	423
CONSOLIDATED PROFIT FOR THE YEAR	563	502	423
Profit attributable to non-controlling interests	35	24	14
Profit attributable to the parent	528	478	409
Real estate operations in Spain
Business segments
Net interest income	(33)	(38)	(43)
Net fee and commission income (expense)		2	1
Gains (losses) on financial transactions			9
Other operating income (segments)	23	29	72
Total income	(10)	(7)	39
Administrative expenses and depreciation	(194)	(208)	(211)
Profit from operations	(204)	(215)	(172)
Net loan loss provisions	(70)	(88)	(167)
Other non-financial gains/(losses)	(73)	(157)	(122)
Operating profit / (loss) before tax	(347)	(460)	(461)
Income tax	104	139	137
Profit from continuing operations	(243)	(321)	(324)
CONSOLIDATED PROFIT FOR THE YEAR	(243)	(321)	(324)
Profit attributable to non-controlling interests	(2)	(13)	3
Profit attributable to the parent	(241)	(308)	(327)
Corporate product center
Business segments
Net interest income	(947)	(851)	(739)
Net fee and commission income (expense)	(69)	(38)	(31)
Gains (losses) on financial transactions	11	(227)	(242)
Other operating income (segments)	(23)	(104)	(53)
Total income	(1,028)	(1,220)	(1,065)
Administrative expenses and depreciation	(495)	(476)	(450)
Profit from operations	(1,523)	(1,696)	(1,515)
Net loan loss provisions	(116)	(46)	2
Other non-financial gains/(losses)	(100)	(181)	(75)
Operating profit / (loss) before tax	(1,739)	(1,923)	(1,588)
Income tax	21	31	141
Profit from continuing operations	(1,718)	(1,892)	(1,447)
CONSOLIDATED PROFIT FOR THE YEAR	(1,718)	(1,892)	(1,447)
Profit attributable to non-controlling interests	3	(3)	(8)
Profit attributable to the parent	(1,721)	(1,889)	(1,439)
Operating segment
Business segments
Net interest income	34,341	34,296	31,089
Net fee and commission income (expense)	11,485	11,597	10,180
Gains (losses) on financial transactions	1,797	1,704	1,723
Other operating income (segments)	801	797	862
Total income	48,424	48,394	43,854
Administrative expenses and depreciation	(22,779)	(22,917)	(21,087)
Profit from operations	25,645	25,477	22,767
Net loan loss provisions	(8,873)	(9,111)	(9,518)
Other non-financial gains/(losses)	(1,995)	(2,813)	(1,960)
Operating profit / (loss) before tax	14,777	13,553	11,289
Income tax	(5,230)	(4,588)	(3,396)
Profit from continuing operations	9,547	8,965	7,893
CONSOLIDATED PROFIT FOR THE YEAR	9,547	8,965	7,893
Profit attributable to non-controlling interests	1,483	1,449	1,272
Profit attributable to the parent	8,064	7,516	6,621
Intra-Group eliminations
Business segments
Gains (losses) on financial transactions		(39)	378
Total income		(39)	378
Administrative expenses and depreciation		(76)	(14)
Profit from operations		(115)	364
Net loan loss provisions		(98)
Other non-financial gains/(losses)	(576)	(1,249)	(885)
Operating profit / (loss) before tax	(576)	(1,462)	(521)
Income tax	344	704	114
CONSOLIDATED PROFIT FOR THE YEAR	(232)	(758)	(407)
Profit attributable to non-controlling interests	22	139	10
Profit attributable to the parent	€ (254)	€ (897)	€ (417)

Geographical and business seg_5

Geographical and business segment reporting - Reconciliation (Details) - EUR (€) € in Millions	Nov. 21, 2017	Mar. 07, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business segments
Net interest income			€ 34,341	€ 34,296	€ 31,089
Net fee and commission income (expense)			11,485	11,597	10,180
Gains (losses) on financial transactions			1,797	1,665	2,101
Other operating income (segments)			801	797	862
Total income			48,424	48,355	44,232
Administrative expenses and depreciation			(22,779)	(22,993)	(21,101)
Net loan loss provisions			(8,873)	(9,209)	(9,518)
Profit from operations			25,645	25,362	23,131
Other non-financial gains/(losses)			(2,571)	(4,062)	(2,845)
Operating profit / (loss) before tax			14,201	12,091	10,768
Income tax			(4,886)	(3,884)	(3,282)
Profit from continuing operations			9,315	8,207	7,486
CONSOLIDATED PROFIT FOR THE YEAR			9,315	8,207	7,486
Profit attributable to non-controlling interests			1,505	1,588	1,282
Profit attributable to the parent			7,810	6,619	6,204
Release presented in net loan loss provision instead of other gains (losses) and provisions for segment presentation			113	50	108
Proceeds from sale of equity method investment			2,327	883	459
Impairment on equity investment and intangible assets				(130)
Impairment losses				(899)	(50)
Impacts of USA tax reform and other impairments, net of tax				(76)
Gains (losses) on available-for-sale financial assets				472	861
Visa Europe
Business segments
Net gain on disposal of investment					380
Net gain on disposal, net of tax					227
Santander UK plc
Business segments
Additional provisions, other provisions, net of tax					137
Santander Consumer USA Holdings Inc.
Business segments
Impairment losses			(799)	(899)
Goodwill impairment, net of tax				(603)
SPAIN
Business segments
Restructuring costs					(662)
Restructuring costs, net of tax					(475)
GERMANY
Business segments
Restructuring costs				(125)
Restructuring costs, net of tax				(85)
Retail Banking Segment [Member]
Business segments
Net interest income			32,523	32,339	28,914
Net fee and commission income (expense)			8,945	9,306	8,206
Gains (losses) on financial transactions			720	681	668
Other operating income (segments)			645	580	536
Total income			42,833	42,906	38,324
Administrative expenses and depreciation			(19,256)	(19,677)	(18,036)
Net loan loss provisions			(8,461)	(8,278)	(8,673)
Profit from operations			23,577	23,229	20,288
Other non-financial gains/(losses)			(1,707)	(2,395)	(1,682)
Operating profit / (loss) before tax			13,409	12,556	9,933
Income tax			(4,329)	(3,843)	(2,734)
Profit from continuing operations			9,080	8,713	7,199
CONSOLIDATED PROFIT FOR THE YEAR			9,080	8,713	7,199
Profit attributable to non-controlling interests			1,287	1,258	1,089
Profit attributable to the parent			7,793	7,455	6,110
Corporate And Investment Banking Segment [Member]
Business segments
Net interest income			2,378	2,442	2,528
Net fee and commission income (expense)			1,512	1,627	1,407
Gains (losses) on financial transactions			1,004	1,212	1,256
Other operating income (segments)			193	222	289
Total income			5,087	5,503	5,480
Administrative expenses and depreciation			(2,105)	(2,028)	(1,917)
Net loan loss provisions			(217)	(690)	(658)
Profit from operations			2,982	3,475	3,563
Other non-financial gains/(losses)			(108)	(72)	(76)
Operating profit / (loss) before tax			2,657	2,713	2,829
Income tax			(792)	(750)	(787)
Profit from continuing operations			1,865	1,963	2,042
CONSOLIDATED PROFIT FOR THE YEAR			1,865	1,963	2,042
Profit attributable to non-controlling interests			160	183	174
Profit attributable to the parent			1,705	1,780	1,868
Wealth Management Segment [Member]
Business segments
Net interest income			420	404	429
Net fee and commission income (expense)			1,097	700	597
Gains (losses) on financial transactions			62	38	32
Other operating income (segments)			(37)	70	18
Total income			1,542	1,212	1,076
Administrative expenses and depreciation			(729)	(528)	(473)
Net loan loss provisions			(9)	(9)	(22)
Profit from operations			813	684	603
Other non-financial gains/(losses)			(7)	(8)	(5)
Operating profit / (loss) before tax			797	667	576
Income tax			(234)	(165)	(153)
Profit from continuing operations			563	502	423
CONSOLIDATED PROFIT FOR THE YEAR			563	502	423
Profit attributable to non-controlling interests			35	24	14
Profit attributable to the parent			528	478	409
Real estate operations in Spain
Business segments
Net interest income			(33)	(38)	(43)
Net fee and commission income (expense)				2	1
Gains (losses) on financial transactions					9
Other operating income (segments)			23	29	72
Total income			(10)	(7)	39
Administrative expenses and depreciation			(194)	(208)	(211)
Net loan loss provisions			(70)	(88)	(167)
Profit from operations			(204)	(215)	(172)
Other non-financial gains/(losses)			(73)	(157)	(122)
Operating profit / (loss) before tax			(347)	(460)	(461)
Income tax			104	139	137
Profit from continuing operations			(243)	(321)	(324)
CONSOLIDATED PROFIT FOR THE YEAR			(243)	(321)	(324)
Profit attributable to non-controlling interests			(2)	(13)	3
Profit attributable to the parent			(241)	(308)	(327)
Corporate product center
Business segments
Net interest income			(947)	(851)	(739)
Net fee and commission income (expense)			(69)	(38)	(31)
Gains (losses) on financial transactions			11	(227)	(242)
Other operating income (segments)			(23)	(104)	(53)
Total income			(1,028)	(1,220)	(1,065)
Administrative expenses and depreciation			(495)	(476)	(450)
Net loan loss provisions			(116)	(46)	2
Profit from operations			(1,523)	(1,696)	(1,515)
Other non-financial gains/(losses)			(100)	(181)	(75)
Operating profit / (loss) before tax			(1,739)	(1,923)	(1,588)
Income tax			21	31	141
Profit from continuing operations			(1,718)	(1,892)	(1,447)
CONSOLIDATED PROFIT FOR THE YEAR			(1,718)	(1,892)	(1,447)
Profit attributable to non-controlling interests			3	(3)	(8)
Profit attributable to the parent			(1,721)	(1,889)	(1,439)
Operating segment
Business segments
Net interest income			34,341	34,296	31,089
Net fee and commission income (expense)			11,485	11,597	10,180
Gains (losses) on financial transactions			1,797	1,704	1,723
Other operating income (segments)			801	797	862
Total income			48,424	48,394	43,854
Administrative expenses and depreciation			(22,779)	(22,917)	(21,087)
Net loan loss provisions			(8,873)	(9,111)	(9,518)
Profit from operations			25,645	25,477	22,767
Other non-financial gains/(losses)			(1,995)	(2,813)	(1,960)
Operating profit / (loss) before tax			14,777	13,553	11,289
Income tax			(5,230)	(4,588)	(3,396)
Profit from continuing operations			9,547	8,965	7,893
CONSOLIDATED PROFIT FOR THE YEAR			9,547	8,965	7,893
Profit attributable to non-controlling interests			1,483	1,449	1,272
Profit attributable to the parent			8,064	7,516	6,621
Intra-Group eliminations
Business segments
Gains (losses) on financial transactions				(39)	378
Total income				(39)	378
Administrative expenses and depreciation				(76)	(14)
Net loan loss provisions				(98)
Profit from operations				(115)	364
Other non-financial gains/(losses)			(576)	(1,249)	(885)
Operating profit / (loss) before tax			(576)	(1,462)	(521)
Income tax			344	704	114
CONSOLIDATED PROFIT FOR THE YEAR			(232)	(758)	(407)
Profit attributable to non-controlling interests			22	139	10
Profit attributable to the parent			(254)	€ (897)	€ (417)
Allfunds Bank Sa [Member]
Business segments
Proportion of ownership interest in joint venture to be sold		100.00%		100.00%
Proceeds from sale of equity method investment	€ 501			€ 501
Proportion of share capital in disposal group sold	25.00%			25.00%
Net gain on disposal of investment	€ 297			€ 425
Net gain on disposal, net of tax				297
Banco Popular Espanol, S.A.
Business segments
Restructuring costs				(425)
Restructuring costs, net of tax			(300)	€ (300)
Banco Popular Espanol, S.A. | SPAIN
Business segments
Restructuring costs, net of tax			(280)
Banco Popular Espanol, S.A. | PORTUGAL
Business segments
Restructuring costs, net of tax			20
Banco Popular Espanol, S.A. | Corporate product center
Business segments
Restructuring costs, net of tax			(40)
Retail and Private Banking Business of Deutsche Bank Polska SA
Business segments
Goodwill impairment, net of tax			€ (45)

Related parties (Details)

