Banco Santander (SAN) 6-K 26 Jul 24 2024 Q2 Current report (foreign) Financial data

Cover Page

Cover Page	6 Months Ended
	Jun. 30, 2024
Cover [Abstract]
Document Type	6-K
Entity File Number	001-12518
Entity Registrant Name	Banco Santander, S.A.
Entity Address, Address Line One	28660 Boadilla del Monte (Madrid)
Entity Address, Country	ES
Entity Central Index Key	0000891478
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Period End Date	Jun. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Balance Sheets - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
ASSETS
CASH, CASH BALANCES AT CENTRAL BANKS AND OTHER DEPOSITS ON DEMAND	€ 156,234	€ 220,342
FINANCIAL ASSETS HELD FOR TRADING	206,874	176,921
NON-TRADING FINANCIAL ASSETS MANDATORILY AT FAIR VALUE THROUGH PROFIT OR LOSS	6,166	5,910
FINANCIAL ASSETS DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS	9,169	9,773
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	82,270	83,308
FINANCIAL ASSETS AT AMORTISED COST	1,217,341	1,191,403
HEDGING DERIVATIVES	5,413	5,297
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RISK	(1,337)	(788)
INVESTMENTS	8,235	7,646
Joint venture entities	2,026	1,964
Associated entities	6,209	5,682
ASSETS UNDER REINSURANCE CONTRACTS	214	237
TANGIBLE ASSETS	33,709	33,882
Property, plant and equipment	32,764	32,926
Investment properties	945	956
INTANGIBLE ASSETS	19,359	19,871
Goodwill	13,668	14,017
Other intangible assets	5,691	5,854
TAX ASSETS	29,992	31,390
Current tax assets	10,017	10,623
Deferred tax assets	19,975	20,767
OTHER ASSETS	9,707	8,856
Insurance contracts linked to pensions	87	93
Inventories	6	7
Other	9,614	8,756
NON-CURRENT ASSETS HELD FOR SALE	2,915	3,014
TOTAL ASSETS	1,786,261	1,797,062
LIABILITIES
FINANCIAL LIABILITIES HELD FOR TRADING	133,856	122,270
FINANCIAL LIABILITIES DESIGNATED AT FAIR VALUE THROUGH PROFIT OR LOSS (**)	34,493	40,367
FINANCIAL LIABILITIES AT AMORTISED COST	1,454,896	1,468,703
HEDGING DERIVATIVES	5,535	7,656
CHANGES IN THE FAIR VALUE OF HEDGED ITEMS IN PORTFOLIO HEDGES OF INTEREST RATE RISK	12	55
LIABILITIES UNDER INSURANCE CONTRACTS	17,592	17,799
PROVISIONS	8,401	8,441
TAX LIABILITIES	9,802	9,932
Current tax liabilities	3,691	3,846
Deferred tax liabilities	6,111	6,086
OTHER LIABILITIES	18,026	17,598
LIABILITIES ASSOCIATED WITH NON-CURRENT ASSETS HELD FOR SALE	0	0
TOTAL LIABILITIES	1,682,613	1,692,821
SHAREHOLDERS´ EQUITY
SHAREHOLDERS´ EQUITY	132,836	130,443
CAPITAL	7,747	8,092
Called up paid capital	7,747	8,092
Unpaid capital which has been called up	0	0
SHARE PREMIUM	41,604	44,373
EQUITY INSTRUMENTS ISSUED OTHER THAN CAPITAL	735	720
Equity component of the compound financial instrument	0	0
Other equity instruments issued	735	720
OTHER EQUITY	189	195
ACCUMULATED RETAINED EARNINGS	82,324	74,114
REVALUATION RESERVES	0	0
OTHER RESERVES	(5,816)	(5,751)
(-) OWN SHARES	(6)	(1,078)
PROFIT ATTRIBUTABLE TO SHAREHOLDERS OF THE PARENT	6,059	11,076
(-) INTERIM DIVIDENDS	0	(1,298)
OTHER COMPREHENSIVE INCOME (LOSS)	(36,963)	(35,020)
ITEMS NOT RECLASSIFIED TO PROFIT OR LOSS	(5,118)	(5,212)
ITEMS THAT MAY BE RECLASSIFIED TO PROFIT OR LOSS	(31,845)	(29,808)
NON-CONTROLLING INTEREST	7,775	8,818
Other comprehensive income	(1,872)	(1,559)
Other items	9,647	10,377
TOTAL EQUITY	103,648	104,241
TOTAL LIABILITIES AND EQUITY	1,786,261	1,797,062
Pension and other post-retirement obligations
LIABILITIES
PROVISIONS	1,936	2,225
Other long term employee benefits
LIABILITIES
PROVISIONS	894	880
Taxes and other legal contingencies
LIABILITIES
PROVISIONS	2,631	2,715
Contingent liabilities and commitments
LIABILITIES
PROVISIONS	698	702
Other provisions
LIABILITIES
PROVISIONS	2,242	1,919
Loan commitments granted
SHAREHOLDERS´ EQUITY
MEMORANDUM ITEMS: OFF BALANCE SHEET AMOUNTS	290,151	279,589
Financial guarantees granted
SHAREHOLDERS´ EQUITY
MEMORANDUM ITEMS: OFF BALANCE SHEET AMOUNTS	15,598	15,435
Other commitments granted
SHAREHOLDERS´ EQUITY
MEMORANDUM ITEMS: OFF BALANCE SHEET AMOUNTS	127,420	113,273
For own-use
ASSETS
Property, plant and equipment	12,808	13,408
Leased out under an operating lease
ASSETS
Property, plant and equipment	19,956	19,518
Investment properties	€ 806	€ 851

