Banco Santander (SAN) 6-K 1 Aug 19 2019 H1 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	BANCO SANTANDER, S.A.
Entity Central Index Key	0000891478
Document Type	6-K
Document Period End Date	Jun. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	H1

Condensed Balance Sheets

Condensed Balance Sheets - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
ASSETS
CASH, CASH BALANCES AT CENTRAL BANKS AND OTHER DEPOSITS ON DEMAND	€ 104,104	€ 113,663
FINANCIAL ASSETS HELD FOR TRADING	102,574	92,879
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	5,393	10,730
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS:	73,420	57,460
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	118,062	121,091
FINANCIAL ASSETS AT AMORTIZED COST	981,046	946,099
HEDGING DERIVATIVES, ASSETS	8,451	8,607
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, ASSETS	1,621	1,088
INVESTMENTS	7,788	7,588
Joint ventures entities	962	979
Associated companies	6,826	6,609
ASSETS UNDER INSURANCE OR REINSURANCE CONTRACTS	311	324
TANGIBLE ASSETS	33,755	26,157
Property, plant and equipment:	32,651	24,594
Investment property:	1,104	1,563
INTANGIBLE ASSETS	28,794	28,560
Goodwill	25,613	25,466
Other intangible assets	3,181	3,094
TAX ASSETS	30,102	30,251
Current tax assets	6,502	6,993
Deferred tax assets	23,600	23,258
OTHER ASSETS	12,140	9,348
Insurance contracts linked to pensions	207	210
Inventories	5	147
Other	11,928	8,991
NON-CURRENT ASSETS HELD FOR SALE	4,535	5,426
TOTAL ASSETS	1,512,096	1,459,271
LIABILITIES AND EQUITY
FINANCIAL LIABILITIES HELD FOR TRADING	74,187	70,343
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	60,237	68,058
FINANCIAL LIABILITIES AT AMORTIZED COST	1,224,194	1,171,630
HEDGING DERIVATIVES, LIABILITIES	7,267	6,363
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK, LIABILITIES	296	303
LIABILITIES UNDER INSURANCE OR REINSURANCE CONTRACTS	731	765
PROVISIONS	14,571	13,225
TAX LIABILITIES	9,838	8,135
Current tax liabilities	3,230	2,567
Deferred tax liabilities	6,608	5,568
OTHER LIABILITIES	10,790	13,088
TOTAL LIABILITIES	1,402,111	1,351,910
SHAREHOLDERS' EQUITY	120,054	118,613
CAPITAL	8,118	8,118
Called up paid capital	8,118	8,118
SHARE PREMIUM	50,993	50,993
EQUITY INSTRUMENTS ISSUED OTHER THAN CAPITAL	581	565
Other equity instruments	581	565
OTHER EQUITY	155	234
ACCUMULATED RETAINED EARNINGS	61,049	56,756
OTHER RESERVES	(4,061)	(3,567)
(-) OWN SHARES	(12)	(59)
PROFIT ATTRIBUTABLE TO SHAREHOLDERS OF THE PARENT	3,231	7,810
(-) INTERIM DIVIDENDS		(2,237)
OTHER ACCUMULATED COMPREHENSIVE INCOME	(21,425)	(22,141)
ITEMS NOT RECLASSIFIED TO PROFIT OR LOSS	(3,625)	(2,936)
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS	(17,800)	(19,205)
NON-CONTROLLING INTEREST	11,356	10,889
Other comprehensive income	(1,149)	(1,292)
Other items	12,505	12,181
TOTAL EQUITY	109,985	107,361
TOTAL LIABILITIES AND EQUITY	1,512,096	1,459,271
Provision for pensions and other employment defined benefit obligations
LIABILITIES AND EQUITY
PROVISIONS	6,216	5,558
Provision for other long term employee benefits
LIABILITIES AND EQUITY
PROVISIONS	1,708	1,239
Provision for taxes and other legal contingencies
LIABILITIES AND EQUITY
PROVISIONS	3,153	3,174
Provision for contingent liabilities and commitments
LIABILITIES AND EQUITY
PROVISIONS	728	779
Other provisions member
LIABILITIES AND EQUITY
PROVISIONS	2,766	2,475
For own use
ASSETS
Property, plant and equipment:	14,522	8,150
Leased out under an operating lease
ASSETS
Property, plant and equipment:	18,129	16,444
Investment property:	€ 794	€ 1,195

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Memorandum Items [Abstract]
Acquired in lease, investment property	€ 6,608	€ 98
Loan commitments
Memorandum Items [Abstract]
Off-balance sheet amounts	223,954	218,083
Financial Guarantees
Memorandum Items [Abstract]
Off-balance sheet amounts	12,077	11,723
Other Commitments [Member]
Memorandum Items [Abstract]
Off-balance sheet amounts	94,785	74,389
Financial liabilities at amortized cost
Memorandum Items [Abstract]
Subordinated liabilities	21,419	23,820
Financial assets held for trading, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	28,424	23,495
Financial assets designated at fair value through profit or loss, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	8,221	6,477
Financial assets at fair value through other comprehensive income, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	26,458	35,558
Financial assets at amortised cost, category
Memorandum Items [Abstract]
Lent or delivered as guarantee with disposal or pledge rights	€ 20,466	€ 18,271

Consolidated Income Statements

Consolidated Income Statements - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	€ 28,669	€ 26,904
Other interest income	2,253	1,345
Interest expense	(11,033)	(9,973)
Interest income / charges	17,636	16,931
Dividend income	361	264
Income from companies accounted for using the equity method	306	354
Commission income	7,502	7,475
Commission expense	(1,639)	(1,586)
Gains or losses on financial assets and liabilities not measured at fair value through profit or loss, net	350	326
Gains or losses on financial assets and liabilities at amortised cost, net	105	16
Other financial assets and liabilities	245	310
Gains or losses on financial assets and liabilities held for trading, net	(12)	1,197
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss	215	56
Gains or losses on financial assets and liabilities measured at fair value through profit or loss, net	(207)	132
Gains or losses from hedge accounting, net	(26)	33
Exchange differences, net	191	(890)
Other operating income	855	813
Other operating expenses	(1,136)	(979)
Income from assets under insurance and reinsurance contracts	1,630	1,756
Expenses from liabilities under insurance and reinsurance contracts	(1,590)	(1,720)
Total income	24,436	24,162
Administrative expenses	(10,110)	(10,265)
Personnel expenses	(6,080)	(5,960)
Other general administrative expenses	(4,030)	(4,305)
Depreciation and amortisation cost	(1,477)	(1,217)
Provisions or reversal of provisions, net	(1,916)	(1,262)
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	(4,368)
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net (preIFRS9)		(4,352)
Impairment or reversal of impairment on non-financial assets, net	(27)	(96)
Impairment or reversal of impairment on tangible assets, net	(19)	(33)
Impairment or reversal of impairment on intangible assets, net	(2)	(64)
Impairment or reversal of impairment on other assets, net	(6)	1
Gains or losses on non-financial assets and investments, net	250	23
Gains or losses on non-current assets held for sale not classified as discontinued operations	(257)	(94)
Operating profit / (loss) before tax	6,531	6,899
Tax expense or income from continuing operations	(2,449)	(2,378)
Profit from continuing operations	4,082	4,521
CONSOLIDATED PROFIT FOR THE YEAR	4,082	4,521
Profit (loss), attributable to [abstract]
Profit attributable to non-controlling interests	851	769
Profit attributable to the parent	€ 3,231	€ 3,752
Earnings per share [abstract]
Basic	€ 0.180	€ 0.220
Diluted	€ 0.180	€ 0.220
Financial assets at fair value through other comprehensive income, category
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	€ 2,020	€ 2,548
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	(6)
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net (preIFRS9)		(1)
Financial assets at amortised cost, category
IFRS Statement [Line Items]
Interest income calculated using the effective interest method	24,396	23,011
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net	€ (4,362)
Impairment or reversal of impairment on financial assets not measured at fair value through profit or loss, net (preIFRS9)		€ (4,351)

Statements of Recognized Income

Statements of Recognized Income and Expense - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of comprehensive income [abstract]
CONSOLIDATED PROFIT FOR THE YEAR	€ 4,082	€ 4,521
OTHER RECOGNIZED INCOME AND EXPENSE	859	(2,000)
Total items that will not be reclassified to profit or loss	(708)	538
Actuarial gains and losses on defined benefit pension plans	(833)	981
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	(21)	(136)
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(120)	(33)
Income tax relating to items that will not be reclassified to profit or loss	266	(274)
Total items that may be reclassified to profit or loss	1,567	(2,538)
Hedges of net investments in foreign operations (Effective portion)	(762)	293
Revaluation gain (losses)	(762)	293
Exchanges differences	921	(2,437)
Revaluation gains (losses)	921	(2,437)
Cash flow hedges (Effective portion)	127	(138)
Revaluation gains (losses)	260	(644)
Amounts transferred to income statement	(133)	506
Debt instruments at fair value with changes in other comprehensive income	1,891	(549)
Revaluation gains (losses)	2,131	(269)
Amounts transferred to income statement	(240)	(280)
Share of other recognized income and expense of investments	26	(85)
Income tax relating to items that may be reclassified to profit or loss	(636)	378
Total recognized income and expenses	4,941	2,521
Comprehensive income, attributable to non-controlling interests	994	587
Comprehensive income, attributable to the parent	€ 3,947	€ 1,934

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
Adjustments due to changes in accounting policies						€ 112				€ (291)	€ 241	€ (1,533)	€ (1,471)
Opening balance	€ 8,068	€ 51,053	€ 525	€ 216	€ 53,437	(1,490)	€ (22)	€ 6,619	€ (2,029)	(22,067)	(1,195)	12,247	105,362
Equity at beginning 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
Total recognized income and expense								3,752		(1,818)	(182)	769	2,521
Other changes in equity			17	(1)	3,530	(62)	(39)	(6,619)	980			(1,244)	(3,438)
Dividends					(968)				(1,049)			(418)	(2,435)
Purchase of equity instruments							(624)						(624)
Disposal of equity instruments						1	585						586
Transfers between equity items					4,498	92		(6,619)	2,029
Increases or ( ) decreases due to business combinations												(822)	(822)
Share-based payment				(69)								17	(52)
Other increases or ( ) decreases of the equity			17	68		(155)						(21)	(91)
Equity at end of period at Jun. 30, 2018	8,068	51,053	542	215	56,967	(1,552)	(61)	3,752	(1,049)	(23,885)	(1,377)	11,772	104,445
Adjustments due to changes in accounting policies						(391)							(391)
Opening balance	8,118	50,993	565	234	56,756	(3,958)	(59)	7,810	(2,237)	(22,141)	(1,292)	12,181	106,970
Equity at beginning 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
Total recognized income and expense								3,231		716	143	851	4,941
Other changes in equity			16	(79)	4,293	(103)	47	(7,810)	2,237			(527)	(1,926)
Dividends					(1,055)							(592)	(1,647)
Purchase of equity instruments							(522)						(522)
Disposal of equity instruments						(6)	569						563
Transfers between equity items					5,348	225		(7,810)	€ 2,237
Increases or ( ) decreases due to business combinations												81	81
Share-based payment				(77)									(77)
Other increases or ( ) decreases of the equity			16	(2)		(322)						(16)	(324)
Equity at end of period at Jun. 30, 2019	€ 8,118	€ 50,993	€ 581	€ 155	€ 61,049	€ (4,061)	€ (12)	€ 3,231		€ (21,425)	€ (1,149)	€ 12,505	€ 109,985

Statements of Cash Flows

Statements of Cash Flows - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Statement of cash flows [abstract]
CASH FLOWS FROM OPERATING ACTIVITIES	€ (1,700)	€ (7,132)
CONSOLIDATED PROFIT FOR THE YEAR	4,082	4,521
Adjustments made to obtain the cash flows from operating activities	12,166	11,360
Depreciation and amortization	1,477	1,217
Other adjustments	10,689	10,143
Net increase/(decrease) in operating assets	51,210	30,839
Increase/(decrease) in financial assets held for trading	9,023	(11,425)
Increase/(decrease) in non-trading financial assets mandatorily at fair value through profit or loss	(5,551)	658
Increase/(decrease) in financial assets at fair value through profit or loss	15,595	7,655
Increase/(decrease) in financial assets at fair value through other comprehensive income	(6,895)	(2,306)
Increase/(decrease) in financial assets at amortised cost	36,158	33,482
Increase/(decrease) in other operating assets	2,880	2,775
Net increase/(decrease) in operating liabilities	34,238	8,983
Increase/(decrease) in financial liabilities held for trading	3,370	(31,499)
Increase/(decrease) in financial liabilities designated at fair value through profit or loss	(9,604)	(1,621)
Increase (decrease) in financial liabilities at amortized cost	44,787	45,219
Increase/(decrease) in other operating liabilities	(4,315)	(3,116)
Income tax recovered/(paid)	(976)	(1,157)
CASH FLOWS FROM INVESTING ACTIVITIES	(1,647)	6,490
Payments for investing	4,617	5,550
Payments for tangible assets	4,053	4,926
Payments for intangible assets	499	624
Payments for investments	7
Payments for subsidiaries and other business units	58
Proceeds from investing	2,970	12,040
Proceeds from tangible assets	929	2,459
Proceeds from investments	363	548
Proceeds from subsidiaries and other business units	85	431
Proceeds from non-current assets held for sale and associated liabilities	1,593	8,602
CASH FLOWS FROM FINANCING ACTIVITIES	(6,299)	(811)
Payments for financing	7,915	4,385
Payments for dividends	2,110	1,936
Payments of subordinated liabilities	4,137	1,341
Payments for acquisition of own equity instruments	522	624
Other payments related to financing activities	1,146	484
Proceeds from financing	1,616	3,574
Proceeds from subordinated liabilities	1,056	2,987
Proceeds from disposal of own equity instruments	560	587
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	87	(1,855)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(9,559)	(3,308)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	113,663	110,995
CASH AND CASH EQUIVALENTS AT END OF PERIOD	€ 104,104	€ 107,687

Statements of Cash Flows (Paren

Statements of Cash Flows (Parenthetical) - EUR (€) € in Millions	Jun. 30, 2019	Jun. 30, 2018
Memorandum Items [Abstract]
Cash	€ 7,606	€ 6,540
Cash equivalents at central banks	80,471	84,721
Other financial assets	16,027	16,426
Total cash and cash equivalents	€ 104,104	€ 107,687

Introduction, basis of presenta

Introduction, basis of presentation of the Consolidated Financial Statements and other information	6 Months Ended
	Jun. 30, 2019
Intro, basis of presentation of the consolidated financial statements and other information
Introduction, basis of presentation of the consolidated financial statements and other information	1. Introduction, basis of presentation of the interim condensed consolidated financial statements and other information a) Introduction Banco Santander, S.A. (“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 of 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 (“Group” or “Santander Group”). b) Basis of presentation of the interim financial statements 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 annual accounts for the years beginning on or after January 1, 2005 in accordance with the International Financial Reporting Standards (“IFRSs”) as previously adopted by the European Union (“EU-IFRSs”). In order to adapt the accounting system of Spanish credit institutions to these standards, the Bank of Spain issued Circular 4/2004, of December 22, on Public and Confidential Financial Reporting Rules and Formats, which was repealed on January 1, 2018 by Bank of Spain Circular 4/2017, of November 27, 2017, and subsequent modifications. The consolidated annual accounts for 2018 were approved at the board of directors meeting on February 26, 2019 in compliance with International Financial Reporting Standards as adopted by the European Union, taking into account Bank of Spain Circular 4/2017, and subsequent modifications, using the basis of consolidation, accounting policies and measurement bases described in Note 2 to the aforementioned consolidated annual accounts and, accordingly, they presented fairly the Group’s consolidated equity and consolidated financial position at December 31, 2018 and the consolidated results of its operations, and the consolidated cash flows in 2018. The aforementioned consolidated annual accounts, which are included in the Group’s Form 20-F filed with the U.S. Securities and Exchange Commission on March 26, 2019, and these interim financial statements are also in compliance with International Financial Reporting Standards as issued by the International Accounting Standards Board (“IFRS-IASB”, and together with EU-IFRS, “IFRS”). These interim financial statements were prepared and are presented in accordance with International Accounting Standard (“IAS”) 34, Interim Financial Reporting, for the preparation of interim condensed financial statements, in conformity with Article 12 of Royal Decree 1362/2007, and taking into account the requirements of Circular 3/2018, of June 28, of the Spanish National Securities Market Commission (“CNMV”). The aforementioned interim financial statements were included in the half-year financial report for the first semester of 2019 to be presented by the Group in accordance with the Circular 3/2018. In accordance with IAS34, the interim financial statements are intended only to provide an update on the content of the latest consolidated annual accounts authorised for issue, focusing on new activities, events and circumstances occurring during the six-month period, and does not duplicate information previously reported in the latest consolidated annual accounts. Consequently, these interim financial statements do not include all the information that would be required for a complete set of consolidated annual accounts prepared in accordance with IFRSs and, accordingly, for a proper comprehension of the information included in these interim financial statements, they should be read together with the Group’s consolidated annual accounts for the year ended December 31, 2018. Santander Group policies include presenting the interim financial statements for its use in the different markets using the Euro as its presentation currency. The amounts held in other currencies and the balances of entities whose functional currency is not the Euro, have been translated to the presentation currency in accordance with the criteria indicated in Note 2.a to the consolidated annual accounts for 2018. As indicated in that Note, for practical reasons, the balance sheet amount has been converted to the closing exchange rate, the equity to the historical type, and the income and expenses have been converted by applying the average exchange rate of the period; the application of such exchange rate or that corresponding to the date of each transaction does not lead to significant differences in the interim financial statements of the Group. The accounting policies and methods used in preparing these interim financial statements are the same as those applied in the consolidated annual accounts for 2018, taking into account the standards and interpretations which came into effect for the Group in the six-month period ended June 30, 2019, which are detailed below: - IFRS16 Leases On January 1, 2019, IFRS16 Leases came effective. IFRS16 establishes the principles for the recognition, measurement, presentation and breakdown of lease contracts, with the objective of ensuring reporting information that faithfully represents the lease transactions. The Group has adopted the standard, using the modified retrospective approach from January 1, 2019, not restating the comparative financial statements for 2018, as permitted under the specific transitional provisions of the standard. The adoption of IFRS16 has led to changes in the Group's accounting policies for the recognition, measurement, presentation and breakdown of lease contracts. The main aspects contained in the new regulations and the breakdowns relating to the impact of the adoption of IFRS16 in the Group are included below: a) Lease accounting policy Since January 1, 2019, leases are recognised as right-of-use assets and the corresponding liability on the date on which the leased asset is available for use by the Group. Each lease payment is allocated between the liability and the finance charge. The finance charge is allocated to the income statement during the term of the lease in such a way as to produce a constant periodic interest rate on the remaining balance of the liability for each year. The right-of-use asset is depreciated over the useful life of the asset or the lease term, whichever is shorter, on a straight-line basis. Assets and liabilities arising from a lease are initially measured at present value. Lease liabilities include the net present value of the following lease payments: · Fixed payments (including essentially fixed payments), less any lease incentive receivable, · Variable lease payments that depend on an index or rate, · The amounts expected to be paid by the lessee under residual value guarantees, · The exercise price of a purchase option if the lessee is reasonably certain that it will exercise that option, and · Lease termination penalty payments, if the term of the lease reflects the lessee's exercise of that option. Lease payments are discounted using the interest rate implicit in the lease. Given in certain situations this interest rate cannot be obtained, the discount rate used is the lessee's incremental borrowing rate at the related date. For this purpose, the entity has calculated this incremental interest rate taking as reference the listed debt instruments issued by the Group; in this regard, the Group has estimated different interest rate curves depending on the currency and economic environment in which the contracts are located. In order to construct the incremental interest rate, a methodology has been developed at the corporate level. This methodology is based on the need for each entity to consider its economic and financial situation, for which the following factors must be considered: · Economic and political situation (country risk). · Credit risk of the company. · Monetary policy. · Volume and seniority of the company’s debt instrument issues. The incremental interest rate is defined as the interest rate that a lessee would have to pay for borrowing, given a similar period to the duration of the lease and with similar security, the funds necessary to obtain an asset of similar value to the asset by right of use in a similar economic environment. The Group Entities have a wide stock and variety of financing instruments issued in different currencies to that of the euro (pound, dollar, etc.) that provide sufficient information to be able to determine an "all in rate" (reference rate plus adjustment for credit spread at different terms and in different currencies). In circumstances, where the leasing company has its own financing, this has been used as the starting point for determining the incremental interest rate. On the other hand, for those Group entities that do not have their own financing, the information from the financing of the consolidated subgroup to which they belong was used as the starting point for estimating the entity's curve, analysing other factors to assess whether it is necessary to make any type of negative or positive adjustment to the initially estimated credit spread. Right-of-use assets are valued at cost which includes the following: · The amount of the initial measurement of the lease liability, · Any lease payment made at or before the start date less any lease incentive received, · Any initial direct costs, and · Restoration costs. Payments associated with short-term leases and leases of low-value assets are recognised on a straight-line basis as an expense in the income statement. Short-term leases are leases with a lease term less than or equal to 12 months. b) Recognised effects on the adoption of the standard With the adoption of IFRS16, the Group recognised lease liabilities in relation to leases previously classified as "operating leases" under the principles of IAS17 Leases in force at December 31, 2018. These liabilities were measured at the present value of the remaining lease payments, discounted using the lessee's incremental borrowing rate at January 1, 2019. At the date of first application, the weighted average discount rate was 4.5%, mainly due to the contribution of rented properties in Spain. For leases previously classified as finance leases, the Group recognised the carrying amount of the lease asset and lease liability immediately before transition as the carrying amount of the right-of-use asset and lease liability on the initial effective date. The measurement principles in IFRS16 apply only after that date. The Group has considered the practical expedients defined in paragraph C10 of the standard in the application of the modified retrospective method. Such application shall be made on a contract-by-contract basis and shall not provide for the application of any of the waivers on a generalised basis. A reconciliation between the operating lease commitments at December 31, 2018 and the lease liability recognised at January 1, 2019 is detailed below: Millions of euros Operating lease commitments at December 31, 2018 8,699 Amount of operating lease commitments discounted by the Group rate 6,550 (+) Liabilities under financial leases at December 31, 2018 96 (-) Short-term leases recognised as expenses on a straight-line basis (20) (-) Low-value leases recognised as expenses on a straight-line basis (2) (-) Contracts revalued as service contracts — (+)/(-) Adjustments resulting from different treatment of extension and termination options 556 (+)/(-) Adjustments related to changes in the index or rate affecting variable payments — Lease liability at January 1, 2019 7,180 As a result of the entry into force of IFRS16, the impact of the first application recorded by the Group corresponds, mainly, to the recognition of assets for right of use for an amount of EUR 6,665 million, financial liabilities for an amount of EUR 7,084 million and an negative impact on the Group's equity of EUR 391 million. The impact of the first application of IFRS16 on the ordinary capital ratio (Common Equity Tier 1 - CET 1) was -20 b.p. - IFRIC23 Uncertainty about the treatment of income tax - applies to the determination of taxable profit or loss, tax bases, unused tax loss carry forwards, unused tax credits and tax rates when there is uncertainty about the treatment of taxes under IAS12. - Amendment to IFRS9 Financial Instruments - allows entities to measure certain financial assets prepayable with a negative offset at amortised cost. These assets, which include some loans and debt securities, would have had to be measured at fair value through profit or loss. In order to apply measurement at amortised cost, the negative offset must be 'reasonable compensation for early termination of the contract' and the asset must be maintained within a 'held-to-collect' business model. - Amendment to IAS28 Investments in associates and joint ventures - the amendments clarify the accounting for long-term interests in an associate or joint venture, which are essentially part of the net investment in the associate or joint venture, but to which equity accounting is not applied. Entities must account for such interest under IFRS9 Financial Instruments before applying the allocation of losses and IAS28 impairment requirements in Investments in associates and joint ventures. - Amendment to IAS19 Employee Benefits – clarifies the accounting of the amendments, reductions and settlements on defined benefit plans. - Amendment to IFRS 2015-2017 introduces minor amendments to IFRS3, IFRS11, IAS12 and IAS23: IFRS3, Business Combinations - clarifies that obtaining control of a business that is a joint venture is a business combination achieved in stages. IFRS11, Joint Arrangements - clarifies that the party that obtains joint control of a business that is a joint venture should not reassess its previous interest in the joint venture. IAS12, Income Taxes - clarifies that the income tax consequences of dividends on financial instruments classified as equity should be recognised according to where the past transactions or events that generated distributable profits were recognised. IAS23, Borrowing Costs - clarifies that if a specific loan remains outstanding after the related qualifying asset is ready for sale or intended use, it becomes part of generic loans. The application of the aforementioned amendments to accounting standards and interpretations did not have any material effects on the Group's interim financial statements. At the date of preparation of these interim financial statements there are no standards pending adoption by the European Union which came into force on January 1, 2019. c) Use of critical estimates The consolidated results and the determination of the consolidated equity are sensitive to the accounting principles and policies, valuation criteria and estimates used by the directors of the Bank in preparing the interim financial statements. The main accounting principles, policies, and valuation criteria are indicated in Note 2 of the consolidated annual accounts of the year 2018, except for those indicated in these interim financial statements due to the rules that have come into effect during the first six months of the year 2019. The interim financial statements contain estimates 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 mainly to the following: 1. The income tax expense, which, in accordance with IAS34, is recognised in interim periods based on the best estimate of the weighted average tax rate expected by the Group for the full financial year; 2. The impairment losses on certain assets – Financial assets at fair value through other comprehensive income, financial assets at amortised cost, non-current assets held for sale, investments in subsidiaries, joint ventures and associates, tangible assets and intangible assets; 3. The assumptions used in the calculation of the post-employment benefit liabilities and commitments and other obligations; 4. The useful life of the tangible and intangible assets; 5. The measurement of goodwill impairment arising on consolidation; 6. The calculation of provisions and the consideration of contingent liabilities; 7. The fair value of certain unquoted assets and liabilities; 8. The recoverability of deferred tax assets. In the six-month period ended June 30, 2019 there were no significant changes in the estimates made at the 2018 year-end other than those indicated in these interim financial statements. d) Contingent assets and liabilities Note 2.o to the Group's consolidated annual accounts for the year ended December 31, 2018 includes information on the contingent assets and liabilities at that date. There were no significant changes in the Group’s contingent assets and liabilities from December 31, 2018 to the date of formal preparation of these interim financial statements. e) Comparative information The information for the year 2018 contained in these interim financial statements is only presented for comparison purposes with the information relating to the six-month period ended June 30, 2019, except for the effect of hyperinflation in Argentina on the six-month period ended June 30, 2018 balances in accordance with current legislation (see Note 1.h of the 2018 consolidated annual accounts). In this respect, the segment information corresponding to the first semester of 2018 is recasted for comparative purposes, in accordance with the new organizational structure of the Group, as required by IFRS8 (Note 12). In order to interpret the changes in the balances with respect to December 31, 2018, it is necessary to take into consideration the exchange rate effect arising from the volume of foreign currency balances held by the Group in view of its geographic diversity (Note 51.b to the consolidated annual accounts for the year ended December 31, 2018) and the impact of the appreciation/depreciation of the various currencies against the euro in the first six months of 2019: Mexican peso (3.08%), US dollar (0.62%), Brazilian real (2.14%), Argentine peso (-10.71%), Pound sterling (-0.23%), Chilean peso (2.68%) and Polish zloty (1.22%); as well as the evolution of the average exchange rates between comparable periods: Mexican peso (6.59%), US dollar (7.10%), Brazilian real (-4.76%), Argentine peso (-44.62%), Pound sterling (0.73%), Chilean peso (-2.94%) and Polish zloty (-1.68%). f) Seasonality of the Group’s transactions The business activities carried on by the Group entities, and their transactions are not cyclical or seasonal in nature. Therefore, no specific disclosures are included in these explanatory notes to the interim financial statements for the six-month period ended June 30, 2019. g) Materiality In determining the note disclosures to be made on the various items in the interim financial statements or other matters, the Group, in accordance with IAS 34, took into account their materiality in relation to the interim financial statements for the six-month period ended June 30, 2019. h) Events after the reporting period. From July 1, 2019 until the approval date of the interim financial statements for the six-month period ended June 30, 2019, no significant events other than those indicated in the interim financial statements have occurred. i) Other information Negotiations for the withdrawal of the United Kingdom from the European Union On June 23, 2016, the UK held a referendum on EU membership in which the majority voted in favour of leaving the EU. There remains a great deal of uncertainty about the UK's exit and its future relationship with the European Union and with regard to the UK's future trading relationship with the rest of the world. On March 29, 2017, pursuant to Article 50(2) of the Treaty on European Union, the Prime Minister of the United Kingdom notified her intention to leave the European Union. The activation of this Article initiated a two-year negotiation period to determine the terms of the United Kingdom's exit from the European Union and the framework for the United Kingdom's future relationship with the European Union. The Prime Minister presented to the Parliament of the United Kingdom an exit agreement that established the basic terms for the United Kingdom departure agreed with the European Union. However, the Prime Minister has not achieved a majority for the approval of the exit agreement in the House of Commons which has led her to agree to an extension of Article 50. As a result, the United Kingdom would formally leave the European Union on October 31, 2019. After the repeated failures of the Prime Minister to approve the exit agreement in the United Kingdom Parliament, on May 24, 2019 she announced that she would resign from her positions both as Prime Minister and as leader of the Conservative party. There is also the possibility that UK's membership in the EU will end without reaching any agreement on the terms of its future relationship. Moreover, at the date of this document, the exit agreement, which provides for a transitional period while the future relationship is being negotiated, has not been ratified by the UK parliament. The outcome of Brexit remains uncertain; however, the UK's exit from the European Union without an agreement remains a possibility and the consensus position is that it would have a negative impact on the UK economy and its growth prospects. While it is difficult to predict the long-term effects of the UK's imminent exit from the European Union, in the short term the situation is one of economic and political uncertainty. Santander UK is subject to significant regulation and supervision by the European Union. Although legislation has already been passed transferring EU standards to UK standards, uncertainty persists as to the legal and regulatory environments in which the Group's subsidiaries will operate in the UK when that country is no longer a member of the European Union, and the framework in which cross-border banking business will take place after Brexit. At the operational level, the Group's UK subsidiaries and other financial institutions may no longer be able to rely on the European cross-border framework for financial services and it is not clear what the alternative regime after Brexit will be. This uncertainty and the measures taken as a result of it, as well as the new or amended rules could have a significant impact on the Group's operations, profitability and business. The aforementioned UK political developments, together with other changes in the structure and policies of government, could lead to greater market volatility and changes in the tax, monetary and regulatory landscape in which the Group operates and could have material adverse effects on its access to capital and liquidity under acceptable conditions and, more generally, on its business, financial position and operating results. The Group's best estimate at the date of preparation of the interim financial statements has considered these circumstances in its assessment of the various affected items in the consolidated annual accounts, mainly in the recoverability of the cash-generating unit that supports Santander UK's goodwill.