Related parties (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related parties
Insurance contracts	€ 210	€ 239	€ 269
Related parties [member]
Related parties
Insurance contracts	210	239	269
Associates and Joint Ventures [Member}
Related parties
Assets, related party	7,202	6,048	5,884
Liabilities, related party	1,650	748	824
Income Statement, related party	993	1,020	609
Interest income, related party	73	57	67
Interest expense, related party	3	3	15
Gains/losses on financial assets and liabilities and others, related party	82	302	15
Commission income, related party	853	735	561
Commission expense, related party	12	71	19
Other, related party	4,707	3,881	4,146
Contingent liabilities and others	21	6	19
Contingent commitments	393	301	17
Derivative financial instruments	4,293	3,574	4,110
Associates and Joint Ventures [Member} | Deposits - Credit institutions
Related parties
Liabilities, related party	8	309	155
Associates and Joint Ventures [Member} | Deposits - Customers
Related parties
Liabilities, related party	1,596	414	669
Associates and Joint Ventures [Member} | Marketable debt securities
Related parties
Liabilities, related party	8	4
Associates and Joint Ventures [Member} | Other financial liabilities
Related parties
Liabilities, related party	38	21
Associates and Joint Ventures [Member} | Loans and advances - Credit institutions
Related parties
Assets, related party	704	472	223
Associates and Joint Ventures [Member} | Loans and advances - Customers
Related parties
Assets, related party	6,142	5,081	5,209
Associates and Joint Ventures [Member} | Debt instruments
Related parties
Assets, related party	295	473	452
Associates and Joint Ventures [Member} | Other financial assets
Related parties
Assets, related party	61	22
Members of the board of directors
Related parties
Liabilities, related party	19	19	27
Other, related party	9	7	1
Contingent liabilities and others	7	6
Contingent commitments	1	1	1
Derivative financial instruments	1
Members of the board of directors | Deposits - Customers
Related parties
Liabilities, related party	19	19	27
Executive vice presidents
Related parties
Assets, related party	30	21	22
Liabilities, related party	12	14	10
Other, related party	3	3	3
Contingent liabilities and others	1	1
Contingent commitments	2	2	3
Executive vice presidents | Deposits - Customers
Related parties
Liabilities, related party	12	14	10
Executive vice presidents | Loans and advances - Customers
Related parties
Assets, related party	30	21	22
Other related parties [member]
Related parties
Assets, related party	256	300	307
Liabilities, related party	363	63	124
Income Statement, related party	31	14	13
Interest income, related party	14	8	10
Interest expense, related party	1		1
Commission income, related party	18	6	4
Other, related party	782	597	846
Contingent liabilities and others	508	352	139
Contingent commitments	64	60	417
Derivative financial instruments	210	185	290
Other related parties [member] | Deposits - Customers
Related parties
Liabilities, related party	363	63	124
Other related parties [member] | Loans and advances - Customers
Related parties
Assets, related party	€ 256	279	286
Other related parties [member] | Debt instruments
Related parties
Assets, related party		€ 21	€ 21

Risk management - Risk Governan

Risk management - Risk Governance (Details)	12 Months Ended
	Dec. 31, 2018areacomponentitem
Risk management
Risk management and control model, number of lines of defense | component	3
Number of main areas for risk identification | area	3
Number of reports | item	3

Risk management - Credit Risk f

Risk management - Credit Risk from Customers (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Loans and advances to customers	€ 882,921	€ 848,915	€ 790,470
Credit risk increase percentage	4.00%
Nonperforming
Credit risk
Loans and advances to customers	€ 35,692
Non-performing rate (as a percent)	3.73%
Percentage decrease in non-performing loans (NPLs)	(5.10%)
Percentage decrease in non-performing loans ratio	0.35%
Percentage decrease in provision for credit losses	2.60%
Percentage of decrease in cost of credit	0.07%
Decrease in nonperforming coverage ratio percent	(2.60%)
Cost of credit	1.00%
Nonperforming | Accumulated impairment
Credit risk
Financial assets	€ (8,873)
Banco Santander S.A.
Credit risk
Credit risk with customers	€ 958,153	€ 920,968	€ 855,510
Non-performing rate (as a percent)	3.73%	4.08%	3.93%
Banco Santander S.A. | Nonperforming
Credit risk
Loans and advances to customers	€ 35,692	€ 37,596	€ 33,643
SPAIN | Gross carrying amount
Credit risk
Financial assets	215,764	227,446	161,372
Continental Europe
Credit risk
Credit risk with customers	€ 429,454	€ 424,248	€ 331,706
Non-performing rate (as a percent)	5.25%	5.82%	5.92%
Percentage of credit risk diversification	45.00%
Continental Europe | Nonperforming
Credit risk
Loans and advances to customers	€ 22,537	€ 24,674	€ 19,638
Continental Europe | Santander Consumer Finance, S.A.
Credit risk
Credit risk with customers	€ 97,922	€ 92,589	€ 88,061
Non-performing rate (as a percent)	2.29%	2.50%	2.68%
Continental Europe | Santander Consumer Finance, S.A. | Nonperforming
Credit risk
Loans and advances to customers	€ 2,244	€ 2,319	€ 2,357
Continental Europe | SPAIN
Credit risk
Credit risk with customers	€ 239,479	€ 251,433	€ 172,974
Non-performing rate (as a percent)	6.19%	6.32%	5.41%
Continental Europe | SPAIN | Nonperforming
Credit risk
Loans and advances to customers	€ 14,833	€ 15,880	€ 9,361
Non-performing rate (as a percent)	6.19%
Percentage decrease in non-performing loans ratio	0.13%
Continental Europe | PORTUGAL
Credit risk
Credit risk with customers	€ 38,340	€ 39,394	€ 30,540
Non-performing rate (as a percent)	5.94%	7.51%	8.81%
Continental Europe | PORTUGAL | Nonperforming
Credit risk
Loans and advances to customers	€ 2,279	€ 2,959	€ 2,691
Continental Europe | POLAND
Credit risk
Credit risk with customers	€ 30,783	€ 24,391	€ 21,902
Non-performing rate (as a percent)	4.28%	4.57%	5.42%
Continental Europe | POLAND | Nonperforming
Credit risk
Loans and advances to customers	€ 1,317	€ 1,114	€ 1,187
United Kingdom
Credit risk
Credit risk with customers	€ 262,196	€ 247,625	€ 255,049
Non-performing rate (as a percent)	1.05%	1.33%	1.41%
Percentage of credit risk diversification	27.00%
Credit risk increase percentage	6.00%
United Kingdom | Nonperforming
Credit risk
Loans and advances to customers	€ 2,755	€ 3,295	€ 3,585
Latin America
Credit risk
Credit risk with customers	€ 171,898	€ 167,516	€ 173,150
Non-performing rate (as a percent)	4.34%	4.46%	4.81%
Percentage of credit risk diversification	18.00%
Latin America | Nonperforming
Credit risk
Loans and advances to customers	€ 7,461	€ 7,464	€ 8,333
Latin America | BRAZIL
Credit risk
Credit risk with customers	€ 84,212	€ 83,076	€ 89,572
Non-performing rate (as a percent)	5.25%	5.29%	5.90%
Latin America | BRAZIL | Nonperforming
Credit risk
Loans and advances to customers	€ 4,418	€ 4,391	€ 5,286
Latin America | MEXICO
Credit risk
Credit risk with customers	€ 33,764	€ 28,939	€ 29,682
Non-performing rate (as a percent)	2.43%	2.69%	2.76%
Latin America | MEXICO | Nonperforming
Credit risk
Loans and advances to customers	€ 822	€ 779	€ 819
Latin America | CHILE
Credit risk
Credit risk with customers	€ 41,268	€ 40,406	€ 40,864
Non-performing rate (as a percent)	4.66%	4.96%	5.05%
Latin America | CHILE | Nonperforming
Credit risk
Loans and advances to customers	€ 1,925	€ 2,004	€ 2,064
Latin America | ARGENTINA
Credit risk
Credit risk with customers	€ 5,631	€ 8,085	€ 7,318
Non-performing rate (as a percent)	3.17%	2.50%	1.49%
Latin America | ARGENTINA | Nonperforming
Credit risk
Loans and advances to customers	€ 179	€ 202	€ 109
United States
Credit risk
Credit risk with customers	€ 92,152	€ 77,190	€ 91,709
Non-performing rate (as a percent)	2.92%	2.79%	2.28%
Percentage of credit risk diversification	10.00%
United States | Nonperforming
Credit risk
Loans and advances to customers	€ 2,688	€ 2,156	€ 2,088
United States | Santander Bank, National Association
Credit risk
Credit risk with customers	€ 51,049	€ 44,237	€ 54,040
Non-performing rate (as a percent)	0.88%	1.21%	1.33%
United States | Santander Bank, National Association | Nonperforming
Credit risk
Loans and advances to customers	€ 450	€ 536	€ 717
United States | Santander Consumer USA Holdings Inc.
Credit risk
Credit risk with customers	€ 26,424	€ 24,079	€ 28,590
Non-performing rate (as a percent)	7.73%	5.86%	3.84%
Coverage rate (as a percent)	155.00%
Cost of credit	10.01%
United States | Santander Consumer USA Holdings Inc. | Nonperforming
Credit risk
Loans and advances to customers	€ 2,043	€ 1,410	€ 1,097

Risk management - Exposure and

Risk management - Exposure and Impairment Losses (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Exposure and impairment losses
Percent of the total Group's provisions considering the most relevant units of the group	95.00%
Maximum exposure to credit risk	€ 993,412
Impairment losses	20,970
Financial instruments purchased credit impaired
Exposure and impairment losses
Maximum exposure to credit risk	757	€ 803
Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	908,002
Maximum exposure, financial instruments not included elsewhere	242,867
Impairment losses	3,823
Next 12 months | Financial instruments not credit-impaired [member] | Other units
Exposure and impairment losses
Maximum exposure to credit risk	151,906
Impairment losses	152
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	54,616
Impairment losses	4,644
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member] | Other units
Exposure and impairment losses
Maximum exposure to credit risk	700
Impairment losses	163
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	30,795
Impairment losses	12,504
Lifetime Expected Credit Losses | Financial instruments credit-impaired | Other units
Exposure and impairment losses
Maximum exposure to credit risk	1,743
Impairment losses	1,145
Investment grade
Exposure and impairment losses
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	7,176
Speculation grade
Exposure and impairment losses
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	47,439
Default
Exposure and impairment losses
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	€ 30,795

Risk management - Credit Risk_2

Risk management - Credit Risk from UK Customers (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Credit risk increase percentage	4.00%
Maximum exposure to credit risk	€ 993,412
Impairment loss on financial assets	20,970
Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	908,002
Impairment loss on financial assets	3,823
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	54,616
Impairment loss on financial assets	4,644
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Impairment loss on financial assets	12,504
Investment grade
Credit risk
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	7,176
Speculation grade
Credit risk
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	47,439
Default
Credit risk
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Gross carrying amount | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Financial assets	154,164
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Financial assets	117
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Financial assets	€ 870
Nonperforming
Credit risk
Non-performing rate (as a percent)	3.73%
Percentage decrease in non-performing loans (NPLs)	5.10%
Santander UK plc
Credit risk
Maximum exposure to credit risk	€ 276,793
Impairment loss on financial assets	894
Santander UK plc | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	260,584
Impairment loss on financial assets	224
Santander UK plc | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	13,415
Impairment loss on financial assets	335
Santander UK plc | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	2,795
Impairment loss on financial assets	335
Santander UK plc | Investment grade
Credit risk
Maximum exposure to credit risk	227,829
Santander UK plc | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	225,929
Santander UK plc | Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	1,900
Santander UK plc | Speculation grade
Credit risk
Maximum exposure to credit risk	46,169
Santander UK plc | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	34,655
Santander UK plc | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	11,514
Santander UK plc | Default
Credit risk
Maximum exposure to credit risk	2,795
Santander UK plc | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	2,795
United Kingdom
Credit risk
Risk exposure	€ 262,196
Credit risk increase percentage	6.00%
Percentage of growth rate in local currency		7.00%
Percent at risk	27.00%
Non-performing rate (as a percent)	1.05%	1.33%	1.41%
United Kingdom | Santander UK plc | Mortgage assets | Gross carrying amount
Credit risk
Financial assets	€ 176,581

Risk management - Expected loss

Risk management - Expected losses based on prospective information UK Customers (Details) - Santander UK plc	12 Months Ended
	Dec. 31, 2018item
Disclosure of credit risk exposure [line items]
Number of prospective macroeconomic scenarios	5
Evolution projection period (in years)	5 years
Minimum period of irregular positions to consider significant increase in risk	30 days
Pessimistic scenario 2
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	2.30%
Unemployment rate (as a percent)	8.60%
Housing price change (as a percent)	(9.50%)
GDP growth (as a percent)	0.30%
Percentage of weightings associated with the macroeconomic scenarios	10.00%
Pessimistic scenario 1
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	2.50%
Unemployment rate (as a percent)	6.90%
Housing price change (as a percent)	(2.00%)
GDP growth (as a percent)	0.70%
Percentage of weightings associated with the macroeconomic scenarios	30.00%
Base scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.50%
Unemployment rate (as a percent)	4.30%
Housing price change (as a percent)	2.00%
GDP growth (as a percent)	1.60%
Percentage of weightings associated with the macroeconomic scenarios	40.00%
Optimistic scenario 1
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.30%
Unemployment rate (as a percent)	3.80%
Housing price change (as a percent)	2.30%
GDP growth (as a percent)	2.10%
Percentage of weightings associated with the macroeconomic scenarios	15.00%
Optimistic scenario 2
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.00%
Unemployment rate (as a percent)	2.80%
Housing price change (as a percent)	3.40%
GDP growth (as a percent)	2.50%
Percentage of weightings associated with the macroeconomic scenarios	5.00%