Unaudited Condensed Consolida_2

Unaudited Condensed Consolidated Income Statements - EUR (€) € in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
IFRS Statement [Line Items]
Interest income		€ 56,838	€ 49,922
Interest expense		(33,381)	(29,002)
Interest income/ (charges)		23,457	20,920
Dividend income		493	382
Income from companies accounted for using the equity method		303	296
Commission income		8,738	8,277
Commission expense		(2,261)	(2,174)
Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net		20	22
Gain or losses on financial assets and liabilities held for trading, net		441	263
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss		314	26
Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net		427	(194)
Gain or losses from hedge accounting, net		14	108
Exchange differences, net		(259)	1,077
Other operating income	[1]	409	480
Other operating expenses		(1,391)	(1,504)
Income from insurance and reinsurance contracts		249	414
Expenses from insurance and reinsurance contracts		(239)	(383)
Total income		30,715	28,010
Administrative expenses		(11,257)	(10,873)
Staff costs		(7,061)	(6,603)
Other general and administrative expenses		(4,196)	(4,270)
Depreciation and amortisation cost		(1,656)	(1,606)
Provisions or reversal of provisions, net		(1,762)	(1,330)
Impairment or reversal of impairment of financial assets not measured at fair value through profit or loss and net gains and losses from modifications		(6,577)	(6,237)
Impairment of investments in subsidiaries, joint ventures and associates, net		0	0
Impairment on non-financial assets, net		(290)	(92)
Tangible assets		(183)	(78)
Intangible assets		(105)	(5)
Others		(2)	(9)
Gain or losses on non financial assets and investments, net		366	277
Gains or losses on non-current assets held for sale not classified as discontinued operations		(31)	(59)
Operating profit/(loss) before tax		9,508	8,090
Tax expense or income from continuing operations		(2,916)	(2,281)
Profit/(loss) for the period from continuing operations		6,592	5,809
Profit/( loss) after tax from discontinued operations		0	0
Profit/(loss) for the period		6,592	5,809
Profit attributable to non-controlling interests		533	568
Profit/(loss) attributable to the parent		€ 6,059	€ 5,241
Earnings/(losses) per share
Basic (in euro per share)		€ 0.37	€ 0.31
Diluted (in euro per share)		€ 0.37	€ 0.31
Other financial assets and liabilities
IFRS Statement [Line Items]
Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net		€ 63	€ 16
Financial assets at fair value through other comprehensive income
IFRS Statement [Line Items]
Interest income		3,426	3,629
Impairment or reversal of impairment of financial assets not measured at fair value through profit or loss and net gains and losses from modifications		(8)	6
Financial assets at amortised cost
IFRS Statement [Line Items]
Interest income		42,198	37,503
Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net		(43)	6
Impairment or reversal of impairment of financial assets not measured at fair value through profit or loss and net gains and losses from modifications		(6,569)	(6,243)
Other interest income
IFRS Statement [Line Items]
Interest income		11,214	8,790
Reclassification of financial assets at fair value through other comprehensive income
IFRS Statement [Line Items]
Gain or losses on financial assets and liabilities held for trading, net		0	0
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss		0	0
Reclassification of financial assets at amortised cost
IFRS Statement [Line Items]
Gain or losses on financial assets and liabilities held for trading, net		0	0
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss		0	0
Other gains (losses)
IFRS Statement [Line Items]
Gain or losses on financial assets and liabilities held for trading, net		441	263
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss		€ 314	€ 26
[1]Includes EUR -687 million at 30 June 2024 (EUR -574 million at 30 June 2023) derived from the net monetary loss generated in Argentina as a result of the application of IAS 29 Financial reporting in hyperinflationary economies.