Santander Group

Santander Group	6 Months Ended
	Jun. 30, 2019
Disclosure of detailed information about business combination [abstract]
Santander Group	2. Santander Group Appendices I, II and III to the consolidated annual accounts for the year ended December 31, 2018 provide relevant information on the Group companies at that date and on the companies accounted for under the equity method. Also, Note 3 to the aforementioned consolidated annual accounts includes a description of the most significant acquisitions and disposals of companies performed by the Group in 2018, 2017 and 2016. The most significant transactions performed during the first semester of 2019 or pending at June 30, 2019 are as follows: Reorganization of the banking insurance business, asset management and pension plans in Spain On June 24, 2019, Banco Santander, S.A. has reached an agreement with the Allianz Group to terminate the agreement that Banco Popular Español, S.A. (“Banco Popular”) held in Spain with the Allianz Group for the exclusive distribution of certain life insurance products, non-life insurance products, collective investment institutions, and pension plans through the Banco Popular network (the “Termination Agreement”). The Termination Agreement will entail the payment by Santander Group of EUR 936.5 million (including any dividend prior to the closing of the transaction). It is expected that, upon completion of the Termination Agreement and subject to the satisfaction of certain conditions, 51% of life-risk insurance business and 51% of the future Non-life Insurance Business coming from the Banco Popular network and not transferred to Mapfre (by virtue of the agreement indicated below), will be acquired by Aegon. This acquisition will be executed according to Note 3.b.vi disclosure of the 2018 consolidated annual accounts. In addition, by virtue of the agreement reached between Banco Santander and Mapfre dated January 21, 2019, 50.01% of the motor insurance, multi-risk business, multi-risk SMEs and civil liability insurance for enterprises businesses in the entire Banco Santander network in Spain will be, subject to the satisfaction of certain conditions and authorizations, acquired by Mapfre. Offer to acquire shares of Banco Santander Mexico, S.A., Institución de Banca Multiple, Grupo Financiero Santander México On April 12, 2019, Banco Santander, S.A. announced its intention to make an offer to acquire all the shares of Banco Santander Mexico, S.A., Institución de Banca Multiple, Grupo Financiero Santander México ("Santander México") which are not owned by Grupo Santander, representing approximately 25% of the share capital of Santander México. The shareholders accepting the offer will receive 0.337 newly issued shares of Banco Santander, S.A. per share of Santander México and 1.685 American Depositary Shares (ADSs) of Banco Santander, S.A. per ADS of Santander México (the "Exchange Ratio"). If all the shares held by minority shareholders accept the offer, Banco Santander, S.A. would issue approximately 571 million shares, representing 3.5% of the share capital at the date of communication of the offer. On June 17, 2019, the Board of Directors decided to call an Extraordinary Shareholders General Meeting on July 23, 2019 to approve the capital increase for the acquisition of the aforementioned shares; following this approval, the execution and the settlement of the transaction is expected. Agreement with Crédit Agricole S.A. on the depositary and custody business On April 17, 2019, Banco Santander, S.A. announced that it had signed a memorandum of understanding with Crédit Agricole S.A. with the purpose of combining CACEIS and its subsidiaries (the “CACEIS Group”), which is wholly-owned by Crédit Agricole S.A., with Santander Securities Services, S.A.U. and its subsidiaries (the “S3 Group”), which is wholly-owned by Banco Santander, S.A. Under the transaction Santander Group will contribute 100% of the S3 Group’s operations in Spain and 49.99% of its operations in Latin America to CACEIS Group, in exchange for 30.5% of the share capital and voting rights of CACEIS Group. The remaining 69.5% would continue to be held by Crédit Agricole S.A. The Latin American operations of the S3 Group would be jointly controlled by CACEIS Group and the Santander Group. On June 27, 2019 the final agreements were signed following the required prior consultation with the relevant works councils at Credit Agricole, S.A. and the CACEIS Group. The completion of the transaction is expected to take place in throughout the second half of 2019 and is subject to customary closing conditions, including to obtaining the necessary regulatory approvals.

Distribution of the Bank's prof

Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share	6 Months Ended
	Jun. 30, 2019
Shareholder remuneration system and earnings per share
Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share	3. Shareholder remuneration system and earnings per share a) Shareholder remuneration system The cash remuneration paid by the Bank to its shareholders in the first six months of 2019 and 2018 was as follows: 06-30-2019 06-30-2018 % of par Euros per Amount % of par Euros per Amount of euros) Ordinary shares 26.00 % 0.130 2,110 24.00 % 0.120 1,936 Other shares (without vote, redeemable, etc.) — — — — — — Total remuneration paid 26.00 % 0.130 2,110 24.00 % 0.120 1,936 Dividend paid out of profit 13.00 % 0.065 1,055 12.00 % 0.060 968 Dividend paid with a charge to reserves or share premium 13.00 % 0.065 1,055 12.00 % 0.060 968 Dividend in kind — — — — — — Flexible payment — — — — — — b) Earnings per share from continuing and discontinued operations i. Basic earnings per share Basic earnings per share for the period are calculated by dividing the net profit attributable to the Group for the six-month period adjusted by the after-tax amount relating to the remuneration of contingently convertible preference shares recognised in equity by the weighted average number of ordinary shares outstanding during the period, excluding the average number of treasury shares held in the period. Accordingly: 06-30-2019 06-30-2018 Profit attributable to the Parent (millions of euros) 3,231 3,752 Remuneration of contingently convertible preference shares (millions of euros) (298) (266) 2,933 3,486 Of which: Profit or Loss from discontinued operations (non controlling interest net) (millions of euros) — — Profit or Loss from continuing operations (PPC net) (millions of euros) 2,933 3,486 Weighted average number of shares outstanding 16,231,374,256 16,129,055,793 Basic earnings per share (euros) 0.18 0.22 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.18 0.22 ii. Diluted earnings per share Diluted earnings per share for the period are calculated by dividing the net profit attributable to the Group for the six-month period adjusted by the after-tax amount relating to the remuneration of contingently convertible preference shares recognised in equity and of perpetual liabilities contingently amortisable in their case by the weighted average number of ordinary shares outstanding during the period, excluding the average number of treasury shares and adjusted for all the dilutive effects inherent to potential ordinary shares (share options, warrants and convertible debt instruments). Accordingly, diluted earnings per share were determined as follows: 06-30-2019 06-30-2018 Profit attributable to the Parent (millions of euros) 3,231 3,752 Remuneration of contingently convertible preference shares (millions of euros) (298) (266) Dilutive effect of changes in profit for the period arising from potential conversion of ordinary shares — — 2,933 3,486 Of which: Profit or Loss from discontinued operations (non controlling interest net) (millions of euros) — — Profit or Loss from continuing operations (PPC net) (millions of euros) 2,933 3,486 Weighted average number of shares outstanding 16,231,374,256 16,129,055,793 Dilutive effect of options/receipt of shares 41,832,881 45,858,082 Adjusted number of shares 16,273,207,137 16,174,913,875 Diluted earnings per share (euros) 0.18 0.22 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.18 0.22

Remuneration and other benefits

Remuneration and other benefits paid to the Bank's directors and senior managers	6 Months Ended
	Jun. 30, 2019
Related party transactions key personnel
Remuneration and other benefits paid to the Bank's directors and senior managers	4. Remuneration and other benefits paid to the Bank’s directors and senior managers Note 5 to the Group’s consolidated annual accounts for the year ended December 31, 2018 includes the detail of the remuneration and other benefits paid to the Bank’s directors and senior managers in 2018 and 2017. Following is a summary of the most significant data on the remunerations and benefits for the six months ended June 30, 2019 and 2018: Remuneration of members of the board of directors (1) Thousands of euros 06-30-2019 06-30-2018 Members of the board of directors (2) (3): Remuneration concept Fixed salary remuneration of executive directors 3,459 3,759 Variable salary remuneration of executive directors — — Directors fees 579 488 Bylaw-stipulated emoluments (annual emolument) 1,853 1,785 Other (except insurance premiums) (4) 3,354 691 Sub-total 9,245 6,723 Transactions with shares and/or other financial instruments — — 9,245 6,723 (1) The notes to the consolidated annual accounts for 2019 will contain detailed and complete information on the remuneration paid to all the directors, including executive directors. (2) Mr. Rodrigo Echenique Gordillo ceased his executive duties with effective date May 1, 2019, continuing from that date as a non-executive director. (3) Mr. Juan Miguel Villar Mir ceased as member of the board of director on January 1, 2019. (4) It includes the amount related to the post-contractual non-compete agreement pact received by Mr. Rodrigo Echenique Gordillo as a result of having ceased in his executive functions with effective date May 1, 2019. The comparison of the figures of the two semesters is affected by the timing difference (semi-annual or annual) of the concepts included in the category. On June 30, 2019, the remuneration received by the executive directors reflects the transformation into the pension system, which includes the reduction of the amount of the annual contributions to the executive directors' pension system, proportionally increasing the fixed annual salary and without any increase in the total cost to the Bank; and the elimination of the supplementary pension system in the event of death (widowhood and orphanhood) and disability, simultaneously establishing a fixed remuneration complement and improving the life insurance coverage of the executive directors, without any increase in the total cost to the Bank. The section on executive directors' pension funds and plans below reflects this transformation in the provisions and/or contributions to pension funds. Other benefits of members of the board of directors Thousands of euros 06-30-2019 06-30-2018 Members of the board of directors: Other benefits- Advances — — Loans granted 121 84 Pension funds and plans: Endowments and/or contributions (1) 1,001 1,341 Pension funds and plans: Accumulated rights (2) 77,153 75,804 Life insurance premiums 1,069 862 Guarantees provided for directors — — (1) These correspond to the endowments and/or contributions made during the first six months of 2019 and 2018 in respect of retirement pensions and complementary benefits for widowhood, orphanhood and permanent disability. (2) Corresponds to the rights accrued by the directors in matters of pensions. It also includes for informational purposes the rights accumulated by Mr. Rodrigo Echenique Gordillo, although these rights corresponded to Mr. Echenique before his appointment as executive director. Additionally, former members of the board had at June 30, 2019 and June 30, 2018 rights accrued for this concept for 68,201 thousands of euros and 79,465 thousands of euros, respectively. Remuneration of senior management (1)(2) The table below includes the corresponding amounts related to remunerations of senior management at June 30, 2019 and 2018, excluding the executive directors: Thousands of euros 06-30-2019 06-30-2018 Senior management (1): Total remuneration of senior management (2) 17,690 16,972 (1) Remunerations regarding to members of senior management who, during the six month period ended June 30, 2019, had ceased their duties amount to EUR 96 thousands (June 30, 2018: EUR 10 thousands). (2) The number of senior managers of the Bank, excluding executive directors, is 18 as at June 30, 2019. (No changes regarding the figure published at June 30, 2018). The remuneration received by senior management at June 30, 2019 reflects the improvement in senior management life insurance coverage following the transformation of the pension system at the beginning of 2018. This transformation did not entail any increase in the total cost for the Bank. The variable annual remuneration (or bonuses) received for fiscal year 2018, both for directors and the rest of senior management, were included in the information on remuneration included in the annual report for that year. Similarly, the variable remuneration attributable to the 2019 results, which will be submitted for approval by the Board of Directors at the appropriate time, will be included in the financial statements for the current year. Funds and pension plans of senior management Thousands of euros 06-30-2019 06-30-2018 Senior management: Pension funds: Endowments and / or contributions (1) 3,190 2,739 Pension funds: Accumulated rights (2) 71,237 62,872 (1) Corresponds to the allocations and/or contributions made during the first six months of 2019 and 2018 as retirement pensions. (2) Corresponds to the rights accrued by members of senior management in the area of pensions. In addition, former members of senior management had at June 30, 2019 and June 30, 2018 rights accumulated for this same concept for EUR 166,960 thousands and EUR 173,819 thousands, respectively.

Financial assets

Financial assets	6 Months Ended
	Jun. 30, 2019
Disclosure of financial assets [abstract]
Disclosure of financial assets [text block]	5. Financial assets a) Breakdown The detail, by nature and category for measurement purposes, of the Group's financial assets, other than the balances relating to Cash, cash balances at central banks and other deposits on demand and Hedging derivatives, at June 30, 2019 and December 31, 2018 is as follows, presented by the nature and categories for valuation purposes: Millions of euros 06-30-2019 Financial held trading Non-trading Financial Financial Financial Derivatives 57,798 — — — — Equity instruments 11,133 3,367 — 2,789 — Debt instruments 33,343 1,628 3,496 111,891 39,382 Loans and advances 300 398 69,924 3,382 941,664 Central Banks — — 7,105 — 19,450 Credit institutions — — 39,810 — 41,068 Customers 300 398 23,009 3,382 881,146 Total 102,574 5,393 73,420 118,062 981,046 Millions of euros 12-31-2018 Financial Non-trading Financial Financial Financial Derivatives 55,939 — — — — Equity instruments 8,938 3,260 — 2,671 — Debt instruments 27,800 5,587 3,222 116,819 37,696 Loans and advances 202 1,883 54,238 1,601 908,403 Central Banks — — 9,226 — 15,601 Credit institutions — 2 23,097 — 35,480 Customers 202 1,881 21,915 1,601 857,322 Total 92,879 10,730 57,460 121,091 946,099 Following is the gross exposure of financial assets subject to impairment stages at June 30, 2019 and December 31, 2018: Millions of euros 06-30-2019 12-31-2018 Impairment value correction Impairment value correction Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Financial assets at fair value through other comprehensive income 115,278 6 — 115,284 118,422 6 — 118,428 Debt instruments 111,899 — — 111,899 116,825 — — 116,825 Loans and advances 3,379 6 — 3,385 1,597 6 — 1,603 Central Banks — — — — — — — — Credit institutions — — — — — — — — Customers 3,379 6 — 3,385 1,597 6 — 1,603 Financial assets at amortised cost 919,584 51,025 33,146 1,003,755 882,661 52,295 34,333 969,289 Debt instruments 39,129 114 736 39,979 37,339 117 870 38,326 Loans and advances 880,455 50,911 32,410 963,776 845,322 52,178 33,463 930,963 Central Banks 19,450 — — 19,450 15,601 — — 15,601 Credit institutions 41,081 — 1 41,082 35,489 1 2 35,492 Customers 819,924 50,911 32,409 903,244 794,232 52,177 33,461 879,870 Total 33,146 34,333 On June 30, 2019, the Group has EUR 623 million (EUR 757 million on December 31, 2018) of exposure in impaired assets purchased with impairment, which mainly correspond to the business combinations carried out by the Group. b) Valuation adjustments for impairment of financial assets at amortised cost portfolio The following is the movement that has taken place, during the six-month periods ended June 30, 2019 and 2018, in the balance of provisions that cover losses due to impairment of assets which comprise the heading balance of the financial assets at amortised cost: Millions of euros 06-30-2019 06-30-2018 (*) Balance as at beginning of period 23,945 26,656 Impairment losses charged to income for the period 5,199 5,174 Of which: Impairment losses charged to income 9,697 9,042 Impairment losses reversed with a credit to income (4,498) (3,868) Write-off of impaired balances against recorded impairment allowance (6,246) (6,140) Exchange differences and other 434 (749) Balance as at end of period 23,332 24,941 Of which, relating to: Impaired assets 15,110 16,131 Other assets 8,222 8,810 Of which: Individually calculated 4,983 6,146 Collectively calculated 18,349 18,795 (*) See reconciliation of IAS 39 December 31, 2017 to IFRS 9 January 1, 2018 (Note 1.b of the 2018 Consolidated Annual Accounts). 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" as at June 30, 2019: Millions of euros Stage 1 Stage 2 Stage 3 Total Loss allowance as at beginning of period 3,658 4,743 14,906 23,307 Transfers between stages (442) (246) 3,160 2,472 Net exposure changes and modifications in the credit risk 673 (336) 2,419 2,756 Write-offs — — (6,246) (6,246) Exchange differences and other (54) 198 290 434 Carrying amount as of June 30, 2019 3,835 4,359 14,529 22,723 Previously written-off assets recovered during the first six months of 2019 and 2018 amount to EUR 837 million and to EUR 823 million, respectively. Considering these amounts, the recorded impairment of financial assets at amortised cost is EUR 4,362 million and EUR 4,351 million, respectively. c) Impaired assets of financial assets at amortised cost portfolio The movement produced, during the six-month periods ended June 30, 2019 and 2018, in the balance of financial assets classified at amortised cost and considered doubtful by reason for the credit risk is as follows: Millions of euros 06-30-2019 06-30-2018 Balance as at beginning of period 35,091 37,275 Net additions 4,581 5,070 Written-off assets (6,246) (6,140) Exchange differences and other 343 (267) Balance as at end of period 33,769 35,938 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. d) Guarantees received Following is the breakdown of the value of the guarantees received to ensure the collection of the financial assets that comprise the heading of financial assets at amortized cost, distinguishing between real guarantees and other guarantees as of June 30, 2019 and December 31, 2018: Millions of euros 06-30-2019 12-31-2018 Real guarantees value 509,859 460,674 Of which: non-performing risks 12,080 13,566 Other guarantees value 29,298 36,727 Of which: non-performing risks 558 1,131 Total value of the guarantees received 539,157 497,401 e) Fair value of financial assets not measured at fair value Following is a comparison of the carrying amounts of the Group’s financial assets measured at other than fair value and their respective fair values at June 30, 2019 and December 31, 2018: Millions of euros Millions of euros 06-30-2019 12-31-2018 Carrying amount Fair value Carrying amount Fair value Financial assets at amortised cost Financial assets at amortised cost Loans and advances 941,664 952,624 Loans and advances 908,403 914,013 Central banks 19,450 19,450 Central banks 15,601 15,610 Loans and advances to credit institutions 41,068 41,309 Loans and advances to credit institutions 35,480 35,833 Loans and advances to customers 881,146 891,865 Loans and advances to customers 857,322 862,570 Debt instruments 39,382 40,058 Debt instruments 37,696 38,095 ASSETS 981,046 992,682 ASSETS 946,099 952,108 The main valuation methods and inputs used in the estimation of the fair value of the financial assets of the previous table are detailed in Note 51.c of the consolidated annual accounts for the year 2018.

Non-current assets

Non-current assets	6 Months Ended
	Jun. 30, 2019
Non-current assets held for sale
Non-current assets	6. Non-current assets held for sale The detail, by nature, of the Group’s non-current assets held for sale at June 30, 2019 and December 31, 2018 is as follows presented by nature: Millions of euros 06-30-2019 06-30-2018 Tangible assets 4,535 5,424 Of which: Foreclosed assets 4,450 5,334 Of which: Property assets in Spain (*) 3,606 4,488 Other tangible assets held for sale 85 90 Other assets — 2 4,535 5,426 (*) During the first six months of 2019, the sale of foreclosed real estate assets to Cerberus took place, generating EUR 180 million losses. On June 30, 2019, the allowance that covers the value of the foreclosed assets represents the 49% (December 31, 2018: 49%). The charges recorded in the first six months of 2019 and 2018 amounted to EUR 160 million and EUR 159 million, respectively, and the recoveries undergone during those periods amount to EUR 32 million and EUR 13 million, respectively.

Tangible assets

Tangible assets	6 Months Ended
	Jun. 30, 2019
Tangible assets
Tangible assets	7. Tangible assets a) Changes in the period In the first six months of 2019 and 2018, tangible assets were acquired for EUR 4,053 million and EUR 4,926 million, respectively. Also, in the first six months of 2019 and 2018 tangible asset items were disposed of with a carrying amount of EUR 1,004 million and EUR 2,441 million respectively, giving rise to a net gain of EUR 30 million and EUR 18 million, respectively. b) Property, plant and equipment purchase commitments At June 30, 2019 and 2018, the Group did not have any significant commitments to purchase property, plant and equipment items.

Intangible assets - Goodwill

Intangible assets - Goodwill	6 Months Ended
	Jun. 30, 2019
Intangible assets
Intangible assets	8. Intangible assets Goodwill The detail of Intangible Assets - Goodwill at June 30, 2019 and December 31, 2018, based on the cash-generating units giving rise thereto, is as follows: Millions of euros 06-30-2019 12-31-2018 Santander UK 8,288 8,307 Banco Santander (Brasil) 4,554 4,459 Santander Bank Polska 2,431 2,402 Santander Consumer USA 2,115 2,102 Santander Bank, National Association 1,804 1,793 Santander Consumer Germany 1,217 1,217 SAM Investment Holdings Limited 1,173 1,173 Santander Portugal 1,040 1,040 Santander España 1,023 1,023 Banco Santander Chile 644 627 Santander Consumer Nordics 494 502 Grupo Financiero Santander (Mexico) 448 434 Other entities 382 387 Total Goodwill 25,613 25,466 In the first six months of 2019, goodwill increased by EUR 147 million mainly due to exchange differences (Note 11), which pursuant to current regulations, were recognised with a debit to Other accumulated results - items that may be reclassified to profit or loss - Exchange differences in equity through the condensed consolidated statement of recognised income and expense. Note 17 to the consolidated annual accounts for the year ended December 31, 2018 includes detailed information on the procedures followed by the Group to analyse the potential impairment of the goodwill recognised with respect to its recoverable amount and to recognise the related impairment losses, where appropriate. Accordingly, based on the analysis performed of the available information on the performance of the various cash-generating units which might evidence the existence of indicators of impairment, the Group’s directors concluded that in the first six months of 2019 there were no impairment losses which required recognition.

Financial liabilities

Financial liabilities	6 Months Ended
	Jun. 30, 2019
Marketable Debt Securities [Abstract]
Financial liabilities	9. Financial liabilities a) Breakdown The following is a breakdown of the Group's financial liabilities, other than the balances corresponding to the Derivatives - hedge accounting heading, as of June 30, 2019 and December 31, 2018, presented by nature and categories for valuation purposes: Millions of euros 06-30-2019 12-31-2018 Financial Financial Financial Financial Financial Financial Derivatives 58,341 — — 55,341 — — Short Positions 15,846 — — 15,002 — — Deposits — 56,990 937,710 — 65,304 903,101 Central banks — 8,836 71,778 — 14,816 72,523 Credit institutions — 10,305 89,030 — 10,891 89,679 Customer — 37,849 776,902 — 39,597 740,899 Debt instruments — 3,117 251,672 — 2,305 244,314 Other financial liabilities — 130 34,812 — 449 24,215 Total 74,187 60,237 1,224,194 70,343 68,058 1,171,630 b) Information on issues, repurchases or redemptions of debt instruments issued The detail of the balance of debt instruments issued according to their nature is: Millions of euros 06-30-2019 12-31-2018 Bonds and debentures outstanding 202,464 Subordinated 21,277 Promissory notes and other securities 31,048 Total debt instruments issued 254,789 The detail, at June 30, 2019 and 2018, of the outstanding balance of the debt instruments, excluding promissory notes, which at these dates had been issued by the Bank or any other Group entity is disclosed below. Also included is the detail of the changes in this balance in the first six months of 2019 and 2018: Millions of euros 06-30-2019 Opening Perimeter Issues Repurchases or Exchange Closing Bonds and debentures outstanding 195,498 — 32,105 (26,713) 1,574 202,464 Subordinated 23,676 — 1,056 (3,502) 47 21,277 Bonds and debentures outstanding and subordinated liabilities issued 219,174 — 33,161 (30,215) 1,621 223,741 Millions of euros 06-30-2018 Opening Perimeter Issues Repurchases or Exchange Closing Bonds and debentures outstanding 176,719 — 35,957 (29,081) (765) 182,830 Subordinated 21,382 — 2,987 (644) 89 23,814 Bonds and debentures outstanding and subordinated liabilities issued 198,101 — 38,944 (29,725) (676) 206,644 In April 2019, Banco Santander, S.A. announced its decision to carry out the optional early redemption of all outstanding Series II/2014 Non-Step-Up Non-Cumulative Contingent Convertible Perpetual Preferred Tier 1 Securities, with a nominal total value of USD 1,500 million (EUR 1,345 million) which are traded on the Global Exchange Market of the Irish Stock Exchange. In February 2019 the Group announced that it had completed the placement of preferred securities contingently convertible into newly issued ordinary shares of the Bank, excluding preemptive subscription rights and for a nominal value of USD 1,200 million (EUR 1,056 million) (the “Issue” and the “CCPS”). The CCPS were issued at par and its remuneration has been set at 7.50% on an annual basis for the first five years. The payment of the remuneration of the CCPS is subject to certain conditions and to the discretion of the Bank. After that, it will be reviewed every five years by applying a margin of 498.9 basis points on the 5-year Mid-Swap Rate. In March 2018, Banco Santander, S.A. communicated that the placement of preference shares contingently convertible into newly issued ordinary shares of the Bank was carried out, excluding the right of preferential subscription of its shareholders and for a nominal amount of EUR 1,500 million (the "Issuance" and the CCPSs"). The Issuance was made at par and the remuneration of the CCPSs, whose payment is subject to certain conditions and is also discretionary, was fixed at an annual 4.75% for the first seven years, being revised thereafter every five years applying a margin of 409.7 basis points over the 5-year Euro Mid-Swap Rate. c) Other issues guaranteed by the Group At June 30, 2019 and 2018, there were no debt instruments issued by associates or non-Group third parties that had been guaranteed by the Bank or any other Group entity. d) Fair value of financial liabilities not measured at fair value Following is a comparison between the value by which the Group’s financial liabilities are recorded that are measured using criteria other than fair value and their corresponding fair value at June 30, 2019 and December 31, 2018: Millions of euros 06-30-2019 12-31-2018 Carrying amount Fair value Carrying amount Fair value Deposits 937,710 937,371 903,101 902,680 Central banks 71,778 71,362 72,523 72,039 Credit institutions 89,030 89,078 89,679 89,662 Customer 776,902 776,931 740,899 740,979 Debt instruments 251,672 259,005 244,314 247,029 Other financial liabilities 34,812 34,860 24,215 24,197 Liabilities 1,224,194 1,231,236 1,171,630 1,173,906 The main valuation methods and inputs used in the estimation of the fair value of the financial liabilities in the previous table are detailed in Note 51.c of the consolidated annual accounts for 2018, other than those mentioned in these interim financial statements.