Risk management - Spain Portfol

Risk management - Spain Portfolio Overview (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Maximum exposure to credit risk	€ 993,412
Impairment loss on financial assets	20,970
Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	908,002
Impairment loss on financial assets	3,823
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	54,616
Impairment loss on financial assets	4,644
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Impairment loss on financial assets	12,504
Investment grade
Credit risk
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	7,176
Speculation grade
Credit risk
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	47,439
Default
Credit risk
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	€ 30,795
Nonperforming
Credit risk
Non-performing rate (as a percent)	3.73%
Percentage decrease in non-performing loans ratio	0.35%
Percentage decrease in non-performing loans (NPLs)	5.10%
SPAIN
Credit risk
Maximum exposure to credit risk	€ 224,207
Impairment loss on financial assets	6,699
SPAIN | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	196,374
Impairment loss on financial assets	366
SPAIN | Next 12 months | Financial instruments not credit-impaired [member] | Remaining legal entities
Credit risk
Maximum exposure to credit risk	125,544
Impairment loss on financial assets	132
SPAIN | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	12,892
Impairment loss on financial assets	768
SPAIN | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member] | Remaining legal entities
Credit risk
Maximum exposure to credit risk	66
Impairment loss on financial assets	48
SPAIN | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	14,941
Impairment loss on financial assets	5,565
SPAIN | Lifetime Expected Credit Losses | Financial instruments credit-impaired | Remaining legal entities
Credit risk
Maximum exposure to credit risk	1,657
Impairment loss on financial assets	957
SPAIN | Investment grade
Credit risk
Maximum exposure to credit risk	171,555
SPAIN | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	171,266
SPAIN | Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	289
SPAIN | Speculation grade
Credit risk
Maximum exposure to credit risk	37,711
SPAIN | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	25,108
SPAIN | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	12,603
SPAIN | Default
Credit risk
Maximum exposure to credit risk	14,941
SPAIN | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	€ 14,941
Continental Europe
Credit risk
Non-performing rate (as a percent)	5.25%	5.82%	5.92%
Continental Europe | SPAIN
Credit risk
Maximum exposure to credit risk	€ 239,479
Percent at risk	25.00%
Non-performing rate (as a percent)	6.19%	6.32%	5.41%
Continental Europe | SPAIN | Nonperforming
Credit risk
Non-performing rate (as a percent)	6.19%
Percentage decrease in non-performing loans ratio	0.13%
Percentage increase in non-performing loans ratio due to fall in lending	13.00%
Percentage decrease in non-performing loans ratio due to better NPL figure	0.22%
Continental Europe | SPAIN | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Nonperforming
Credit risk
Percentage decrease in non-performing loans (NPLs)	45.00%

Risk management - Expected lo_2

Risk management - Expected losses based on prospective information Spain Customers (Details) - SPAIN	12 Months Ended
	Dec. 31, 2018item
Disclosure of credit risk exposure [line items]
Number of prospective macroeconomic scenarios	3
Evolution projection period (in years)	5 years
Minimum period of irregular positions to consider significant increase in risk	30 days
Pessimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	0.30%
Unemployment rate (as a percent)	15.30%
Housing price change (as a percent)	0.50%
GDP growth (as a percent)	1.10%
Percentage of weightings associated with the macroeconomic scenarios	30.00%
Base scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	0.70%
Unemployment rate (as a percent)	12.30%
Housing price change (as a percent)	2.20%
GDP growth (as a percent)	1.80%
Percentage of weightings associated with the macroeconomic scenarios	40.00%
Optimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.20%
Unemployment rate (as a percent)	10.80%
Housing price change (as a percent)	3.80%
GDP growth (as a percent)	2.60%
Percentage of weightings associated with the macroeconomic scenarios	30.00%

Risk management - Spain Home Pu

Risk management - Spain Home Purchase Loans (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
With property collateral | More than 60% and less than or equal to 80% | Minimum
Credit risk
Loan-to-value (LTV) ratio	60.00%
SPAIN | Gross carrying amount
Credit risk
Financial assets	€ 215,764	€ 227,446	€ 161,372
Home purchase loans | SPAIN
Credit risk
Debt-to-income ratio (as a percent)	28.00%
Percentage of portfolio with LTV less than 80%	83.00%
Home purchase loans | SPAIN | Gross carrying amount
Credit risk
Financial assets	€ 63,290
Home purchase loans | SPAIN | Less Than 80 % | Maximum
Credit risk
Loan-to-value (LTV) ratio	80.00%
Home purchase loans | SPAIN | Nonperforming | Gross carrying amount
Credit risk
Financial assets	€ 2,493
Home purchase loans | SPAIN | Without collateral | Gross carrying amount
Credit risk
Financial assets	545
Home purchase loans | SPAIN | Without collateral | Nonperforming | Gross carrying amount
Credit risk
Financial assets	€ 54
Home purchase loans | SPAIN | With property collateral
Credit risk
Percent at risk	25.00%
Percentage secured by mortgage	99.14%
Home purchase loans | SPAIN | With property collateral | Gross carrying amount
Credit risk
Financial assets	€ 62,745
Home purchase loans | SPAIN | With property collateral | Less than or equal to 40% | Gross carrying amount
Credit risk
Financial assets	€ 15,393
Home purchase loans | SPAIN | With property collateral | Less than or equal to 40% | Maximum
Credit risk
Loan-to-value (LTV) ratio	40.00%
Home purchase loans | SPAIN | With property collateral | More than 40% and less than or equal to 60% | Gross carrying amount
Credit risk
Financial assets	€ 18,448
Home purchase loans | SPAIN | With property collateral | More than 40% and less than or equal to 60% | Minimum
Credit risk
Loan-to-value (LTV) ratio	40.00%
Home purchase loans | SPAIN | With property collateral | More than 40% and less than or equal to 60% | Maximum
Credit risk
Loan-to-value (LTV) ratio	60.00%
Home purchase loans | SPAIN | With property collateral | More than 60% and less than or equal to 80% | Gross carrying amount
Credit risk
Financial assets	€ 18,484
Home purchase loans | SPAIN | With property collateral | More than 60% and less than or equal to 80% | Maximum
Credit risk
Loan-to-value (LTV) ratio	80.00%
Home purchase loans | SPAIN | With property collateral | More than 80% and less than or equal to 100% | Gross carrying amount
Credit risk
Financial assets	€ 6,408
Home purchase loans | SPAIN | With property collateral | More than 80% and less than or equal to 100% | Minimum
Credit risk
Loan-to-value (LTV) ratio	80.00%
Home purchase loans | SPAIN | With property collateral | More than 80% and less than or equal to 100% | Maximum
Credit risk
Loan-to-value (LTV) ratio	100.00%
Home purchase loans | SPAIN | With property collateral | More than 100% | Gross carrying amount
Credit risk
Financial assets	€ 4,012
Home purchase loans | SPAIN | With property collateral | More than 100% | Minimum
Credit risk
Loan-to-value (LTV) ratio	100.00%
Home purchase loans | SPAIN | With property collateral | Nonperforming | Gross carrying amount
Credit risk
Financial assets	€ 2,439
Home purchase loans | SPAIN | With property collateral | Nonperforming | Less than or equal to 40% | Gross carrying amount
Credit risk
Financial assets	239
Home purchase loans | SPAIN | With property collateral | Nonperforming | More than 40% and less than or equal to 60% | Gross carrying amount
Credit risk
Financial assets	366
Home purchase loans | SPAIN | With property collateral | Nonperforming | More than 60% and less than or equal to 80% | Gross carrying amount
Credit risk
Financial assets	584
Home purchase loans | SPAIN | With property collateral | Nonperforming | More than 80% and less than or equal to 100% | Gross carrying amount
Credit risk
Financial assets	479
Home purchase loans | SPAIN | With property collateral | Nonperforming | More than 100% | Gross carrying amount
Credit risk
Financial assets	€ 771
First residence mortgages | SPAIN | Maximum
Credit risk
Maximum loan to value ratio allowed under credit policies	80.00%
Second home mortgages | SPAIN | Maximum
Credit risk
Maximum loan to value ratio allowed under credit policies	79.77%

Risk management - Spain Compani

Risk management - Spain Companies Portfolio (Details) - SPAIN - SMEs, companies and institutions segment € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Credit risk
Risk exposure	€ 147,634
Percent at risk	60.00%
Percentage of portfolio assigned to an analyst	90.00%

Risk management - Spain Real Es

Risk management - Spain Real Estate Business (Details) - SPAIN - Real estate operations in Spain - Construction and property development - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in property loans
Financial assets at beginning of period	€ 6,472	€ 5,515	€ 7,388
Foreclosed assets	(100)	(27)	(28)
Banco Popular (Perimeter)		2,934
Reductions	(1,267)	(1,620)	(1,415)
Write-off of impaired assets against recorded allowance	(293)	(330)	(430)
Financial assets at end of period	€ 4,812	€ 6,472	€ 5,515

Risk management - Spain Real _2

Risk management - Spain Real Estate Business: gross, collateral, allowance (Details) - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Nonperforming
Distribution of portfolio
Non-performing rate (as a percent)	3.73%
Accumulated impairment | Nonperforming
Distribution of portfolio
Financial assets	€ (8,873)
SPAIN | Gross carrying amount
Distribution of portfolio
Financial assets	215,764	€ 227,446	€ 161,372
SPAIN | Gross carrying amount | Real estate operations in Spain
Distribution of portfolio
Financial assets	4,812
SPAIN | Accumulated impairment | Real estate operations in Spain
Distribution of portfolio
Financial assets	(1,244)
Construction and property development | SPAIN | Real estate operations in Spain
Distribution of portfolio
Financial assets	4,812	€ 6,472	€ 5,515	€ 7,388
Excess over collateral value	€ 834
Construction and property development | SPAIN | Nonperforming | Real estate operations in Spain
Distribution of portfolio
Non-performing rate (as a percent)	27.58%	29.96%
Coverage rate (as a percent)	35.27%
Excess over collateral value	€ 393
Construction and property development | SPAIN | Gross carrying amount | Real estate operations in Spain
Distribution of portfolio
Financial assets	4,812
Construction and property development | SPAIN | Gross carrying amount | Nonperforming | Real estate operations in Spain
Distribution of portfolio
Financial assets	1,327
Written-off assets	(3,675)
Construction and property development | SPAIN | Accumulated impairment | Real estate operations in Spain | Expected credit losses individually assessed [member]
Distribution of portfolio
Financial assets	532
Construction and property development | SPAIN | Accumulated impairment | Nonperforming | Real estate operations in Spain | Expected credit losses individually assessed [member]
Distribution of portfolio
Financial assets	€ 468

Risk management - Spain Real _3

Risk management - Spain Real Estate Business Segment Information (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Dec. 31, 2016
Memorandum items: Data from the public consolidated balance sheet
Total loans and advances to customers excluding the public sector (business in Spain)	€ 882,921		€ 848,915	€ 790,470
Total assets	1,459,271	€ 1,443,069	€ 1,444,305	€ 1,339,125
SPAIN | Accumulated impairment | Real estate operations in Spain
Memorandum items: Data from the public consolidated balance sheet
Financial assets	(1,244)
SPAIN | Customers excluding the public sector | Real estate operations in Spain
Memorandum items: Data from the public consolidated balance sheet
Total loans and advances to customers excluding the public sector (business in Spain)	€ 223,921

Risk management - Spain Real _4

Risk management - Spain Real Estate Business Concentration Information (Details) - SPAIN - Gross carrying amount - EUR (€) € in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Distribution of portfolio
Financial assets	€ 215,764	€ 227,446	€ 161,372
Real estate operations in Spain
Distribution of portfolio
Financial assets	4,812
Real estate operations in Spain | Without collateral
Distribution of portfolio
Financial assets	379
Real estate operations in Spain | With property collateral
Distribution of portfolio
Financial assets	4,433
Real estate operations in Spain | Buildings | With property collateral
Distribution of portfolio
Financial assets	2,691
Real estate operations in Spain | Buildings | Residential Property Collateral [Member]
Distribution of portfolio
Financial assets	1,328
Real estate operations in Spain | Buildings | Non-residential Property Collateral [Member]
Distribution of portfolio
Financial assets	1,363
Real estate operations in Spain | Construction in progress | With property collateral
Distribution of portfolio
Financial assets	1,071
Real estate operations in Spain | Construction in progress | Residential Property Collateral [Member]
Distribution of portfolio
Financial assets	609
Real estate operations in Spain | Construction in progress | Non-residential Property Collateral [Member]
Distribution of portfolio
Financial assets	462
Real estate operations in Spain | Land [member] | With property collateral
Distribution of portfolio
Financial assets	671
Real estate operations in Spain | Land [member] | Developed Land Collateral [Member]
Distribution of portfolio
Financial assets	480
Real estate operations in Spain | Land [member] | Undeveloped Land Collateral [Member]
Distribution of portfolio
Financial assets	€ 191