Unaudited Condensed Consolida_3

Unaudited Condensed Consolidated Income Statements (Parenthetical) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
ARGENTINA
IFRS Statement [Line Items]
Gains (losses) on net monetary position	€ (687)	€ (574)

Unaudited Condensed Consolida_4

Unaudited Condensed Consolidated Statements of Recognized Income and Expense - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of comprehensive income [abstract]
CONSOLIDATED PROFIT/(LOSS) FOR THE PERIOD	€ 6,592	€ 5,809
OTHER RECOGNISED INCOME AND EXPENSE	(2,393)	2,091
Items that will not be reclassified to profit or loss	(29)	(489)
Actuarial gains and losses on defined benefit pension plans	(59)	(402)
Non-current assets held for sale	0	0
Other recognised income and expense of investments in subsidiaries, joint ventures and associates	(4)	(5)
Changes in the fair value of equity instruments measured at fair value through other comprehensive income	107	(201)
Gains or losses resulting from the accounting for hedges of equity instruments measured at fair value through other comprehensive income, net	0	0
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedged item)	4	(41)
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedging instrument)	(4)	41
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(90)	(50)
Income tax relating to items that will not be reclassified	17	169
Items that may be reclassified to profit or loss	(2,364)	2,580
Hedges of net investments in foreign operations (effective portion)	101	(1,527)
Revaluation gains (losses)	101	(1,527)
Amounts transferred to income statement	0	0
Other reclassifications	0	0
Exchange differences	(1,932)	3,094
Revaluation gains (losses)	(1,932)	3,056
Amounts transferred to income statement	0	38
Other reclassifications	0	0
Cash flow hedges (effective portion)	(403)	596
Revaluation gains (losses)	(887)	(1,318)
Amounts transferred to income statement	484	1,914
Transferred to initial carrying amount of hedged items	0	0
Other reclassifications	0	0
Hedging instruments (items not designated)	0	0
Revaluation gains (losses)	0	0
Amounts transferred to income statement	0	0
Other reclassifications	0	0
Debt instruments at fair value with changes in other comprehensive income	(325)	790
Revaluation gains (losses)	(291)	782
Amounts transferred to income statement	(34)	8
Other reclassifications	0	0
Non-current assets held for sale	0	0
Revaluation gains (losses)	0	0
Amounts transferred to income statement	0	0
Other reclassifications	0	0
Share of other recognised income and expense of investments	(57)	88
Income tax relating to items that may be reclassified to profit or loss	252	(461)
Total recognised income and expenses for the year	4,199	7,900
Attributable to non-controlling interests	220	937
Attributable to the parent	€ 3,979	€ 6,963

Unaudited Condensed Consolida_5

Unaudited Condensed Consolidated Statements of Changes in Total Equity - EUR (€) € in Millions	Total	Capital	Share premium	Equity instruments issued (not capital)	Other equity instruments	Accumulated retained earnings	Revaluation reserves	Other reserves	(-) Own shares	Profit Attributable to shareholders of the parent	(-) Interim dividends	Other comprehensive income	Non-Controlling interest, Other comprehensive income	Non-Controlling interest, Other items
Equity at beginning of period (Previously stated) at Dec. 31, 2022	€ 97,585	€ 8,397	€ 46,273	€ 688	€ 175	€ 66,702	€ 0	€ (5,454)	€ (675)	€ 9,605	€ (979)	€ (35,628)	€ (1,856)	€ 10,337
Equity at beginning of period (Adjustments due to changes in accounting policies) at Dec. 31, 2022	0
Equity at beginning of period (Adjustments due to errors) at Dec. 31, 2022	0
Equity at beginning of period at Dec. 31, 2022	97,585	8,397	46,273	688	175	66,702	0	(5,454)	(675)	9,605	(979)	(35,628)	(1,856)	10,337
Total recognised income and expense	7,900									5,241		1,722	369	568
Other changes in equity	(3,441)	(305)	(1,900)	16	21	7,410		41	628	(9,605)	979	117	3	(846)
Issuance of ordinary shares	1													1
Issuance of preferred shares	0
Issuance of other financial instruments	0
Maturity of other financial instruments	0
Conversion of financial liabilities into equity	0
Capital reduction	0	(305)	(1,900)					305	1,900
Dividends recognised as distributions to owners	(1,399)					(963)
Dividends recognised as distributions to non-controlling interests														(436)
Purchase of equity instruments	(1,723)								(1,723)
Disposal of equity instruments	462							11	451
Transfer from equity to liabilities	0
Transfer from liabilities to equity	0
Transfers between equity items	0					8,373		136		(9,605)	979	117	3	(3)
Increases (decreases) due to business combinations	(304)													(304)
Share-based payment	(66)				(66)
Others increases or (-) decreases of the equity	(412)			16	87			(411)						(104)
Equity at end of period at Jun. 30, 2023	102,044	8,092	44,373	704	196	74,112	0	(5,413)	(47)	5,241	0	(33,789)	(1,484)	10,059
Equity at beginning of period (Previously stated) at Dec. 31, 2023	104,241	8,092	44,373	720	195	74,114	0	(5,751)	(1,078)	11,076	(1,298)	(35,020)	(1,559)	10,377
Equity at beginning of period (Adjustments due to changes in accounting policies) at Dec. 31, 2023	0
Equity at beginning of period (Adjustments due to errors) at Dec. 31, 2023	0
Equity at beginning of period at Dec. 31, 2023	104,241	8,092	44,373	720	195	74,114	0	(5,751)	(1,078)	11,076	(1,298)	(35,020)	(1,559)	10,377
Total recognised income and expense	4,199									6,059		(2,080)	(313)	533
Other changes in equity	(4,792)	(345)	(2,769)	15	(6)	8,210		(65)	1,072	(11,076)	1,298	137	0	(1,263)
Issuance of ordinary shares	0
Issuance of preferred shares	0
Issuance of other financial instruments	0
Maturity of other financial instruments	(590)													(590)
Conversion of financial liabilities into equity	0
Capital reduction	(93)	(345)	(2,769)					345	2,769					(93)
Dividends recognised as distributions to owners	(2,088)					(1,485)
Dividends recognised as distributions to non-controlling interests														(603)
Purchase of equity instruments	(2,159)								(2,159)
Disposal of equity instruments	468							6	462
Transfer from equity to liabilities	0
Transfer from liabilities to equity	0
Transfers between equity items	0					9,695		(54)		(11,076)	1,298	137
Increases (decreases) due to business combinations	0
Share-based payment	(55)				(55)
Others increases or (-) decreases of the equity	(275)			15	49			(362)						23
Equity at end of period at Jun. 30, 2024	€ 103,648	€ 7,747	€ 41,604	€ 735	€ 189	€ 82,324	€ 0	€ (5,816)	€ (6)	€ 6,059	€ 0	€ (36,963)	€ (1,872)	€ 9,647