Provisions

Provisions	6 Months Ended
	Jun. 30, 2019
Provisions.
Provisions	10. Provisions a) Provisions for Pensions and other post-retirements obligations and Other long term employee benefits The variation experienced by the balance of the Pensions and other post-retirements obligations and other long term employee benefits from December 31, 2018 to June 30, 2019, is mainly due to higher actuarial losses in the semester as a result of changes in actuarial assumptions (Note 11.c), as well as the provision for pre-retirement (under the restructuring plan of Spain, some of its employees have been offered the possibility of availing themselves of a pre-retirement and incentivised retirement plan, providing a provision for an amount of EUR 615 millions). b) Provisions for taxes and other legal contingencies and Other provisions Set forth below is the detail, by type of provision, of the balances at June 30, 2019 and at December 31, 2018 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: Millions of euros 06-30-2019 12-31-2018 Provisions for taxes 831 864 Provisions for employment-related proceedings (Brazil) 845 859 Provisions for other legal proceedings 1,477 1,451 Provision for customer remediation 689 652 Regulatory framework-related provisions 83 105 Provision for restructuring 689 492 Other 1,305 1,226 5,919 5,649 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 the estimated cost of payments to remedy errors relating to the sale of certain products in the UK, the estimated cost of the floor clauses of Banco Santander, S.A. (from the former Banco Popular, S.A.U.), as well as the estimated cost of the claims related to the bonds and funds sales closed in Puerto Rico. 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 for the extraordinary contribution to FSCS (Financial Services Compensation Scheme) and the Bank Levy in the UK, and those relating to Banking Tax in Poland. The provisions for restructuring include only the direct costs arising from restructuring processes carried out by the various Group companies. Qualitative information on the main litigation is provided in Note 10.c. 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 changes in provisions arising from civil contingencies and legal nature are disclosed in this note. Regarding the provisions for labor processes and others of a legal nature, Brazil has charged EUR 85 million and EUR 73 million, respectively, with payments of EUR 134 million and EUR 90 million , respectively. Regarding the provisions arising for customer remediation, EUR 80 million provisions in United Kingdom and EUR 47 million provisions in Puerto Rico for customer compensation have been allocated, partially offset with EUR 78 million provisions in United Kingdom and EUR 21 million provisions in Puerto Rico used, and Banco Popular, S.A.U., which an amount of EUR 40 million has been used in the period from floor clauses. Regarding in provisions constituted by regulatory framework, EUR 48 million in the six-month period in United Kingdom has been used (Bank Levy and FSCS). In addition, EUR 61 million have been charged and paid in the semester in Poland. In addition, in the provisions for restructuring, Spain has set aside EUR 242 million, the United Kingdom EUR 124 million and EUR 22 million in Poland. This increase is partially offset by payments of EUR 92 million in Spain, EUR 30 million both in the United Kingdom and Germany and EUR 13 million in Poland. c) Litigation and other matters i. Tax-related litigation At June 30, 2019 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. of August 2007. 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. In June 2019 this action has been dismissed, and the resolution has been appealed to the higher court. There is a provision recognised for the estimated loss. - In December 2010 the Brazilian tax authorities issued an infringement notice against Santander Seguros S.A. (Brazil), currently Zurich Santander Brasil Seguros e Previdência S.A., as the successor by merger to ABN AMRO Brasil dois Participações S.A., in relation to income tax (IRPJ and CSLL) for 2005, questioning the tax treatment applied to a sale of shares of Real Seguros, S.A. Actually it is appealed before the CARF. As the former parent of Santander Seguros S.A. (Brasil), Banco Santander (Brasil) S.A. is liable in the event of any adverse outcome of this proceeding. No provision was recognised in connection with this proceeding as it is considered to be a contingent liability. - In November 2014 the Brazilian tax authorities issued an infringement notice against Banco Santander (Brasil) S.A. in relation to corporate income tax (IRPJ and CSLL) for 2009 questioning the tax-deductibility of the amortisation of the goodwill of Banco ABN AMRO Real S.A. performed prior to the absorption of this bank by Banco Santander (Brasil) S.A., but accepting the amortisation performed after the merger. Actually it is appealed before the Higher Chamber of CARF. No provision was recognised in connection with this proceeding as it was considered to be a contingent liability. - Banco Santander (Brasil) S.A. has also appealed against infringement notices issued by the tax authorities questioning the tax deductibility of the amortisation of the goodwill arising on the acquisition of Banco Comercial e de Investimento Sudameris S.A from years 2007 to 2012. No provision was recognised in connection with this matter as it was considered to be a contingent liability. - Banco Santander (Brasil) S.A. and other companies of the Group in Brazil are undergoing administrative and judicial procedures against Brazilian tax authorities for not admitting tax compensation with credits derived from other tax concepts, not having registered a provision for such amount since it is considered to be a contingent liability. - Banco Santander (Brasil) S.A. is involved in appeals in relation to infringement notices initiated by tax authorities regarding the offsetting of tax losses in the CSLL (‘Social Contribution on Net Income’) of year 2009. The appeal is pending decision in CARF. A provision was recognised in connection with the amount of the estimated loss. - Legal action brought by Sovereign Bancorp, Inc. (currently Santander Holdings USA, Inc.) claiming its right to take a foreign tax credit for taxes paid outside the United States in fiscal years 2003 to 2005 as well as the related issuance and financing costs. On July 17, 2018, the District Court finally ruled against Santander Holdings USA, Inc. Final resolution is anticipated within the coming months, with no effect on income, as it is fully provisioned. - Banco Santander has appealed before European Courts the Decisions 2011/5/CE of October 28, 2009, and 2011/282/UE of January 12, 2011 of the European Commission, ruling that the deduction regulated pursuant to Article 12.5 of the Corporate Income Tax Law constituted illegal State aid. On November 2018 the General Court confirmed these Decisions but these judgements have been appealed at the Court of justice of the European Union. The Group has not recognised provisions for these suits since they are considered to be a contingent liability. At the date of approval of these interim financial statements certain other less significant tax-related proceedings were also in progress. ii. Non-tax-related proceedings At June 30, 2019, the main non-tax-related proceedings concerning the Group were as follows: - Payment Protection Insurance (PPI): claims associated with the sale by Santander UK plc of payment protection insurance or PPI to its customers. As of June 30, 2019, the remaining provision for PPI redress and related costs amounted to GBP 247.9 million (EUR 277 million). An additional net provision of GBP 70 million (EUR 80 million) in the first semester of 2019 reflecting an increase in claims volumes and additional industry activities taking into account guidance provided by the FCA (Financial Conduct Authority), in advance of the PPI claims deadline on August 29, 2019. This provision represents management’s best estimate of Santander UK plc future liability in respect of mis-selling of PPI policies and is based on recent claims experience and consideration of the FCA guidance. It has been calculated using key assumptions such as the estimated number of customer complaints received, the number of rejected misselling claims that will be in scope for Plevin and Recurring Non Disclosure of Commission redress, and the determination of liability with respect to a specific portfolio of claims. The provision will be subject to continuous review, taking into account the impact of any further claims received and FCA guidance. - Delforca: dispute arising from equity swaps entered into by Gaesco (now Delforca 2008, S.A.) on shares of Inmobiliaria Colonial, S.A. Banco Santander, S.A. is claiming to Delforca a total of EUR 66 million from the liquidation of the swaps. Mobiliaria Monesa, S.A. (Delforca’s parent company) has commenced a civil proceeding against the Bank claiming damages which, as of date have not been determined. The proceeding has been stayed because the jurisdiction of the Court has been challenged. Within insolvency proceedings before the Commercial Court, both Delforca and Mobiliaria Monesa have instigated a claim against the Bank seeking the recovery of EUR 56.8 million that the Bank received from the liquidation of the swap. The Bank has filed a claim against Delforca seeking the Bank's recognition of its right to receive the credit. The Bank has not recognised any provisions in this connection. - Former employees of Banco do Estado de São Paulo S.A., Santander Banespa, Cia. de Arrendamiento Mercantil: a claim was filed in 1998 by the association of retired Banespa employees (AFABESP) requesting the payment of a half-yearly bonus contemplated in the by-laws of Banespa in the event that Banespa obtained a profit and that the distribution of this profit were approved by the Board of Directors. The bonus was not paid in 1994 and 1995 since Banespa had not made a profit during those years. Partial payments were made from 1996 to 2000, as approved by the Board of Directors. The relevant clause was eliminated in 2001. The Regional Labor Court and the High Employment Court ordered Santander Brasil, as successor to Banespa, to pay this half-yearly bonus for the period from 1996 to the present. On March 20, 2019, a decision from the Federal Supreme Court (Supremo Tribunal Federal, or “STF”) rejected the extraordinary appeal filed by Santander Brasil. A rescission action to revert the decision in the main process has been filed by Santander Brasil. The current court decision does not define a specific amount to be paid by the defendants (this would only be determined once a final decision is issued and the enforcement process has begun). - “Planos Económicos”: like the rest of the banking system in Brasil, Santander Brasil has been the target of customer complaints and collective civil suits stemming from legislative changes and its application to bank deposits, fundamentally ('economic plans'). At the end of 2017, there was an agreement between regulatory entities and the Brazilian Federation of Banks (Febraban), already approved by the Supremo Tribunal Federal, with the purpose of closing the lawsuits. Discussions focused on specifying the amount to be paid to each affected client according to the balance in their notebook at the time of the Plan. Finally, the total value of the payments will depend on the number of endorsements they have made and the number of savers who have demonstrated the existence of the account and its balance on the date the indexes were changed. In November 2018, the STF ordered the suspension of all economic plan processes for two years from February 2018.The provisions recorded for the economic plan processes are considered sufficient. - CNMC: after an administrative investigation on several financial entities, including Banco Santander, S.A., in relation to possible collusive practices or price-fixing agreements, as well as exchange of commercially sensitive information in relation to financial derivative instruments used as hedge of interest rate risk for syndicated loans, on February 13, 2018, the Competition Directorate of the Spanish “National Commission for Antitrust and Markets” (CNMC) published its decision, by which it fined the Bank and another three financial institutions with EUR 91 million (EUR 23.9 million for the Bank) for offering interest rate derivatives in breach of Articles 1 of the Spanish Act 15/2007 on Defence of Competition and 101 of the Treaty of Functioning of the European Union. According to the CNMC, there would be evidence that there was coordination between the hedging banks/lenders to coordinate the price of the derivatives and offer clients, in each case, a price different from the “market price”. This decision has been appealed before the Spanish National Court by the Bank, that has already paid the fine. - Floor clauses (“cláusulas suelo”): As a consequence of the acquisition of Banco Popular, S.A.U, the Group has been exposed to a material number of transactions with floor clauses. The so-called "floor clauses" or minimum clauses are those under which the borrower accepts a minimum interest rate to be paid to the lender, regardless of the applicable reference interest rate. Banco Popular Español, S.A.U. included "floor clauses" in certain asset transactions with customers. In relation to this type of clauses, and after several rulings made by the Court of Justice of the European Union and the Spanish Supreme Court, and the extrajudicial process established by the Spanish Royal Decree-Law 1/2017, of January 2, Banco Popular Español, S.A.U. made extraordinary provisions that were updated in order to cover the effect of the potential return of the excess interest charged for the application of the floor clauses between the contract date of the corresponding mortgage loans and May 2013. The Group considered that the maximum risk associated with the floor clauses applied in its contracts with consumers, in the most severe and not probable scenario, would amount to approximately EUR 900 million, as initially measured and without considering the returns performed. For this matter, after the purchase of Banco Popular Español, S.A.U., EUR 396 million provisions have been used by the Group (EUR 238 million in 2017, EUR 119 million in 2018 and EUR 39 million in the first semester of 2019) mainly for refunds as a result of the extrajudicial process mentioned above. As of June 30, 2019, the amount of the Group's provisions in relation to this matter amounts to EUR 85 million. - Banco Popular´s acquisition: considering the declaration setting out the resolution of Banco Popular Español, S.A.U., the redemption and conversion of its capital instruments and the subsequent transfer to Banco Santander, S.A. of the shares resulting from this conversion in exercise of the resolution instrument involving the sale of the institution's business, in the application accordance with the single resolution framework regulation referred to in Note 3 of the 2018 consolidated annual accounts, some investors have filed claims against the EU’s Single Resolution Board decision, the FROB's resolution executed in accordance to the aforementioned decision, and claims have been filed and may be filed in the future against Banco Santander, S.A. or other Santander Group companies deriving from or related to the acquisition of Banco Popular Español, S.A.U.. There are also criminal investigations in progress led by the Spanish National Court in connection with Banco Popular Español, S.A.U., although not with its acquisition. On January 15, 2019, the Spanish National Court, applying article 130.2 of the Spanish Criminal Code, declared the Bank the successor entity to Banco Popular Español, S.A.U. (following the merger of the Bank and Banco Popular Español, S.A.U. on September 28, 2018), and, as a result, determined that the Bank assumed the role of the party being investigated in the criminal proceeding. The decision was appealed and on April 30, 2019, the Spanish National Court ruled in favor of Banco Santander, S.A. declaring that Banco Santander, S.A. cannot inherit Banco Popular's potential criminal liability. This ruling was appealed by some of the accusing parties, the appeal was non-accepted by the Spanish National Court and those accusing parties have appealed the non-acceptance before the Supreme Court. At this time it is not possible to foresee the total number of lawsuits and additional claims that could be put forth by the former shareholders, nor their economic implications (particularly considering that the resolution decision in application of the new laws is unprecedented in Spain or any other Member State of the European Union and that possible future claims might not specify any specific amount, allege new legal interpretations or involve a large number of parties). The estimated cost of the potential compensation to the shareholders of Banco Popular Español, S.A.U. has been accounted for as disclosed in the aforementioned Note 3. - German shares investigation: the Cologne Public Prosecution Office is conducting an investigation against the Bank, and other group entities based in UK - Santander UK plc, Abbey National Treasury Services plc and Cater Allen International Limited -, in relation to a particular type of tax dividend linked transactions known as cum-ex transactions. The Group is cooperating with the German authorities. As the investigations are at preliminary stage, the results and the effects for the Group, which may potentially include the imposition of financial penalties, cannot be anticipated. The Bank has not recognised any provisions in this connection in relation to the potential imposition of financial penalties. - Attorneys General Investigation of auto loan securitisation transactions and fair lending practices: in October 2014, May 2015, July 2015 and February 2017, Santander Consumer USA Inc. (SC) received subpoenas and/or Civil Investigative Demands (CIDs) from the Attorneys General of the U.S. states of California, Illinois, Oregon, New Jersey, Maryland and Washington under the authority of each state's consumer protection statutes. SC was informed that these states serve on behalf of a group of 32 state Attorneys General. The subpoenas contain broad requests for information and the production of documents related to SC’s underwriting, securitization, the recovery efforts servicing and collection of nonprime vehicle loans. SC has responded to these requests within the deadlines specified in the CIDs and has otherwise cooperated with the Attorneys General with respect to this matter. The provisions recorded for this investigation are considered sufficient. - Financial Industry Regulatory Authority (“FINRA”) Puerto Rico Arbitrations: as of June 30, 2019, Santander Securities LLC (SSLLC) had received 670 FINRA arbitration cases related to Puerto Rico bonds and Puerto Rico closed-end funds (CEFs). The statements of claims allege, among other things, fraud, negligence, breach of fiduciary duty, breach of contract of the acquirers, unsuitability, over-concentration of the investments and defect to supervise. There were 433 arbitration cases that remained pending as of June 30, 2019. The provisions recorded for these matters are considered sufficient. As a result of various legal, economic and market factors impacting or that could impact of the value Puerto Rico bonds and CEFs, it is possible that additional arbitration claims and/or increased claim amounts may be asserted against SSLLC in future periods. IRPH Index: a portion of our Spanish mortgage loan portfolio bears interest at a rate indexed to the Índice de Referencia de Préstamos Hipotecarios known as "IRPH," which, at the time the contracts were entered into, served as reference rate for mortgage loan agreements in Spain and was published by the Bank of Spain. Consumers in Spain have brought lawsuits against most of the Spanish banking sector alleging that the use and related disclosures of such rate did not comply with the transparency requirements of European regulation. On December 14, 2017, the Supreme Court of Spain ruled that these clauses were valid, as the IRPH is an official rate and therefore non-subject to transparency requirements. The matter has been referred to the Court of Justice of the European Union through a preliminary ruling procedure. Pending the outcome of this referral, the IRPH remains valid as a result of the decision of the Supreme Court of Spain. In the event the Court of Justice of the European Union questions these clauses, it would need to be determined the effects of the decision which carries the uncertainty as to the interest rate that would apply to the relevant mortgage loans. Additionally, it is unclear whether such a ruling by the Court of Justice of the European Union would have retroactive effect and to what extent. The uncertainty regarding the ruling by the Court of Justice of the European Union as well as the effects of such ruling make estimating the potential exposure difficult. Currently, the balance of the relevant mortgage loans held by us equals approximately EUR 4.3 billion. Although it is considered that the decision of the Supreme Court of Spain is well-founded, an unfavorable decision by the Court of Justice of the European Union could result in the charge of a material provision. Banco Santander has been sued in a legal proceeding in which the plaintiff alleges that a contract was concluded whereby he would be entrusted with the functions of CEO of the Bank. In the complaint, the claimant mainly requests a declaratory ruling that affirms the validity and conclusion of such contract and its enforcement together with the payment of certain amounts. If the main request is not granted, the claimant seeks compensation for a total amount of approximately EUR 112 million or, an alternative relief for other minor amounts. Banco Santander, S.A. will answer to this complaint. CHF Polish Mortgage Loans: On May 14, 2019, the Advocate General of Court of Justice of the European Union (CJEU) issued a non-binding opinion in relation to a lawsuit against an unrelated bank in Poland regarding unfair contractual clauses in consumer agreements, specifically the consequences of potentially unfair contractual clauses in CHF-indexed loan agreements. The Advocate General concluded that if the FX difference clause is deemed to be unfair, the agreement may be converted to an agreement on a PLN loan with an interest rate based on CHF LIBOR or it may be rendered null and void, as decided by the domestic court. In consultation with the Polish Bank Association (ZBP), the defendant bank filed for rehearing, enclosing a written opinion of the ZBP which pointed to a significant risk of the CJEU ruling based on incorrect legal assumptions presented in the opinion of the Advocate General. The decision by the CJEU is pending. The uncertainty regarding the ruling by the Court of Justice of the European Union as well as the effects of such ruling make estimating the potential exposure difficult. An unfavorable decision by the Court of Justice of the European Union could result in the charge of a material provision. As at June 30, 2019, the Group has a portfolio of mortgage loans denominated in, or indexed to, CHF of approximately PLN 10,116 million (EUR 2,380 million). The Bank and the other Group companies are subject to claims and, therefore, are party to certain legal proceedings incidental to the normal course of their business including those in connection with lending activities, relationships with employees and other commercial or tax matters. With the information available to it, the Group considers that, at June 30, 2019, it had reliably estimated the obligations associated with each proceeding and had recognised, where necessary, sufficient provisions to cover reasonably any liabilities that may arise as a result of these tax and legal risks. Subject to the qualifications made, it also believes that any liability arising from such claims and proceedings will not have, overall, a material adverse effect on the Group’s business, financial position or results of operations.

Shareholders' equity

Shareholders' equity	6 Months Ended
	Jun. 30, 2019
Shareholders' equity
Equity	11. Equity In the six-month periods ended June 30, 2019 and 2018 there were no quantitative or qualitative changes in the Group's equity other than those indicated in the condensed consolidated statements of changes in total equity. a) Capital As of June 30, 2019 and December 31, 2018, the Bank's capital stock was represented by 16,236,573,942 shares, with a nominal amount of EUR 8,118 million, in both dates. b) Breakdown of other comprehensive income - Items not reclassified to profit or loss and Items that may be reclassified to profit or loss Millions of euros 06-30-2019 12-31-2018 Other comprehensive income accumulated (21,425) (22,141) Items not reclassified to profit or loss (3,625) (2,936) Actuarial gains or losses on defined benefit pension plans (4,141) (3,609) Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates 1 1 Other valuation adjustments — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income 527 597 Inefficacy 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 (12) 75 Items that may be reclassified to profit or loss (17,800) (19,205) Hedge of net investments in foreign operations (effective portion) (5,074) (4,312) Exchange differences (14,927) (15,730) Hedging derivatives. Cash flow hedges (effective portion) 393 277 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income 2,051 828 Hedging instruments (items not designated) — — Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (243) (268) c) Other comprehensive income - Items not reclassified to profit or loss - Actuarial gains or losses on defined benefit pension plans The changes in the balance of Other comprehensive income - Items not reclassified to profit or loss - Actuarial gains or losses on defined benefit pension plans include the actuarial gains or losses generated in the period and the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset), less the administrative expenses and taxes inherent to the plan, and any change in the effect of the asset ceiling. Its variation is shown in the condensed consolidated statement of Recognised income and expense. During the first six months of 2019 actuarial losses (net of actuarial gains) on defined benefit pension plans amounts to EUR 833 million, which main impact is: - Increase of EUR 314 million in the accumulated actuarial losses corresponding to the Group's businesses in the United Kingdom, mainly due to the variation in the discount rate (decrease from 2.90% to 2.35%). - Increase of EUR 304 million in the accumulated actuarial losses corresponding to the Group's businesses in the Brazil, mainly due to the variation in the discount rate (decrease from 9.11% to 7.72%, for pension plans and from 9.26% to 7.86% for medical plans). - Increase of EUR 161 million in the accumulated actuarial losses corresponding to the Group's businesses in the Spain, mainly due to the variation in the discount rate (decrease from 1.55% to 1.10)%. Likewise, the differences in the cumulative actuarial gains and losses account for an increase of EUR 54 million, as a consequence of the evolution of exchange rates and other effects. d) Other comprehensive income - Items not reclassified to profit or loss – Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income Includes the net amount of unrealised fair value changes in equity instruments at fair value with changes in other comprehensive income. Below is a breakdown of the composition of the balance as of June 30, 2019 under “Other comprehensive income - Items that cannot be reclassified to profit or loss - Changes in the fair value of debt equity measured at fair value with changes in other comprehensive income depending on the geographical origin of the issuer”: Millions of euros 06-30-2019 12-31-2018 Net Net Revaluation Revaluation revaluation Fair Revaluation Revaluation revaluation Fair gains losses gains/(losses) value gains losses gains/(losses) value Equity instruments Domestic Spain 19 (444) (425) 185 20 (216) (196) 417 International Rest of Europe 60 (78) (18) 319 160 (76) 84 652 United States 13 — 13 45 9 — 9 42 Latin America and rest 960 (3) 957 2,240 708 (8) 700 1,560 1,052 (525) 527 2,789 897 (300) 597 2,671 Of which: Listed 961 (15) 946 2,289 818 (18) 800 1,943 Unlisted 91 (510) (419) 500 79 (282) (203) 728 e) Other comprehensive income - Items that may be reclassified to profit or loss – Hedges of net investments in foreign operations (effective portion) and exchange differences Other comprehensive income - Items that may be reclassified to profit or loss - Hedges of net investments in foreign operations (effective portion) includes the net amount of the changes in value of hedging instruments in hedges of net investments in foreign operations, in respect of the portion of these changes considered to be effective hedges. Other comprehensive income - Items that may be reclassified to profit or loss - Exchange differences includes the net amount of exchange differences arising on non-monetary items whose fair value is adjusted against equity and the differences arising on the translation to euros of the balances of the consolidated entities whose functional currency is not the euro. The net variation of both headings recognised during the first semester of 2019, recorded in the statement of income and expenses recognised as a consolidated summary, reflects the effect generated by the appreciation of Brazilian real and the depreciation of the Pound sterling and the US Dollar (Note 1.e). From this variation, a gain of EUR 144 million corresponds to the valuation at the closing exchange rate of goodwill of the semester (Note 8). f) Other comprehensive income – Items that may be reclassified to profit or loss – Includes the net amount of unrealised fair value changes in debt instruments at fair value through other comprehensive income. Below is a breakdown of the composition of the balance as of June 30, 2019 and December 31, 2018 under Other comprehensive income - Items that can be reclassified to profit or loss - Changes in the fair value of debt instruments measured at fair value through other comprehensive income depending on the type of instrument and the geographical origin of the issuer: Millions of euros 06-30-2019 12-31-2018 Net Net revaluation revaluation Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair gains losses (losses) value gains losses (losses) value Debt instruments Government and central banks debt instruments Spain 717 (4) 713 29,002 323 (3) 320 38,550 Rest of Europe 679 (32) 647 20,039 373 (55) 318 17,494 Latin America and rest of the world 715 (42) 673 44,820 448 (117) 331 42,599 Private-sector debt instruments 80 (62) 18 21,412 37 (178) (141) 19,777 2,191 (140) 2,051 115,273 1,181 (353) 828 118,420

Primary and secondary segment r

Primary and secondary segment reporting	6 Months Ended
	Jun. 30, 2019
Primary and secondary segment reporting
Primary and secondary segment reporting	12. Segment information For Group management purposes, the primary level of segmentation, by geographical area, comprised at December 31, 2018, five segments: four operating areas plus 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. As of June 30, 2019 the Group has aligned the information in this note in a manner consistent with the current reporting structure and the way in which Management monitors the Group’s segments and units. 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 main changes, which have been applied to all segment information for all periods included in the interim financial statements, are the following: · Creation of the new geographic segment Europe that includes the existing units under the previous Continental Europe segment (Spain, Portugal, Poland, Santander Consumer Finance) plus the UK (that was previously a segment on its own and is now a unit under the segment Europe). · Creation of the new geographic segment North America that comprises the existing units under the previous US segment plus Mexico. · Creation of the new geographic segment South America that comprises the existing units under the previous Latin America segment except for Mexico. · Creation of a new reporting segment, Santander Global Platform, which includes the global digital services under a single unit: - The fully digital native bank Openbank and Open Digital Services (ODS). - Global Payments Services: payments platform to better serve the customers with value propositions developed globally, including Superdigital, Pago FX and the recently launched global business (Global Merchant Services and Global Trade Services). - Digital Assets: common digital Assets and Centres of Digital Expertise which help the banks of the Group in their digital transformation. Following is the breakdown of revenue that is deemed to be recognised under Dividend income, Commission income, 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, Gain or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss, Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net, Gain or losses from hedge accounting, net, Other operating income and Income from assets under insurance and reinsurance contracts in the accompanying consolidated income statements for the six-month period ended June 30, 2019 and 2018. Also, it is disclosed the reconciliation between the adjusted profit and the statutory profit corresponding to the six month period ended June 30, 2019 and 2018: Millions of euros Revenue from ordinary activities Profit Profit before taxes Segment 06-30-2019 06-30-2018 06-30-2019 06-30-2018 06-30-2019 06-30-2018 Europe 16,190 16,406 2,354 2,422 3,549 3,610 South America 14,420 15,497 1,961 690 3,661 1,265 North America 8,768 7,179 889 1,846 1,594 3,499 Santander Global Platform 61 52 (51) (23) (70) (29) Corporate Centre (101) (178) (1,108) (883) (1,155) (865) Underlying Profit 39,338 38,956 4,045 4,052 7,579 7,480 Adjustments — — (814) (300) (1,048) (581) Statutory Profit 39,338 38,956 3,231 3,752 6,531 6,899 Explanation of adjustments at June 30, 2019: · Gains due to the sale of the equity stake in Prisma, with a net impact of EUR 150 million. · Losses given the sale of properties with a net impact of EUR -180 million. · Restructuring costs in United Kingdom, Poland and Spain with a net impact of EUR-704 million. · Provisions for PPI with a net impact of EUR -80 million. Explanation of adjustments at June 30, 2018: · Restructuring costs: The net impact of EUR -300 million on Profit related 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.

Related parties

Related parties	6 Months Ended
	Jun. 30, 2019
Related parties
Related parties	13. Related parties The parties related to the Group are deemed to include, in addition to its subsidiaries, associates and jointly controlled entities, 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 is a detail of the transactions performed by the Group with its related parties in the first six months of 2019 and 2018, distinguishing between significant shareholders, members of the Bank’s board of directors, the Bank’s executive vice presidents, Group entities 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 recognised: Millions of euros 06-30-2019 Expenses and income Significant Directors and Individuals, Group companies Other related Total Expenses: Finance costs — — 1 — 1 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 13 — 13 — — 14 — 14 Income: Finance income — — 46 — 46 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 490 — 490 — — 536 — 536 Millions of euros 06-30-2019 Other transactions Significant Directors and Individuals, Group companies Other related Total Financing agreements: loans and capital contributions (lender) — — 617 (6) 611 Financing agreements: loans and capital contributions (borrower) — — 289 12 301 Guarantees provided — — (21) — (21) Guarantees received — — — — — Commitments acquired — — 75 (24) 51 Dividends and other distributed profit — 5 — 20 25 Other transactions — — — — — Millions of euros 06-30-2019 Balance closing period Significant Directors and executives Individuals, Group companies or entities Other related parties Total Debt balances: Customers and commercial debtors — — — — — Loans and credits granted — 24 7,688 61 7,773 Other collection rights — — 515 17 532 — 24 8,203 78 8,305 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 35 2,222 77 2,334 Other payment obligations — — 42 — 42 — 35 2,264 77 2,376 Millions of euros 06-30-2018 Expenses and income Significant Directors and Individuals, Group companies Other related Total Expenses: Finance costs — — 1 1 2 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 47 — 47 — — 48 1 49 Income: Finance income — — 33 6 39 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 437 14 451 — — 470 20 490 Millions of euros 06-30-2018 Other transactions Significant Directors and Individuals, Group companies Other related Total Financing agreements: loans and capital contributions (lender) — 1 324 (164) 161 Financing agreements: loans and capital contributions (borrower) — 2 (251) 335 86 Guarantees provided — — — 31 31 Guarantees received — — — — — Commitments acquired — — 75 (2) 73 Dividends and other distributed profit — 4 — 18 22 Other transactions — — 9 220 229

Off-balance-sheet exposures

Off-balance-sheet exposures	6 Months Ended
	Jun. 30, 2019
Off-balance-sheet exposures
Off-balance-sheet exposures	14 Off - balance-sheet exposures The off-balance-sheet exposures related to balances representing loan commitments, financial guarantees and other commitments granted (recoverables and non recoverables). Financial guarantees granted include financial guarantees contracts such as financial bank guarantees, credit derivatives, and risks arising from derivatives granted to third parties; non-financial guarantees include other guarantees and irrevocable documentary credits. Loan and other commitments granted include all off-balance-sheet exposures, which are not classified as guarantees provided, including loans commitment granted. Millions of euros 06-30-19 12-31-18 Loan commitments granted 223,954 218,083 Of which doubtful 339 298 Financial guarantees granted 12,077 11,723 Of which doubtful 161 181 Bank sureties 12,004 11,558 Credit derivatives sold 73 165 Other commitments granted 94,785 74,389 Of which doubtful 889 983 Other granted guarantees 33,447 35,154 Other 61,338 39,235 The breakdown of the off-balance sheet exposure and impairment on June 30, 2019 and December 31, 2018 by impairment stages is EUR 323,500 million and EUR 297,409 million of exposure and EUR 379 million and EUR 382 million of impairment in stage 1, EUR 5,927 million and EUR 5,324 million of exposure and EUR 137 million and EUR 132 million of impairment in stage 2, and EUR 1,389 million and EUR 1,462 million of exposure and EUR 212 million and EUR 265 million of impairment in stage 3, respectively.

Average headcount and number of

Average headcount and number of offices	6 Months Ended
	Jun. 30, 2019
Average headcount and number of offices
Average headcount and number of offices	15. Average headcount and number of offices The average number of employees at the Bank and the Group, by gender, in the six month periods ended June 30, 2019 and 2018 is as follows: Bank Group Average headcount 06-30-2019 06-30-2018 06-30-2019 06-30-2018 Men 16,240 11,585 91,609 91,051 Women 13,739 9,906 110,789 110,833 29,979 21,491 202,398 201,884 The increase in the number of employees of the Bank between both periods is due to the merger processes between the Bank and other subsidiaries (mainly Banco Popular). The number of branches at June 30, 2019 and December 31, 2018 is as follow: Group Number of branches 06-30-2019 12-31-2018 Spain 4,296 4,427 Foreign 8,785 8,790 13,081 13,217