Risk management - Spain Foreclo

Risk management - Spain Foreclosed properties (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 02, 2018	Dec. 31, 2015
Assets foreclosed
Investments accounted for using equity method	€ 7,588	€ 6,184	€ 4,836	€ 6,150	€ 3,251
Loans and advances to customers	882,921	848,915	790,470
Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	5,226
Changes in property loans
Gross additions	0.8	1.4	1.3
Disposals	(1.8)	(1.9)	€ (1.3)
Difference	(1)	€ (0.5)
Foreclosed Properties [Member] | SPAIN | Blackstone Fund
Assets foreclosed
Investments accounted for using equity method	1,701
Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	10,333
Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(5,107)
Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(3,142)
Construction and property development | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	3,776
Construction and property development | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	7,909
Construction and property development | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(4,133)
Construction and property development | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(2,733)
Completed buildings | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	1,992
Completed buildings | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	796
Completed buildings | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	1,196
Completed buildings | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	3,194
Completed buildings | Gross carrying amount | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	1,247
Completed buildings | Gross carrying amount | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	1,947
Completed buildings | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(1,202)
Completed buildings | Accumulated impairment | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	(451)
Completed buildings | Accumulated impairment | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	(751)
Completed buildings | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(706)
Completed buildings | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	(211)
Completed buildings | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	(495)
Buildings and other constructions under construction | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	168
Buildings and other constructions under construction | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	159
Buildings and other constructions under construction | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	9
Buildings and other constructions under construction | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	299
Buildings and other constructions under construction | Gross carrying amount | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	287
Buildings and other constructions under construction | Gross carrying amount | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	12
Buildings and other constructions under construction | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(131)
Buildings and other constructions under construction | Accumulated impairment | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	(128)
Buildings and other constructions under construction | Accumulated impairment | Foreclosed Properties [Member] | Other purposes | SPAIN
Assets foreclosed
Loans and advances to customers	(3)
Buildings and other constructions under construction | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(81)
Buildings and other constructions under construction | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | Residential loans | SPAIN
Assets foreclosed
Loans and advances to customers	(81)
Land | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	1,616
Land | Foreclosed Properties [Member] | Developed consolidated land | SPAIN
Assets foreclosed
Loans and advances to customers	619
Land | Foreclosed Properties [Member] | Other land | SPAIN
Assets foreclosed
Loans and advances to customers	997
Land | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	4,416
Land | Gross carrying amount | Foreclosed Properties [Member] | Developed consolidated land | SPAIN
Assets foreclosed
Loans and advances to customers	1,616
Land | Gross carrying amount | Foreclosed Properties [Member] | Other land | SPAIN
Assets foreclosed
Loans and advances to customers	2,800
Land | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(2,800)
Land | Accumulated impairment | Foreclosed Properties [Member] | Developed consolidated land | SPAIN
Assets foreclosed
Loans and advances to customers	(997)
Land | Accumulated impairment | Foreclosed Properties [Member] | Other land | SPAIN
Assets foreclosed
Loans and advances to customers	(1,803)
Land | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(1,946)
Land | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | Developed consolidated land | SPAIN
Assets foreclosed
Loans and advances to customers	(597)
Land | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | Other land | SPAIN
Assets foreclosed
Loans and advances to customers	(1,349)
Home purchase loans | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	1,165
Home purchase loans | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	2,016
Home purchase loans | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(851)
Home purchase loans | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(357)
Other loans | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	285
Other loans | Gross carrying amount | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	408
Other loans | Accumulated impairment | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	(123)
Other loans | Impairment losses since time of foreclosure | Foreclosed Properties [Member] | SPAIN
Assets foreclosed
Loans and advances to customers	€ (52)

Risk management - United States

Risk management - United States - Santander Bank, N.A. (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Maximum exposure to credit risk	€ 993,412
Impairment losses	20,970
Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	908,002
Impairment losses	3,823
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	54,616
Impairment losses	4,644
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Impairment losses	12,504
Investment grade
Credit risk
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	7,176
Speculation grade
Credit risk
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	47,439
Default
Credit risk
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Gross carrying amount | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Financial assets	154,164
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Financial assets	117
Gross carrying amount | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Financial assets	870
United States
Credit risk
Risk exposure	€ 92,152
Credit exposure, percentage of total loans	10.00%
Non-performing rate (as a percent)	2.92%	2.79%	2.28%
United States | Santander Bank, National Association
Credit risk
Non-performing rate (as a percent)	0.88%	1.21%	1.33%
Maximum exposure to credit risk	€ 69,772
Impairment losses	542
United States | Santander Bank, National Association | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	65,540
Impairment losses	233
United States | Santander Bank, National Association | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	3,784
Impairment losses	204
United States | Santander Bank, National Association | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	448
Impairment losses	105
United States | Santander Bank, National Association | Investment grade
Credit risk
Maximum exposure to credit risk	5,149
United States | Santander Bank, National Association | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	5,149
United States | Santander Bank, National Association | Speculation grade
Credit risk
Maximum exposure to credit risk	64,175
United States | Santander Bank, National Association | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	60,391
United States | Santander Bank, National Association | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	3,784
United States | Santander Bank, National Association | Default
Credit risk
Maximum exposure to credit risk	448
United States | Santander Bank, National Association | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	€ 448
United States | Santander Bank, National Association | With property collateral
Credit risk
Percentage of loans secured	0.88%
Decrease in lending (as a percent)	0.24%
Percentage decrease in non-performing loans (NPLs)	0.33%
United States | Santander Bank, National Association | Retail and commercial banking
Credit risk
Credit exposure, percentage of total loans	83.00%
United States | Santander Bank, National Association | Individuals
Credit risk
Credit exposure, percentage of total loans	35.00%
United States | Santander Bank, National Association | Companies
Credit risk
Credit exposure, percentage of total loans	65.00%
United States | Santander Bank, National Association | Wholesale banking business
Credit risk
Credit exposure, percentage of total loans	17.00%
United States | Santander Consumer USA Holdings Inc.
Credit risk
Credit exposure, percentage of total loans	3.00%
Non-performing rate (as a percent)	7.73%	5.86%	3.84%
Maximum exposure to credit risk	€ 29,355
Impairment losses	3,211
United States | Santander Consumer USA Holdings Inc. | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	20,537
Impairment losses	824
United States | Santander Consumer USA Holdings Inc. | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	6,600
Impairment losses	1,720
United States | Santander Consumer USA Holdings Inc. | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	2,218
Impairment losses	667
United States | Santander Consumer USA Holdings Inc. | Investment grade
Credit risk
Maximum exposure to credit risk	224
United States | Santander Consumer USA Holdings Inc. | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	224
United States | Santander Consumer USA Holdings Inc. | Speculation grade
Credit risk
Maximum exposure to credit risk	26,913
United States | Santander Consumer USA Holdings Inc. | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	20,313
United States | Santander Consumer USA Holdings Inc. | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	6,600
United States | Santander Consumer USA Holdings Inc. | Default
Credit risk
Maximum exposure to credit risk	2,218
United States | Santander Consumer USA Holdings Inc. | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	2,218
United States | Santander Holding USA, Inc.
Credit risk
Risk exposure	€ 9.5

Risk management - United Stat_2

Risk management - United States - Santander Bank, N.A - Expected losses based on prospective information (Details) - United States - Santander Bank, National Association	12 Months Ended
	Dec. 31, 2018item
Disclosure of credit risk exposure [line items]
Number of prospective macroeconomic scenarios	3
Evolution projection period (in years)	5 years
Minimum period of irregular positions to consider significant increase in risk	30 days
Pessimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.30%
Unemployment rate (as a percent)	6.90%
Housing price change (as a percent)	2.20%
GDP growth (as a percent)	1.50%
Percentage of weightings associated with the macroeconomic scenarios	20.00%
Base scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	2.80%
Unemployment rate (as a percent)	4.20%
Housing price change (as a percent)	3.90%
GDP growth (as a percent)	2.10%
Percentage of weightings associated with the macroeconomic scenarios	60.00%
Optimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	3.60%
Unemployment rate (as a percent)	3.80%
Housing price change (as a percent)	3.90%
GDP growth (as a percent)	2.80%
Percentage of weightings associated with the macroeconomic scenarios	20.00%

Risk management - United Stat_3

Risk management - United States - SC USA (Details) - United States	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Credit exposure, percentage of total loans	10.00%
Non-performing rate (as a percent)	2.92%	2.79%	2.28%
Santander Consumer USA Holdings Inc.
Credit risk
Credit exposure, percentage of total loans	3.00%
Non-performing rate (as a percent)	7.73%	5.86%	3.84%
Cost of credit	10.01%
Increase in cost of credit	0.17%
Nonperforming Coverage Ratio	155.00%
Auto financing through loan and leasing | Santander Consumer USA Holdings Inc.
Credit risk
Credit exposure, percentage of total loans	97.00%

Risk management - United Stat_4

Risk management - United States - SC USA - Exposure and Impairment losses (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)
Exposure and impairment losses
Maximum exposure to credit risk	€ 993,412
Impairment losses	20,970
Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	908,002
Impairment losses	3,823
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	54,616
Impairment losses	4,644
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	30,795
Impairment losses	12,504
Investment grade
Exposure and impairment losses
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	7,176
Speculation grade
Exposure and impairment losses
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	47,439
Default
Exposure and impairment losses
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	30,795
United States | Santander Consumer USA Holdings Inc.
Exposure and impairment losses
Maximum exposure to credit risk	29,355
Impairment losses	3,211
United States | Santander Consumer USA Holdings Inc. | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	20,537
Impairment losses	824
United States | Santander Consumer USA Holdings Inc. | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	6,600
Impairment losses	1,720
United States | Santander Consumer USA Holdings Inc. | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	2,218
Impairment losses	667
United States | Santander Consumer USA Holdings Inc. | Investment grade
Exposure and impairment losses
Maximum exposure to credit risk	224
United States | Santander Consumer USA Holdings Inc. | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	224
United States | Santander Consumer USA Holdings Inc. | Speculation grade
Exposure and impairment losses
Maximum exposure to credit risk	26,913
United States | Santander Consumer USA Holdings Inc. | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	20,313
United States | Santander Consumer USA Holdings Inc. | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Exposure and impairment losses
Maximum exposure to credit risk	6,600
United States | Santander Consumer USA Holdings Inc. | Default
Exposure and impairment losses
Maximum exposure to credit risk	2,218
United States | Santander Consumer USA Holdings Inc. | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Exposure and impairment losses
Maximum exposure to credit risk	€ 2,218

Risk management - United Stat_5

Risk management - United States - SC USA - Expected losses based on prospective information (Details) - United States - Santander Consumer USA Holdings Inc.	12 Months Ended
	Dec. 31, 2018item
Disclosure of credit risk exposure [line items]
Number of prospective macroeconomic scenarios	3
Evolution projection period (in years)	5 years
Minimum period of irregular positions to consider significant increase in risk	30 days
Pessimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	1.30%
Unemployment rate (as a percent)	6.90%
Housing price change (as a percent)	2.20%
GDP growth (as a percent)	1.50%
Percentage of weightings associated with the macroeconomic scenarios	20.00%
Base scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	2.80%
Unemployment rate (as a percent)	4.20%
Housing price change (as a percent)	3.90%
GDP growth (as a percent)	2.10%
Percentage of weightings associated with the macroeconomic scenarios	60.00%
Optimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	3.60%
Unemployment rate (as a percent)	3.80%
Housing price change (as a percent)	3.90%
GDP growth (as a percent)	2.80%
Percentage of weightings associated with the macroeconomic scenarios	20.00%

Risk management - United Stat_6

Risk management - United States - Other (Details) - United States	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Credit exposure, percentage of total loans	10.00%
Non-performing rate (as a percent)	2.92%	2.79%	2.28%

Risk management - Brazil (Detai

Risk management - Brazil (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Credit risk
Maximum exposure to credit risk	€ 993,412
Impairment losses	20,970
Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	908,002
Impairment losses	3,823
Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	54,616
Impairment losses	4,644
Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	30,795
Impairment losses	12,504
Investment grade
Credit risk
Maximum exposure to credit risk	692,683
Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	685,507
Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	7,176
Speculation grade
Credit risk
Maximum exposure to credit risk	269,935
Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	222,495
Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	47,439
Default
Credit risk
Maximum exposure to credit risk	30,795
Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	€ 30,795
BRAZIL | Banco Santander (Brasil) S.A | Retail customers | Minimum
Credit risk
Credit exposure, percentage of total loans	60.00%
Latin America
Credit risk
Non-performing rate (as a percent)	4.34%	4.46%	4.81%
Latin America | BRAZIL
Credit risk
Risk exposure	€ 82,212
Decrease in portfolio (as a percent)	1.40%
Non-performing rate (as a percent)	5.25%	5.29%	5.90%
Latin America | BRAZIL | Banco Santander (Brasil) S.A
Credit risk
Credit exposure, percentage of total loans	13.00%
Percentage of growth rate in local currency	9.00%
Maximum exposure to credit risk	€ 118,063
Impairment losses	4,654
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	108,034
Impairment losses	997
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	5,806
Impairment losses	768
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	4,223
Impairment losses	2,889
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Investment grade
Credit risk
Maximum exposure to credit risk	51,622
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Investment grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	51,150
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Investment grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	472
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Speculation grade
Credit risk
Maximum exposure to credit risk	62,218
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Speculation grade | Next 12 months | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	56,884
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Speculation grade | Lifetime Expected Credit Losses | Financial instruments not credit-impaired [member]
Credit risk
Maximum exposure to credit risk	5,334
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Default
Credit risk
Maximum exposure to credit risk	4,223
Latin America | BRAZIL | Banco Santander (Brasil) S.A | Default | Lifetime Expected Credit Losses | Financial instruments credit-impaired
Credit risk
Maximum exposure to credit risk	€ 4,223

Risk management - Brazil - Expe

Risk management - Brazil - Expected losses based on prospective information (Details) - BRAZIL - Banco Santander (Brasil) S.A	12 Months Ended
	Dec. 31, 2018item
Disclosure of credit risk exposure [line items]
Minimum period of irregular positions to consider significant increase in risk	30 days
Real State, Consigned and Financial portfolio
Disclosure of credit risk exposure [line items]
Minimum period of irregular positions to consider significant increase in risk	60 days
Latin America
Disclosure of credit risk exposure [line items]
Number of prospective macroeconomic scenarios	3
Evolution projection period (in years)	5 years
Latin America | Pessimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	11.00%
Unemployment rate (as a percent)	16.30%
Housing price change (as a percent)	(1.40%)
GDP growth (as a percent)	(1.20%)
Percentage of weightings associated with the macroeconomic scenarios	10.00%
Latin America | Base scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	7.70%
Unemployment rate (as a percent)	9.90%
Housing price change (as a percent)	4.30%
GDP growth (as a percent)	2.40%
Percentage of weightings associated with the macroeconomic scenarios	80.00%
Latin America | Optimistic scenario
Disclosure of credit risk exposure [line items]
Interest rate (as a percent)	6.00%
Unemployment rate (as a percent)	8.60%
Housing price change (as a percent)	5.90%
GDP growth (as a percent)	3.50%
Percentage of weightings associated with the macroeconomic scenarios	10.00%