Other disclosures

Other disclosures	6 Months Ended
	Jun. 30, 2019
Other disclosures
Other disclosures	16. Other disclosures a) The following table shows a summary of the fair values, at June 30, 2019 and December 31, 2018, 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: Millions of euros 06-30-19 12-31-18 Published price Published price quotations in active quotations in markets Internal models active markets Internal models (Level 1) (Levels 2 and 3) Total (Level 1) (Levels 2 and 3) Total Financial assets held for trading 44,404 58,170 102,574 37,108 55,771 92,879 Non-trading financial assets mandatorily at fair value through profit or loss 1,695 3,698 5,393 1,835 8,895 10,730 Financial assets at fair value through profit and loss 2,739 70,681 73,420 3,102 54,358 57,460 Financial assets at fair value through other comprehensive income 98,629 19,433 118,062 103,590 17,501 121,091 Hedging derivatives (assets) — 8,451 8,451 — 8,607 8,607 Financial liabilities held for trading 16,861 57,326 74,187 16,104 54,239 70,343 Financial liabilities designated at fair value through profit or loss 1,350 58,887 60,237 987 67,071 68,058 Hedging derivatives (liabilities) 5 7,262 7,267 5 6,358 6,363 Liabilities under insurance contracts — 731 731 — 765 765 Financial instruments at fair value, determined on the basis of published price quotations in active markets (Level 1), include government debt instruments, private-sector debt instruments, 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 some 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. During the first semester of 2019, the Group did not make any material transfers of financial instruments between measurement levels other than the transfers included in level 3 table. At this regard, the Group has proceeded to reclassify to level 3 certain government bonds in Brazil that, based on the Group's observability criteria, do not meet the requirements to be considered as observable inputs. Likewise, certain positions (both derivatives and debt instruments) have been reclassified to level 2 with maturities for which there are already observable valuation inputs or for which new sources of recurrent prices have been accessed. 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 most important products and families of derivatives, and the related valuation techniques and inputs, by asset class, are detailed in the consolidated annual accounts as at December 31, 2018. As of June 30, 2019, the CVA (Credit Valuation Adjustment) accounted for was EUR 302.2 million (-13.9% from December 31, 2018 year end) and adjustments of DVA (Debt Valuation Adjustment) was EUR 192.5 million (-26.2% compared to December 31, 2018). The reductions are mainly due to the decrease of credit spreads by more than 30% in the most liquid periods. Set forth below are the financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3) at June 30, 2019 and December 31, 2018: Millions of euros Millions of euros Fair values calculated using Fair values calculated using internal models at internal models at 06-30-19 (*) 12-31-18 (*) Level 2 Level 3 Level 2 Level 3 Valuation techniques Main inputs ASSETS 153,100 7,333 140,659 4,473 Financial assets held for trading 57,567 603 55,033 738 Customers (**) 300 — 205 — Present value method Yield curves, FX market prices Debt instruments and equity instruments 990 74 314 153 Present value method Yield curves, HPI, FX market prices Derivatives 56,277 529 54,514 585 Swaps 47,337 191 44,423 185 Present value method, Gaussian Copula (***) Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 388 3 617 2 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 3,679 190 3,778 149 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures 11 — — — Present value method Yield curves, FX market prices Index and securities options 1,376 113 1,118 198 Black-Scholes Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 3,486 32 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 8,443 8 8,586 21 Swaps 7,906 — 7,704 21 Present value method FX market prices, Yield curves, Basis Interest rate options 17 8 20 — Black's Model FX market prices, Yield curves, Volatility surfaces Other 520 — 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 1,747 1,951 7,492 1,403 Equity instruments 1,083 612 985 462 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 653 953 5,085 481 Present value method Interest rates curves Loans and receivables (**) 11 386 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 69,664 1,017 53,482 876 Central banks 7,105 — 9,226 — Present value method Interest rates curves, FX market prices Credit institutions 39,760 50 22,897 201 Present value method Interest rates curves, FX market prices Customers (****) 22,599 411 21,355 560 Present value method Interest rates curves, FX market prices, HPI Debt instruments 200 556 4 115 Present value method Interest rates curves, FX market prices Financial assets at fair value through other comprehensive income 15,679 3,754 16,066 1,435 Equity instruments 122 346 455 581 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 15,391 192 14,699 165 Present value method Interest rates curves, FX market prices Loans and receivables 166 3,216 912 689 Present value method Interest rates curves, FX market prices and Credit curves and Liquidity. LIABILITIES 123,600 606 127,991 442 Financial liabilities held for trading 57,069 257 53,950 289 Derivatives 57,024 257 53,950 289 Swaps 47,255 110 43,489 111 Present value method, Gaussian Copula (***) Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 464 — 610 7 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 4,709 32 4,411 26 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Index and securities options 1,365 105 1,233 143 Black-Scholes Model Yield curves, FX market prices Interest rate and equity futures 25 — 7 — Black's Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 3,206 10 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 45 — — — Present value method Yield curves ,FX & EQ market prices, Equity Hedging derivatives 7,260 2 6,352 6 Swaps 6,513 — 5,868 6 Present value method Yield curves ,FX & EQ market prices, Basis Interest rate options 8 2 158 — Black's Model Yield curves , Volatility surfaces, FX market prices, Liquidity Other 739 — 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 58,540 347 66,924 147 Present value method Yield curves, FX market prices Liabilities under insurance contracts 731 — 765 — (*) The internal models of Level 2 implement figures based on the parameters observed in the market, while Level 3 internal models uses significant inputs that are not observable 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 negative net fair value of EUR 2 million recognised in the interim condensed consolidated balance sheet (December 31, 2018: net fair value of EUR 0 million ). These assets and liabilities are measured using the Standard Gaussian Copula Model. (****) Includes residential mortgages to financial institutions in the United Kingdom (which are regulated and partly financed by the Government). The fair value of these loans has been obtained using observable market variables, including current market transactions of similar amount and guarantees provided by the UK Housing Association. Given that the Government is involved in these entities, credit risk spreads have remained stable and homogeneous in this sector. The results arising from the valuation model are contrasted against current market transactions. The measurements obtained using the internal models might have been different had other methods or assumptions been used with respect to interest rate risk, to credit risk, market risk and foreign currency risk spreads, or to their related correlations and volatilities. Nevertheless, the Bank’s directors consider that the fair value of the financial assets and liabilities recognised in the consolidated balance sheet and the gains and losses arising from these financial instruments are reasonable. Level 3 financial instruments Set forth below are the Group's main financial instruments measured using unobservable market data that constitute significant inputs of the internal models (Level 3): - · The 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 more short-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. - - - Derivatives from trading on inflation in Spain, where volatility is not observable in the market. - Derivatives on long-term interest rate volatility (more than 30 years) where volatility is not observable in the market at the indicated term. - Equity volatility derivatives, specifically indices and equities, where volatility is not observable in the long term. - Syndicated loans with the HTC&S business model (Hold to collect and sale) and classified in the fair value category with changes in other accumulated global result, where the cost of liquidity is not directly observable in the market, as well as the prepayment option in favour of the borrower. The net amount recorded in the results of the first six months of 2019 resulting from the aforementioned valuation models which main inputs are unobservable market data (Level 3) amounts to EUR 68 million benefit approximately (EUR 13 million in June 30, 2018). The table below shows the effect, at June 30, 2019, on the fair value of the main financial instruments classified as Level 3 of a reasonable change in the assumptions used in the valuation. This effect was determined by applying the probable valuation ranges of the main unobservable inputs detailed in the following table: Impacts (in millions of euros) Portfolio/Instrument Weighted Unfavorable 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% 2.53% (4.4) 4.3 HPI spot rate n/a 795.75 (**) (9.8) 9.8 Interest curves, Price market FX CPR n/a n/a (163.2) 84.4 Quanto options (c) Local term volatility and reference strike under the partial differential equation method Non-existent market volatility, a proxy is used Beta vs Volatility Surface STOXX50E 69%-62% Beta 65% — — Financial assets at fair value through other comprehensive income Debt instruments and equity holdings Present Value Method, others Contingencies for litigations 0%-100% 22% (27.2) 7.7 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 curves, price market FX and credit curves (a) (a) 1.8 (1.8) Local Volatility Long term volatility n/a 34.0% 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% 2.66% (5.9) 5.2 Debt instruments and equity instruments HPI spot rate n/a 788.41 (**) (10.7) 10.7 TD Black Spain Volatility n/a 4.7% 2.2 (11.5) Asset Swap Model & CDS Interest and credit curve models n/a 7.7% (19.8) 4.4 Cvx. Adj (SLN) Long term volatility n/a 8.0% (121.2) 105.1 Financial liabilities held for trading Trading derivatives Present Value Method, Modified Black-Scholes Model HPI forward growth rate 0%-5% 2.41% (7.8) 7.3 HPI spot rate n/a 776.48 (**) (4.3) 5.0 Curves on TAB indices (*) (a) (a) — — Discounted flows denominated in different currencies Long term rate MXN Bid Offer Spread IRS TIIE 2bp - 6bp X-CCY USD/MXN 3bp - 10bp Swaps UDI/MXN 5bp - 10bp IRS TIIE 3bp X-CCY MXN/USD 4bp Swaps UDI/MXN 10bp (0.481) 0.480 Hedging Derivatives (Liabilities) Advances models of local volatility and stochastic Correlation between prices and shares 55%-75% 65% Not applicable Not applicable Advanced multi-factor interest rate models Reversion to average interest rate 0.0001-0.03 0.01 (***) — — Financial liabilities designated at fair value through profit or loss — — — — (b) (b) (*) TAB: “Tasa Activa Bancaria” (Active Bank Rate). Average deposit interest rates (over 30, 90, 180 and 360 days) published by the Chilean Association of Banks and Financial Institutions (ABIF) in nominal currency (Chilean peso) and in real terms, adjusted for inflation (Unidad de Fomento - UF). (**) There are national and regional HPI indices. The HPI spot value is the weighted average of the indices that correspond to the positions of each portfolio. The impact reported is a change of 10%. (***) Theoretical average value of the parameter. The change arising on a favourable scenario is from 0.0001 to 0.03. An unfavourable scenario is not considered as there is insufficient margin for an adverse change from the current parameter level. (a) The exercise was conducted for the unobservable inputs described in the “main unobservable inputs” column under probable scenarios. The range and weighted average value used are not shown because the aforementioned exercise was conducted jointly for various inputs or variants thereof (e.g. the TAB input comprises vector-time curves, for which there are also nominal yield curves and inflation-indexed yield curves), and it was not possible to break down the results separately by type of input. In the case of the TAB curve the gain or loss is reported for changes of +/-100 b.p. for the total sensitivity to this index in CLP and CLF. The same is applicable to the MXN interest rates. (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. (c) No impacts have arisen in Quanto options as the exposure is back to back completely covered. Lastly, the changes in the financial instruments classified as Level 3 in the first six months of 2019 were as follows: 01-01-19 Changes 06-30-19 Fair value Changes in Changes in Fair value calculated using fair value fair value calculated using internal models Purchases/ Sales/ recognized in recognized Level internal models Millions of euros (Level 3) Issuances Settlements profit or loss in equity reclassifications Other (Level 3) Financial assets held for trading 738 58 (46) 45 — (200) 8 603 Debt instruments 153 13 (24) (2) — (69) 3 74 Trading derivatives 585 45 (22) 47 — (131) 5 529 Swaps 185 1 (8) 15 — (3) 1 191 Exchange rate options 2 — — 1 — — — 3 Interest rate options 149 — — 10 — 31 — 190 Index and securities options 198 33 (11) 21 — (132) 4 113 Other 51 11 (3) — — (27) — 32 Hedging derivatives (Assets) 21 8 — — — (21) — 8 Swaps 21 — — — — (21) — — Interest rate options — 8 — — — — — 8 Trading financial assets at fair value through profit or loss 876 — (1) 1 — 176 (35) 1,017 Credit institutions 201 — — — — (151) - 50 Loans and advances to customers 560 — (1) — — (112) (36) 411 Debt instruments 115 — — 1 — 439 1 556 Non-trading financial assets mandatorily at fair value through profit or loss 1,403 674 (187) 70 — (7) (2) 1,951 Loans and advances to customers 460 67 (176) 19 — — 16 386 Debt instruments 481 493 (2) 3 — (8) (14) 953 Equity instruments 462 114 (9) 48 — 1 (4) 612 Financial assets at fair value through other comprehensive income 1,435 3,268 (502) — (209) (316) 78 3,754 TOTAL ASSETS 4,473 4,008 (736) 116 (209) (368) 49 7,333 Financial liabilities held for trading 289 42 (2) 42 — (120) 6 257 Trading derivatives 289 42 (2) 42 — (120) 6 257 Swaps 111 2 — 4 — (6) (1) 110 Exchange rate options 7 — — — — (7) — — Interest rate options 26 — — 3 — — 3 32 Index and securities options 143 40 (2) 34 — (113) 3 105 Others 2 — — 1 — 6 1 10 Hedging derivatives (Liabilities) 6 2 — — — (6) — 2 Swaps 6 — — — — (6) — — Interest rate options — 2 — — — — — 2 Financial liabilities designated at fair value through profit or loss 147 291 (2) 6 — (93) (2) 347 TOTAL LIABILITIES 442 335 (4) 48 — (219) 4 606 b) Sovereign risk with peripheral European countries The detail at June 30, 2019 and December 31, 2018, by type of financial instrument, of the Group credit institutions’ sovereign risk exposure to Europe’s peripheral countries and of the short positions exposed to them, taking into consideration the scope established by the European Banking Authority (EBA) in the analyses performed on the capital needs of European credit institutions (Note 54 to the consolidated annual accounts for 2018), is as follows: Sovereign risk by country of issuer/borrower at June 30, 2019 (*) Millions 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 Other than or loss positions income profit or loss cost (**) exposure CDSs CDSs Spain 6,084 (1,710) 16,379 — 7,249 13,932 41,934 522 — Portugal 365 (759) 5,633 — 564 3,686 9,489 — — Italy 1,151 (159) 3,188 — 387 62 4,629 3 (3) Ireland — — — — — — — (1) — (*) Information prepared under EBA standards. Also, there are government debt instruments on insurance companies balance sheets amounting to EUR 15,005 million (of which EUR 13,131 million, EUR 1,406 million, EUR 466 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 5,012 million (of which EUR 4,423 million, EUR 297 million and EUR 292 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the valuation adjustments recognised (EUR 22 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, 2018 (*) Millions 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 Other than or loss positions income profit or loss cost (**) exposure CDSs CDSs 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 — (*) 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 different to derivatives –contingent liabilities and commitments– amounting to EUR 5,622 million (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. 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 June 30, 2019 and December 31, 2018 is as follows: Exposure to other counterparties by country of issuer/borrower at June 30, 2019 (*) Millions 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 28,154 7,433 614 1,236 322 4,355 196,633 238,747 3,674 2 Portugal 2,179 205 31 38 — 3,561 33,946 39,960 1,084 — Italy 361 3,618 328 578 — 148 11,016 16,049 740 — Greece — — — — — — 71 71 33 — Ireland — — 30 1,398 — 21 8,564 10,013 245 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 85,514 million, EUR 7,951 million, EUR 3,842 million, EUR 200 million and EUR 801 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented without taking into account valuation adjustments or impairment corrections (EUR 8,304 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, 2018 (*) Millions 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 — (*) 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. (**) They are 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. Following is certain information on the notional amounts of the CDSs detailed in the foregoing tables at June 30, 2019 and December 31, 2018: 06-30-19 Millions of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 216 380 (164) (2) 4 2 Portugal Sovereign 26 26 — — — — Other — — — — — — Italy Sovereign 312 9 303 (3) — (3) Other 60 153 (93) (4) 4 — 12-31-18 Millions 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 — c) Refinancing and restructured transactions The following forms are use with the meanings specified below: · Refinancing transaction: transaction that is granted or used, for reasons relating to current or foreseeable financial difficulties of the borrower, to repay one or more of the transactions granted to it, or through which the payments on such transactions are brought fully or partially up to date, in order to enable the borrowers of the cancelled or refinanced transactions to repay their debt (principal and interest) because they are unable, or might foreseeably become unable, to comply with the conditions thereof in due time and form. · Restructured transaction: transaction with respect to which, for economic or legal reasons relating to current or foreseeable financial difficulties of the borrower, the financial terms and conditions are modified in order to facilitate the payment of the debt (principal and interest) because the borrower is unable, or might foreseeably become unable, to comply with the aforementioned terms and conditions in due time and form, even if such modification is envisaged in the agreement. For maximum guarantees amount, we will consider as follows: · Real guarantees: the appraisal amount or valuation amount of the real guarantees received; for each transaction it cannot be higher than the covered amount of exposure. · Personal guarantees, maximum amount guarantors will have to pay if the guarantee is implemented. 06-30-2019 Total Of which: Non performing/Doubtful Without collateral With collateral Without collateral (a) With collateral Maximum amount of Accumulated Maximum amount of Accumulated collateral that can be Impairment collateral that can be Impairment Amounts in millions of euros, considered or losses at considered or losses at except number of transactions Number of Gross Number of Gross Mortgage Other fair value due Number of Gross Number of Gross Mortgage Other fair value due in units transactions amount operations amount guarantee guarantees to credit risk transactions amount transactions amount guarantee guarantees to credit risk Credit entities — — — — — — — — — — — — — — Public sector 36 34 16 10 8 — 2 11 3 10 4 3 — 1 Other financial institutions and: individual shareholder) 585 58 268 102 15 28 28 290 26 126 18 10 1 20 Non financial institutions and individual shareholder 145,564 5,916 45,194 12,919 8,398 1,272 5,825 89,277 3,927 30,229 7,793 5,143 622 5,408 Of which: Financing for constructions and property development 5,963 252 1,909 1,653 1,363 46 594 4,246 200 1,400 1,146 877 44 576 Other warehouses 1,640,494 3,627 724,916 12,743 7,528 2,382 4,267 922,436 1,792 145,102 4,546 3,310 367 2,835 Total 1,786,679 9,635 770,394 25,774 15,949 3,682 10,122 1,012,014 5,748 175,467 12,361 8,466 990 8,264 Financing classified as non-current assets — — — — — — — — — — — — — — The table below shows the changes of these balances during the first semester of 2019: Millions of euros Carrying amount 06-30-2019 Beginning balances 30,527 Refinancing and restructuring of the period 2,828 Memorandum items: impact recorded in the income statement for the period 1,177 Debt repayment (3,880) Foreclosures (249) Derecognised from the consolidated balance sheet (892) Other variations (3,047) Balances at end of year 25,287 d) Real estate business – Spain i) Portfolio of home purchase loans to families Home purchase loans granted to families in Spain on June 30, 2019 amounted to EUR 63,102 million. Of which mortgage guarantees are 99.41%. 06-30-19 Millions of euros Gross Of which: Amount Non-performing Home purchase loans to families - Without mortgage guarantee 374 26 - With mortgage guarantee 62,728 2,477 63,102 2,503 The risk profile of the home purchase mortgage loan portfolio in Spain remained at a medium-low level, with limited prospects of additional impairment: · Principal is repaid on all mortgages from the start. · Early repayment is common so the average life of the transaction is well below that of the contract. · High quality of collateral concentrated almost exclusively in financing the first home. · Average affordability rate at the end of June stood at 28.35%. · 84.96% of the portfolio has a LTV below 80%, calculated as total risk/latest available house appraisal. 06-30-19 Gross amount in books on the amount of the last appraisal (loan to value) More than More than More than 40% or 60% and 80% and Less than or less than less than less or More than In millions of euros equal to 40% 60% 80% equal to 100% 100% TOTAL Gross amount 16,299 18,919 18,078 5,558 3,874 62,728 - Of which: watchlist /non performing 220 306 454 433 1,064 2,477 ii) At June 30, 2019 the financing amount related to construction and real estate business in Spain amounted to EUR 3,752 million net of allowances. 06-30-2019 Excess over collateral Specific Millions of euros Gross Amount value allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 4,131 656 379 Of which: watchl

Additional disclosures

Additional disclosures	6 Months Ended
	Jun. 30, 2019
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Additional Disclosures	17. Additional disclosure requirements This Note includes relevant information about additional disclosure requirements. 17.1 Following are the summarized balance sheets of Banco Santander, S.A. as of June 30, 2019 and December 31, 2018. In the financial information of the Parent, investments in subsidiaries, jointly controlled entities and associates are recorded at cost. UNAUDITED CONDENSED BALANCE SHEETS June 30, 2019 December 31, 2018 (Parent company only) (Millions of Euros) Assets Cash and due from banks 107,566 105,660 Of which: To bank subsidiaries 15,732 16,339 Trading account assets 81,249 70,825 Investment securities 47,575 61,064 Of which: To bank subsidiaries 8,744 11,084 To non-bank subsidiaries 4,306 4,581 Net Loans and leases 276,396 263,142 Of which: To non-bank subsidiaries 29,637 26,505 Investment in affiliated companies 82,596 81,734 Of which: To bank subsidiaries 63,480 69,118 To non-bank subsidiaries 19,116 12,616 Premises and equipment, net 6,389 2,410 Other assets 24,211 23,541 Total assets 625,982 608,376 Liabilities Deposits 364,457 350,786 Of which: To bank subsidiaries 18,668 18,526 To non-bank subsidiaries 16,790 13,655 Short-term debt 36,163 30,883 Long-term debt 68,083 75,600 Total debt 104,246 106,483 Of which: To bank subsidiaries 501 2,874 To non-bank subsidiaries 2,740 998 Other liabilities 89,705 82,340 Total liabilities 558,408 539,609 Stockholders' equity Capital stock 8,118 8,118 Retained earnings and other reserves 59,456 60,649 Total stockholders' equity 67,574 68,767 Total liabilities and Stockholders’ Equity 625,982 608,376 Following are the summarized unaudited statements of income of Banco Santander, S.A. for the periods ended June 30, 2019 and 2018. UNAUDITED CONDENSED STATEMENTS OF INCOME Six months ended Six months ended (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) Interest income Interest from earning assets 4,148 2,836 Dividends from affiliated companies 1,735 1,447 Of which: From bank subsidiaries 1,355 957 From non-bank subsidiaries 381 490 5,883 4,283 Interest expense (2,113) (1,586) Interest income / (Charges) 3,770 2,697 Provision for credit losses (544) (209) Interest income / (Charges) after provision for credit losses 3,226 2,488 Non-interest income: 1,805 1,708 Non-interest expense: (4,633) (2,937) Income before income taxes 398 1,259 Income tax expense 145 36 Net income 543 1,295 Following are the summarized unaudited statements of comprehensive income of Banco Santander, S.A. for the periods ended June 30, 2019 and 2018. UNAUDITED CONDENSED STATEMENTS OF Six months ended Six months ended COMPREHENSIVE INCOME (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) NET INCOME 543 1,295 OTHER COMPREHENSIVE INCOME 15 17 Items that may be reclassified subsequently to profit or loss 179 60 Available-for-sale financial assets: 464 59 Revaluation gains/(losses) 622 188 Amounts transferred to income statement (158) (129) Other reclassifications — — Cash flow hedges: (207) 27 Revaluation gains/(losses) (204) 34 Amounts transferred to income statement (3) (7) 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 (78) (26) Items that will not be reclassified to profit or loss: (164) (43) Actuarial gains/(losses) on pension plans (98) 81 Rest of valuation adjustments (53) (98) Income tax (13) (27) TOTAL COMPREHENSIVE INCOME 558 1,312 Following are the summarized unaudited cash flow statements of Banco Santander, S.A. for the periods ended June 30, 2019 and 2018. UNAUDITED CONDENSED CASH FLOW STATEMENTS Six months ended Six months ended (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 543 1,295 Adjustments to profit 1,237 442 Net increase/decrease in operating assets (27,955) (12,498) Net increase/decrease in operating liabilities 16,568 17,519 Reimbursements/payments of income tax 882 555 Total net cash flows from operating activities (1) (8,725) 7,313 2. Cash flows from investing activities Investments (-) (368) (336) Divestments (+) 1,042 586 Total net cash flows from investment activities (2) 674 250 3. Cash flows from financing activities Issuance of own equity instruments - - Disposal of own equity instruments 452 438 Acquisition of own equity instruments (452) (438) Issuance of debt securities 1,056 2,750 Redemption of debt securities (3,471) (763) Dividends paid (2,111) (1,936) Issuance/Redemption of equity instruments - - Other collections/payments related to financing activities (219) - Total net cash flows from financing activities (3) (4,745) 51 4. Effect of exchange rate changes on cash and cash equivalents (4) 38 148 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) (12,758) 7,762 Cash and cash equivalents at beginning of period 51,931 33,734 Cash and cash equivalents at end of period 39,173 41,496 17.2 The following table shows the balance of the preference shares and preferred securities as of June 30, 2019 and December 31, 2018: June 30, 2019 December 31, 2018 (Millions of Euros) Preference shares 308 345 Preferred securities 7,988 9,717 Total at period-end 8,296 10,063 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 June 30, 2019 and December 31, 2018. 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. to our consolidated financial statements in our 2018 Form 20-F and Note 9.b. to our consolidated financial statements in Part 2 of this report. Outstanding at June 30, 2019 Amount in Preference Shares currency Interest rate Redemption Issuer/Date of issue Currency (million) Option (A) Santander UK plc, October 1995 Pounds Sterling 10.375% No option Santander UK plc, February 1996 Pounds Sterling 10.375% No option Santander UK plc, May 2006 Pounds Sterling 13.8 6.222% (B) May 24, 2019 Santander Bank, National Association, August 2000 US Dollar 153.0 12.00% May 16, 2020 Outstanding at June 30, 2019 Amount in Preferred Securities currency Interest rate Maturity date Issuer/Date of issue Currency (million) 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 Perpetuity Banco Santander, S.A., March 2014 Euro 1,500.0 (C) Perpetuity Banco Santander, S.A., September 2014 Euro 1,500.0 (D) Perpetuity Banco Santander, S.A., April 2017 Euro 750.0 (E) Perpetuity Banco Santander, S.A., September 2017 Euro 1,000.0 (F) Perpetuity Banco Santander, S.A., March 2018 Euro 1,500.0 (G) Perpetuity Banco Santander, S.A., February 2019 US Dollar 1,200.0 (H) 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 Perpetuity Santander Finance Preferred, S.A. (Unipersonal), March 2007 (H) US Dollar 210.4 US3M + 0.52% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), July 2007 Pounds Sterling 4.9 Perpetuity Banco Popular Pastor FRN, June 2004 Euro 11.7 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 6.25% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 564 basis points on the five-year Mid-Swap Rate. E. Payment is subject to certain conditions and to the discretion of the Bank. The 6.75% 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. F. 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. G. 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 every 5 years applying a margin of 409.7 basis points on the five-year Mid-Swap Rate. H. Payment is subject to certain conditions and to the discretion of the Bank. The 7.50% interest rate is set for the first five years. After that, it will be reviewed every 5 years by applying a margin of 498.9 basis points on the five-year Mid-Swap Rate. I. Listed in the US. 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.

Introduction, basis of presen_2

Introduction, basis of presentation of the Consolidated Financial Statements and other information (Tables)	6 Months Ended
	Jun. 30, 2019
Intro, basis of presentation of the consolidated financial statements and other information
Explanation of difference between operating lease commitments disclosed applying IAS 17 and lease liabilities recognised at date of initial application of IFRS 16 [text block]	Millions of euros Operating lease commitments at December 31, 2018 8,699 Amount of operating lease commitments discounted by the Group rate 6,550 (+) Liabilities under financial leases at December 31, 2018 96 (-) Short-term leases recognised as expenses on a straight-line basis (20) (-) Low-value leases recognised as expenses on a straight-line basis (2) (-) Contracts revalued as service contracts — (+)/(-) Adjustments resulting from different treatment of extension and termination options 556 (+)/(-) Adjustments related to changes in the index or rate affecting variable payments — Lease liability at January 1, 2019 7,180

Distribution of the Bank's pr_2

Distribution of the Bank's profit, shareholder remuneration scheme and earnings per share (Tables)	6 Months Ended
	Jun. 30, 2019
Shareholder remuneration system and earnings per share
Schedule of shareholder remuneration	06-30-2019 06-30-2018 % of par Euros per Amount % of par Euros per Amount of euros) Ordinary shares 26.00 % 0.130 2,110 24.00 % 0.120 1,936 Other shares (without vote, redeemable, etc.) — — — — — — Total remuneration paid 26.00 % 0.130 2,110 24.00 % 0.120 1,936 Dividend paid out of profit 13.00 % 0.065 1,055 12.00 % 0.060 968 Dividend paid with a charge to reserves or share premium 13.00 % 0.065 1,055 12.00 % 0.060 968 Dividend in kind — — — — — — Flexible payment — — — — — —
Earnings per share basic and diluted	Basic earnings per share for the period are calculated by dividing the net profit attributable to the Group for the six-month period adjusted by the after-tax amount relating to the remuneration of contingently convertible preference shares recognised in equity by the weighted average number of ordinary shares outstanding during the period, excluding the average number of treasury shares held in the period. Accordingly: 06-30-2019 06-30-2018 Profit attributable to the Parent (millions of euros) 3,231 3,752 Remuneration of contingently convertible preference shares (millions of euros) (298) (266) 2,933 3,486 Of which: Profit or Loss from discontinued operations (non controlling interest net) (millions of euros) — — Profit or Loss from continuing operations (PPC net) (millions of euros) 2,933 3,486 Weighted average number of shares outstanding 16,231,374,256 16,129,055,793 Basic earnings per share (euros) 0.18 0.22 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.18 0.22 ii. Diluted earnings per share Diluted earnings per share for the period are calculated by dividing the net profit attributable to the Group for the six-month period adjusted by the after-tax amount relating to the remuneration of contingently convertible preference shares recognised in equity and of perpetual liabilities contingently amortisable in their case by the weighted average number of ordinary shares outstanding during the period, excluding the average number of treasury shares and adjusted for all the dilutive effects inherent to potential ordinary shares (share options, warrants and convertible debt instruments). Accordingly, diluted earnings per share were determined as follows: 06-30-2019 06-30-2018 Profit attributable to the Parent (millions of euros) 3,231 3,752 Remuneration of contingently convertible preference shares (millions of euros) (298) (266) Dilutive effect of changes in profit for the period arising from potential conversion of ordinary shares — — 2,933 3,486 Of which: Profit or Loss from discontinued operations (non controlling interest net) (millions of euros) — — Profit or Loss from continuing operations (PPC net) (millions of euros) 2,933 3,486 Weighted average number of shares outstanding 16,231,374,256 16,129,055,793 Dilutive effect of options/receipt of shares 41,832,881 45,858,082 Adjusted number of shares 16,273,207,137 16,174,913,875 Diluted earnings per share (euros) 0.18 0.22 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.18 0.22

Remuneration and other benefi_2

Remuneration and other benefits paid to the Bank's directors and senior managers (Tables)	6 Months Ended
	Jun. 30, 2019
Related party transactions key personnel
Schedule of funds and pension plans of senior management	Thousands of euros 06-30-2019 06-30-2018 Senior management: Pension funds: Endowments and / or contributions (1) 3,190 2,739 Pension funds: Accumulated rights (2) 71,237 62,872 (1) Corresponds to the allocations and/or contributions made during the first six months of 2019 and 2018 as retirement pensions. (2) Corresponds to the rights accrued by members of senior management in the area of pensions. In addition, former members of senior management had at June 30, 2019 and June 30, 2018 rights accumulated for this same concept for EUR 166,960 thousands and EUR 173,819 thousands, respectively.
Bank's Directors
Related party transactions key personnel
Schedule of total remuneration paid	Thousands of euros 06-30-2019 06-30-2018 Members of the board of directors (2) (3): Remuneration concept Fixed salary remuneration of executive directors 3,459 3,759 Variable salary remuneration of executive directors — — Directors fees 579 488 Bylaw-stipulated emoluments (annual emolument) 1,853 1,785 Other (except insurance premiums) (4) 3,354 691 Sub-total 9,245 6,723 Transactions with shares and/or other financial instruments — — 9,245 6,723 (1) The notes to the consolidated annual accounts for 2019 will contain detailed and complete information on the remuneration paid to all the directors, including executive directors. (2) Mr. Rodrigo Echenique Gordillo ceased his executive duties with effective date May 1, 2019, continuing from that date as a non-executive director. (3) Mr. Juan Miguel Villar Mir ceased as member of the board of director on January 1, 2019. (4) It includes the amount related to the post-contractual non-compete agreement pact received by Mr. Rodrigo Echenique Gordillo as a result of having ceased in his executive functions with effective date May 1, 2019. The comparison of the figures of the two semesters is affected by the timing difference (semi-annual or annual) of the concepts included in the category.
Schedule of other benefits of the directors	Thousands of euros 06-30-2019 06-30-2018 Members of the board of directors: Other benefits- Advances — — Loans granted 121 84 Pension funds and plans: Endowments and/or contributions (1) 1,001 1,341 Pension funds and plans: Accumulated rights (2) 77,153 75,804 Life insurance premiums 1,069 862 Guarantees provided for directors — — (1) These correspond to the endowments and/or contributions made during the first six months of 2019 and 2018 in respect of retirement pensions and complementary benefits for widowhood, orphanhood and permanent disability. (2) Corresponds to the rights accrued by the directors in matters of pensions. It also includes for informational purposes the rights accumulated by Mr. Rodrigo Echenique Gordillo, although these rights corresponded to Mr. Echenique before his appointment as executive director. Additionally, former members of the board had at June 30, 2019 and June 30, 2018 rights accrued for this concept for 68,201 thousands of euros and 79,465 thousands of euros, respectively.
Current senior managers
Related party transactions key personnel
Schedule of total remuneration paid	Thousands of euros 06-30-2019 06-30-2018 Senior management (1): Total remuneration of senior management (2) 17,690 16,972 (1) Remunerations regarding to members of senior management who, during the six month period ended June 30, 2019, had ceased their duties amount to EUR 96 thousands (June 30, 2018: EUR 10 thousands). (2) The number of senior managers of the Bank, excluding executive directors, is 18 as at June 30, 2019. (No changes regarding the figure published at June 30, 2018).

Financial assets (Tables)

Financial assets (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Schedule of components of financial assets	Millions of euros 06-30-2019 Financial held trading Non-trading Financial Financial Financial Derivatives 57,798 — — — — Equity instruments 11,133 3,367 — 2,789 — Debt instruments 33,343 1,628 3,496 111,891 39,382 Loans and advances 300 398 69,924 3,382 941,664 Central Banks — — 7,105 — 19,450 Credit institutions — — 39,810 — 41,068 Customers 300 398 23,009 3,382 881,146 Total 102,574 5,393 73,420 118,062 981,046 Millions of euros 12-31-2018 Financial Non-trading Financial Financial Financial Derivatives 55,939 — — — — Equity instruments 8,938 3,260 — 2,671 — Debt instruments 27,800 5,587 3,222 116,819 37,696 Loans and advances 202 1,883 54,238 1,601 908,403 Central Banks — — 9,226 — 15,601 Credit institutions — 2 23,097 — 35,480 Customers 202 1,881 21,915 1,601 857,322 Total 92,879 10,730 57,460 121,091 946,099
Disclosure of financial assets that are either past due or impaired [text block]	Millions of euros 06-30-2019 06-30-2018 Balance as at beginning of period 35,091 37,275 Net additions 4,581 5,070 Written-off assets (6,246) (6,140) Exchange differences and other 343 (267) Balance as at end of period 33,769 35,938
Schedule of guarantees received for financial assets	Millions of euros 06-30-2019 12-31-2018 Real guarantees value 509,859 460,674 Of which: non-performing risks 12,080 13,566 Other guarantees value 29,298 36,727 Of which: non-performing risks 558 1,131 Total value of the guarantees received 539,157 497,401
Schedule of financial assets measured at other than fair value	Millions of euros Millions of euros 06-30-2019 12-31-2018 Carrying amount Fair value Carrying amount Fair value Financial assets at amortised cost Financial assets at amortised cost Loans and advances 941,664 952,624 Loans and advances 908,403 914,013 Central banks 19,450 19,450 Central banks 15,601 15,610 Loans and advances to credit institutions 41,068 41,309 Loans and advances to credit institutions 35,480 35,833 Loans and advances to customers 881,146 891,865 Loans and advances to customers 857,322 862,570 Debt instruments 39,382 40,058 Debt instruments 37,696 38,095 ASSETS 981,046 992,682 ASSETS 946,099 952,108
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]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [text block]	Millions of euros 06-30-2019 06-30-2018 (*) Balance as at beginning of period 23,945 26,656 Impairment losses charged to income for the period 5,199 5,174 Of which: Impairment losses charged to income 9,697 9,042 Impairment losses reversed with a credit to income (4,498) (3,868) Write-off of impaired balances against recorded impairment allowance (6,246) (6,140) Exchange differences and other 434 (749) Balance as at end of period 23,332 24,941 Of which, relating to: Impaired assets 15,110 16,131 Other assets 8,222 8,810 Of which: Individually calculated 4,983 6,146 Collectively calculated 18,349 18,795 (*) See reconciliation of IAS 39 December 31, 2017 to IFRS 9 January 1, 2018 (Note 1.b of the 2018 Consolidated Annual Accounts).
Financial assets at amortised cost, category | 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]
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [text block]	Millions of euros Stage 1 Stage 2 Stage 3 Total Loss allowance as at beginning of period 3,658 4,743 14,906 23,307 Transfers between stages (442) (246) 3,160 2,472 Net exposure changes and modifications in the credit risk 673 (336) 2,419 2,756 Write-offs — — (6,246) (6,246) Exchange differences and other (54) 198 290 434 Carrying amount as of June 30, 2019 3,835 4,359 14,529 22,723
Gross carrying amount
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Disclosure of concentrations	Millions of euros 06-30-2019 12-31-2018 Impairment value correction Impairment value correction Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Financial assets at fair value through other comprehensive income 115,278 6 — 115,284 118,422 6 — 118,428 Debt instruments 111,899 — — 111,899 116,825 — — 116,825 Loans and advances 3,379 6 — 3,385 1,597 6 — 1,603 Central Banks — — — — — — — — Credit institutions — — — — — — — — Customers 3,379 6 — 3,385 1,597 6 — 1,603 Financial assets at amortised cost 919,584 51,025 33,146 1,003,755 882,661 52,295 34,333 969,289 Debt instruments 39,129 114 736 39,979 37,339 117 870 38,326 Loans and advances 880,455 50,911 32,410 963,776 845,322 52,178 33,463 930,963 Central Banks 19,450 — — 19,450 15,601 — — 15,601 Credit institutions 41,081 — 1 41,082 35,489 1 2 35,492 Customers 819,924 50,911 32,409 903,244 794,232 52,177 33,461 879,870 Total 33,146 34,333

Non-current assets (Tables)

Non-current assets (Tables)	6 Months Ended
	Jun. 30, 2019
Non-current assets held for sale
Schedule of non-current assets	Millions of euros 06-30-2019 06-30-2018 Tangible assets 4,535 5,424 Of which: Foreclosed assets 4,450 5,334 Of which: Property assets in Spain (*) 3,606 4,488 Other tangible assets held for sale 85 90 Other assets — 2 4,535 5,426 (*) During the first six months of 2019, the sale of foreclosed real estate assets to Cerberus took place, generating EUR 180 million losses.