Risk management - Santander Cor

Risk management - Santander Corporate & Investment Banking (Details) - Corporate And Investment Banking Segment [Member]	12 Months Ended
	Dec. 31, 2018
Pessimistic scenario
Disclosure of credit risk exposure [line items]
GDP growth (as a percent)	2.70%
Percentage of weightings associated with the macroeconomic scenarios	20.00%
Base scenario
Disclosure of credit risk exposure [line items]
GDP growth (as a percent)	3.60%
Percentage of weightings associated with the macroeconomic scenarios	60.00%
Optimistic scenario
Disclosure of credit risk exposure [line items]
GDP growth (as a percent)	4.20%
Percentage of weightings associated with the macroeconomic scenarios	20.00%

Risk management - Credit risk_3

Risk management - Credit risk from other standpoints (Details)	12 Months Ended
	Dec. 31, 2018component
Risk management
Number of methods used to measure exposure to counterparty credit risk	2

Risk management - Concentration

Risk management - Concentration risk (Details) - "Large Exposures" Customers - Credit risk € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)customer
Concentration of risk
Large exposure threshold percentage	10.00%
Maximum percentage of eligible capital allowed under regulation	25.00%
Number of largest groups | customer	20
Credit exposure, percentage of total loans	4.47%
Concentration of credit risk	€ 1,400,259
SPAIN
Concentration of risk
Concentration of credit risk	357,378
Other European Countries
Concentration of risk
Concentration of credit risk	581,045
America
Concentration of risk
Concentration of credit risk	411,938
Rest of World
Concentration of risk
Concentration of credit risk	49,898
Central banks and Credit institutions
Concentration of risk
Concentration of credit risk	244,523
Central banks and Credit institutions | SPAIN
Concentration of risk
Concentration of credit risk	60,562
Central banks and Credit institutions | Other European Countries
Concentration of risk
Concentration of credit risk	94,532
Central banks and Credit institutions | America
Concentration of risk
Concentration of credit risk	75,460
Central banks and Credit institutions | Rest of World
Concentration of risk
Concentration of credit risk	13,969
Public sector
Concentration of risk
Concentration of credit risk	177,207
Public sector | SPAIN
Concentration of risk
Concentration of credit risk	64,528
Public sector | Other European Countries
Concentration of risk
Concentration of credit risk	38,112
Public sector | America
Concentration of risk
Concentration of credit risk	67,943
Public sector | Rest of World
Concentration of risk
Concentration of credit risk	6,624
Central government
Concentration of risk
Concentration of credit risk	157,656
Central government | SPAIN
Concentration of risk
Concentration of credit risk	53,060
Central government | Other European Countries
Concentration of risk
Concentration of credit risk	34,497
Central government | America
Concentration of risk
Concentration of credit risk	63,490
Central government | Rest of World
Concentration of risk
Concentration of credit risk	6,609
Other central government
Concentration of risk
Concentration of credit risk	19,551
Other central government | SPAIN
Concentration of risk
Concentration of credit risk	11,468
Other central government | Other European Countries
Concentration of risk
Concentration of credit risk	3,615
Other central government | America
Concentration of risk
Concentration of credit risk	4,453
Other central government | Rest of World
Concentration of risk
Concentration of credit risk	15
Other financial institutions (Financial business activity)
Concentration of risk
Concentration of credit risk	102,985
Other financial institutions (Financial business activity) | SPAIN
Concentration of risk
Concentration of credit risk	16,378
Other financial institutions (Financial business activity) | Other European Countries
Concentration of risk
Concentration of credit risk	54,473
Other financial institutions (Financial business activity) | America
Concentration of risk
Concentration of credit risk	25,751
Other financial institutions (Financial business activity) | Rest of World
Concentration of risk
Concentration of credit risk	6,383
Non-financial corporations and individual entrepreneurs (Non-financial business activity)
Concentration of risk
Concentration of credit risk	383,708
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | SPAIN
Concentration of risk
Concentration of credit risk	126,503
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Other European Countries
Concentration of risk
Concentration of credit risk	117,261
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | America
Concentration of risk
Concentration of credit risk	126,098
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Rest of World
Concentration of risk
Concentration of credit risk	13,846
Construction and property development
Concentration of risk
Concentration of credit risk	27,699
Construction and property development | SPAIN
Concentration of risk
Concentration of credit risk	5,578
Construction and property development | Other European Countries
Concentration of risk
Concentration of credit risk	4,674
Construction and property development | America
Concentration of risk
Concentration of credit risk	17,311
Construction and property development | Rest of World
Concentration of risk
Concentration of credit risk	136
Civil Engineering Construction Loans Member
Concentration of risk
Concentration of credit risk	5,606
Civil Engineering Construction Loans Member | SPAIN
Concentration of risk
Concentration of credit risk	3,352
Civil Engineering Construction Loans Member | Other European Countries
Concentration of risk
Concentration of credit risk	1,642
Civil Engineering Construction Loans Member | America
Concentration of risk
Concentration of credit risk	595
Civil Engineering Construction Loans Member | Rest of World
Concentration of risk
Concentration of credit risk	17
Large companies
Concentration of risk
Concentration of credit risk	220,192
Large companies | SPAIN
Concentration of risk
Concentration of credit risk	56,547
Large companies | Other European Countries
Concentration of risk
Concentration of credit risk	72,406
Large companies | America
Concentration of risk
Concentration of credit risk	78,850
Large companies | Rest of World
Concentration of risk
Concentration of credit risk	12,389
SMEs and individual entrepreneurs
Concentration of risk
Concentration of credit risk	130,211
SMEs and individual entrepreneurs | SPAIN
Concentration of risk
Concentration of credit risk	61,026
SMEs and individual entrepreneurs | Other European Countries
Concentration of risk
Concentration of credit risk	38,539
SMEs and individual entrepreneurs | America
Concentration of risk
Concentration of credit risk	29,342
SMEs and individual entrepreneurs | Rest of World
Concentration of risk
Concentration of credit risk	1,304
Households - other
Concentration of risk
Concentration of credit risk	491,836
Households - other | SPAIN
Concentration of risk
Concentration of credit risk	89,407
Households - other | Other European Countries
Concentration of risk
Concentration of credit risk	276,667
Households - other | America
Concentration of risk
Concentration of credit risk	116,686
Households - other | Rest of World
Concentration of risk
Concentration of credit risk	9,076
Residential loans
Concentration of risk
Concentration of credit risk	314,048
Residential loans | SPAIN
Concentration of risk
Concentration of credit risk	62,232
Residential loans | Other European Countries
Concentration of risk
Concentration of credit risk	210,218
Residential loans | America
Concentration of risk
Concentration of credit risk	40,696
Residential loans | Rest of World
Concentration of risk
Concentration of credit risk	902
Consumer loans
Concentration of risk
Concentration of credit risk	156,806
Consumer loans | SPAIN
Concentration of risk
Concentration of credit risk	18,065
Consumer loans | Other European Countries
Concentration of risk
Concentration of credit risk	64,258
Consumer loans | America
Concentration of risk
Concentration of credit risk	68,872
Consumer loans | Rest of World
Concentration of risk
Concentration of credit risk	5,611
Other purposes
Concentration of risk
Concentration of credit risk	20,982
Other purposes | SPAIN
Concentration of risk
Concentration of credit risk	9,110
Other purposes | Other European Countries
Concentration of risk
Concentration of credit risk	2,191
Other purposes | America
Concentration of risk
Concentration of credit risk	7,118
Other purposes | Rest of World
Concentration of risk
Concentration of credit risk	€ 2,563

Risk management - Sovereign ris

Risk management - Sovereign risk and exposure to other public sector entities (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Local sovereign other than official currency risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	€ 8,901
Percentage of total sovereign risk	3.50%
Non-local sovereign cross border risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	€ 3,906
Percentage of total sovereign risk	1.50%
Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	€ 138,901
Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	10,275
Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	81,883
Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	45,845
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	898
SPAIN | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	49,640	€ 62,637	€ 45,893
SPAIN | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,143
SPAIN | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	27,078
SPAIN | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	21,419
PORTUGAL | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	8,753	8,817	7,072
PORTUGAL | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk attributable to short position	(43)
PORTUGAL | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	4,794
PORTUGAL | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	4,002
ITALY | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	261	€ 6,108	€ 1,952
ITALY | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk attributable to short position	(204)
ITALY | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	465
Rest of eurozone | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	2,778
Rest of eurozone | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	503
Rest of eurozone | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	953
Rest of eurozone | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,322
UK | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	10,869
UK | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,013
UK | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,190
UK | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	8,666
POLAND | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	11,229
POLAND | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	2,015
POLAND | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	9,203
POLAND | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	11
Rest of Europe | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	329
Rest of Europe | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	84
Rest of Europe | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	245
UNITED STATES | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	8,682
UNITED STATES | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	426
UNITED STATES | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	6,138
UNITED STATES | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	2,113
UNITED STATES | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	5
BRAZIL | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	27,054
BRAZIL | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,839
BRAZIL | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	20,540
BRAZIL | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	3,782
BRAZIL | Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	893
MEXICO | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	10,415
MEXICO | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	3,320
MEXICO | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	4,279
MEXICO | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	2,816
CHILE | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,776
CHILE | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	160
CHILE | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	1,596
CHILE | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	20
Other American Countries | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	893
Other American Countries | Financial assets designated at fair value through profit or loss, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	103
Other American Countries | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	340
Other American Countries | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	450
Rest of World | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	6,222
Rest of World | Financial assets at fair value through other comprehensive income, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	5,688
Rest of World | Financial assets at amortised cost, category | Sovereign Risk
Sovereign risk and exposure to other public sector entities
Risk exposure associated with instruments sharing characteristic	€ 534

Risk management - Credit risk c

Risk management - Credit risk cycle (Details) - Credit risk	12 Months Ended
	Dec. 31, 2018item
Planning (Commercial Strategic Plan)
Scenario analysis, horizon	3 years
Number of phases in recovery management	4

Risk management - Forborne Loan

Risk management - Forborne Loans (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)loan	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Forborne Loan Portfolio
Forbearance portfolio, Amount	€ 41,234
Percentage of forbearance portfolio	26.00%
Average coverage (as a percent)	53.00%
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables		€ 903,013	€ 840,004
Credit risk | Forborne loan portfolio
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 30,527	€ 36,164	€ 37,365
Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (10,707)
Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	1,766,116
Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 10,946
Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	869,194
Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 30,288
Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	16,048
Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	5,356
Public sector | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (6)
Public sector | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	37
Public sector | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 76
Public sector | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	16
Public sector | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 18
Public sector | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	11
Public sector | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	4
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (10)
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	265
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 11
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	135
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 38
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	16
Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	15
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (6,339)
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	187,192
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 7,383
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	44,452
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 13,039
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	8,116
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,321
Construction and property development | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (620)
Construction and property development | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	426
Construction and property development | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 313
Construction and property development | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	1,889
Construction and property development | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,932
Construction and property development | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,600
Construction and property development | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	30
Other warehouses | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (4,352)
Other warehouses | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	1,578,622
Other warehouses | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 3,476
Other warehouses | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	824,591
Other warehouses | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 17,193
Other warehouses | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	7,905
Other warehouses | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 4,016
Nonperforming
Forborne Loan Portfolio
Percentage of forbearance portfolio	49.00%
Nonperforming | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (8,634)
Nonperforming | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	996,408
Nonperforming | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 6,347
Nonperforming | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	207,675
Nonperforming | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 14,010
Nonperforming | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	8,576
Nonperforming | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,512
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (2)
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	13
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 7
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	9
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 4
Nonperforming | Public sector | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	4
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (9)
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	110
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 3
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	75
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 16
Nonperforming | Other financial institutions (Financial business activity) | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	9
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (5,851)
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	121,445
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 4,669
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	26,122
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 8,156
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	5,058
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	689
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (594)
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	328
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 245
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	1,369
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,329
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,038
Nonperforming | Construction and property development | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	28
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (2,772)
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	874,840
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,668
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | loan	181,469
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 5,834
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	3,505
Nonperforming | Other warehouses | Credit risk | Forborne loan portfolio | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 823

Risk management - Forborne Lo_2

Risk management - Forborne Loans Roll Forward (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Changes in the portfolio
Beginning balance	€ 903,013	€ 840,004
Balance at end of year		903,013
Credit risk | Forborne loan portfolio
Forborne Loan Portfolio
Percentage of loans covered by specific allowance	26.00%
Changes in the portfolio
Beginning balance	€ 36,164	37,365
Refinancing and restructuring of the period	10,191	12,675
Memorandum item: Impact recorded in the income statement for the period	2,659	2,406
Debt repayment	(11,126)	(9,107)
Foreclosure	(731)	(950)
Derecognized from the consolidated balance sheet	(3,660)	(5,334)
Other changes	(311)	1,515
Balance at end of year	€ 30,527	€ 36,164
Credit risk | Forborne loan portfolio | With property collateral
Forborne Loan Portfolio
Percentage of loans secured	52.00%
Performing | Credit risk | Forborne loan portfolio
Forborne Loan Portfolio
Performing loans, number of days past due criteria	90 days
Credit exposure, percentage of total loans	51.00%
Nonperforming | Credit risk | Forborne loan portfolio
Forborne Loan Portfolio
Percentage of loans covered by specific allowance	42.00%

Risk management - Trading Marke

Risk management - Trading Market Risk (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)item	Jan. 02, 2018EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Balance sheet amount
Cash and cash equivalents	€ 113,663	€ 110,995	€ 110,995	€ 76,454	€ 77,751
Financial assets held for trading	92,879	125,618	125,458	148,187
Non-trading financial assets mandatorily at fair value through profit or loss	10,730	4,987
Financial assets designated at fair value through profit or loss	57,460	42,075	34,782	31,609
Financial assets at fair value through other comprehensive income	121,091	126,353
Financial assets at amortised cost	946,099	909,094
Hedging derivatives, Assets	8,607		8,537	10,377
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, ASSETS	1,088		1,287	1,481
Other assets	9,348		9,766	8,447
Total assets	1,459,271	1,443,069	1,444,305	1,339,125
Financial liabilities held for trading	70,343	107,634	107,624	108,765
Financial liabilities designated at fair value through profit or loss	68,058	59,616	59,616	40,263
Financial liabilities at amortised cost	1,171,630	1,126,069	1,126,069	1,044,240
Hedging derivatives, Liabilities	6,363	8,034	8,044	8,156
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	303	330	330	448
Other liabilities	13,088		12,591	11,070
Liabilities	1,351,910	1,337,707	1,337,472	1,236,426
Total equity	107,361	€ 105,362	106,833	102,699	€ 98,753
Market risk
Balance sheet amount
Cash and cash equivalents	113,663
Financial assets held for trading	92,879
Non-trading financial assets mandatorily at fair value through profit or loss	10,730
Financial assets designated at fair value through profit or loss	57,460
Financial assets at fair value through other comprehensive income	121,091
Financial assets at amortised cost	946,099
Hedging derivatives, Assets	8,607
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, ASSETS	1,088
Other assets	107,654
Total assets	1,459,271
Financial liabilities held for trading	70,343
Financial liabilities designated at fair value through profit or loss	68,058
Financial liabilities at amortised cost	1,171,630
Hedging derivatives, Liabilities	6,363
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	303
Other liabilities	35,213
Liabilities	1,351,910
Total equity	€ 107,361
Value At Risk Metric
Balance sheet amount
VaR confidence level, percent	99.00%
Time frame, historical simulation	1 day
Time frame from reference date	2 years
Number of figures calculated daily for VaR | item	2
Financial assets held for trading	€ 92,140
Non-trading financial assets mandatorily at fair value through profit or loss	9,327
Financial assets designated at fair value through profit or loss	56,584
Hedging derivatives, Assets	8,586
Financial liabilities held for trading	70,054
Financial liabilities designated at fair value through profit or loss	67,909
Hedging derivatives, Liabilities	€ 6,357
Value At Risk Metric | Minimum
Balance sheet amount
Time frame from reference date	520 days
Trading market risk
Balance sheet amount
VaR confidence level, percent	99.00%
Main market risk metric
VaR	€ 11.3		10.2	17.9
Trading market risk | Minimum
Main market risk metric
VaR	6.4		9.7
Interest rate risk
Balance sheet amount
Cash and cash equivalents	113,663
Financial assets designated at fair value through profit or loss	876
Financial assets at amortised cost	946,099
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, ASSETS	1,088
Financial liabilities designated at fair value through profit or loss	149
Changes in the fair value of hedged items in portfolio hedges of interest rate risk, Liabilities	303
Main market risk metric
VaR	9.7		7.9	17.9
Interest rate risk | Minimum
Main market risk metric
VaR	5.9
Interest rate; credit spread
Balance sheet amount
Financial assets held for trading	739
Financial assets at fair value through other comprehensive income	121,091
Financial liabilities held for trading	289
Financial liabilities at amortised cost	1,171,630
Interest rate; equities
Balance sheet amount
Non-trading financial assets mandatorily at fair value through profit or loss	1,403
Equity price risk
Main market risk metric
VaR	2.8		€ 1.9	€ 1.4
Equity price risk | Minimum
Main market risk metric
VaR	0.8
Interest and exchange rates
Balance sheet amount
Hedging derivatives, Assets	21
Hedging derivatives, Liabilities	€ 6

Risk management - Trading Mar_2

Risk management - Trading Market Risk - VaR (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)item	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Weighted average
Main market risk metric
VaR	€ 9.7
Trading market risk
Main market risk metric
VaR	€ 11.3	€ 10.2	€ 17.9
Comparison period	2 years
VaR confidence level, percent	99.00%
Number of exceptions for VaE | item	3
VaE confidence level, percent	99.00%
Trading market risk | Minimum
Main market risk metric
VaR	€ 6.4	9.7
Trading market risk | Weighted average
Main market risk metric
VaR	9.7	21.5	18.3
Trading market risk | Maximum
Main market risk metric
VaR	16.6	63.2
Trading market risk | Hedge funds
Main market risk metric
VaR	28
Trading market risk | Monolines
Main market risk metric
VaR	24
Diversification effect
Main market risk metric
VaR	(11.5)	(7.6)	(9.6)
Diversification effect | Minimum
Main market risk metric
VaR	(3.3)
Diversification effect | Weighted average
Main market risk metric
VaR	(9.3)	(8)	(10.3)
Diversification effect | Maximum
Main market risk metric
VaR	(18.7)
Interest rate risk
Main market risk metric
VaR	9.7	7.9	17.9
Interest rate risk | Minimum
Main market risk metric
VaR	5.9
Interest rate risk | Weighted average
Main market risk metric
VaR	9.4	16.2	15.5
Interest rate risk | Maximum
Main market risk metric
VaR	15.5
Equity price risk
Main market risk metric
VaR	2.8	1.9	1.4
Equity price risk | Minimum
Main market risk metric
VaR	0.8
Equity price risk | Weighted average
Main market risk metric
VaR	2.4	3	1.9
Equity price risk | Maximum
Main market risk metric
VaR	6.3
Exchange rate risk
Main market risk metric
VaR	6.2	3.3	4.8
Exchange rate risk | Minimum
Main market risk metric
VaR	1.6
Exchange rate risk | Weighted average
Main market risk metric
VaR	3.9	6.6	6.9
Exchange rate risk | Maximum
Main market risk metric
VaR	11.4
Credit spread
Main market risk metric
VaR	4.1	4.6	3.3
Credit spread | Minimum
Main market risk metric
VaR	1
Credit spread | Weighted average
Main market risk metric
VaR	3.4	3.6	4.2
Credit spread | Maximum
Main market risk metric
VaR	13
Commodity price risk
Main market risk metric
VaR	0	0	0.1
Commodity price risk | Minimum
Main market risk metric
VaR	0
Commodity price risk | Weighted average
Main market risk metric
VaR	0	€ 0	€ 0.1
Commodity price risk | Maximum
Main market risk metric
VaR	€ 0.4

Risk management - Structural Ma

Risk management - Structural Market Risk - Structural VaR (Details) - EUR (€) € in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Diversification effect
Main market risk metric
Value at risk		€ (11.5)	€ (7.6)	€ (9.6)
Exchange rate risk
Main market risk metric
Value at risk		6.2	3.3	4.8
Equity price risk
Main market risk metric
Value at risk		2.8	1.9	1.4
Minimum | Diversification effect
Main market risk metric
Value at risk		(3.3)
Minimum | Exchange rate risk
Main market risk metric
Value at risk		1.6
Minimum | Equity price risk
Main market risk metric
Value at risk		0.8
Weighted average
Main market risk metric
Value at risk		9.7
Weighted average | Diversification effect
Main market risk metric
Value at risk		(9.3)	(8)	(10.3)
Weighted average | Exchange rate risk
Main market risk metric
Value at risk		3.9	6.6	6.9
Weighted average | Equity price risk
Main market risk metric
Value at risk		2.4	3	1.9
Maximum | Diversification effect
Main market risk metric
Value at risk		(18.7)
Maximum | Exchange rate risk
Main market risk metric
Value at risk		11.4
Maximum | Equity price risk
Main market risk metric
Value at risk		€ 6.3
Banking Book | Structural risks
Main market risk metric
VaR percentage		99.00%
Time horizon		1 day
Value at risk		€ 556.8	815.7	922.1
Banking Book | Diversification effect
Main market risk metric
Value at risk		(267.7)	(376.8)	(316.6)
Banking Book | Interest rate; credit spread
Main market risk metric
VaR percentage	99.00%
Time horizon	1 day
Value at risk		319.5	459.6	327.2
Banking Book | Exchange rate risk
Main market risk metric
Value at risk		324.9	471.2	588.5
Banking Book | Equity price risk
Main market risk metric
Value at risk		180.1	261.6	323
Banking Book | Minimum | Structural risks
Main market risk metric
Value at risk		485
Banking Book | Minimum | Diversification effect
Main market risk metric
Value at risk		(319.7)
Banking Book | Minimum | Interest rate; credit spread
Main market risk metric
Value at risk		301.3
Banking Book | Minimum | Exchange rate risk
Main market risk metric
Value at risk		323.3
Banking Book | Minimum | Equity price risk
Main market risk metric
Value at risk		180.1
Banking Book | Weighted average | Structural risks
Main market risk metric
Value at risk		568.5	878	869.3
Banking Book | Weighted average | Diversification effect
Main market risk metric
Value at risk		(325)	(337.3)	(323.4)
Banking Book | Weighted average | Interest rate; credit spread
Main market risk metric
Value at risk	€ 352.5	337.1	373.9	340.6
Banking Book | Weighted average | Exchange rate risk
Main market risk metric
Value at risk		338.9	546.9	603.4
Banking Book | Weighted average | Equity price risk
Main market risk metric
Value at risk		217.6	€ 294.5	€ 248.7
Banking Book | Maximum | Structural risks
Main market risk metric
Value at risk		799.4
Banking Book | Maximum | Diversification effect
Main market risk metric
Value at risk		(355.4)
Banking Book | Maximum | Interest rate; credit spread
Main market risk metric
Value at risk		482.5
Banking Book | Maximum | Exchange rate risk
Main market risk metric
Value at risk		386.2
Banking Book | Maximum | Equity price risk
Main market risk metric
Value at risk		€ 286.1

Risk management - Structural In

Risk management - Structural Interest Rate Risk (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	0.50%
Percentage of reasonably possible decrease in risk assumption	0.50%
Interest rate risk
Structural interest rate risk
Value at risk	€ 9.7	€ 7.9	€ 17.9
Interest rate risk | 100 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	1.00%
Percentage of reasonably possible decrease in risk assumption	1.00%
Interest rate risk | 25 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	0.25%
Percentage of reasonably possible decrease in risk assumption	0.25%
Interest rate risk | 50 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	0.50%
Percentage of reasonably possible decrease in risk assumption	(0.50%)
Interest rate risk | 75 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	0.75%
Percentage of reasonably possible decrease in risk assumption	0.75%
Interest rate risk | Latin America | 100 basis points
Structural interest rate risk
Percentage of reasonably possible decrease in risk assumption	1.00%
Banking Book | Interest rate risk | Europe and United States | 100 basis points
Structural interest rate risk
Period covered by sensitivity analysis	1 year
Percentage of reasonably possible decrease in risk assumption	1.00%
Banking Book | Interest rate risk | Europe and United States | EUR | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	€ 269
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	269
Banking Book | Interest rate risk | Europe and United States | GBP | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	203
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	203
Banking Book | Interest rate risk | Europe and United States | USD | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	130
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	130
Banking Book | Interest rate risk | Europe and United States | Polish zloty | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	53
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	€ 53
Banking Book | Interest rate risk | Latin America | 100 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	1.00%
Banking Book | Interest rate risk | BRAZIL | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	€ 45
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	45
Banking Book | Interest rate risk | CHILE | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	35
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	35
Banking Book | Interest rate risk | MEXICO | 100 basis points
Structural interest rate risk
Increase (decrease) in profit (loss) due to reasonably possible increase in designated risk component	12
Increase (decrease) in profit (loss) due to reasonably possible decrease in designated risk component	€ 12
Banking Book | Net interest income risk | Europe and United States | 100 basis points
Structural interest rate risk
Percentage of reasonably possible increase in risk assumption	1.00%
Banking Book | Net interest income risk | Latin America | 100 basis points
Structural interest rate risk
Period covered by sensitivity analysis	1 year
Banking Book | Market value of equity | Latin America | 100 basis points
Structural interest rate risk
Period covered by sensitivity analysis	1 year
Percentage of reasonably possible increase in risk assumption	1.00%
Percentage of reasonably possible decrease in risk assumption	1.00%
Banking Book | Market value of equity | BRAZIL | 100 basis points
Structural interest rate risk
Increase (decrease) in equity due to reasonably possible increase in designated risk component	€ 419
Increase (decrease) in equity due to reasonably possible decrease in designated risk component	419
Banking Book | Market value of equity | CHILE | 100 basis points
Structural interest rate risk
Increase (decrease) in equity due to reasonably possible increase in designated risk component	219
Increase (decrease) in equity due to reasonably possible decrease in designated risk component	219
Banking Book | Market value of equity | MEXICO | 100 basis points
Structural interest rate risk
Increase (decrease) in equity due to reasonably possible increase in designated risk component	172
Increase (decrease) in equity due to reasonably possible decrease in designated risk component	€ 172