Intangible assets - Goodwill (T

Intangible assets - Goodwill (Tables)	6 Months Ended
	Jun. 30, 2019
Intangible assets - Goodwill
Schedule of goodwill based on cash-generating units	Millions of euros 06-30-2019 12-31-2018 Santander UK 8,288 8,307 Banco Santander (Brasil) 4,554 4,459 Santander Bank Polska 2,431 2,402 Santander Consumer USA 2,115 2,102 Santander Bank, National Association 1,804 1,793 Santander Consumer Germany 1,217 1,217 SAM Investment Holdings Limited 1,173 1,173 Santander Portugal 1,040 1,040 Santander España 1,023 1,023 Banco Santander Chile 644 627 Santander Consumer Nordics 494 502 Grupo Financiero Santander (Mexico) 448 434 Other entities 382 387 Total Goodwill 25,613 25,466

Financial liabilities (Tables)

Financial liabilities (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of financial liabilities [line items]
Schedule of components of financial liabilities other than hedging derivatives	Millions of euros 06-30-2019 12-31-2018 Financial Financial Financial Financial Financial Financial Derivatives 58,341 — — 55,341 — — Short Positions 15,846 — — 15,002 — — Deposits — 56,990 937,710 — 65,304 903,101 Central banks — 8,836 71,778 — 14,816 72,523 Credit institutions — 10,305 89,030 — 10,891 89,679 Customer — 37,849 776,902 — 39,597 740,899 Debt instruments — 3,117 251,672 — 2,305 244,314 Other financial liabilities — 130 34,812 — 449 24,215 Total 74,187 60,237 1,224,194 70,343 68,058 1,171,630
Schedule of financial liabilities rollforward	Millions of euros 06-30-2019 Opening Perimeter Issues Repurchases or Exchange Closing Bonds and debentures outstanding 195,498 — 32,105 (26,713) 1,574 202,464 Subordinated 23,676 — 1,056 (3,502) 47 21,277 Bonds and debentures outstanding and subordinated liabilities issued 219,174 — 33,161 (30,215) 1,621 223,741 Millions of euros 06-30-2018 Opening Perimeter Issues Repurchases or Exchange Closing Bonds and debentures outstanding 176,719 — 35,957 (29,081) (765) 182,830 Subordinated 21,382 — 2,987 (644) 89 23,814 Bonds and debentures outstanding and subordinated liabilities issued 198,101 — 38,944 (29,725) (676) 206,644
Schedule of financial liabilities measured at other than fair value	Millions of euros 06-30-2019 12-31-2018 Carrying amount Fair value Carrying amount Fair value Deposits 937,710 937,371 903,101 902,680 Central banks 71,778 71,362 72,523 72,039 Credit institutions 89,030 89,078 89,679 89,662 Customer 776,902 776,931 740,899 740,979 Debt instruments 251,672 259,005 244,314 247,029 Other financial liabilities 34,812 34,860 24,215 24,197 Liabilities 1,224,194 1,231,236 1,171,630 1,173,906
Debt instruments liability
Disclosure of financial liabilities [line items]
Schedule of components of financial liabilities other than hedging derivatives	Millions of euros 06-30-2019 12-31-2018 Bonds and debentures outstanding 202,464 Subordinated 21,277 Promissory notes and other securities 31,048 Total debt instruments issued 254,789

Provisions (Tables)

Provisions (Tables)	6 Months Ended
	Jun. 30, 2019
Other combined provisions
Disclosure of subsidiaries [line items]
Schedule of other provisions by type of provision	Millions of euros 06-30-2019 12-31-2018 Provisions for taxes 831 864 Provisions for employment-related proceedings (Brazil) 845 859 Provisions for other legal proceedings 1,477 1,451 Provision for customer remediation 689 652 Regulatory framework-related provisions 83 105 Provision for restructuring 689 492 Other 1,305 1,226 5,919 5,649

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Other comprehensive income by item
Schedule of other comprehensive income components	Millions of euros 06-30-2019 12-31-2018 Other comprehensive income accumulated (21,425) (22,141) Items not reclassified to profit or loss (3,625) (2,936) Actuarial gains or losses on defined benefit pension plans (4,141) (3,609) Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates 1 1 Other valuation adjustments — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income 527 597 Inefficacy 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 (12) 75 Items that may be reclassified to profit or loss (17,800) (19,205) Hedge of net investments in foreign operations (effective portion) (5,074) (4,312) Exchange differences (14,927) (15,730) Hedging derivatives. Cash flow hedges (effective portion) 393 277 Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income 2,051 828 Hedging instruments (items not designated) — — Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (243) (268)
Schedule of changes in fair value of equity instruments that will not be reclassified	Millions of euros 06-30-2019 12-31-2018 Net Net Revaluation Revaluation revaluation Fair Revaluation Revaluation revaluation Fair gains losses gains/(losses) value gains losses gains/(losses) value Equity instruments Domestic Spain 19 (444) (425) 185 20 (216) (196) 417 International Rest of Europe 60 (78) (18) 319 160 (76) 84 652 United States 13 — 13 45 9 — 9 42 Latin America and rest 960 (3) 957 2,240 708 (8) 700 1,560 1,052 (525) 527 2,789 897 (300) 597 2,671 Of which: Listed 961 (15) 946 2,289 818 (18) 800 1,943 Unlisted 91 (510) (419) 500 79 (282) (203) 728
Schedule of other comprehensive income, that may be reclassified to profit or loss, by type of instrument and geographical origin of the issuer	Millions of euros 06-30-2019 12-31-2018 Net Net revaluation revaluation Revaluation Revaluation gains/ Fair Revaluation Revaluation gains/ Fair gains losses (losses) value gains losses (losses) value Debt instruments Government and central banks debt instruments Spain 717 (4) 713 29,002 323 (3) 320 38,550 Rest of Europe 679 (32) 647 20,039 373 (55) 318 17,494 Latin America and rest of the world 715 (42) 673 44,820 448 (117) 331 42,599 Private-sector debt instruments 80 (62) 18 21,412 37 (178) (141) 19,777 2,191 (140) 2,051 115,273 1,181 (353) 828 118,420

Primary and secondary segment_2

Primary and secondary segment reporting (Tables)	6 Months Ended
	Jun. 30, 2019
Primary and secondary segment reporting
Schedule of revenue by secondary segment	Millions of euros Revenue from ordinary activities Profit Profit before taxes Segment 06-30-2019 06-30-2018 06-30-2019 06-30-2018 06-30-2019 06-30-2018 Europe 16,190 16,406 2,354 2,422 3,549 3,610 South America 14,420 15,497 1,961 690 3,661 1,265 North America 8,768 7,179 889 1,846 1,594 3,499 Santander Global Platform 61 52 (51) (23) (70) (29) Corporate Centre (101) (178) (1,108) (883) (1,155) (865) Underlying Profit 39,338 38,956 4,045 4,052 7,579 7,480 Adjustments — — (814) (300) (1,048) (581) Statutory Profit 39,338 38,956 3,231 3,752 6,531 6,899

Related parties (Tables)

Related parties (Tables)	6 Months Ended
	Jun. 30, 2019
Related parties
Schedule of related party transactions	Millions of euros 06-30-2019 Expenses and income Significant Directors and Individuals, Group companies Other related Total Expenses: Finance costs — — 1 — 1 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 13 — 13 — — 14 — 14 Income: Finance income — — 46 — 46 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 490 — 490 — — 536 — 536 Millions of euros 06-30-2019 Other transactions Significant Directors and Individuals, Group companies Other related Total Financing agreements: loans and capital contributions (lender) — — 617 (6) 611 Financing agreements: loans and capital contributions (borrower) — — 289 12 301 Guarantees provided — — (21) — (21) Guarantees received — — — — — Commitments acquired — — 75 (24) 51 Dividends and other distributed profit — 5 — 20 25 Other transactions — — — — — Millions of euros 06-30-2019 Balance closing period Significant Directors and executives Individuals, Group companies or entities Other related parties Total Debt balances: Customers and commercial debtors — — — — — Loans and credits granted — 24 7,688 61 7,773 Other collection rights — — 515 17 532 — 24 8,203 78 8,305 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 35 2,222 77 2,334 Other payment obligations — — 42 — 42 — 35 2,264 77 2,376 Millions of euros 06-30-2018 Expenses and income Significant Directors and Individuals, Group companies Other related Total Expenses: Finance costs — — 1 1 2 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 47 — 47 — — 48 1 49 Income: Finance income — — 33 6 39 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 437 14 451 — — 470 20 490 Millions of euros 06-30-2018 Other transactions Significant Directors and Individuals, Group companies Other related Total Financing agreements: loans and capital contributions (lender) — 1 324 (164) 161 Financing agreements: loans and capital contributions (borrower) — 2 (251) 335 86 Guarantees provided — — — 31 31 Guarantees received — — — — — Commitments acquired — — 75 (2) 73 Dividends and other distributed profit — 4 — 18 22 Other transactions — — 9 220 229

Off-balance-sheet exposures (Ta

Off-balance-sheet exposures (Tables)	6 Months Ended
	Jun. 30, 2019
Off-balance-sheet exposures
Schedule of contingent commitments	Millions of euros 06-30-19 12-31-18 Loan commitments granted 223,954 218,083 Of which doubtful 339 298 Financial guarantees granted 12,077 11,723 Of which doubtful 161 181 Bank sureties 12,004 11,558 Credit derivatives sold 73 165 Other commitments granted 94,785 74,389 Of which doubtful 889 983 Other granted guarantees 33,447 35,154 Other 61,338 39,235

Average headcount and number _2

Average headcount and number of offices (Tables)	6 Months Ended
	Jun. 30, 2019
Average headcount and number of offices
Schedule of average number of employees	Bank Group Average headcount 06-30-2019 06-30-2018 06-30-2019 06-30-2018 Men 16,240 11,585 91,609 91,051 Women 13,739 9,906 110,789 110,833 29,979 21,491 202,398 201,884
Number Of Offices [Table Text Block]	Group Number of branches 06-30-2019 12-31-2018 Spain 4,296 4,427 Foreign 8,785 8,790 13,081 13,217

Other disclosures (Tables)

Other disclosures (Tables)	6 Months Ended
	Jun. 30, 2019
Disclosure of credit risk exposure [line items]
Summary of fair values of financial assets and liabilities	Millions of euros 06-30-19 12-31-18 Published price Published price quotations in active quotations in markets Internal models active markets Internal models (Level 1) (Levels 2 and 3) Total (Level 1) (Levels 2 and 3) Total Financial assets held for trading 44,404 58,170 102,574 37,108 55,771 92,879 Non-trading financial assets mandatorily at fair value through profit or loss 1,695 3,698 5,393 1,835 8,895 10,730 Financial assets at fair value through profit and loss 2,739 70,681 73,420 3,102 54,358 57,460 Financial assets at fair value through other comprehensive income 98,629 19,433 118,062 103,590 17,501 121,091 Hedging derivatives (assets) — 8,451 8,451 — 8,607 8,607 Financial liabilities held for trading 16,861 57,326 74,187 16,104 54,239 70,343 Financial liabilities designated at fair value through profit or loss 1,350 58,887 60,237 987 67,071 68,058 Hedging derivatives (liabilities) 5 7,262 7,267 5 6,358 6,363 Liabilities under insurance contracts — 731 731 — 765 765
Schedule of financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3)	Millions of euros Millions of euros Fair values calculated using Fair values calculated using internal models at internal models at 06-30-19 (*) 12-31-18 (*) Level 2 Level 3 Level 2 Level 3 Valuation techniques Main inputs ASSETS 153,100 7,333 140,659 4,473 Financial assets held for trading 57,567 603 55,033 738 Customers (**) 300 — 205 — Present value method Yield curves, FX market prices Debt instruments and equity instruments 990 74 314 153 Present value method Yield curves, HPI, FX market prices Derivatives 56,277 529 54,514 585 Swaps 47,337 191 44,423 185 Present value method, Gaussian Copula (***) Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 388 3 617 2 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 3,679 190 3,778 149 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures 11 — — — Present value method Yield curves, FX market prices Index and securities options 1,376 113 1,118 198 Black-Scholes Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 3,486 32 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 8,443 8 8,586 21 Swaps 7,906 — 7,704 21 Present value method FX market prices, Yield curves, Basis Interest rate options 17 8 20 — Black's Model FX market prices, Yield curves, Volatility surfaces Other 520 — 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 1,747 1,951 7,492 1,403 Equity instruments 1,083 612 985 462 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 653 953 5,085 481 Present value method Interest rates curves Loans and receivables (**) 11 386 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 69,664 1,017 53,482 876 Central banks 7,105 — 9,226 — Present value method Interest rates curves, FX market prices Credit institutions 39,760 50 22,897 201 Present value method Interest rates curves, FX market prices Customers (****) 22,599 411 21,355 560 Present value method Interest rates curves, FX market prices, HPI Debt instruments 200 556 4 115 Present value method Interest rates curves, FX market prices Financial assets at fair value through other comprehensive income 15,679 3,754 16,066 1,435 Equity instruments 122 346 455 581 Present value method Market price, Interest rates curves, Dividends and Others Debt instruments 15,391 192 14,699 165 Present value method Interest rates curves, FX market prices Loans and receivables 166 3,216 912 689 Present value method Interest rates curves, FX market prices and Credit curves and Liquidity. LIABILITIES 123,600 606 127,991 442 Financial liabilities held for trading 57,069 257 53,950 289 Derivatives 57,024 257 53,950 289 Swaps 47,255 110 43,489 111 Present value method, Gaussian Copula (***) Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 464 — 610 7 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 4,709 32 4,411 26 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Index and securities options 1,365 105 1,233 143 Black-Scholes Model Yield curves, FX market prices Interest rate and equity futures 25 — 7 — Black's Model Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 3,206 10 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 45 — — — Present value method Yield curves ,FX & EQ market prices, Equity Hedging derivatives 7,260 2 6,352 6 Swaps 6,513 — 5,868 6 Present value method Yield curves ,FX & EQ market prices, Basis Interest rate options 8 2 158 — Black's Model Yield curves , Volatility surfaces, FX market prices, Liquidity Other 739 — 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 58,540 347 66,924 147 Present value method Yield curves, FX market prices Liabilities under insurance contracts 731 — 765 — (*) The internal models of Level 2 implement figures based on the parameters observed in the market, while Level 3 internal models uses significant inputs that are not observable 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 negative net fair value of EUR 2 million recognised in the interim condensed consolidated balance sheet (December 31, 2018: net fair value of EUR 0 million ). These assets and liabilities are measured using the Standard Gaussian Copula Model. (****) Includes residential mortgages to financial institutions in the United Kingdom (which are regulated and partly financed by the Government). The fair value of these loans has been obtained using observable market variables, including current market transactions of similar amount and guarantees provided by the UK Housing Association. Given that the Government is involved in these entities, credit risk spreads have remained stable and homogeneous in this sector. The results arising from the valuation model are contrasted 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 (in millions of euros) Portfolio/Instrument Weighted Unfavorable 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% 2.53% (4.4) 4.3 HPI spot rate n/a 795.75 (**) (9.8) 9.8 Interest curves, Price market FX CPR n/a n/a (163.2) 84.4 Quanto options (c) Local term volatility and reference strike under the partial differential equation method Non-existent market volatility, a proxy is used Beta vs Volatility Surface STOXX50E 69%-62% Beta 65% — — Financial assets at fair value through other comprehensive income Debt instruments and equity holdings Present Value Method, others Contingencies for litigations 0%-100% 22% (27.2) 7.7 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 curves, price market FX and credit curves (a) (a) 1.8 (1.8) Local Volatility Long term volatility n/a 34.0% 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% 2.66% (5.9) 5.2 Debt instruments and equity instruments HPI spot rate n/a 788.41 (**) (10.7) 10.7 TD Black Spain Volatility n/a 4.7% 2.2 (11.5) Asset Swap Model & CDS Interest and credit curve models n/a 7.7% (19.8) 4.4 Cvx. Adj (SLN) Long term volatility n/a 8.0% (121.2) 105.1 Financial liabilities held for trading Trading derivatives Present Value Method, Modified Black-Scholes Model HPI forward growth rate 0%-5% 2.41% (7.8) 7.3 HPI spot rate n/a 776.48 (**) (4.3) 5.0 Curves on TAB indices (*) (a) (a) — — Discounted flows denominated in different currencies Long term rate MXN Bid Offer Spread IRS TIIE 2bp - 6bp X-CCY USD/MXN 3bp - 10bp Swaps UDI/MXN 5bp - 10bp IRS TIIE 3bp X-CCY MXN/USD 4bp Swaps UDI/MXN 10bp (0.481) 0.480 Hedging Derivatives (Liabilities) Advances models of local volatility and stochastic Correlation between prices and shares 55%-75% 65% Not applicable Not applicable Advanced multi-factor interest rate models Reversion to average interest rate 0.0001-0.03 0.01 (***) — — Financial liabilities designated at fair value through profit or loss — — — — (b) (b) (*) TAB: “Tasa Activa Bancaria” (Active Bank Rate). Average deposit interest rates (over 30, 90, 180 and 360 days) published by the Chilean Association of Banks and Financial Institutions (ABIF) in nominal currency (Chilean peso) and in real terms, adjusted for inflation (Unidad de Fomento - UF). (**) There are national and regional HPI indices. The HPI spot value is the weighted average of the indices that correspond to the positions of each portfolio. The impact reported is a change of 10%. (***) Theoretical average value of the parameter. The change arising on a favourable scenario is from 0.0001 to 0.03. An unfavourable scenario is not considered as there is insufficient margin for an adverse change from the current parameter level. (a) The exercise was conducted for the unobservable inputs described in the “main unobservable inputs” column under probable scenarios. The range and weighted average value used are not shown because the aforementioned exercise was conducted jointly for various inputs or variants thereof (e.g. the TAB input comprises vector-time curves, for which there are also nominal yield curves and inflation-indexed yield curves), and it was not possible to break down the results separately by type of input. In the case of the TAB curve the gain or loss is reported for changes of +/-100 b.p. for the total sensitivity to this index in CLP and CLF. The same is applicable to the MXN interest rates. (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. (c) No impacts have arisen in Quanto options as the exposure is back to back completely covered.
Schedule of changes in financial instruments classified as Level 3	01-01-19 Changes 06-30-19 Fair value Changes in Changes in Fair value calculated using fair value fair value calculated using internal models Purchases/ Sales/ recognized in recognized Level internal models Millions of euros (Level 3) Issuances Settlements profit or loss in equity reclassifications Other (Level 3) Financial assets held for trading 738 58 (46) 45 — (200) 8 603 Debt instruments 153 13 (24) (2) — (69) 3 74 Trading derivatives 585 45 (22) 47 — (131) 5 529 Swaps 185 1 (8) 15 — (3) 1 191 Exchange rate options 2 — — 1 — — — 3 Interest rate options 149 — — 10 — 31 — 190 Index and securities options 198 33 (11) 21 — (132) 4 113 Other 51 11 (3) — — (27) — 32 Hedging derivatives (Assets) 21 8 — — — (21) — 8 Swaps 21 — — — — (21) — — Interest rate options — 8 — — — — — 8 Trading financial assets at fair value through profit or loss 876 — (1) 1 — 176 (35) 1,017 Credit institutions 201 — — — — (151) - 50 Loans and advances to customers 560 — (1) — — (112) (36) 411 Debt instruments 115 — — 1 — 439 1 556 Non-trading financial assets mandatorily at fair value through profit or loss 1,403 674 (187) 70 — (7) (2) 1,951 Loans and advances to customers 460 67 (176) 19 — — 16 386 Debt instruments 481 493 (2) 3 — (8) (14) 953 Equity instruments 462 114 (9) 48 — 1 (4) 612 Financial assets at fair value through other comprehensive income 1,435 3,268 (502) — (209) (316) 78 3,754 TOTAL ASSETS 4,473 4,008 (736) 116 (209) (368) 49 7,333 Financial liabilities held for trading 289 42 (2) 42 — (120) 6 257 Trading derivatives 289 42 (2) 42 — (120) 6 257 Swaps 111 2 — 4 — (6) (1) 110 Exchange rate options 7 — — — — (7) — — Interest rate options 26 — — 3 — — 3 32 Index and securities options 143 40 (2) 34 — (113) 3 105 Others 2 — — 1 — 6 1 10 Hedging derivatives (Liabilities) 6 2 — — — (6) — 2 Swaps 6 — — — — (6) — — Interest rate options — 2 — — — — — 2 Financial liabilities designated at fair value through profit or loss 147 291 (2) 6 — (93) (2) 347 TOTAL LIABILITIES 442 335 (4) 48 — (219) 4 606
Schedule of sovereign risk	Sovereign risk by country of issuer/borrower at June 30, 2019 (*) Millions 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 Other than or loss positions income profit or loss cost (**) exposure CDSs CDSs Spain 6,084 (1,710) 16,379 — 7,249 13,932 41,934 522 — Portugal 365 (759) 5,633 — 564 3,686 9,489 — — Italy 1,151 (159) 3,188 — 387 62 4,629 3 (3) Ireland — — — — — — — (1) — (*) Information prepared under EBA standards. Also, there are government debt instruments on insurance companies balance sheets amounting to EUR 15,005 million (of which EUR 13,131 million, EUR 1,406 million, EUR 466 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 5,012 million (of which EUR 4,423 million, EUR 297 million and EUR 292 million to Spain, Portugal and Italy, respectively). (**) Presented without taking into account the valuation adjustments recognised (EUR 22 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, 2018 (*) Millions 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 Other than or loss positions income profit or loss cost (**) exposure CDSs CDSs 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 — (*) 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 different to derivatives –contingent liabilities and commitments– amounting to EUR 5,622 million (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.
Schedule of other counterparties risk	Exposure to other counterparties by country of issuer/borrower at June 30, 2019 (*) Millions 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 28,154 7,433 614 1,236 322 4,355 196,633 238,747 3,674 2 Portugal 2,179 205 31 38 — 3,561 33,946 39,960 1,084 — Italy 361 3,618 328 578 — 148 11,016 16,049 740 — Greece — — — — — — 71 71 33 — Ireland — — 30 1,398 — 21 8,564 10,013 245 — (*) Also, the Group has off-balance-sheet exposure other than derivatives -contingent liabilities and commitments- amounting to EUR 85,514 million, EUR 7,951 million, EUR 3,842 million, EUR 200 million and EUR 801 million to counterparties in Spain, Portugal, Italy, Greece and Ireland, respectively. (**) Presented without taking into account valuation adjustments or impairment corrections (EUR 8,304 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, 2018 (*) Millions 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 — (*) 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. (**) They are 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.
Schedule of credit default swaps	06-30-19 Millions of euros Notional amount Fair value Bought Sold Net Bought Sold Net Spain Sovereign — — — — — — Other 216 380 (164) (2) 4 2 Portugal Sovereign 26 26 — — — — Other — — — — — — Italy Sovereign 312 9 303 (3) — (3) Other 60 153 (93) (4) 4 — 12-31-18 Millions 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 —
Schedule of regulatory capital	06-30-2019 12-31-2018 Capital coefficients Level 1 ordinary eligible capital (millions of euros) 68,406 67,962 Level 1 additional eligible capital (millions of euros) 9,509 9,754 Level 2 eligible capital (millions of euros) 11,867 11,009 Risk-weighted assets (millions of euros) 605,470 592,319 Level 1 ordinary capital coefficient (CET 1) 11.30 % 11.47 % Level 1 additional capital coefficient (AT1) 1.57 % 1.65 % Level 1 capital coefficient (TIER1) 12.87 % 13.12 % Level 2 capital coefficient (TIER 2) 1.96 % 1.86 % Total capital coefficient 14.83 % 14.98 %
Schedule of leverage capital and ratios	06-30-2019 12-31-2018 Leverage Tier 1 capital (Millions of euros) 77,915 77,716 Exposure (Millions of euros) 1,552,573 1,489,094 Leverage ratio 5.02 % 5.22 %
Foreclosed assets
Disclosure of credit risk exposure [line items]
Schedule of exposure to risk	06-30-2019 Of which: Impairment Gross losses carrying Valuation since time of Carrying Millions of euros amount Adjustments the foreclosure amount Property assets arising from financing provided to construction and property development companies 7,008 3,726 2,519 3,282 Of which: Completed Buildings 2,286 839 523 1,447 Residential 587 195 90 392 Other 1,699 644 433 1,055 Buildings under construction 353 127 74 226 Residential 341 123 74 218 Other 12 4 - 8 Land 4,369 2,760 1,922 1,609 Developed Land 1,610 980 586 630 Other land 2,759 1,780 1,336 979 Property assets from home purchase mortgage loans to households 935 291 135 644 Other foreclosed property assets 419 161 83 258 Total property assets 8,362 4,178 2,737 4,184
Forborne loan portfolio
Disclosure of credit risk exposure [line items]
Schedule of exposure to risk	06-30-2019 Total Of which: Non performing/Doubtful Without collateral With collateral Without collateral (a) With collateral Maximum amount of Accumulated Maximum amount of Accumulated collateral that can be Impairment collateral that can be Impairment Amounts in millions of euros, considered or losses at considered or losses at except number of transactions Number of Gross Number of Gross Mortgage Other fair value due Number of Gross Number of Gross Mortgage Other fair value due in units transactions amount operations amount guarantee guarantees to credit risk transactions amount transactions amount guarantee guarantees to credit risk Credit entities — — — — — — — — — — — — — — Public sector 36 34 16 10 8 — 2 11 3 10 4 3 — 1 Other financial institutions and: individual shareholder) 585 58 268 102 15 28 28 290 26 126 18 10 1 20 Non financial institutions and individual shareholder 145,564 5,916 45,194 12,919 8,398 1,272 5,825 89,277 3,927 30,229 7,793 5,143 622 5,408 Of which: Financing for constructions and property development 5,963 252 1,909 1,653 1,363 46 594 4,246 200 1,400 1,146 877 44 576 Other warehouses 1,640,494 3,627 724,916 12,743 7,528 2,382 4,267 922,436 1,792 145,102 4,546 3,310 367 2,835 Total 1,786,679 9,635 770,394 25,774 15,949 3,682 10,122 1,012,014 5,748 175,467 12,361 8,466 990 8,264 Financing classified as non-current assets — — — — — — — — — — — — — —
Schedule of changes in loss allowance and gross carrying amount	Millions of euros Carrying amount 06-30-2019 Beginning balances 30,527 Refinancing and restructuring of the period 2,828 Memorandum items: impact recorded in the income statement for the period 1,177 Debt repayment (3,880) Foreclosures (249) Derecognised from the consolidated balance sheet (892) Other variations (3,047) Balances at end of year 25,287
Home purchase loans | SPAIN
Disclosure of credit risk exposure [line items]
Schedule of exposure to risk	06-30-19 Millions of euros Gross Of which: Amount Non-performing Home purchase loans to families - Without mortgage guarantee 374 26 - With mortgage guarantee 62,728 2,477 63,102 2,503
Disclosure of concentrations	06-30-19 Gross amount in books on the amount of the last appraisal (loan to value) More than More than More than 40% or 60% and 80% and Less than or less than less than less or More than In millions of euros equal to 40% 60% 80% equal to 100% 100% TOTAL Gross amount 16,299 18,919 18,078 5,558 3,874 62,728 - Of which: watchlist /non performing 220 306 454 433 1,064 2,477
Construction and property development
Disclosure of credit risk exposure [line items]
Schedule of exposure to risk	06-30-2019 Excess over collateral Specific Millions of euros Gross Amount value allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 4,131 656 379 Of which: watchlist/ non-performing 955 288 354 Memorandum items: Written-off assets 2,804 — — 06-30-2019 Millions of euros Carrying amount Memorandum items: Total loans and advances to customers excluding the public sector (business in Spain) (book value) 224,086 Total consolidated assets (Total business) (book value) 1,512,096 Impairment losses and provision for exposure classified as normal (business in Spain) 1,221
Disclosure of concentrations	Loans: gross amount Millions of euros 06-30-2019 1. Without mortgage guarantee 288 2. With mortgage guarantee 3,843 2.1 Completed buildings 2,175 2.1.1 Residential 1,073 2.1.2 Other 1,102 2.2 Buildings and other constructions under construction 1,133 2.2.1 Residential 804 2.2.2 Other 329 2.3 Land 535 2.3.1 Developed consolidated land 363 2.3.2 Other land 172 Total 4,131

Additional disclosures (Tables)

Additional disclosures (Tables)	6 Months Ended
	Jun. 30, 2019
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Condensed Balance Sheet [Table Text Block]	UNAUDITED CONDENSED BALANCE SHEETS June 30, 2019 December 31, 2018 (Parent company only) (Millions of Euros) Assets Cash and due from banks 107,566 105,660 Of which: To bank subsidiaries 15,732 16,339 Trading account assets 81,249 70,825 Investment securities 47,575 61,064 Of which: To bank subsidiaries 8,744 11,084 To non-bank subsidiaries 4,306 4,581 Net Loans and leases 276,396 263,142 Of which: To non-bank subsidiaries 29,637 26,505 Investment in affiliated companies 82,596 81,734 Of which: To bank subsidiaries 63,480 69,118 To non-bank subsidiaries 19,116 12,616 Premises and equipment, net 6,389 2,410 Other assets 24,211 23,541 Total assets 625,982 608,376 Liabilities Deposits 364,457 350,786 Of which: To bank subsidiaries 18,668 18,526 To non-bank subsidiaries 16,790 13,655 Short-term debt 36,163 30,883 Long-term debt 68,083 75,600 Total debt 104,246 106,483 Of which: To bank subsidiaries 501 2,874 To non-bank subsidiaries 2,740 998 Other liabilities 89,705 82,340 Total liabilities 558,408 539,609 Stockholders' equity Capital stock 8,118 8,118 Retained earnings and other reserves 59,456 60,649 Total stockholders' equity 67,574 68,767 Total liabilities and Stockholders’ Equity 625,982 608,376
Condensed Income Statement [Table Text Block]	UNAUDITED CONDENSED STATEMENTS OF INCOME Six months ended Six months ended (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) Interest income Interest from earning assets 4,148 2,836 Dividends from affiliated companies 1,735 1,447 Of which: From bank subsidiaries 1,355 957 From non-bank subsidiaries 381 490 5,883 4,283 Interest expense (2,113) (1,586) Interest income / (Charges) 3,770 2,697 Provision for credit losses (544) (209) Interest income / (Charges) after provision for credit losses 3,226 2,488 Non-interest income: 1,805 1,708 Non-interest expense: (4,633) (2,937) Income before income taxes 398 1,259 Income tax expense 145 36 Net income 543 1,295
Condensed Statement of Comprehensive Income [Table Text Block]	UNAUDITED CONDENSED STATEMENTS OF Six months ended Six months ended COMPREHENSIVE INCOME (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) NET INCOME 543 1,295 OTHER COMPREHENSIVE INCOME 15 17 Items that may be reclassified subsequently to profit or loss 179 60 Available-for-sale financial assets: 464 59 Revaluation gains/(losses) 622 188 Amounts transferred to income statement (158) (129) Other reclassifications — — Cash flow hedges: (207) 27 Revaluation gains/(losses) (204) 34 Amounts transferred to income statement (3) (7) 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 (78) (26) Items that will not be reclassified to profit or loss: (164) (43) Actuarial gains/(losses) on pension plans (98) 81 Rest of valuation adjustments (53) (98) Income tax (13) (27) TOTAL COMPREHENSIVE INCOME 558 1,312
Condensed Cash Flow Statement [Table Text Block]	UNAUDITED CONDENSED CASH FLOW STATEMENTS Six months ended Six months ended (Parent company only) June 30, 2019 June 30, 2018 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 543 1,295 Adjustments to profit 1,237 442 Net increase/decrease in operating assets (27,955) (12,498) Net increase/decrease in operating liabilities 16,568 17,519 Reimbursements/payments of income tax 882 555 Total net cash flows from operating activities (1) (8,725) 7,313 2. Cash flows from investing activities Investments (-) (368) (336) Divestments (+) 1,042 586 Total net cash flows from investment activities (2) 674 250 3. Cash flows from financing activities Issuance of own equity instruments - - Disposal of own equity instruments 452 438 Acquisition of own equity instruments (452) (438) Issuance of debt securities 1,056 2,750 Redemption of debt securities (3,471) (763) Dividends paid (2,111) (1,936) Issuance/Redemption of equity instruments - - Other collections/payments related to financing activities (219) - Total net cash flows from financing activities (3) (4,745) 51 4. Effect of exchange rate changes on cash and cash equivalents (4) 38 148 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) (12,758) 7,762 Cash and cash equivalents at beginning of period 51,931 33,734 Cash and cash equivalents at end of period 39,173 41,496
Schedule of preferred shares and securities	June 30, 2019 December 31, 2018 (Millions of Euros) Preference shares 308 345 Preferred securities 7,988 9,717 Total at period-end 8,296 10,063
Schedule of preferred shares and securities by issuer	Outstanding at June 30, 2019 Amount in Preference Shares currency Interest rate Redemption Issuer/Date of issue Currency (million) Option (A) Santander UK plc, October 1995 Pounds Sterling 10.375% No option Santander UK plc, February 1996 Pounds Sterling 10.375% No option Santander UK plc, May 2006 Pounds Sterling 13.8 6.222% (B) May 24, 2019 Santander Bank, National Association, August 2000 US Dollar 153.0 12.00% May 16, 2020 Outstanding at June 30, 2019 Amount in Preferred Securities currency Interest rate Maturity date Issuer/Date of issue Currency (million) 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 Perpetuity Banco Santander, S.A., March 2014 Euro 1,500.0 (C) Perpetuity Banco Santander, S.A., September 2014 Euro 1,500.0 (D) Perpetuity Banco Santander, S.A., April 2017 Euro 750.0 (E) Perpetuity Banco Santander, S.A., September 2017 Euro 1,000.0 (F) Perpetuity Banco Santander, S.A., March 2018 Euro 1,500.0 (G) Perpetuity Banco Santander, S.A., February 2019 US Dollar 1,200.0 (H) 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 Perpetuity Santander Finance Preferred, S.A. (Unipersonal), March 2007 (H) US Dollar 210.4 US3M + 0.52% Perpetuity Santander Finance Preferred, S.A. (Unipersonal), July 2007 Pounds Sterling 4.9 Perpetuity Banco Popular Pastor FRN, June 2004 Euro 11.7 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 6.25% interest rate is set for the first five years. After that, it will be reviewed by applying a margin of 564 basis points on the five-year Mid-Swap Rate. E. Payment is subject to certain conditions and to the discretion of the Bank. The 6.75% 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. F. 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. G. 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 every 5 years applying a margin of 409.7 basis points on the five-year Mid-Swap Rate. H. Payment is subject to certain conditions and to the discretion of the Bank. The 7.50% interest rate is set for the first five years. After that, it will be reviewed every 5 years by applying a margin of 498.9 basis points on the five-year Mid-Swap Rate. I. Listed in the US.