Risk management - Structural Fo

Risk management - Structural Foreign Currency Risk (Details)	12 Months Ended
	Dec. 31, 2018
Exchange rate risk
Main market risk metric
Core capital ratio (as a percent)	100.00%

Risk management - Structural Eq

Risk management - Structural Equity Risk (Details) - Equity price risk - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of nature and extent of risks arising from financial instruments [line items]
VaR	€ 2.8	€ 1.9	€ 1.4
Equity instruments
Disclosure of nature and extent of risks arising from financial instruments [line items]
VaR percentage	99.00%
Time horizon	1 day
VaR	€ 180.1	€ 261.6	€ 323

Risk management - Liquidity and

Risk management - Liquidity and Funding Risk (Details)	12 Months Ended
	Dec. 31, 2018item
Liquidity risk
Liquidity management
Number of main pillars for liquidity risk	3

Risk management - Liquidity a_2

Risk management - Liquidity and Funding Risks, On and Off Balance Sheet Encumbrances (Details)	12 Months Ended
	Dec. 31, 2018EUR (€)component	Jan. 02, 2018EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)
Encumbered assets and collateral received and matching liabilities
Assets	€ 1,459,271,000,000	€ 1,443,069,000,000	€ 1,444,305,000,000	€ 1,339,125,000,000
Liquidity risk
Encumbered assets and collateral received and matching liabilities
Percent of total assets encumbered	24.80%
Total assets encumbered	€ 1,587,800
With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Matching liabilities, contingent liabilities or securities lent	301,600,000
Assets, collateral received and own debt securities issued other than covered bonds and ABSs encumbered	€ 391,800,000
Number of categories of encumbered assets | component	2
Structural funding transactions, percentage	12.80%
With property collateral | More than 12 months | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Percent of total assets encumbered	51.50%
With property collateral | Within one year | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Percent of total assets encumbered	48.50%
On-balance-sheet assets | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	€ 322,200,000
Percent of total assets encumbered	67.00%
On-balance-sheet assets | With property collateral | Unmatured | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	€ 28,500,000
On-balance-sheet assets | With property collateral | 1 month | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	53,700,000
On-balance-sheet assets | With property collateral | 3 months | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	11,900,000
On-balance-sheet assets | With property collateral | 3 to 12 months | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	29,000,000
On-balance-sheet assets | With property collateral | 2019 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	78,600,000
On-balance-sheet assets | With property collateral | 2020 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	55,400,000
On-balance-sheet assets | With property collateral | 3 to 5 years | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	28,100,000
On-balance-sheet assets | With property collateral | 2023 to 2027 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	20,400,000
On-balance-sheet assets | With property collateral | Later than ten years [member] | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	16,500,000
On-balance-sheet assets | Without collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of asset	1,137,100,000
On-balance-sheet assets | Loan commitments | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	214,600,000
On-balance-sheet assets | Loan commitments | Without collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of asset	855,000,000
On-balance-sheet assets | Equity instruments | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	4,200,000
Fair value of asset	4,200,000
On-balance-sheet assets | Equity instruments | Without collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	10,700,000
Fair value of asset	10,700,000
On-balance-sheet assets | Debt instruments | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	76,300,000
Fair value of asset	76,300,000
On-balance-sheet assets | Debt instruments | Without collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	114,800,000
Fair value of asset	114,800,000
On-balance-sheet assets | Other assets Member | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Assets	27,100,000
On-balance-sheet assets | Other assets Member | Without collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of asset	156,600,000
Off-balance-sheet assets | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	69,600,000
Fair value of collateral received or own debt securities issued available for encumbrance	48,900,000
Off-balance-sheet assets | With property collateral | Unmatured | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	24,600,000
Off-balance-sheet assets | With property collateral | 1 month | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	15,800,000
Off-balance-sheet assets | With property collateral | 3 months | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	10,700,000
Off-balance-sheet assets | With property collateral | 3 to 12 months | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	10,300,000
Off-balance-sheet assets | With property collateral | 2019 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,800,000
Off-balance-sheet assets | With property collateral | 2020 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,800,000
Off-balance-sheet assets | With property collateral | 3 to 5 years | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,700,000
Off-balance-sheet assets | With property collateral | 2023 to 2027 | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,800,000
Off-balance-sheet assets | With property collateral | Later than ten years [member] | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,100,000
Off-balance-sheet assets | Equity instruments | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	2,700,000
Fair value of collateral received or own debt securities issued available for encumbrance	6,000,000
Off-balance-sheet assets | Debt instruments | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	65,000,000
Fair value of collateral received or own debt securities issued available for encumbrance	42,900,000
Off-balance-sheet assets | Other collateral received | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of encumbered collateral received or own debt securities issued	1,900,000
Off-balance-sheet assets | Own debt securities issued other than own covered bonds or ABSs | With property collateral | Liquidity risk
Encumbered assets and collateral received and matching liabilities
Fair value of collateral received or own debt securities issued available for encumbrance	€ 1,400,000

Risk management - Capital Risk

Risk management - Capital Risk (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	11.47%	12.26%
Tier 1 phase in capital ratio	13.12%	12.77%
Total phase-in capital	14.98%	14.99%
CET1 fully loaded ratio	11.30%
Minimum
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	9.70%
Pillar 1 percentage	4.50%
Pillar 2 percentage	1.50%
Capital conservation buffer, percentage	2.50%
Globally Systemically Important Entity percentage	1.00%
Percentage of anti cyclical buffer on common equity Tier1 capital	0.20%
Tier 1 phase in capital ratio	1.50%
Total phase-in capital	13.20%

Risk management - Regulatory Ca

Risk management - Regulatory Capital (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Nov. 01, 2017	Jul. 03, 2017	Dec. 31, 2016	Nov. 04, 2016	Dec. 31, 2015
Risk management
CET1 fully loaded ratio	11.30%
Subscribed capital	€ 8,118	€ 8,068	€ 8,068	€ 48	€ 729	€ 7,291	€ 74	€ 7,217
Share premium account	50,993	51,053	51,053		€ 6,343	44,912
Reserves	53,988		52,577
Treasury shares	(59)	(22)	(22)			(7)
Attributable profit	7,810	6,619	6,619			6,204
Approved dividends	(2,237)	(2,029)	(2,029)			(1,667)
Total equity attributable to owners of parent	118,613		116,265
Valuation Adjustments	(22,141)		(21,777)
Non-controlling interests	10,889	12,236	12,344			11,761
TOTAL EQUITY	107,361	€ 105,362	106,833			€ 102,699		€ 98,753
Goodwill and intangible assets	(28,644)		(28,537)
Eligible preference shares and preferred securities	9,754		7,635
Accrued dividend	(1,055)		(968)
Other adjustments	(9,700)		(7,679)
Tier I (Phase-in)	€ 77,716		€ 77,283

Risk management - Regulatory _2

Risk management - Regulatory Capital Phase-in Coefficients (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Risk management
Level 1 ordinary eligible capital (millions of euros)	€ 67,962	€ 74,173
Level 1 additional eligible capital (millions of euros)	9,754	3,110
Level 2 eligible capital (millions of euros)	11,009	13,422
Risks (millions of euros)	€ 592,319	€ 605,064
Level 1 ordinary capital coefficient (CET 1) (as a percent)	11.47%	12.26%
Level 1 additional capital coefficient (AT1) (as a percent)	1.65%	0.51%
Level 1 phase in capital ratio (as a percent)	13.12%	12.77%
Level 2 capital coefficient (TIER 2) (as a percent)	1.86%	2.22%
Total capital coefficient (as a percent)	14.98%	14.99%

Risk management - Regulatory _3

Risk management - Regulatory Capital Alternative Standard (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Nov. 01, 2017	Jul. 03, 2017	Dec. 31, 2016	Nov. 04, 2016	Dec. 31, 2015
Eligible Capital
Common Equity Tier 1	€ 67,962		€ 74,173
CAPITAL	8,118	€ 8,068	8,068	€ 48	€ 729	€ 7,291	€ 74	€ 7,217
(-) Treasury shares and own shares financed	(64)		(22)
Share premium	50,993	€ 51,053	51,053		€ 6,343	€ 44,912
Reserves	55,036		52,241
Other retained earnings	(23,022)		(22,363)
Minority interests	6,981		7,991
Profit net of dividends	4,518		3,621
Deductions	(34,598)		(26,416)
Goodwill and intangible assets	(28,644)		(22,829)
Others	(5,954)		(3,586)
Additional Tier I	9,754		3,110
Eligible instruments AT1	9,666		8,498
T1 excesses - subsidiaries	88		347
Residual value of intangibles			(5,707)
Deductions			(27)
Tier II	11,009		13,422
Eligible instruments AT2	11,306		9,901
Gen. Funds and surplus loans loss prov. IRB			3,823
T2 excesses - subsidiaries	(297)		(275)
Deductions			(27)
TOTAL ELIGIBLE CAPITAL	€ 88,725		€ 90,706

Risk management - Regulatory _4

Risk management - Regulatory Capital Other Information (Details) € in Millions	12 Months Ended
	Dec. 31, 2018EUR (€)companycomponent	Dec. 31, 2017EUR (€)
IFRS Leverage Ratios [Abstract]
Level 1 Capital (millions of euros)	€ 77,716	€ 77,283
Exposure (millions of euros)	€ 1,489,094	€ 1,463,090
Leverage Ratio (as a percent)	5.22%	5.28%
Global systemically important banks
Number of global systemically important banks (G-SIBs) | company	30
Number of criteria determining designation as global systemically important bank | component	5
Capital buffer percentage	1.00%

Additional disclosures - Parent

Additional disclosures - Parent-Only Balance Sheets (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jan. 02, 2018	Dec. 31, 2017	Nov. 01, 2017	Jul. 03, 2017	Dec. 31, 2016	Nov. 04, 2016	Dec. 31, 2015
Assets [abstract]
Cash and bank balances at central banks	€ 89,005		€ 87,430			€ 54,637
Financial assets held for trading	92,879	€ 125,618	125,458			148,187
Held-to-maturity investments			13,491			14,468
Loans and receivables			903,013			840,004
Investments		6,150	6,184
Premises and equipment, net	24,594		20,650			20,770
Other assets	9,348		9,766			8,447
TOTAL ASSETS	1,459,271	1,443,069	1,444,305			1,339,125
Liabilities [abstract]
Other liabilities	13,088		12,591			11,070
TOTAL LIABILITIES	1,351,910	1,337,707	1,337,472			1,236,426
Shareholders' equity
Share capital	8,118	8,068	8,068	€ 48	€ 729	7,291	€ 74	€ 7,217
TOTAL EQUITY	107,361	105,362	106,833			102,699		€ 98,753
TOTAL LIABILITIES AND EQUITY	1,459,271	€ 1,443,069	1,444,305			1,339,125
Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Cash and bank balances at central banks	105,660		76,690			49,979
Financial assets held for trading	70,825		64,326			70,437
Held-to-maturity investments	61,064		49,194			45,702
Loans and receivables	263,142		197,591			195,532
Investments	81,734		85,428			80,614
Premises and equipment, net	2,410		1,929			1,834
Other assets	23,541		17,257			17,146
TOTAL ASSETS	608,376		492,415			461,244
Liabilities [abstract]
Deposits	350,786		256,389			265,565
Short-term debt	30,883		40,540			19,110
Long-term debt	75,600		53,023			34,499
Total borrowings	106,483		93,563			53,609
Other liabilities	82,340		71,896			78,835
TOTAL LIABILITIES	539,609		421,848			398,009
Shareholders' equity
Share capital	8,118		8,068			7,291
Retained earnings and other reserves	60,649		62,499			55,944
TOTAL EQUITY	68,767		70,567			63,235
TOTAL LIABILITIES AND EQUITY	608,376		492,415			461,244
Bank Subsidiaries [Member] | Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Cash and bank balances at central banks	16,339		20,818			11,442
Held-to-maturity investments	11,084		6,474			8,326
Investments	69,118		65,567			63,210
Liabilities [abstract]
Deposits	18,526		20,391			19,179
Total borrowings	2,874		1,138
Non-Bank Subsidiaries [Member] | Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Held-to-maturity investments	4,581		3,729			3,662
Loans and receivables	26,505		33,113			35,085
Investments	12,616		19,861			17,404
Liabilities [abstract]
Deposits	13,655		13,115			40,082
Total borrowings	€ 998		€ 2,966			€ 14,062

Additional disclosures - Pare_2

Additional disclosures - Parent-Only Income Statements (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Dividend income	€ 370	€ 384	€ 413
Interest expense	(19,984)	(21,745)	(24,067)
Non-interest income	1,643	1,618	1,919
Non-interest expense	(2,000)	(1,966)	(1,977)
Operating profit / (loss) before tax	14,201	12,091	10,768
Tax expense or income from continuing operations	(4,886)	(3,884)	(3,282)
Net income	9,315	8,207	7,486
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Interest income	7,660	5,733	6,023
Dividend income	3,872	3,320	3,459
Interest and dividends from affiliates	11,532	9,053	9,482
Interest expense	(3,861)	(3,204)	(3,113)
Interest income/(Charges)	7,671	5,849	6,369
Provision for credit losses	(686)	(451)	(528)
Interest income/ (Charges) after provision for credit losses	6,985	5,398	5,841
Non-interest income	3,972	3,872	3,403
Non-interest expense	(7,573)	(6,293)	(7,115)
Operating profit / (loss) before tax	3,384	2,977	2,129
Tax expense or income from continuing operations	(83)	29	352
Net income	3,301	3,006	2,481
Banco Santander S.A. | Reportable Legal Entities [Member] | Bank Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Dividend income	2,874	2,580	2,686
Banco Santander S.A. | Reportable Legal Entities [Member] | Non-Bank Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Dividend income	€ 998	€ 740	€ 773