Introduction, Presentation and

Introduction, Presentation and Other Information - Leases (Details) - EUR (€) € in Millions	Dec. 31, 2018	Jun. 30, 2019	Jan. 01, 2019	Jun. 30, 2018	Dec. 31, 2017
Disclosure of initial application of standards or interpretations [line items]
Weighted average lessee's incremental borrowing rate applied to lease liabilities recognised at date of initial application of IFRS 16			4.50%
Operating lease commitments at December 31, 2018	€ 8,699
Amount of operating lease commitments discounted by the Group rate	6,550
Liabilities under financial leases at December 31, 2018	96
Short-term leases recognised as expenses on a straight-line basis	(20)
Low-value leases recognised as expenses on a straight-line basis	(2)
Adjustments resulting from different treatment of extension and termination options	556
Lease liabilities	7,180
Equity	107,361	€ 109,985		€ 104,445	€ 106,833
Increase Decrease Due To Application Of IFRS16 [Member]
Disclosure of initial application of standards or interpretations [line items]
Right-of-use assets	6,665
Financial liabilities.	7,084
Equity	€ (391)
Common Equity Tier One Capital Ratio, Fully Loaded	(0.20%)

Introduction, Presentation, and

Introduction, Presentation, and Other Information - Comparative information (Details)	6 Months Ended
	Jun. 30, 2019
MXN
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	3.08%
Change in average foreign currency exchange rate (as a percent)	6.59%
USD
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	0.62%
Change in average foreign currency exchange rate (as a percent)	7.10%
BRL
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	2.14%
Change in average foreign currency exchange rate (as a percent)	(4.76%)
Argentine peso
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(10.71%)
Change in average foreign currency exchange rate (as a percent)	(44.62%)
GBP
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(0.23%)
Change in average foreign currency exchange rate (as a percent)	0.73%
Chilean peso
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	2.68%
Change in average foreign currency exchange rate (as a percent)	(2.94%)
Polish zloty
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	1.22%
Change in average foreign currency exchange rate (as a percent)	(1.68%)

Introduction, Presentation an_2

Introduction, Presentation and Other Information - Capital Mgmt, Other information (Details)	Mar. 29, 2017
Intro, basis of presentation of the consolidated financial statements and other information
UK Referendum negotiation period	2 years

Santander Group - Reorganizatio

Santander Group - Reorganization of insurance business, etc. (Details) - IFRS Scenario Plan [Member] - EUR (€) € in Millions	Jun. 24, 2019	Jan. 21, 2019
Disclosure of detailed information about business combination [line items]
Payment on agreement termination	€ 936.5
Portion of business acquired by Aegon (as a percent)	51.00%
Portion of business acquired by Mapfre (as a percent)		50.01%

Santander Group - Acquisition o

Santander Group - Acquisition of Banco Santander Mexico (Details) - Banco Santander (Mexico), S.A., Institucion De Banca Multiple, Grupo Financiero Santander Mexico [Member]	Apr. 12, 2019shares
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest not held by entity	25.00%
New shares issuable per acquiree share	0.337
ADS exchange ratio (in shares)	1.685
Potential shares issuable	571,000,000
IFRS Scenario Plan [Member]
Disclosure of detailed information about business combination [line items]
Share capital contributed (as a percent)	3.50%

Santander Group - Agreement wit

Santander Group - Agreement with Credit Agricole (Details)	Apr. 17, 2019
CACEIS Group [Member]
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest not held by entity	69.50%
IFRS Scenario Plan [Member] | SPAIN
Disclosure of detailed information about business combination [line items]
Share capital contributed (as a percent)	100.00%
IFRS Scenario Plan [Member] | CACEIS Group [Member]
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest held following transaction	30.50%
IFRS Scenario Plan [Member] | CACEIS Group [Member] | Latin America
Disclosure of detailed information about business combination [line items]
Share capital contributed (as a percent)	49.99%

Distribution of the Bank's pr_3

Distribution of the Bank's profit, etc. - Distributions (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Shareholder remuneration system and earnings per share
Total remuneration, % of par value	26.00%	24.00%
Dividends paid out of profit, % of par value	13.00%	12.00%
Dividends paid with a charge to reserves or share premium, % of par value	13.00%	12.00%
Total remuneration paid, per share	€ 0.130	€ 0.120
Dividends paid out of profit, per share	0.065	0.060
Dividends paid with a charge to reserves or share premium, per share	€ 0.065	€ 0.060
Dividends paid, ordinary shares	€ 2,110	€ 1,936
Dividends paid out of profit	1,055	968
Dividends paid with a charge to reserves or share premium	€ 1,055	€ 968

Distribution of the Bank's pr_4

Distribution of the Bank's profit, etc. - EPS Basic (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Basic earnings per share [abstract]
Profit (loss), attributable to owners of parent	€ 3,231	€ 3,752
Remuneration of contingently convertible preference shares (CCP) (millions of euros)	(298)	(266)
Net profit for the year	2,933	3,486
Profit or Loss from continuing operations (net of non-controlling interests and CCP) (millions of euros)	€ 2,933	€ 3,486
Weighted average number of shares outstanding	16,231,374,256	16,129,055,793
Total basic earnings (loss) per share	€ 0.180	€ 0.220
Basic earnings per share from continuing operations (euros)	€ 0.180	€ 0.220

Distribution of the Bank's pr_5

Distribution of the Bank's profit, etc. - EPS Diluted (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Diluted earnings per share [abstract]
Profit (loss), attributable to owners of parent	€ 3,231	€ 3,752
Remuneration of contingently convertible preference shares (CCP) (millions of euros)	(298)	(266)
Profit attributable to ordinary equity holders of parent including dilutive effects	2,933	3,486
Profit or Loss from continuing operations (net of non-controlling interests and CCP) (millions of euros)	€ 2,933	€ 3,486
Weighted average number of shares outstanding	16,231,374,256	16,129,055,793
Dilutive effect of options/rights on shares	41,832,881	45,858,082
Adjusted number of shares	16,273,207,137	16,174,913,875
Total diluted earnings (loss) per share	€ 0.180	€ 0.220
Diluted earnings per share from continuing operations (euros)	€ 0.180	€ 0.220

Remuneration and other benefi_3

Remuneration and other benefits paid to the Bank's directors and senior managers (Details) € in Thousands	6 Months Ended
	Jun. 30, 2019EUR (€)employeeitem	Jun. 30, 2018EUR (€)employeeitem
Remuneration of key personnel
Number of persons | item	202,398	201,884
Bank's Directors
Remuneration of key personnel
Fixed salary	€ 3,459	€ 3,759
Directors' fees	579	488
Annual emoluments	1,853	1,785
Other remuneration	3,354	691
Total remuneration	9,245	6,723
Contributions to plan	1,001	1,341
Pension rights	77,153	75,804
Contribution to insurance policies	1,069	862
ELEMENTS NOT USED AFTER THIS POINT IN LR
Sub-total from executive functions	9,245	6,723
Former directors of the bank
Remuneration of key personnel
Pension rights	68,201	79,465
Current senior managers
Remuneration of key personnel
Contributions to plan	3,190	2,739
Pension rights	€ 71,237	€ 62,872
Number of persons | employee	18	18
ELEMENTS NOT USED AFTER THIS POINT IN LR
Sub-total from executive functions	€ 17,690	€ 16,972
Retired senior managers
Remuneration of key personnel
Total remuneration	96	10
Pension rights	166,960	173,819
Loan commitments | Bank's Directors
Remuneration of key personnel
Total direct risk exposure	€ 121	€ 84

Financial assets (Details)

Financial assets (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	€ 102,574	€ 92,879
Non-trading financial assets mandatorily at fair value through profit or loss	5,393	10,730
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	73,420	57,460
Financial assets measured at fair value through other comprehensive income	118,062	121,091
Financial assets at amortised cost	981,046	946,099
Derivatives
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	57,798	55,939
Equity instruments
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	11,133	8,938
Non-trading financial assets mandatorily at fair value through profit or loss	3,367	3,260
Financial assets measured at fair value through other comprehensive income	2,789	2,671
Debt instruments asset
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	33,343	27,800
Non-trading financial assets mandatorily at fair value through profit or loss	1,628	5,587
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	3,496	3,222
Financial assets measured at fair value through other comprehensive income	111,891	116,819
Financial assets at amortised cost	39,382	37,696
Loans and advances
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	300	202
Non-trading financial assets mandatorily at fair value through profit or loss	398	1,883
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	69,924	54,238
Financial assets measured at fair value through other comprehensive income	3,382	1,601
Financial assets at amortised cost	941,664	908,403
Loans and advances - Central banks
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	7,105	9,226
Financial assets at amortised cost	19,450	15,601
Loans and advances - Credit institutions
Disclosure of financial assets [line items]
Non-trading financial assets mandatorily at fair value through profit or loss		2
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	39,810	23,097
Financial assets at amortised cost	41,068	35,480
Loans and advances - Customers
Disclosure of financial assets [line items]
Financial assets at fair value through profit or loss, classified as held for trading	300	202
Non-trading financial assets mandatorily at fair value through profit or loss	398	1,881
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently	23,009	21,915
Financial assets measured at fair value through other comprehensive income	3,382	1,601
Financial assets at amortised cost	€ 881,146	€ 857,322

Financial assets - Gross exposu

Financial assets - Gross exposure by stages of impairment (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	€ 1,119,039	€ 1,087,717
Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	33,146	34,333
Financial instruments purchased credit impaired
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	623	757
Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	51,031	52,301
Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,034,862	1,001,083
Financial assets at fair value through other comprehensive income, category
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	115,284	118,428
Financial assets at fair value through other comprehensive income, category | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	6	6
Financial assets at fair value through other comprehensive income, category | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	115,278	118,422
Financial assets at fair value through other comprehensive income, category | Debt instruments asset
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	111,899	116,825
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	111,899	116,825
Financial assets at fair value through other comprehensive income, category | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	3,385	1,603
Financial assets at fair value through other comprehensive income, category | Loans and advances | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	6	6
Financial assets at fair value through other comprehensive income, category | Loans and advances | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	3,379	1,597
Financial assets at fair value through other comprehensive income, category | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	3,385	1,603
Financial assets at fair value through other comprehensive income, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	6	6
Financial assets at fair value through other comprehensive income, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	3,379	1,597
Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,003,755	969,289
Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets	(23,332)	(23,945)	€ (24,941)	€ (26,656)
Financial assets at amortised cost, category | Financial instruments credit-impaired | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets	(15,110)		(16,131)
Financial assets at amortised cost, category | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	33,146	34,333
Financial assets at amortised cost, category | Financial instruments not credit-impaired [member] | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets	(8,222)		€ (8,810)
Financial assets at amortised cost, category | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	51,025	52,295
Financial assets at amortised cost, category | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	919,584	882,661
Financial assets at amortised cost, category | Debt instruments asset
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	39,979	38,326
Financial assets at amortised cost, category | Debt instruments asset | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	736	870
Financial assets at amortised cost, category | Debt instruments asset | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	114	117
Financial assets at amortised cost, category | Debt instruments asset | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	39,129	37,339
Financial assets at amortised cost, category | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	963,776	930,963
Financial assets at amortised cost, category | Loans and advances | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	32,410	33,463
Financial assets at amortised cost, category | Loans and advances | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	50,911	52,178
Financial assets at amortised cost, category | Loans and advances | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	880,455	845,322
Financial assets at amortised cost, category | Loans and advances - Central banks
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	19,450	15,601
Financial assets at amortised cost, category | Loans and advances - Central banks | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	19,450	15,601
Financial assets at amortised cost, category | Loans and advances - Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	41,082	35,492
Financial assets at amortised cost, category | Loans and advances - Credit institutions | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1	2
Financial assets at amortised cost, category | Loans and advances - Credit institutions | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk		1
Financial assets at amortised cost, category | Loans and advances - Credit institutions | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	41,081	35,489
Financial assets at amortised cost, category | Loans and advances - Customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	903,244	879,870
Financial assets at amortised cost, category | Loans and advances - Customers | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets	(22,723)	(23,307)
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	32,409	33,461
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
Financial assets	(14,529)	(14,906)
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Lifetime Expected Credit Losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	50,911	52,177
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
Financial assets	(4,359)	(4,743)
Financial assets at amortised cost, category | Loans and advances - Customers | Financial instruments not credit-impaired [member] | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	819,924	794,232
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
Financial assets	€ (3,835)	€ (3,658)

Financial assets - Movement in

Financial assets - Movement in provisions that cover impairment losses (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of reconciliation of changes in loss allowance of financial instruments
Recorded impairment, net of recoveries	€ 4,368
Impairment loss on financial assets		€ 4,352
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	5,199	5,174
Impairment losses charged to income	9,697	9,042
Impairment losses reversed with a credit to income	(4,498)	(3,868)
Write-off of impaired assets against recorded allowance	(6,246)	(6,140)
Exchange differences and other	434	(749)
Previously written-off assets recovered	837	823
Recorded impairment, net of recoveries	4,362
Impairment loss on financial assets		4,351
Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at beginning of period	(23,945)	(26,656)
Financial assets at end of period	(23,332)	(24,941)
Financial instruments credit-impaired | Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at end of period	(15,110)	(16,131)
Financial instruments not credit-impaired [member] | Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at end of period	(8,222)	(8,810)
Expected credit losses individually assessed [member] | Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at end of period	(4,983)	(6,146)
Expected credit losses collectively assessed [member] | Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at end of period	€ (18,349)	€ (18,795)

Financial assets - Movement of

Financial assets - Movement of loss provision by impairment stage (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9	€ 4,368
Impairment losses (preIFRS9)		€ 4,352
Financial assets at amortised cost, category
Disclosure of reconciliation of changes in loss allowance of financial instruments
Exchange differences and other	434	(749)
Gain on recovery of loans and advances previously written off	837	823
Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9	4,362
Impairment losses (preIFRS9)		4,351
Financial assets at amortised cost, category | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at beginning of year	23,945	26,656
Impairment at end of year	23,332	24,941
Financial assets at amortised cost, category | Financial instruments credit-impaired | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at end of year	15,110	16,131
Financial assets at amortised cost, category | Financial instruments not credit-impaired [member] | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment at end of year	8,222	€ 8,810
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	23,307
Transfer from Stage 2 to Stage 1	2,472
Net exposure changes and modifications in the credit risk	2,756
Write-off of impaired balances against recorded impairment allowance	(6,246)
Exchange differences and other	434
Impairment at end of year	22,723
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	14,906
Transfer from Stage 2 to Stage 1	3,160
Net exposure changes and modifications in the credit risk	2,419
Write-off of impaired balances against recorded impairment allowance	(6,246)
Exchange differences and other	290
Impairment at end of year	14,529
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	3,658
Transfer from Stage 2 to Stage 1	(442)
Net exposure changes and modifications in the credit risk	673
Exchange differences and other	(54)
Impairment at end of year	3,835
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	4,743
Transfer from Stage 2 to Stage 1	(246)
Net exposure changes and modifications in the credit risk	(336)
Exchange differences and other	198
Impairment at end of year	€ 4,359

Financial assets - Impaired ass

Financial assets - Impaired assets (Details) - Financial assets at amortised cost, category - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]
Written-off assets	€ (6,246)	€ (6,140)
Exchange differences and other	(434)	749
Gross carrying amount | 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	35,091	37,275
Additions	4,581	5,070
Written-off assets	(6,246)	(6,140)
Exchange differences and other	343	(267)
Financial assets at end of period	€ 33,769	€ 35,938

Financial assets - Guarantees r

Financial assets - Guarantees received (Details) - Financial assets at amortised cost, category - Financial instruments credit-impaired - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of financial assets that are either past due or impaired [line items]
Real guarantees value	€ 509,859	€ 460,674
Other guarantees	29,298	36,727
Total value of guarantees received	539,157	497,401
Nonperforming
Disclosure of financial assets that are either past due or impaired [line items]
Real guarantees value	12,080	13,566
Other guarantees	€ 558	€ 1,131

Other disclosures - Fair value

Other disclosures - Fair value of financial assets not at fair value (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
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	€ 981,046	€ 946,099
Financial assets at fair value	992,682	952,108
Level 2
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	153,100	140,659
Level 3
Disclosure of fair value measurement of assets [line items]
Financial assets at fair value	7,333	4,473
Loans and advances | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	941,664	908,403
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	952,624	914,013
Loans and advances - Central banks | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	19,450	15,601
Loans and advances - Central banks | 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	19,450	15,610
Loans and advances - Credit institutions | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	41,068	35,480
Loans and advances - Credit institutions | 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	41,309	35,833
Loans and advances - Customers | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	881,146	857,322
Loans and advances - Customers | 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	891,865	862,570
Debt instruments asset | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	39,382	37,696
Debt instruments asset | 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	€ 40,058	€ 38,095

Non-current assets (Details)

Non-current assets (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	€ 33,755	€ 26,157
Other assets	12,140	9,348
Total non-current assets held for sale	4,535	€ 5,426
Non-current assets held for sale [member]
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	4,535		€ 5,424
Other assets			2
Total non-current assets held for sale	4,535		5,426
Non-current assets held for sale [member] | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	4,450		5,334
Non-current assets held for sale [member] | Other assets Member
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	85		90
Non-current assets held for sale [member] | SPAIN | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
TANGIBLE ASSETS	€ 3,606		€ 4,488

Non-current assets - Allowances

Non-current assets - Allowances and other information (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Gains Or Losses On Assets Held For Sale [Line Items]
Proceeds from sale of assets held for sale	€ 1,593	€ 8,602
Tangible assets.	33,755		€ 26,157
Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
Losses on disposals of non-current assets	€ 180
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%		49.00%
Net charges recorded against valuation allowances	€ 160	159
Recoveries	32	13
Tangible assets.	4,535	5,424
Non-current assets held for sale [member] | Foreclosed assets
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets.	4,450	5,334
Non-current assets held for sale [member] | Other assets Member
Gains Or Losses On Assets Held For Sale [Line Items]
Tangible assets.	€ 85	€ 90

Tangible Asset (Details)

Tangible Asset (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Tangible assets
Acquisitions through business combinations, property, plant and equipment	€ 4,053	€ 4,926
Disposals, property, plant and equipment	1,004	2,441
Gains (losses) on disposals of property, plant and equipment	30	18
Impairment loss on tangible assets	€ 19	€ 33

Intangible assets (Details)

Intangible assets (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of information for cash-generating units [line items]
Goodwill	€ 25,613	€ 25,466
Decrease through exchange differences	(147)
Impairment loss recognised in profit or loss, goodwill	0
Grupo Santander UK
Disclosure of information for cash-generating units [line items]
Goodwill	8,288	8,307
Banco Santander (Brasil) S.A
Disclosure of information for cash-generating units [line items]
Goodwill	4,554	4,459
Santander Bank Polska SA [Member]
Disclosure of information for cash-generating units [line items]
Goodwill	2,431	2,402
Santander Consumer USA Holdings Inc.
Disclosure of information for cash-generating units [line items]
Goodwill	2,115	2,102
Santander Bank, National Association
Disclosure of information for cash-generating units [line items]
Goodwill	1,804	1,793
Santander Consumer Germany
Disclosure of information for cash-generating units [line items]
Goodwill	1,217	1,217
Santander Asset Management [Member]
Disclosure of information for cash-generating units [line items]
Goodwill	1,173	1,173
Santander Portugal [Member]
Disclosure of information for cash-generating units [line items]
Goodwill	1,040	1,040
Santander Espana [Member]
Disclosure of information for cash-generating units [line items]
Goodwill	1,023	1,023
Banco Santander - Chile
Disclosure of information for cash-generating units [line items]
Goodwill	644	627
Santander Consumer Bank (Nordics)
Disclosure of information for cash-generating units [line items]
Goodwill	494	502
Banco Santander S.A. (Mexico)
Disclosure of information for cash-generating units [line items]
Goodwill	448	434
Other cash-generating companies
Disclosure of information for cash-generating units [line items]
Goodwill	€ 382	€ 387

Financial liabilities - Summary

Financial liabilities - Summary and Movement (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Disclosure of financial liabilities [line items]
Financial liabilities held for trading			€ 74,187	€ 70,343
Financial liabilities designated at fair value through profit or loss			60,237	68,058
Financial liabilities at amortised cost			1,224,194	1,171,630
Derivatives
Disclosure of financial liabilities [line items]
Financial liabilities held for trading			58,341	55,341
Short positions
Disclosure of financial liabilities [line items]
Financial liabilities held for trading			15,846	15,002
Deposits
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			56,990	65,304
Financial liabilities at amortised cost			937,710	903,101
Deposits - Central banks
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			8,836	14,816
Financial liabilities at amortised cost			71,778	72,523
Deposits - Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			10,305	10,891
Financial liabilities at amortised cost			89,030	89,679
Deposits - Customers
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			37,849	39,597
Financial liabilities at amortised cost			776,902	740,899
Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			3,117	2,305
Financial liabilities at amortised cost			251,672	244,314
Financial liabilities	€ 246,619		254,789	246,619
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	246,619
Balance at year-end	254,789
Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities designated at fair value through profit or loss			130	449
Financial liabilities at amortised cost			34,812	24,215
Bonds And Debentures And Subordinated Liabilities [Member]
Disclosure of financial liabilities [line items]
Financial liabilities	219,174	€ 198,101	223,741	219,174
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	219,174	198,101
Issues	33,161	38,944
Repurchases or redemptions	(30,215)	(29,725)
Exchange rate and other adjustments	1,621	(676)
Balance at year-end	223,741	206,644
Bonds And Debentures [Member]
Disclosure of financial liabilities [line items]
Financial liabilities	195,498	176,719	202,464	195,498
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	195,498	176,719
Issues	32,105	35,957
Repurchases or redemptions	(26,713)	(29,081)
Exchange rate and other adjustments	1,574	(765)
Balance at year-end	202,464	182,830
Bonds And Debentures [Member] | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	195,498		202,464	195,498
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	195,498
Balance at year-end	202,464
Subordinated liabilities
Disclosure of financial liabilities [line items]
Financial liabilities	23,676	21,382	21,277	23,676
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	23,676	21,382
Issues	1,056	2,987
Repurchases or redemptions	(3,502)	(644)
Exchange rate and other adjustments	47	89
Balance at year-end	21,277	€ 23,814
Subordinated liabilities | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	23,676		21,277	23,676
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	23,676
Balance at year-end	21,277
Promissory Notes And Other Securities [Member] | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	27,445		31,048	27,445
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	27,445
Balance at year-end	31,048
Carrying amount
Disclosure of financial liabilities [line items]
Financial liabilities	1,171,630		1,224,194	1,171,630
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	1,171,630
Balance at year-end	1,224,194
Carrying amount | Deposits
Disclosure of financial liabilities [line items]
Financial liabilities	903,101		937,710	903,101
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	903,101
Balance at year-end	937,710
Carrying amount | Deposits - Central banks
Disclosure of financial liabilities [line items]
Financial liabilities	72,523		71,778	72,523
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	72,523
Balance at year-end	71,778
Carrying amount | Deposits - Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities	89,679		89,030	89,679
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	89,679
Balance at year-end	89,030
Carrying amount | Deposits - Customers
Disclosure of financial liabilities [line items]
Financial liabilities	740,899		776,902	740,899
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	740,899
Balance at year-end	776,902
Carrying amount | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	244,314		251,672	244,314
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	244,314
Balance at year-end	251,672
Carrying amount | Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities	24,215		€ 34,812	€ 24,215
Reconciliation of changes in fair value measurement, liabilities [abstract]
Balance at beginning of year	24,215
Balance at year-end	€ 34,812

Financial liabilities - Prefere

Financial liabilities - Preference shares (Details) € in Millions, $ in Millions	1 Months Ended		6 Months Ended
	Feb. 28, 2019USD ($)	Mar. 31, 2018EUR (€)	Jun. 30, 2019EUR (€)	Apr. 16, 2019USD ($)	Apr. 16, 2019EUR (€)	Feb. 28, 2019EUR (€)	Dec. 31, 2018EUR (€)
Disclosure of detailed information about financial instruments [line items]
Notional amount			€ 8,118				€ 8,118
Issuance By Banco Santander S.A. In March 2018 [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amount		€ 1,500
Interest rate (as a percent)		4.75%
Initial interest rate term		7 years
Reprice term		5 years
Reference rate		5-year Mid-Swap Rate
Issuance By Banco Santander S.A. 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%
Issuance By Banco Santander S.A. In February 2019 [Member]
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	7.50%					7.50%
Initial interest rate term	5 years		5 years
Reprice term	5 years		5 years
Reference rate	5-year Mid-Swap Rate		5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In February 2019 [Member] | CCPSs
Disclosure of detailed information about financial instruments [line items]
Notional amount	$ 1,200					€ 1,056
Issuance By Banco Santander S.A. In February 2019 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.989%		4.989%			4.989%
Issuance By Banco Santander S.A. In 2014 [Member]
Disclosure of detailed information about financial instruments [line items]
Notional amount				$ 1,500	€ 1,345

Financial liabilities - Not at

Financial liabilities - Not at fair value (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	€ 1,224,194	€ 1,171,630
Deposits
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	937,710	903,101
Deposits - Central banks
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	71,778	72,523
Deposits - Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	89,030	89,679
Deposits - Customers
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	776,902	740,899
Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	254,789	246,619
Financial liabilities at amortised cost	251,672	244,314
Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities at amortised cost	34,812	24,215
Carrying amount
Disclosure of financial liabilities [line items]
Financial liabilities	1,224,194	1,171,630
Carrying amount | Deposits
Disclosure of financial liabilities [line items]
Financial liabilities	937,710	903,101
Carrying amount | Deposits - Central banks
Disclosure of financial liabilities [line items]
Financial liabilities	71,778	72,523
Carrying amount | Deposits - Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities	89,030	89,679
Carrying amount | Deposits - Customers
Disclosure of financial liabilities [line items]
Financial liabilities	776,902	740,899
Carrying amount | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities	251,672	244,314
Carrying amount | Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities	34,812	24,215
Not measured at fair value in statement of financial position but for which fair value is disclosed
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	1,231,236	1,173,906
Not measured at fair value in statement of financial position but for which fair value is disclosed | Deposits
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	937,371	902,680
Not measured at fair value in statement of financial position but for which fair value is disclosed | Deposits - Central banks
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	71,362	72,039
Not measured at fair value in statement of financial position but for which fair value is disclosed | Deposits - Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	89,078	89,662
Not measured at fair value in statement of financial position but for which fair value is disclosed | Deposits - Customers
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	776,931	740,979
Not measured at fair value in statement of financial position but for which fair value is disclosed | Debt instruments liability
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	259,005	247,029
Not measured at fair value in statement of financial position but for which fair value is disclosed | Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities at fair value	€ 34,860	€ 24,197

Provisions (Details)

Provisions (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of provision matrix [line items]
Provisions	€ 14,571	€ 13,225
Banco Popular Espanol, S.A.
Disclosure of provision matrix [line items]
Use of the available provisions	40
Other combined provisions
Disclosure of provision matrix [line items]
Provisions	5,919	5,649
Provisions for taxes
Disclosure of provision matrix [line items]
Provisions	831	864
Provisions for other legal proceedings
Disclosure of provision matrix [line items]
Provisions	1,477	1,451
Provision for customer remediation
Disclosure of provision matrix [line items]
Provisions	689	652
Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Provisions	83	105
Provision for restructuring
Disclosure of provision matrix [line items]
Provisions	689	492
Other
Disclosure of provision matrix [line items]
Provisions	1,305	1,226
SPAIN | Provisions for employment-related proceedings
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	615
SPAIN | Provision for restructuring
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	242
Use of the available provisions	92
BRAZIL | Provisions for employment-related proceedings
Disclosure of provision matrix [line items]
Provisions	845	€ 859
Additional provisions charged to income statement	85
Use of the available provisions	134
BRAZIL | Provisions for other legal proceedings
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	73
Use of the available provisions	90
UK | Provision for customer remediation
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	80
Use of the available provisions	78
UK | Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Use of the available provisions	48
UK | Provision for restructuring
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	124
Use of the available provisions	30
PUERTO RICO | Provision for customer remediation
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	47
Use of the available provisions	21
POLAND | Regulatory Framework-Related Provisions
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	61
POLAND | Provision for restructuring
Disclosure of provision matrix [line items]
Additional provisions charged to income statement	22
Use of the available provisions	€ 13

Provisions - Litigation and oth

Provisions - Litigation and other matters (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of provision matrix [line items]
Provisions	€ 14,571	€ 13,225
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. And Other Group Companies In Brazil | Legal Case Relating To Involved In Administrative And Legal Proceedings Against Several Municipalities
Disclosure of provision matrix [line items]
Provisions	0
Banco Santander (Brasil) S.A. And Other Group Companies In Brazil | Legal Case Relating To Tax Deductibility Of Amortization Of Goodwill Arising On Acquisition [Member]
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
Other combined provisions
Disclosure of provision matrix [line items]
Provisions	5,919	5,649
Provisions for taxes
Disclosure of provision matrix [line items]
Provisions	€ 831	€ 864

Provisions - Non-tax-related pr

Provisions - Non-tax-related proceedings (Details) £ in Millions, zł in Millions	Feb. 13, 2018EUR (€)item	Nov. 30, 2018	Feb. 28, 2017EUR (€)	Jun. 30, 2019PLN (zł)item	Jun. 30, 2019GBP (£)item	Jun. 30, 2019EUR (€)item	Dec. 31, 2018EUR (€)	Dec. 31, 2017EUR (€)	Dec. 31, 2018EUR (€)	Jun. 30, 2019EUR (€)
Disclosure of provision matrix [line items]
Provisions							€ 13,225,000,000		€ 13,225,000,000	€ 14,571,000,000
Number Of State Attorneys General Represented By Executive Committee			32
Arbitration Cases Received FINRA | item				670	670	670
Arbitration Cases Pending FINRA | item				433	433	433
Banco Popular Espanol, S.A.
Disclosure of provision matrix [line items]
Provision used, other provisions						€ 40,000,000
"Planos Econmicos"
Disclosure of provision matrix [line items]
Period Of Suspension Of Economic Plan Processes		2 years
Delforca Case To Request Court Judgment On The Validity Of The Swaps
Disclosure of provision matrix [line items]
Arbitration Matter, Amount Claimed By Entity						66,000,000
Arbitration Matter, Amount Claimed By Counterparty						56,800,000
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	€ 91,000,000
Fine imposed, Santander portion	23,900,000
Floor Clauses
Disclosure of provision matrix [line items]
Provisions										85,000,000
Extraordinary provision used						39,000,000	119,000,000	€ 238,000,000	396,000,000
Maximum risk	€ 900,000,000
IRPH Index [Member]
Disclosure of provision matrix [line items]
Maximum risk						4,300,000,000
CEO Functions Contract [Member]
Disclosure of provision matrix [line items]
Arbitration Matter, Amount Claimed By Entity						112,000,000
CHF Polish Mortgage Loans Ruling [Member]
Disclosure of provision matrix [line items]
Maximum risk				zł 10,116		2,380,000,000
Other combined provisions
Disclosure of provision matrix [line items]
Provisions							5,649,000,000		5,649,000,000	5,919,000,000
Provision for customer remediation
Disclosure of provision matrix [line items]
Provisions							€ 652,000,000		€ 652,000,000	689,000,000
Provision For Customer Remediation PPI Redress And Related Costs
Disclosure of provision matrix [line items]
Provisions					£ 247.9					€ 277,000,000
Additional provisions charged to income statement					£ 70	€ 80,000,000

Equity (Details)

Equity (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Shareholders' equity
Number of shares outstanding	16,236,573,942	16,236,573,942
Issued capital	€ 8,118	€ 8,118
Notional amount	€ 8,118	€ 8,118

Other comprehensive income - AO

Other comprehensive income - AOCI components (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of analysis of other comprehensive income by item [line items]
OTHER ACCUMULATED COMPREHENSIVE INCOME	€ (21,425)	€ (22,141)
ITEMS THAT WILL NOT BE RECLASSIFIED TO PROFIT OR LOSS:	(3,625)	(2,936)
Actuarial gains or losses on defined benefit pension plans	(4,141)	(3,609)
Other recognized income and expense of investments in subsidiaries, joint ventures and associates, not reclassified	1	1
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	527	597
Reserve of gains and losses on hedging instruments that hedge investments in equity instruments	(5,074)	(4,312)
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(12)	75
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS:	(17,800)	(19,205)
Hedge of net investments in foreign operations (effective portion)	(5,074)	(4,312)
Exchange differences	(14,927)	(15,730)
Hedging derivatives. Cash flow hedges (effective portion)	393	277
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	2,051	828
Share in other income and expenses recognized in investments in joint ventures and associates	(243)	(268)
Equity instruments
Disclosure of analysis of other comprehensive income by item [line items]
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	€ 527	€ 597

Other comprehensive income - It

Other comprehensive income - Items not reclassified: benefit plans (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Items not reclassified to profit or loss
Decrease in benefit liability from remeasurement	€ 833
Inflation rates	7.72%
SPAIN
Items not reclassified to profit or loss
Discount rates	1.10%	1.55%
UK
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ 314
Inflation rates	7.72%
BRAZIL | Pension defined benefit plans [member]
Items not reclassified to profit or loss
Discount rates	7.72%	9.11%
BRAZIL | Post-employment medical defined benefit plans [member]
Items not reclassified to profit or loss
Discount rates	7.86%	9.26%
United Kingdom and Brazil
Items not reclassified to profit or loss
Discount rates	2.35%	2.90%
Discount rate actuarial assumptions | SPAIN
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ 161
Discount rate actuarial assumptions | BRAZIL
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	304
Discount rate actuarial assumptions | Other Regions [Member]
Items not reclassified to profit or loss
Increase (decrease) in accumulated actuarial losses/profits	€ 54

Other comprehensive income - _2

Other comprehensive income - Items not reclassified: equity instruments (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of analysis of other comprehensive income by item [line items]
Net revaluation gains (losses)	€ 527	€ 597
Equity instruments
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	1,052	897
Revaluation losses	(525)	(300)
Net revaluation gains (losses)	527	597
Fair value	2,789	2,671
Domestic | SPAIN
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	19	20
Revaluation losses	(444)	(216)
Net revaluation gains (losses)	(425)	(196)
Fair value	185	417
International | Rest of Europe
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	60	160
Revaluation losses	(78)	(76)
Net revaluation gains (losses)	(18)	84
Fair value	319	652
International | UNITED STATES
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	13	9
Net revaluation gains (losses)	13	9
Fair value	45	42
International | Latin America and rest of the world
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	960	708
Revaluation losses	(3)	(8)
Net revaluation gains (losses)	957	700
Fair value	2,240	1,560
Listed
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	961	818
Revaluation losses	(15)	(18)
Net revaluation gains (losses)	946	800
Fair value	2,289	1,943
Unlisted
Disclosure of analysis of other comprehensive income by item [line items]
Revaluation gains	91	79
Revaluation losses	(510)	(282)
Net revaluation gains (losses)	(419)	(203)
Fair value	€ 500	€ 728

Other comprehensive income - _3

Other comprehensive income - Items may be reclassified: debt and equity instruments (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of analysis of other comprehensive income by item [line items]
Gain from revaluation of goodwill	€ 144
Financial assets at fair value through other comprehensive income [abstract]
Net revaluation gains/(losses)	2,051	€ 828
Financial assets at fair value through comprehensive income	118,062	121,091
Impairment loss (reversal)	4,368
Debt Securities Plus Loans And Advances [Member]
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	2,191
Revaluation losses	(140)
Net revaluation gains/(losses)	2,051
Financial assets at fair value through comprehensive income	115,273
Revaluation gains		1,181
Revaluation losses		(353)
Net revaluation gains/(losses)		828
Financial assets available-for-sale		118,420
Government debt securities and debt instruments issued by central banks | SPAIN
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	717
Revaluation losses	(4)
Net revaluation gains/(losses)	713
Financial assets at fair value through comprehensive income	29,002
Revaluation gains		323
Revaluation losses		(3)
Net revaluation gains/(losses)		320
Financial assets available-for-sale		38,550
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	679
Revaluation losses	(32)
Net revaluation gains/(losses)	647
Financial assets at fair value through comprehensive income	20,039
Revaluation gains		373
Revaluation losses		(55)
Net revaluation gains/(losses)		318
Financial assets available-for-sale		17,494
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	715
Revaluation losses	(42)
Net revaluation gains/(losses)	673
Financial assets at fair value through comprehensive income	44,820
Revaluation gains		448
Revaluation losses		(117)
Net revaluation gains/(losses)		331
Financial assets available-for-sale		42,599
Private-sector debt securities
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	80
Revaluation losses	(62)
Net revaluation gains/(losses)	18
Financial assets at fair value through comprehensive income	21,412
Revaluation gains		37
Revaluation losses		(178)
Net revaluation gains/(losses)		(141)
Financial assets available-for-sale		19,777
Debt instruments asset
Financial assets at fair value through other comprehensive income [abstract]
Financial assets at fair value through comprehensive income	111,891	116,819
Equity instruments
Financial assets at fair value through other comprehensive income [abstract]
Financial assets at fair value through comprehensive income	2,789	€ 2,671
Financial assets at fair value through other comprehensive income, category
Financial assets at fair value through other comprehensive income [abstract]
Impairment loss (reversal)	€ 6

Segment information (Details)

Segment information (Details) € in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2019EUR (€)	Jun. 30, 2018EUR (€)	Dec. 31, 2018segment
Geographical segments
Number of operating segments | segment			5
Number of operating areas | segment			4
Revenue	€ 39,338	€ 38,956
Profit attributable to the parent	3,231	3,752
Operating profit / (loss) before tax	6,531	6,899
Gains or losses on non-current assets held for sale not classified as discontinued operations	(257)	(94)
Provisions or reversal of provisions, net	(1,916)	(1,262)
Income tax and/or profit from discontinued operations	2,449	2,378
Operating segment
Geographical segments
Revenue	39,338	38,956
Profit attributable to the parent	4,045	4,052
Operating profit / (loss) before tax	7,579	7,480
Intra-Group eliminations
Geographical segments
Profit attributable to the parent	(814)	(300)
Operating profit / (loss) before tax	(1,048)	(581)
Gains (losses) on disposals of investments	150
Gains or losses on non-current assets held for sale not classified as discontinued operations	(180)
Intra-Group eliminations | Provision for restructuring
Geographical segments
Provisions or reversal of provisions, net	(704)	(300)
Intra-Group eliminations | Provision For Customer Remediation PPI Redress And Related Costs
Geographical segments
Provisions or reversal of provisions, net	(80)
Intra-Group eliminations | SPAIN | Provision for restructuring
Geographical segments
Provisions or reversal of provisions, net		(280)
Intra-Group eliminations | PORTUGAL | Provision for restructuring
Geographical segments
Provisions or reversal of provisions, net		20
Europe Segment [Member] | Operating segment
Geographical segments
Revenue	16,190	16,406
Profit attributable to the parent	2,354	2,422
Operating profit / (loss) before tax	3,549	3,610
South America Segment [Member] | Operating segment
Geographical segments
Revenue	14,420	15,497
Profit attributable to the parent	1,961	690
Operating profit / (loss) before tax	3,661	1,265
North America Segment [Member] | Operating segment
Geographical segments
Revenue	8,768	7,179
Profit attributable to the parent	889	1,846
Operating profit / (loss) before tax	1,594	3,499
Santander Global Platform Segment [Member] | Operating segment
Geographical segments
Revenue	61	52
Profit attributable to the parent	(51)	(23)
Operating profit / (loss) before tax	(70)	(29)
Corporate center | Operating segment
Geographical segments
Revenue	(101)	(178)
Profit attributable to the parent	(1,108)	(883)
Operating profit / (loss) before tax	€ (1,155)	(865)
Corporate center | Intra-Group eliminations | Provision for restructuring
Geographical segments
Provisions or reversal of provisions, net		€ (40)

Related party transactions (Det

Related party transactions (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Related Party Expenses [Abstract]
Finance costs	€ 1	€ 2
Other expenses	13	47
Total expenses	14	49
Related Party Income [Abstract]
Finance income	46	39
Other income	490	451
Total income	536	490
Related Party Other Transactions [Abstract]
Financing agreements: loans and capital contributions (lender)	611	161
Financing agreements: loans and capital contributions (borrower)	301	86
Guarantees provided		31
Guarantees received	(21)
Commitments acquired	51	73
Dividends and other distributed profit	25	22
Other transactions		229
Outstanding balances for related party transactions [abstract]
Loans and credits granted	7,773
Other collection rights	532
Debit balances	8,305
Loans and credits received	2,334
Other payment obligations	42
Credit balances	2,376
Bank's directors and senior managers
Related Party Other Transactions [Abstract]
Financing agreements: loans and capital contributions (lender)		1
Financing agreements: loans and capital contributions (borrower)		2
Dividends and other distributed profit	5	4
Outstanding balances for related party transactions [abstract]
Loans and credits granted	24
Debit balances	24
Loans and credits received	35
Credit balances	35
Individuals, Group companies or entities
Related Party Expenses [Abstract]
Finance costs	1	1
Other expenses	13	47
Total expenses	14	48
Related Party Income [Abstract]
Finance income	46	33
Other income	490	437
Total income	536	470
Related Party Other Transactions [Abstract]
Financing agreements: loans and capital contributions (lender)	617	324
Financing agreements: loans and capital contributions (borrower)	289	(251)
Guarantees received	(21)
Commitments acquired	75	75
Other transactions		9
Outstanding balances for related party transactions [abstract]
Loans and credits granted	7,688
Other collection rights	515
Debit balances	8,203
Loans and credits received	2,222
Other payment obligations	42
Credit balances	2,264
Other related parties [member]
Related Party Expenses [Abstract]
Finance costs		1
Total expenses		1
Related Party Income [Abstract]
Finance income		6
Other income		14
Total income		20
Related Party Other Transactions [Abstract]
Financing agreements: loans and capital contributions (lender)	(6)	(164)
Financing agreements: loans and capital contributions (borrower)	12	335
Guarantees provided		31
Commitments made	(24)	(2)
Dividends and other distributed profit	20	18
Other transactions		€ 220
Outstanding balances for related party transactions [abstract]
Loans and credits granted	61
Other collection rights	17
Debit balances	78
Loans and credits received	77
Credit balances	€ 77

Off-balance-sheet exposures (De

Off-balance-sheet exposures (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Loan commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	€ 223,954	€ 218,083
Financial Guarantees
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	12,077	11,723
Bank Sureties Granted [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	12,004	11,558
Credit derivatives sold
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	73	165
Other Commitments [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	94,785	74,389
Other Granted Guarantees [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	33,447	35,154
Other contingent commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	61,338	39,235
Financial instruments credit-impaired | Loan commitments
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	339	298
Financial instruments credit-impaired | Financial Guarantees
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	161	181
Financial instruments credit-impaired | Other Granted Guarantees [Member]
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments and financial guarantee contracts	889	983
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	1,389	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	5,927	5,324
Provision for contingent liabilities and commitments | Financial instruments credit-impaired | Lifetime Expected Credit Losses
Disclosure of contingent liabilities [line items]
Other provisions	212	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	137	132
Provision for contingent liabilities and commitments | 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	323,500	297,409
Other provisions	€ 379	€ 382

Average headcount and number _3

Average headcount and number of offices - Headcount (Details) - item	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Number of employees
Number of employees	202,398	201,884
Number of employees - men	91,609	91,051
Number of employees - women	110,789	110,833
The Bank Personnel
Number of employees
Number of employees	29,979	21,491
Number of employees - men	16,240	11,585
Number of employees - women	13,739	9,906

Average headcount and number _4

Average headcount and number of offices - Number of offices (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2019Office	Dec. 31, 2018OfficeEUR (€)
Disclosure of geographical areas [line items]
Number of offices	13,081	13,217
SPAIN
Disclosure of geographical areas [line items]
Number of offices	4,296	4,427
Abroad
Disclosure of geographical areas [line items]
Number of offices	8,785	8,790

Accounting policies - Valuation

Accounting policies - Valuation techniques (Details) € in Millions	Jun. 30, 2019EUR (€)division	Dec. 31, 2018EUR (€)
Disclosure of detailed information about financial instruments [line items]
Number of independent divisions | division	2
Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	€ 153,100	€ 140,659
Financial liabilities, at fair value	123,600	127,991
Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	7,333	4,473
Financial liabilities, at fair value	606	442
Financial liabilities held for trading | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	257	289
Financial liabilities designated at fair value through profit or loss | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	347	147
Hedging derivatives, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	2	6
Financial assets held for trading, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	603	738
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,951	1,403
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Level 3 | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	612	462
Financial assets designated at fair value through profit or loss, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,017	876
Financial assets at fair value through other comprehensive income, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	3,754	1,435
Hedging derivatives, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8	21
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	74,187	70,343
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	16,861	16,104
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	57,326	54,239
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	57,069	53,950
Financial Assets And Liabilities Category [Member] | Financial liabilities held for trading | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	257	289
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	60,237	68,058
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	1,350	987
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	58,887	67,071
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	58,540	66,924
Financial Assets And Liabilities Category [Member] | Financial liabilities designated at fair value through profit or loss | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	347	147
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	7,267	6,363
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	5
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	7,262	6,358
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	7,260	6,352
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	2	6
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	102,574	92,879
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	44,404	37,108
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	58,170	55,771
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	57,567	55,033
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	603	738
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	5,393	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	1,695	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	3,698	8,895
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
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,747	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 2 | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,083	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] | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,951	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] | Level 3 | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	612	462
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	73,420	57,460
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	2,739	3,102
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	70,681	54,358
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	69,664	53,482
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	1,017	876
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	118,062	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	98,629	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	19,433	17,501
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	15,679	16,066
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 2 | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	122	455
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	3,754	1,435
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Level 3 | Equity instruments
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	346	581
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8,451	8,607
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	8,451	8,607
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8,443	8,586
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Level 3
Disclosure of detailed information about financial instruments [line items]
Financial assets, at fair value	8	21
Liabilities Under Insurance Contracts [Member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	731	765
Liabilities Under Insurance Contracts [Member] | Level 2 and 3
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	731	765
Liabilities Under Insurance Contracts [Member] | Level 2
Disclosure of detailed information about financial instruments [line items]
Financial liabilities, at fair value	€ 731	€ 765

Accounting policies - Credit an

Accounting policies - Credit and debt valuation adjustments (CVA, DVA) (Details) € in Millions	6 Months Ended
	Jun. 30, 2019EUR (€)
Disclosure of detailed information about financial instruments [line items]
Amount of CVA	€ 302.2
Change in CVA (as a percent)	(13.90%)
Amount of DVA	€ 192.5
Change in DVA (as a percent)	(26.20%)
Minimum
Disclosure of detailed information about financial instruments [line items]
Credit spread change (as a percent)	30.00%

Accounting policies - Valuati_2

Accounting policies - Valuation adjustments due to model risk (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	€ 153,100	€ 140,659
Financial liabilities, at fair value	123,600	127,991
Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	7,333	4,473
Financial liabilities, at fair value	606	442
Financial liabilities held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	257	289
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	257	289
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	110	111
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
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	32	26
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	105	143
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	10	2
Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	2	6
Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value		6
Hedging derivatives, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	2
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	347	147
Hedging derivatives, category | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8	21
Hedging derivatives, category | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value		21
Hedging derivatives, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8
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	1,951	1,403
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	386	460
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments asset | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	953	481
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	612	462
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	603	738
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	74	153
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	529	585
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	191	185
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	3	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	190	149
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	113	198
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	32	51
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	1,017	876
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	50	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	411	560
Financial assets designated at fair value through profit or loss, category | Debt instruments asset | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	556	115
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	3,754	1,435
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	74,187	70,343
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	57,069	53,950
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	257	289
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	57,024	53,950
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	257	289
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	47,255	43,489
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	110	111
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	464	610
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
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	4,709	4,411
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	32	26
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	1,365	1,233
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	105	143
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	25	7
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	45
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	3,206	4,200
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	10	2
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	7,267	6,363
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	7,260	6,352
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	2	6
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	6,513	5,868
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
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	8	158
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	2
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	739	326
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	60,237	68,058
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	58,540	66,924
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	347	147
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	8,451	8,607
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	8,443	8,586
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	8	21
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	7,906	7,704
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
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	17	20
Financial Assets And Liabilities Category [Member] | Hedging derivatives, category | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8
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	520	862
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	5,393	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	1,747	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	1,951	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	11	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	386	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 asset | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	653	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 asset | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	953	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	1,083	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	612	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	102,574	92,879
Financial assets with negative net fair value	2
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	57,567	55,033
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	603	738
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	300	205
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	990	314
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	74	153
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	56,277	54,514
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	529	585
Financial Assets And Liabilities Category [Member] | Financial assets held for trading, category | Swaps
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets with negative net fair value		0
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	47,337	44,423
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	191	185
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	388	617
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	3	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	3,679	3,778
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	190	149
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	11
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	1,376	1,118
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	113	198
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	3,486	4,578
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	32	51
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	73,420	57,460
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	69,664	53,482
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	1,017	876
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	39,760	22,897
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	50	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	22,599	21,355
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	411	560
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	7,105	9,226
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Debt instruments asset | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	200	4
Financial Assets And Liabilities Category [Member] | Financial assets designated at fair value through profit or loss, category | Debt instruments asset | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	556	115
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	118,062	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	15,679	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	3,754	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	166	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	3,216	689
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Debt instruments asset | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	15,391	14,699
Financial Assets And Liabilities Category [Member] | Financial assets at fair value through other comprehensive income, category | Debt instruments asset | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	192	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	122	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	346	581
Liabilities Under Insurance Contracts [Member]
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	731	765
Liabilities Under Insurance Contracts [Member] | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	€ 731	€ 765

Accounting policies - Effect of

Accounting policies - Effect of change in assumptions (Details) € in Thousands, R$ in Millions	6 Months Ended
	Jun. 30, 2019BRL (R$)	Jun. 30, 2019EUR (€)	Jun. 30, 2018EUR (€)
Disclosure of detailed information about financial instruments [line items]
Projected shift in HPI spot rate, Assets (as a percent)	10.00%	10.00%
Projected shift in HPI spot rate, Liabilities (as a percent)	10.00%	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		€ 68,000	€ 13,000
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%	0.01%
Quanto Options [Member] | Minimum
Disclosure of detailed information about financial instruments [line items]
Long-term volatility, Assets (as a percent)	62.00%	62.00%
Quanto Options [Member] | Maximum
Disclosure of detailed information about financial instruments [line items]
Long-term volatility, Assets (as a percent)	69.00%	69.00%
Quanto Options [Member] | Weighted average
Disclosure of detailed information about financial instruments [line items]
Long-term volatility, Assets (as a percent)	65.00%	65.00%
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%	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%)	(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)	2.41%	2.41%
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		€ (7,800)
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		€ 7,300
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	776.48	776.48
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		€ (4,300)
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		5,000
Financial liabilities held for trading | Derivatives | 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 liabilities due to change in inputs		(481)
Financial liabilities held for trading | Derivatives | 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 liabilities due to change in inputs		€ 480
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%	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%	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%	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%	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%	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%)	(0.03%)
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | Interest Rate Curve Foreign Exchange Market Prices [Member] | Unfavourable Scenario [Member]
Disclosure of detailed information about financial instruments [line items]
Increase in fair value of assets due to change in inputs		€ 1,800
Financial assets at fair value through other comprehensive income, category | Debt and equity instruments | 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		€ (1,800)
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%	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%)	(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)	22.00%	22.00%
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		€ (27,200)
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		7,700
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		(6,600)
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		€ 6,600
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%	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		€ 244,900
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		€ (313,800)
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%	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		€ (300)
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		€ 300
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%	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%	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)	2.53%	2.53%
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		€ (4,400)
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		€ 4,300
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	795.75	795.75
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		€ (9,800)
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 | R$	R$ 9.8
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		€ (163,200)
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]
Increase in fair value of assets due to change in inputs | R$	R$ 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%	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%)	(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 HPI forwards, using the present value model, HIP forward growth rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	2.66%	2.66%
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 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		€ (5,900)
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 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		€ 5,200
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, HPI spot rate | Weighted average
Disclosure of detailed information about financial instruments [line items]
HPI forward growth rate, Assets (as a percent)	788.41%	788.41%
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, 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		€ (10,700)
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, 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		€ 10,700
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]
Long-term volatility, Assets (as a percent)	4.70%	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		€ 2,200
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		€ (11,500)
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%	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		€ (19,800)
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		€ 4,400
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%	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		€ (121,200)
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		€ 105,100

Accounting policies - Changes i

Accounting policies - Changes in the financial instruments classified as Level 3 (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Level 2
Changes in financial instruments, Assets
Assets at beginning/end of period	€ 153,100	€ 140,659
Changes in financial instruments, Liabilities
Liabilities at beginning of period	127,991
Liabilities at end of period	123,600
Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	7,333	4,473
Purchases/Issuances	4,008
Sales/Settlements	(736)
Changes in fair value recognized in profit or loss	116
Changes in fair value recognized in equity	(209)
Level reclassifications (out of) Level 3	(368)
Other	49
Changes in financial instruments, Liabilities
Liabilities at beginning of period	442
Purchases/Issuances	335
Sales/Settlements	(4)
Changes in fair value recognized in profit or loss	48
Level reclassifications (out of) Level 3	(219)
Other	4
Liabilities at end of period	606
Financial liabilities held for trading | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	289
Purchases/Issuances	42
Sales/Settlements	(2)
Changes in fair value recognized in profit or loss	42
Level reclassifications (out of) Level 3	(120)
Other	6
Liabilities at end of period	257
Financial liabilities held for trading | Derivatives | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	289
Purchases/Issuances	42
Sales/Settlements	(2)
Changes in fair value recognized in profit or loss	42
Level reclassifications (out of) Level 3	(120)
Other	6
Liabilities at end of period	257
Financial liabilities held for trading | Swaps | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	111
Purchases/Issuances	2
Changes in fair value recognized in profit or loss	4
Level reclassifications (out of) Level 3	(6)
Other	(1)
Liabilities at end of period	110
Financial liabilities held for trading | Exchange rate options | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	7
Level reclassifications (out of) Level 3	(7)
Financial liabilities held for trading | Interest rate options | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	26
Changes in fair value recognized in profit or loss	3
Other	3
Liabilities at end of period	32
Financial liabilities held for trading | Index and securities options | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	143
Purchases/Issuances	40
Sales/Settlements	(2)
Changes in fair value recognized in profit or loss	34
Level reclassifications (out of) Level 3	(113)
Other	3
Liabilities at end of period	105
Financial liabilities held for trading | Other | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	2
Changes in fair value recognized in profit or loss	1
Level reclassifications into Level 3	6
Other	1
Liabilities at end of period	10
Hedging derivatives, category | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	6
Purchases/Issuances	2
Level reclassifications (out of) Level 3	(6)
Liabilities at end of period	2
Hedging derivatives, category | Swaps | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	6
Level reclassifications (out of) Level 3	(6)
Hedging derivatives, category | Interest rate options | Level 3
Changes in financial instruments, Liabilities
Purchases/Issuances	2
Liabilities at end of period	2
Financial liabilities designated at fair value through profit or loss | Level 3
Changes in financial instruments, Liabilities
Liabilities at beginning of period	147
Purchases/Issuances	291
Sales/Settlements	(2)
Changes in fair value recognized in profit or loss	6
Level reclassifications (out of) Level 3	(93)
Other	(2)
Liabilities at end of period	347
Hedging derivatives, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	8	21
Purchases/Issuances	8
Level reclassifications (out of) Level 3	(21)
Hedging derivatives, category | Swaps | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period		21
Level reclassifications (out of) Level 3	(21)
Hedging derivatives, category | Interest rate options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	8
Purchases/Issuances	8
Financial assets held for trading, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	603	738
Purchases/Issuances	58
Sales/Settlements	(46)
Changes in fair value recognized in profit or loss	45
Level reclassifications (out of) Level 3	(200)
Other	8
Financial assets held for trading, category | Debt and equity instruments | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	74	153
Purchases/Issuances	13
Sales/Settlements	(24)
Changes in fair value recognized in profit or loss	(2)
Level reclassifications (out of) Level 3	(69)
Other	3
Financial assets held for trading, category | Derivatives | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	529	585
Purchases/Issuances	45
Sales/Settlements	(22)
Changes in fair value recognized in profit or loss	47
Level reclassifications (out of) Level 3	(131)
Other	5
Financial assets held for trading, category | Swaps | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	191	185
Purchases/Issuances	1
Sales/Settlements	(8)
Changes in fair value recognized in profit or loss	15
Level reclassifications (out of) Level 3	(3)
Other	1
Financial assets held for trading, category | Exchange rate options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	3	2
Changes in fair value recognized in profit or loss	1
Financial assets held for trading, category | Interest rate options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	190	149
Changes in fair value recognized in profit or loss	10
Level reclassifications into Level 3	31
Financial assets held for trading, category | Index and securities options | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	113	198
Purchases/Issuances	33
Sales/Settlements	(11)
Changes in fair value recognized in profit or loss	21
Level reclassifications (out of) Level 3	(132)
Other	4
Financial assets held for trading, category | Other | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	32	51
Purchases/Issuances	11
Sales/Settlements	(3)
Level reclassifications (out of) Level 3	(27)
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	1,951	1,403
Purchases/Issuances	674
Sales/Settlements	(187)
Changes in fair value recognized in profit or loss	70
Level reclassifications (out of) Level 3	(7)
Other	(2)
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	386	460
Purchases/Issuances	67
Sales/Settlements	(176)
Changes in fair value recognized in profit or loss	19
Other	16
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments asset | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	953	481
Purchases/Issuances	493
Sales/Settlements	(2)
Changes in fair value recognized in profit or loss	3
Level reclassifications (out of) Level 3	(8)
Other	(14)
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	612	462
Purchases/Issuances	114
Sales/Settlements	(9)
Changes in fair value recognized in profit or loss	48
Level reclassifications into Level 3	1
Other	(4)
Financial assets at fair value through other comprehensive income, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	3,754	1,435
Purchases/Issuances	3,268
Sales/Settlements	(502)
Changes in fair value recognized in equity	(209)
Level reclassifications (out of) Level 3	(316)
Other	78
Financial assets designated at fair value through profit or loss, category | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	1,017	876
Sales/Settlements	(1)
Changes in fair value recognized in profit or loss	1
Level reclassifications into Level 3	176
Other	(35)
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	50	201
Level reclassifications (out of) Level 3	(151)
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	411	560
Sales/Settlements	(1)
Level reclassifications (out of) Level 3	(112)
Other	(36)
Financial assets designated at fair value through profit or loss, category | Debt instruments asset | Level 3
Changes in financial instruments, Assets
Assets at beginning/end of period	556	€ 115
Changes in fair value recognized in profit or loss	1
Level reclassifications into Level 3	439
Other	€ 1

Other disclosures - Exposure to

Other disclosures - Exposure to Europe's peripheral countries (Details) - Sovereign Risk - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Disclosure of financial assets [line items]
Off-balance-sheet government debt securities	€ 15,005	€ 13,364
Off-balance-sheet other than derivatives contingent liabilities and commitments	5,012	5,622
SPAIN
Disclosure of financial assets [line items]
Risk exposure	41,934	49,640
Off-balance-sheet government debt securities	13,131	11,529
Off-balance-sheet other than derivatives contingent liabilities and commitments	4,423	4,870
PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	9,489	8,753
Off-balance-sheet government debt securities	1,406	1,415
Off-balance-sheet other than derivatives contingent liabilities and commitments	297	366
ITALY
Disclosure of financial assets [line items]
Risk exposure	4,629	261
Off-balance-sheet government debt securities	466	418
Off-balance-sheet other than derivatives contingent liabilities and commitments	292	386
IRELAND
Disclosure of financial assets [line items]
Off-balance-sheet government debt securities	2	2
Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure effect of short positions	(1,710)	(2,458)
Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure effect of short positions	(759)	(115)
Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure effect of short positions	(159)	(681)
Loans and advances - Customers
Disclosure of financial assets [line items]
Valuation adjustment	22	34
Loans and advances - Customers | SPAIN
Disclosure of financial assets [line items]
Risk exposure	13,932	13,615
Loans and advances - Customers | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	3,686	3,725
Loans and advances - Customers | ITALY
Disclosure of financial assets [line items]
Risk exposure	62	80
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure - long positions	6,084	3,601
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure - long positions	365	72
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure - long positions	1,151	477
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	16,379	27,078
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	5,633	4,794
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure	3,188
Financial assets at amortised cost, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	7,249	7,804
Financial assets at amortised cost, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	564	277
Financial assets at amortised cost, category | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure	387	385
Hedging derivatives, category | Other Than Credit Default Swaps | SPAIN
Disclosure of financial assets [line items]
Risk exposure	522	407
Hedging derivatives, category | Other Than Credit Default Swaps | ITALY
Disclosure of financial assets [line items]
Risk exposure	3	87
Hedging derivatives, category | Other Than Credit Default Swaps | IRELAND
Disclosure of financial assets [line items]
Risk exposure effect of short positions	(1)
Risk exposure		€ 2
Hedging derivatives, category | Credit default swap | ITALY
Disclosure of financial assets [line items]
Risk exposure effect of short positions	€ (3)