Additional disclosures - Pare_3

Additional disclosures - Parent-Only Comprehensive Income Statements (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Statement of Income Captions [Line Items]
Profit (loss)	€ 9,315	€ 8,207	€ 7,486
OTHER RECOGNIZED INCOME AND EXPENSE	(1,899)	(7,320)	(303)
Other comprehensive income that will be reclassified to profit or loss, net of tax	(2,231)	(7,232)	503
Financial assets available-for-sale		683	1,326
Revaluation gains (losses)		1,137	2,192
Amounts transferred to income statement		(454)	(866)
Cash flow hedges (Effective portion)	174	(441)	495
Revaluation gains (losses)	491	501	6,231
Amounts transferred to income statement	(317)	(942)	(5,736)
Hedges of net investments in foreign operations (Effective portion)	(2)	614	(1,329)
Revaluation gain (losses)	(2)	614	(1,330)
Amounts transferred to income statement			1
Income tax relating to components of other comprehensive income that may be reclassified to profit or loss	139	(4)	(745)
Other comprehensive income that will not be reclassified to profit or loss, net of tax	332	(88)	(806)
Actuarial gains and losses on defined benefit pension plans	618	(157)	(1,172)
Income tax relating to items that will not be reclassified to profit or loss	(222)	68	367
Total recognized income and expenses	7,416	887	7,183
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Statement of Income Captions [Line Items]
Profit (loss)	3,301	3,006	2,481
OTHER RECOGNIZED INCOME AND EXPENSE	(410)	(356)	364
Other comprehensive income that will be reclassified to profit or loss, net of tax	(348)	(341)	439
Financial assets available-for-sale	(634)	(625)	619
Revaluation gains (losses)	(135)	(283)	830
Amounts transferred to income statement	(499)	(342)	(211)
Cash flow hedges (Effective portion)	137	(7)	4
Revaluation gains (losses)	153	(7)	4
Amounts transferred to income statement	(16)
Income tax relating to components of other comprehensive income that may be reclassified to profit or loss	149	291	(184)
Other comprehensive income that will not be reclassified to profit or loss, net of tax	(62)	(15)	(75)
Actuarial gains and losses on defined benefit pension plans	43	(23)	(106)
Other valuation adjustments	(78)
Income tax relating to items that will not be reclassified to profit or loss	(27)	8	31
Total recognized income and expenses	€ 2,891	€ 2,650	€ 2,845

Additional disclosures - Pare_4

Additional disclosures - Parent-Only Cash Flow Statements (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Cash Flow Statements, Captions [Line Items]
Profit (loss)	€ 9,315	€ 8,207	€ 7,486
Adjustments to profit	21,714	23,927	22,032
Net increase/(decrease) in operating assets	(51,550)	(18,349)	(17,966)
Increase (decrease) in operating liabilities	27,279	30,540	13,143
Income tax recovered/(paid)	(3,342)	(4,137)	(2,872)
CASH FLOWS FROM OPERATING ACTIVITIES	3,416	40,188	21,823
Investments (-)	(12,936)	(10,134)	(18,204)
Divestments (+)	16,084	6,126	4,440
CASH FLOWS FROM INVESTING ACTIVITIES	3,148	(4,008)	(13,764)
Proceeds from issuance of own equity instruments		7,072
Proceeds from disposal of own equity instruments	989	1,331	1,604
Payments for acquisition of own equity instrument	(1,026)	(1,309)	(1,380)
Dividends paid	(3,118)	(2,665)	(2,309)
Other payments related to financing activities	(925)	(1,802)	(943)
CASH FLOWS FROM FINANCING ACTIVITIES	(3,301)	4,206	(5,745)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	(595)	(5,845)	(3,611)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	2,668	34,541	(1,297)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	110,995	76,454	77,751
CASH AND CASH EQUIVALENTS AT END OF PERIOD	113,663	110,995	76,454
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Profit (loss)	3,301	3,006	2,481
Adjustments to profit	11,576	1,824	1,245
Net increase/(decrease) in operating assets	(17,566)	(10,430)	36,393
Increase (decrease) in operating liabilities	13,411	21,915	(36,632)
Income tax recovered/(paid)	(279)	(839)	151
CASH FLOWS FROM OPERATING ACTIVITIES	10,443	15,476	3,638
Investments (-)	(1,472)	(8,818)	(4,419)
Divestments (+)	10,197	4,995	7,249
CASH FLOWS FROM INVESTING ACTIVITIES	8,725	(3,823)	2,830
Proceeds from issuance of own equity instruments		7,072
Proceeds from disposal of own equity instruments	805	1,004	957
Payments for acquisition of own equity instrument	(816)	(972)	(943)
Issuance of debt securities	2,750	2,894	2,346
Redemption of debt securities	(827)	(764)	(5,333)
Dividends paid	(3,118)	(2,665)	(2,308)
Other payments related to financing activities	(2)	532
CASH FLOWS FROM FINANCING ACTIVITIES	(1,208)	7,101	(5,281)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	237	(655)	289
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	18,197	18,099	1,476
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	33,734	15,635	14,159
CASH AND CASH EQUIVALENTS AT END OF PERIOD	€ 51,931	€ 33,734	€ 15,635

Additional disclosures - Prefer

Additional disclosures - Preference Shares and Preferred Securities (Details) € in Millions, £ in Millions	Dec. 31, 2018GBP (£)	Dec. 31, 2018EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount		€ 23,820	€ 21,510	€ 19,902	€ 21,153
Subordinated liabilities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount		10,063	8,773	7,329
Preference Shares | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount		345	404	413
Preferred Securities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount		€ 9,717	€ 8,369	€ 6,916
Santander UK plc | Convertible Subordinated Issue
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 2,041

Additional disclosures - Pref_2

Additional disclosures - Preference Shares and Securities Detail (Details) € / shares in Units, € in Millions, £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018GBP (£)	Feb. 06, 2019	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)€ / shares	Dec. 31, 2017EUR (€)	Jul. 03, 2017€ / shares	Dec. 31, 2016EUR (€)	Dec. 31, 2015EUR (€)
Disclosure of detailed information about financial instruments [line items]
Notional amount				€ 318,807
Variable interest rate ( as a percent)		4.989%
Par value per share | € / shares				€ 0.50		€ 0.50
Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 23,820	€ 21,510		€ 19,902	€ 21,153
CCPSs
Disclosure of detailed information about financial instruments [line items]
Common Equity Tier 1 Ratio (CET1) maximum threshold percentage for conversion of the subordinated issue	5.125%		5.125%	5.125%
Subordinated liabilities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 10,063	8,773		7,329
Preference Shares | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 345	404		413
Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	6.984%		6.984%	6.984%
Preferred Securities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 9,717	€ 8,369		€ 6,916
LIBOR GBP 6M Interest Rate [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	1.86%		1.86%	1.86%
Banco Santander (Brasil) S.A | Tier 1 Perpetual Subordinated Notes
Disclosure of detailed information about financial instruments [line items]
Notional amount | $			$ 1,248
Percentage of perpetual subordinated notes acquired	89.60%		89.60%	89.60%
Common Equity Tier 1 Ratio (CET1) maximum threshold percentage for conversion of the subordinated issue	5.125%		5.125%	5.125%
Issuance By Santander UK PLC In October 1995 [Member] | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 80.3
Issuance By Santander UK PLC In October 1995 [Member] | Fixed interest rate | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	10.375%		10.375%	10.375%
Issuance By Santander UK PLC In February 1996 [Member] | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 80.3
Issuance By Santander UK PLC In February 1996 [Member] | Fixed interest rate | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	10.375%		10.375%	10.375%
Issuance By Santander UK PLC In May 2006 [Member]
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	1.13%		1.13%	1.13%
Reference rate, after initial interest rate period	3-Month GBP LIBOR
Issuance By Santander UK PLC In May 2006 [Member] | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 13.8
Interest rate (as a percent)	6.22%		6.22%	6.22%
Issuance By Santander UK PLC In May 2006 [Member] | Fixed interest rate | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	6.22%		6.22%	6.22%
Issuance By Santander Bank, National Association In August 2000 [Member] | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 153
Issuance By Santander Bank, National Association In August 2000 [Member] | Fixed interest rate | Preference Shares
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	12.00%		12.00%	12.00%
Issuance By Banco Espanol De Credito In October 2004 [Member] | CMS 10 Interest rate [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 36.5
Variable interest rate ( as a percent)	0.125%		0.125%	0.125%
Issuance By Banco Espanol De Credito In November 2004 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 106.5
Interest rate (as a percent)	5.50%		5.50%	5.50%
Issuance By Banco Santander S.A. In March 2014 [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amount				€ 1,500
Interest rate (as a percent)	6.25%		6.25%	6.25%
Initial interest rate term	5 years
Adjustment to reference rate, after initial interest rate period	5.41%		5.41%	5.41%
Reference rate, after initial interest rate period	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In March 2014 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 1,500
Interest rate (as a percent)	6.25%		6.25%	6.25%
Issuance By Banco Santander S.A. In March 2014 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	5.41%		5.41%	5.41%
Issuance By Banco Santander S.A. In May 2014 [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amount | $			$ 1,500
Interest rate (as a percent)	6.375%		6.375%	6.375%
Initial interest rate term	5 years
Adjustment to reference rate, after initial interest rate period	4.788%		4.788%	4.788%
Reference rate, after initial interest rate period	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In May 2014 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 1,500
Interest rate (as a percent)	6.375%		6.375%	6.375%
Issuance By Banco Santander S.A. In May 2014 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.788%		4.788%	4.788%
Issuance By Banco Santander S.A. In September 2014 [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amount				€ 1,500
Interest rate (as a percent)	6.25%		6.25%	6.25%
Initial interest rate term	7 years
Adjustment to reference rate, after initial interest rate period	5.64%		5.64%	5.64%
Reference rate, after initial interest rate period	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In September 2014 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 1,500
Interest rate (as a percent)	6.25%		6.25%	6.25%
Issuance By Banco Santander S.A. In September 2014 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	5.64%		5.64%	5.64%
Issuance Number One By Santander Finance Capital S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 18.2
Interest rate (as a percent)	2.00%		2.00%	2.00%
Issuance Number Two By Santander Finance Capital S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 25
Interest rate (as a percent)	2.00%		2.00%	2.00%
Issuance Number Three By Santander Finance Capital S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 306.9
Interest rate (as a percent)	0.05%		0.05%	0.05%
Issuance Number Four By Santander Finance Capital S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 153.4
Interest rate (as a percent)	2.00%		2.00%	2.00%
Issuance By Santander Finance Preferred S.A. In September 2004 [Member] | CMS 10 Interest rate [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 144
Variable interest rate ( as a percent)	0.05%		0.05%	0.05%
Issuance By Santander Finance Preferred S.A. In October 2004 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 155
Interest rate (as a percent)	5.75%		5.75%	5.75%
Issuance By Santander Finance Preferred S.A. In March 2007 [Member] | US 3M Interest Rate [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 210.4
Variable interest rate ( as a percent)	0.52%		0.52%	0.52%
Issuance By Santander Finance Preferred S.A. In July 2007 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 4.9
Interest rate (as a percent)	7.01%		7.01%	7.01%
Issuance Number One By Santander International Preferred S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 979.7
Interest rate (as a percent)	2.00%		2.00%	2.00%
Issuance Number Two By Santander International Preferred S.A. In March 2009 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 8.6
Interest rate (as a percent)	2.00%		2.00%	2.00%
Issuance By Abbey National PLC In February 2001 [Member] | Santander UK plc | LIBOR GBP 6M Interest Rate [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £	£ 1.8
Variable interest rate ( as a percent)	1.86%		1.86%	1.86%
Issuance By Abbey National PLC In August 2002 [Member]
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	6.984%		6.984%	6.984%
Issuance By Banco Santander (Brasil) S.A. In January 2014 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 129.6
Interest rate (as a percent)	7.38%		7.38%	7.38%
Issuance by Banco Popular Pastor FRN, June 2004 [Member] | Fixed interest rate | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 11.7
Interest rate (as a percent)	2.07%		2.07%	2.07%
Issuance By Banco Santander In April 2017 [Member]
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	5 years
Reference rate, after initial interest rate period	5-year Mid-Swap Rate
Issuance By Banco Santander In April 2017 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 750
Interest rate (as a percent)	6.75%		6.75%	6.75%
Issuance By Banco Santander In April 2017 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	6.803%		6.803%	6.803%
issuance By Banco Santander In September 2017 [Member]
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	6 years
Reference rate, after initial interest rate period	5-year Mid-Swap Rate
issuance By Banco Santander In September 2017 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 1,000
Interest rate (as a percent)	5.25%		5.25%	5.25%
issuance By Banco Santander In September 2017 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.999%		4.999%	4.999%
Issuance By Banco Santander In March 2018 [Member]
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	7 years
Reference rate, after initial interest rate period	5-Year Mid-Swap Rate
Issuance By Banco Santander In March 2018 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 1,500
Interest rate (as a percent)	4.75%		4.75%	4.75%
Issuance By Banco Santander In March 2018 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.097%		4.097%	4.097%