Other disclosures - Other expos

Other disclosures - Other exposure to other counterparties (Details) - Other Counterparties Risk - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
SPAIN
Disclosure of financial assets [line items]
Risk exposure	€ 238,747	€ 258,075
Off-balance-sheet other than derivatives contingent liabilities and commitments	85,514	76,691
PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	39,960	38,887
Off-balance-sheet other than derivatives contingent liabilities and commitments	7,951	8,158
ITALY
Disclosure of financial assets [line items]
Risk exposure	16,049	17,896
Off-balance-sheet other than derivatives contingent liabilities and commitments	3,842	5,193
Greece
Disclosure of financial assets [line items]
Risk exposure	71	80
Off-balance-sheet other than derivatives contingent liabilities and commitments	200	200
IRELAND
Disclosure of financial assets [line items]
Risk exposure	10,013	11,788
Off-balance-sheet other than derivatives contingent liabilities and commitments	801	850
Loans and advances - Customers
Disclosure of financial assets [line items]
Valuation adjustment	8,304	9,385
Loans and advances - Customers | SPAIN
Disclosure of financial assets [line items]
Risk exposure		202,149
Loans and advances - Customers | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		33,596
Loans and advances - Customers | ITALY
Disclosure of financial assets [line items]
Risk exposure		10,830
Loans and advances - Customers | Greece
Disclosure of financial assets [line items]
Risk exposure		80
Loans and advances - Customers | IRELAND
Disclosure of financial assets [line items]
Risk exposure		10,633
Cash, Cash Balance At Central Banks And Other Deposits On Demand | SPAIN
Disclosure of financial assets [line items]
Risk exposure	28,154	42,655
Cash, Cash Balance At Central Banks And Other Deposits On Demand | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	2,179	1,369
Cash, Cash Balance At Central Banks And Other Deposits On Demand | ITALY
Disclosure of financial assets [line items]
Risk exposure	361	51
Reverse repurchase agreements | SPAIN
Disclosure of financial assets [line items]
Risk exposure	7,433	8,117
Reverse repurchase agreements | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	205
Reverse repurchase agreements | ITALY
Disclosure of financial assets [line items]
Risk exposure	3,618	6,296
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	614	412
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	31	11
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure	328	84
Financial Assets Held For Trading And Financial Assets Designated At Fair Value Through Profit Or Loss [Member] | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure	30	21
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	1,236
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	38
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure	578
Financial assets at fair value through other comprehensive income, category | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure	1,398
Non-Trading Financial Assets At Fair Value Through Profit Or Loss Mandatorily Measured At Fair Value Category [Member] | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	322
Financial assets at amortised cost, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure	4,355
Financial assets at amortised cost, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	3,561
Financial assets at amortised cost, category | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure	148
Financial assets at amortised cost, category | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure	21
Financial assets available for sale, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure		1,760
Financial assets available for sale, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		90
Financial assets available for sale, category | Debt instruments asset | ITALY
Disclosure of financial assets [line items]
Risk exposure		635
Financial assets available for sale, category | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure		1,093
Loans and receivables, category | SPAIN
Disclosure of financial assets [line items]
Risk exposure	196,633
Loans and receivables, category | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	33,946
Loans and receivables, category | ITALY
Disclosure of financial assets [line items]
Risk exposure	11,016
Loans and receivables, category | Greece
Disclosure of financial assets [line items]
Risk exposure	71
Loans and receivables, category | IRELAND
Disclosure of financial assets [line items]
Risk exposure	8,564
Loans and receivables, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure		320
Loans and receivables, category | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure		16
Held-to-maturity investments, category | Debt instruments asset | SPAIN
Disclosure of financial assets [line items]
Risk exposure		2,662
Held-to-maturity investments, category | Debt instruments asset | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure		3,821
Held-to-maturity investments, category | Debt instruments asset | IRELAND
Disclosure of financial assets [line items]
Risk exposure		25
Hedging derivatives, category | Other Than Credit Default Swaps | SPAIN
Disclosure of financial assets [line items]
Risk exposure	3,674	3,880
Hedging derivatives, category | Other Than Credit Default Swaps | PORTUGAL
Disclosure of financial assets [line items]
Risk exposure	1,084	1,132
Hedging derivatives, category | Other Than Credit Default Swaps | ITALY
Disclosure of financial assets [line items]
Risk exposure	740	253
Hedging derivatives, category | Other Than Credit Default Swaps | Greece
Disclosure of financial assets [line items]
Risk exposure	33	28
Hedging derivatives, category | Other Than Credit Default Swaps | IRELAND
Disclosure of financial assets [line items]
Risk exposure	245	127
Hedging derivatives, category | Credit default swap | SPAIN
Disclosure of financial assets [line items]
Risk exposure	€ 2
Risk exposure effect of short positions		€ (6)

Other disclosures - Credit defa

Other disclosures - Credit default swaps (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Debt Instruments
Notional amount	€ 8,118	€ 8,118
Hedging derivatives, category | SPAIN | Bought | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	216	151
Financial assets, at fair value	2
Financial liabilities at fair value		(2)
Hedging derivatives, category | SPAIN | Sold | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	380	382
Financial assets, at fair value	4
Financial liabilities at fair value		(4)
Hedging derivatives, category | SPAIN | Net Bought Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Financial liabilities at fair value		(6)
Hedging derivatives, category | SPAIN | Net Sold Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	164	231
Financial assets, at fair value	2
Hedging derivatives, category | PORTUGAL | Bought | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	26	26
Hedging derivatives, category | PORTUGAL | Sold | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	26	26
Hedging derivatives, category | ITALY | Bought | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	312
Financial assets, at fair value	3
Hedging derivatives, category | ITALY | Bought | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	60	205
Financial assets, at fair value	4
Financial liabilities at fair value		(5)
Hedging derivatives, category | ITALY | Sold | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	9	265
Hedging derivatives, category | ITALY | Sold | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	153	75
Financial assets, at fair value	4	5
Hedging derivatives, category | ITALY | Net Bought Position [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount	303
Hedging derivatives, category | ITALY | Net Bought Position [Member] | Other Counterparties Risk | Credit default swap
Debt Instruments
Notional amount	93	130
Hedging derivatives, category | ITALY | Net Sold Position [Member] | Sovereign Risk | Credit default swap
Debt Instruments
Notional amount		€ 265
Financial assets, at fair value	€ (3)

Risk management - Forborne Loan

Risk management - Forborne Loans (Details) - Credit risk - Forborne loan portfolio € in Millions	6 Months Ended
	Jun. 30, 2019EUR (€)contract	Dec. 31, 2018EUR (€)
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 25,287	€ 30,527
Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (10,122)
Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	1,786,679
Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 9,635
With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	770,394
With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 25,774
Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	15,949
Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	3,682
Public sector | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (2)
Public sector | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	36
Public sector | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 34
Public sector | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	16
Public sector | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 10
Public sector | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	8
Other financial institutions (Financial business activity) | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (28)
Other financial institutions (Financial business activity) | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	585
Other financial institutions (Financial business activity) | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 58
Other financial institutions (Financial business activity) | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	268
Other financial institutions (Financial business activity) | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 102
Other financial institutions (Financial business activity) | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	15
Other financial institutions (Financial business activity) | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	28
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (5,825)
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	145,564
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 5,916
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	45,194
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 12,919
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	8,398
Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,272
Construction and property development | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (594)
Construction and property development | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	5,963
Construction and property development | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 252
Construction and property development | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	1,909
Construction and property development | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,653
Construction and property development | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1,363
Construction and property development | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	46
Other warehouses | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (4,267)
Other warehouses | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	1,640,494
Other warehouses | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 3,627
Other warehouses | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	724,916
Other warehouses | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 12,743
Other warehouses | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	7,528
Other warehouses | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	2,382
Nonperforming | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (8,264)
Nonperforming | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	1,012,014
Nonperforming | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 5,748
Nonperforming | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	175,467
Nonperforming | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 12,361
Nonperforming | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	8,466
Nonperforming | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	990
Nonperforming | Public sector | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (1)
Nonperforming | Public sector | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	11
Nonperforming | Public sector | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 3
Nonperforming | Public sector | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	10
Nonperforming | Public sector | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 4
Nonperforming | Public sector | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	3
Nonperforming | Other financial institutions (Financial business activity) | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (20)
Nonperforming | Other financial institutions (Financial business activity) | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	290
Nonperforming | Other financial institutions (Financial business activity) | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 26
Nonperforming | Other financial institutions (Financial business activity) | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	126
Nonperforming | Other financial institutions (Financial business activity) | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 18
Nonperforming | Other financial institutions (Financial business activity) | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	10
Nonperforming | Other financial institutions (Financial business activity) | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	1
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (5,408)
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	89,277
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 3,927
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	30,229
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 7,793
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	5,143
Nonperforming | Non-financial corporations and individual entrepreneurs (Non-financial business activity) | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	622
Nonperforming | Construction and property development | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (576)
Nonperforming | Construction and property development | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	4,246
Nonperforming | Construction and property development | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 200
Nonperforming | Construction and property development | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	1,400
Nonperforming | Construction and property development | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,146
Nonperforming | Construction and property development | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	877
Nonperforming | Construction and property development | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	44
Nonperforming | Other warehouses | Accumulated impairment
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ (2,835)
Nonperforming | Other warehouses | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	922,436
Nonperforming | Other warehouses | Without collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 1,792
Nonperforming | Other warehouses | With property collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions | contract	145,102
Nonperforming | Other warehouses | With property collateral | Gross carrying amount
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Loans and receivables	€ 4,546
Nonperforming | Other warehouses | Real estate guarantee
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	3,310
Nonperforming | Other warehouses | Rest of real guarantees
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 367

Risk management - Forborne Lo_2

Risk management - Forborne Loans Roll Forward (Details) - Credit risk - Forborne loan portfolio € in Millions	6 Months Ended
	Jun. 30, 2019EUR (€)
Changes in the portfolio
Beginning balance	€ 30,527
Refinancing and restructuring of the period	2,828
Memorandum item: Impact recorded in the income statement for the period	1,177
Debt repayment	(3,880)
Foreclosure	(249)
Derecognized from the consolidated balance sheet	(892)
Other changes	(3,047)
Balance at end of year	€ 25,287

Risk management - Spain Home Pu

Risk management - Spain Home Purchase Loans (Details) - Home purchase loans - SPAIN € in Millions	6 Months Ended
	Jun. 30, 2019EUR (€)
Credit risk
Percentage secured by mortgage	99.41%
Gross carrying amount
Credit risk
Financial assets	€ 63,102
Maximum
Credit risk
Loan-to-value (LTV) ratio	80.00%
Weighted average
Credit risk
Affordability Rate	28.35%
Less Than 80 %
Credit risk
Percentage of portfolio with LTV less than 80%	84.96%
Nonperforming
Credit risk
Financial assets	€ 2,503
Without collateral | Gross carrying amount
Credit risk
Financial assets	374
Without collateral | Nonperforming
Credit risk
Financial assets	26
With property collateral
Credit risk
Financial assets	62,728
With property collateral | Gross carrying amount
Credit risk
Financial assets	62,728
With property collateral | Less than or equal to 40%
Credit risk
Financial assets	16,299
With property collateral | More than 40% and less than or equal to 60%
Credit risk
Financial assets	18,919
With property collateral | More than 60% and less than or equal to 80%
Credit risk
Financial assets	18,078
With property collateral | More than 80% and less than or equal to 100%
Credit risk
Financial assets	5,558
With property collateral | More than 100%
Credit risk
Financial assets	3,874
With property collateral | Nonperforming
Credit risk
Financial assets	2,477
With property collateral | Nonperforming | Less than or equal to 40%
Credit risk
Financial assets	220
With property collateral | Nonperforming | More than 40% and less than or equal to 60%
Credit risk
Financial assets	306
With property collateral | Nonperforming | More than 60% and less than or equal to 80%
Credit risk
Financial assets	454
With property collateral | Nonperforming | More than 80% and less than or equal to 100%
Credit risk
Financial assets	433
With property collateral | Nonperforming | More than 100%
Credit risk
Financial assets	€ 1,064

Risk management - Spain Real Es

Risk management - Spain Real Estate Business: gross, collateral, allowance (Details) - SPAIN € in Millions	Jun. 30, 2019EUR (€)
Accumulated impairment
Distribution of portfolio
Financial assets	€ (1,221)
Construction and property development
Distribution of portfolio
Financial assets	3,752
Excess over collateral value	656
Construction and property development | Nonperforming
Distribution of portfolio
Excess over collateral value	288
Construction and property development | Gross carrying amount
Distribution of portfolio
Financial assets	4,131
Written-off assets	2,804
Construction and property development | Gross carrying amount | Nonperforming
Distribution of portfolio
Financial assets	955
Construction and property development | Accumulated impairment
Distribution of portfolio
Financial assets	(379)
Construction and property development | Accumulated impairment | Nonperforming
Distribution of portfolio
Financial assets	€ (354)

Risk management - Spain Real _2

Risk management - Spain Real Estate Business Segment Information (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Memorandum items: Data from the public consolidated balance sheet
Total assets	€ 1,512,096	€ 1,459,271
SPAIN
Memorandum items: Data from the public consolidated balance sheet
Total assets	1,512,096
SPAIN | Accumulated impairment
Memorandum items: Data from the public consolidated balance sheet
Financial assets	(1,221)
SPAIN | Customers excluding the public sector
Memorandum items: Data from the public consolidated balance sheet
Total loans and advances to customers excluding the public sector (business in Spain)	€ 224,086

Risk management - Spain Real _3

Risk management - Spain Real Estate Business Concentration Information (Details) - Construction and property development - SPAIN € in Millions	Jun. 30, 2019EUR (€)
Distribution of portfolio
Financial assets	€ 3,752
Gross carrying amount
Distribution of portfolio
Financial assets	4,131
Gross carrying amount | Without collateral
Distribution of portfolio
Financial assets	288
Gross carrying amount | With property collateral
Distribution of portfolio
Financial assets	3,843
Gross carrying amount | Buildings | With property collateral
Distribution of portfolio
Financial assets	2,175
Gross carrying amount | Buildings | Residential Property Collateral [Member]
Distribution of portfolio
Financial assets	1,073
Gross carrying amount | Buildings | Non-residential Property Collateral [Member]
Distribution of portfolio
Financial assets	1,102
Gross carrying amount | Construction in progress | With property collateral
Distribution of portfolio
Financial assets	1,133
Gross carrying amount | Construction in progress | Residential Property Collateral [Member]
Distribution of portfolio
Financial assets	804
Gross carrying amount | Construction in progress | Non-residential Property Collateral [Member]
Distribution of portfolio
Financial assets	329
Gross carrying amount | Land [member] | With property collateral
Distribution of portfolio
Financial assets	535
Gross carrying amount | Land [member] | Developed Land Collateral [Member]
Distribution of portfolio
Financial assets	363
Gross carrying amount | Land [member] | Undeveloped Land Collateral [Member]
Distribution of portfolio
Financial assets	€ 172

Risk Management - Foreclosed re

Risk Management - Foreclosed real estate assets (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Distribution of portfolio
Investments	€ 7,788	€ 7,588
Project Quasar Investments 2017, S.L. [Member]
Distribution of portfolio
Investments	1,701
Foreclosed assets
Distribution of portfolio
Equity instruments	69
SPAIN
Distribution of portfolio
Foreclosed assets	4,184
Impairment losses since time of foreclosure	2,737
SPAIN | Construction and property development
Distribution of portfolio
Foreclosed assets	3,282
Impairment losses since time of foreclosure	2,519
SPAIN | Construction and property development | Real Estate Assets, Completed Buildings [Member]
Distribution of portfolio
Foreclosed assets	1,447
Impairment losses since time of foreclosure	523
SPAIN | Construction and property development | Real Estate Assets, Completed Buildings, Residential [Member]
Distribution of portfolio
Foreclosed assets	392
Impairment losses since time of foreclosure	90
SPAIN | Construction and property development | Real Estate Assets, Completed Buildings, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	1,055
Impairment losses since time of foreclosure	433
SPAIN | Construction and property development | Real Estate Assets, Buildings Under Construction [Member]
Distribution of portfolio
Foreclosed assets	226
Impairment losses since time of foreclosure	74
SPAIN | Construction and property development | Real Estate Assets, Buildings Under Construction, Residential [Member]
Distribution of portfolio
Foreclosed assets	218
Impairment losses since time of foreclosure	74
SPAIN | Construction and property development | Real Estate Assets, Buildings Under Construction, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	8
SPAIN | Construction and property development | Real Estate Assets, Land [Member]
Distribution of portfolio
Foreclosed assets	1,609
Impairment losses since time of foreclosure	1,922
SPAIN | Construction and property development | Real Estate Assets, Developed Land [Member]
Distribution of portfolio
Foreclosed assets	630
Impairment losses since time of foreclosure	586
SPAIN | Construction and property development | Real Estate Assets, Undeveloped Land [Member]
Distribution of portfolio
Foreclosed assets	979
Impairment losses since time of foreclosure	1,336
SPAIN | Home purchase loans
Distribution of portfolio
Foreclosed assets	644
Impairment losses since time of foreclosure	135
SPAIN | Other loans
Distribution of portfolio
Foreclosed assets	258
Impairment losses since time of foreclosure	83
SPAIN | Gross carrying amount
Distribution of portfolio
Foreclosed assets	8,362
SPAIN | Gross carrying amount | Construction and property development
Distribution of portfolio
Foreclosed assets	7,008
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Completed Buildings [Member]
Distribution of portfolio
Foreclosed assets	2,286
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Completed Buildings, Residential [Member]
Distribution of portfolio
Foreclosed assets	587
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Completed Buildings, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	1,699
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Buildings Under Construction [Member]
Distribution of portfolio
Foreclosed assets	353
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Buildings Under Construction, Residential [Member]
Distribution of portfolio
Foreclosed assets	341
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Buildings Under Construction, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	12
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Land [Member]
Distribution of portfolio
Foreclosed assets	4,369
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Developed Land [Member]
Distribution of portfolio
Foreclosed assets	1,610
SPAIN | Gross carrying amount | Construction and property development | Real Estate Assets, Undeveloped Land [Member]
Distribution of portfolio
Foreclosed assets	2,759
SPAIN | Gross carrying amount | Home purchase loans
Distribution of portfolio
Foreclosed assets	935
SPAIN | Gross carrying amount | Other loans
Distribution of portfolio
Foreclosed assets	419
SPAIN | Accumulated impairment
Distribution of portfolio
Foreclosed assets	4,178
SPAIN | Accumulated impairment | Construction and property development
Distribution of portfolio
Foreclosed assets	(3,726)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Completed Buildings [Member]
Distribution of portfolio
Foreclosed assets	(839)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Completed Buildings, Residential [Member]
Distribution of portfolio
Foreclosed assets	(195)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Completed Buildings, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	(644)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Buildings Under Construction [Member]
Distribution of portfolio
Foreclosed assets	(127)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Buildings Under Construction, Residential [Member]
Distribution of portfolio
Foreclosed assets	(123)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Buildings Under Construction, Non-residential [Member]
Distribution of portfolio
Foreclosed assets	(4)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Land [Member]
Distribution of portfolio
Foreclosed assets	(2,760)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Developed Land [Member]
Distribution of portfolio
Foreclosed assets	(980)
SPAIN | Accumulated impairment | Construction and property development | Real Estate Assets, Undeveloped Land [Member]
Distribution of portfolio
Foreclosed assets	(1,780)
SPAIN | Accumulated impairment | Home purchase loans
Distribution of portfolio
Foreclosed assets	(291)
SPAIN | Accumulated impairment | Other loans
Distribution of portfolio
Foreclosed assets	€ (161)

Risk management - Capital Risk

Risk management - Capital Risk (Details)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	11.30%	11.47%
Tier 1 phase in capital ratio	12.87%	13.12%
Total phase-in capital	14.83%	14.98%
Minimum
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	9.70%
Pillar 1 percentage	4.50%
IFRS Scenario Plan [Member] | Minimum
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
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 Phase-in Coefficients (Details) - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Risk management
Level 1 ordinary eligible capital (millions of euros)	€ 68,406	€ 67,962
Level 1 additional eligible capital (millions of euros)	9,509	9,754
Level 2 eligible capital (millions of euros)	11,867	11,009
Risks (millions of euros)	€ 605,470	€ 592,319
Level 1 ordinary capital coefficient (CET 1) (as a percent)	11.30%	11.47%
Level 1 additional capital coefficient (AT1) (as a percent)	1.57%	1.65%
Level 1 phase in capital ratio (as a percent)	12.87%	13.12%
Level 2 capital coefficient (TIER 2) (as a percent)	1.96%	1.86%
Total capital coefficient (as a percent)	14.83%	14.98%

Risk management - Regulatory _2

Risk management - Regulatory Capital Other Information (Details) - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
IFRS Leverage Ratios [Abstract]
Level 1 Capital (millions of euros)	€ 77,915	€ 77,716
Exposure (millions of euros)	€ 1,552,573	€ 1,489,094
Leverage Ratio (as a percent)	5.02%	5.22%

Additional disclosures - Parent

Additional disclosures - Parent-Only Balance Sheets (Details) - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Assets [abstract]
Cash and bank balances at central banks	€ 80,471		€ 84,721
Financial assets held for trading	102,574	€ 92,879
Investments	7,788	7,588
Premises and equipment, net	32,651	24,594
Other assets	12,140	9,348
TOTAL ASSETS	1,512,096	1,459,271
Liabilities [abstract]
Other liabilities	10,790	13,088
TOTAL LIABILITIES	1,402,111	1,351,910
Shareholders' equity
Share capital	8,118	8,118
TOTAL EQUITY	109,985	107,361	€ 104,445	€ 106,833
TOTAL LIABILITIES AND EQUITY	1,512,096	1,459,271
Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Cash and bank balances at central banks	107,566	105,660
Financial assets held for trading	81,249	70,825
Held-to-maturity investments	47,575	61,064
Loans and receivables	276,396	263,142
Investments	82,596	81,734
Premises and equipment, net	6,389	2,410
Other assets	24,211	23,541
TOTAL ASSETS	625,982	608,376
Liabilities [abstract]
Deposits	364,457	350,786
Short-term debt	36,163	30,883
Long-term debt	68,083	75,600
Total borrowings	104,246	106,483
Other liabilities	89,705	82,340
TOTAL LIABILITIES	558,408	539,609
Shareholders' equity
Share capital	8,118	8,118
Retained earnings and other reserves	59,456	60,649
TOTAL EQUITY	67,574	68,767
TOTAL LIABILITIES AND EQUITY	625,982	608,376
Bank Subsidiaries [Member] | Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Cash and bank balances at central banks	15,732	16,339
Held-to-maturity investments	8,744	11,084
Investments	63,480	69,118
Liabilities [abstract]
Deposits	18,668	18,526
Total borrowings	501	2,874
Non-Bank Subsidiaries [Member] | Banco Santander S.A. | Reportable Legal Entities [Member]
Assets [abstract]
Held-to-maturity investments	4,306	4,581
Loans and receivables	29,637	26,505
Investments	19,116	12,616
Liabilities [abstract]
Deposits	16,790	13,655
Total borrowings	€ 2,740	€ 998

Additional disclosures - Pare_2

Additional disclosures - Parent-Only Income Statements (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Income Statements, Captions [Line Items]
Dividend income	€ 361	€ 264
Interest expense	(11,033)	(9,973)
Non-interest income	855	813
Non-interest expense	(1,136)	(979)
Operating profit / (loss) before tax	6,531	6,899
Tax expense or income from continuing operations	(2,449)	(2,378)
Net income	4,082	4,521
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Interest income	4,148	2,836
Dividend income	1,735	1,447
Interest and dividends from affiliates	5,883	4,283
Interest expense	(2,113)	(1,586)
Interest income/(Charges)	3,770	2,697
Provision for credit losses	(544)	(209)
Interest income/ (Charges) after provision for credit losses	3,226	2,488
Non-interest income	1,805	1,708
Non-interest expense	(4,633)	(2,937)
Operating profit / (loss) before tax	398	1,259
Tax expense or income from continuing operations	145	36
Net income	543	1,295
Banco Santander S.A. | Reportable Legal Entities [Member] | Bank Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Dividend income	1,355	957
Banco Santander S.A. | Reportable Legal Entities [Member] | Non-Bank Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Dividend income	€ 381	€ 490

Additional disclosures - Pare_3

Additional disclosures - Parent-Only Comprehensive Income Statements (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Statement of Income Captions [Line Items]
Profit (loss)	€ 4,082	€ 4,521
OTHER RECOGNIZED INCOME AND EXPENSE	859	(2,000)
Other comprehensive income that will be reclassified to profit or loss, net of tax	1,567	(2,538)
Cash flow hedges (Effective portion)	127	(138)
Revaluation gains (losses)	260	(644)
Amounts transferred to income statement	(133)	506
Hedges of net investments in foreign operations (Effective portion)	(762)	293
Revaluation gain (losses)	(762)	293
Income tax relating to components of other comprehensive income that may be reclassified to profit or loss	(636)	378
Other comprehensive income that will not be reclassified to profit or loss, net of tax	(708)	538
Actuarial gains and losses on defined benefit pension plans	(833)	981
Income tax relating to items that will not be reclassified to profit or loss	266	(274)
Total recognized income and expenses	4,941	2,521
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Statement of Income Captions [Line Items]
Profit (loss)	543	1,295
OTHER RECOGNIZED INCOME AND EXPENSE	15	17
Other comprehensive income that will be reclassified to profit or loss, net of tax	179	60
Financial assets available-for-sale	464	59
Revaluation gains (losses)	622	188
Amounts transferred to income statement	(158)	(129)
Cash flow hedges (Effective portion)	(207)	27
Revaluation gains (losses)	(204)	34
Amounts transferred to income statement	(3)	(7)
Income tax relating to components of other comprehensive income that may be reclassified to profit or loss	(78)	(26)
Other comprehensive income that will not be reclassified to profit or loss, net of tax	(164)	(43)
Actuarial gains and losses on defined benefit pension plans	(98)	81
Other valuation adjustments	(53)	(98)
Income tax relating to items that will not be reclassified to profit or loss	(13)	(27)
Total recognized income and expenses	€ 558	€ 1,312

Additional disclosures - Pare_4

Additional disclosures - Parent-Only Cash Flow Statements (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Profit (loss)	€ 4,082	€ 4,521
Adjustments to profit	12,166	11,360
Net increase/(decrease) in operating assets	(51,210)	(30,839)
Increase (decrease) in operating liabilities	34,238	8,983
Income tax recovered/(paid)	(976)	(1,157)
CASH FLOWS FROM OPERATING ACTIVITIES	(1,700)	(7,132)
Investments (-)	(4,617)	(5,550)
Divestments (+)	2,970	12,040
CASH FLOWS FROM INVESTING ACTIVITIES	(1,647)	6,490
Proceeds from disposal of own equity instruments	560	587
Payments for acquisition of own equity instrument	(522)	(624)
Dividends paid	(2,110)	(1,936)
Other payments related to financing activities	(1,146)	(484)
CASH FLOWS FROM FINANCING ACTIVITIES	(6,299)	(811)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	87	(1,855)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(9,559)	(3,308)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	113,663	110,995
CASH AND CASH EQUIVALENTS AT END OF PERIOD	104,104	107,687
Banco Santander S.A. | Reportable Legal Entities [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Profit (loss)	543	1,295
Adjustments to profit	1,237	442
Net increase/(decrease) in operating assets	(27,955)	(12,498)
Increase (decrease) in operating liabilities	16,568	17,519
Income tax recovered/(paid)	882	555
CASH FLOWS FROM OPERATING ACTIVITIES	(8,725)	7,313
Investments (-)	(368)	(336)
Divestments (+)	1,042	586
CASH FLOWS FROM INVESTING ACTIVITIES	674	250
Proceeds from disposal of own equity instruments	452	438
Payments for acquisition of own equity instrument	(452)	(438)
Issuance of debt securities	1,056	2,750
Redemption of debt securities	(3,471)	(763)
Dividends paid	(2,111)	(1,936)
Other payments related to financing activities	(219)
CASH FLOWS FROM FINANCING ACTIVITIES	(4,745)	51
EFFECT OF FOREIGN EXCHANGE RATE CHANGES	38	148
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(12,758)	7,762
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	51,931	33,734
CASH AND CASH EQUIVALENTS AT END OF PERIOD	€ 39,173	€ 41,496

Additional disclosures - Prefer

Additional disclosures - Preference Shares and Preferred Securities (Details) - Financial liabilities at amortized cost - EUR (€) € in Millions	Jun. 30, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 21,419	€ 23,820
Subordinated liabilities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	8,296	10,063
Preference Shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	308	345
Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 7,988	€ 9,717

Additional disclosures - Pref_2

Additional disclosures - Preference Shares and Securities Detail (Details) £ / shares in Units, € in Millions, £ in Millions, $ in Millions	1 Months Ended	6 Months Ended
	Feb. 28, 2019USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2019GBP (£)£ / shares	Jun. 30, 2019EUR (€)	May 24, 2019	Feb. 28, 2019EUR (€)	Dec. 31, 2018EUR (€)
Disclosure of detailed information about financial instruments [line items]
Notional amount				€ 8,118			€ 8,118
Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				21,419			23,820
Subordinated liabilities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				8,296			10,063
Preference Shares | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				308			345
Preferred Securities | Financial liabilities at amortized cost
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				7,988			€ 9,717
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
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
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]
Interest rate (as a percent)					6.222%
Reference rate		LIBOR GBP 3M Rate
Par value per share | £ / shares			£ 1,000
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)		6.222%	6.222%	6.222%
Issuance By Santander UK PLC In May 2006 [Member] | LIBOR GBP 3M Interest Rate [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%
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
Interest rate (as a percent)		12.00%	12.00%	12.00%
Issuance By Banco Espanol De Credito In October 2004 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 36.5
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]
Variable interest rate ( as a percent)		0.125%	0.125%	0.125%
Issuance By Banco Espanol De Credito In November 2004 [Member] | 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]
Initial interest rate term		5 years
Reference rate		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 September 2014 [Member]
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term		5 years
Reference rate		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 By Banco Santander S.A. In February 2019 [Member]
Disclosure of detailed information about financial instruments [line items]
Interest rate (as a percent)	7.50%					7.50%
Initial interest rate term	5 years	5 years
Reprice term	5 years	5 years
Reference rate	5-year Mid-Swap Rate	5-year Mid-Swap Rate
Issuance By Banco Santander S.A. In February 2019 [Member] | CCPSs
Disclosure of detailed information about financial instruments [line items]
Notional amount	$ 1,200					€ 1,056
Issuance By Banco Santander S.A. In February 2019 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $		$ 1,200
Interest rate (as a percent)		7.50%	7.50%	7.50%
Issuance By Banco Santander S.A. In February 2019 [Member] | Euro 5Y Mid-Swap Rate
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.989%	4.989%	4.989%	4.989%		4.989%
Issuance By Santander Finance Preferred S.A. In September 2004 [Member] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount				€ 144
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]
Variable interest rate ( as a percent)		0.05%	0.05%	0.05%
Issuance By Santander Finance Preferred S.A. In October 2004 [Member] | 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] | Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $		$ 210.4
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]
Variable interest rate ( as a percent)		0.52%	0.52%	0.52%
Issuance By Santander Finance Preferred S.A. In July 2007 [Member] | 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 by Banco Popular Pastor FRN, June 2004 [Member] | 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		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		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
Reprice term		5 years
Reference rate		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%