Unaudited Condensed Consolida_6

Unaudited Condensed Consolidated Statements of Cash Flows - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Statement of cash flows [abstract]
CASH FLOWS FROM OPERATING ACTIVITIES	€ (60,172)	€ (11,895)
Profit/(loss) for the period	6,592	5,809
Adjustments made to obtain the cash flows from operating activities	13,925	13,720
Depreciation and amortisation cost	1,656	1,606
Other adjustments	12,269	12,114
Net increase/(decrease) in operating assets	82,440	45,762
Financial assets held-for-trading	35,042	23,291
Non-trading financial assets mandatorily at fair value through profit or loss	402	120
Financial assets at fair value through profit or loss	(592)	647
Financial assets at fair value through other comprehensive income	1,295	(1,819)
Financial assets at amortised cost	45,626	26,151
Other operating assets	667	(2,628)
Net increase/(decrease) in operating liabilities	3,232	15,842
Financial liabilities held-for-trading	13,709	16,830
Financial liabilities designated at fair value through profit or loss	(5,968)	(4,202)
Financial liabilities at amortised cost	(1,103)	4,132
Other operating liabilities	(3,406)	(918)
Income tax recovered/(paid)	(1,481)	(1,504)
CASH FLOWS FROM INVESTING ACTIVITIES	(2,301)	(2,498)
Payments	6,034	6,832
Tangible assets	4,738	4,705
Intangible assets	909	954
Investments	362	25
Subsidiaries and other business units	25	1,148
Non-current assets held for sale and associated liabilities	0	0
Other payments related to investing activities	0	0
Proceeds	3,733	4,334
Tangible assets	2,991	2,737
Intangible assets	0	0
Investments	294	374
Subsidiaries and other business units	4	838
Non-current assets held for sale and associated liabilities	444	385
Other proceeds related to investing activities	0	0
CASH FLOWS FROM FINANCING ACTIVITIES	(4,173)	(2,358)
Payments	8,587	4,623
Dividends	1,485	963
Subordinated liabilities	3,210	748
Redemption of own equity instruments	0	0
Acquisition of own equity instruments	2,159	1,723
Other payments related to financing activities	1,733	1,189
Proceeds	4,414	2,265
Subordinated liabilities	3,908	1,654
Issuance of own equity instruments	0	0
Disposal of own equity instruments	471	467
Other proceeds related to financing activities	35	144
EFFECT OF FOREIGN EXCHANGE RATE DIFFERENCES	2,538	1,224
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(64,108)	(15,527)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	220,342	223,073
CASH AND CASH EQUIVALENTS AT END OF PERIOD	156,234	207,546
COMPONENTS OF CASH AND CASH EQUIVALENTS AT END OF PERIOD
Cash	7,113	8,195
Cash equivalents at central banks	134,228	186,134
Other financial assets	14,893	13,217
Less: Bank overdrafts refundable on demand	0	0
TOTAL CASH AND CASH EQUIVALENTS AT END OF PERIOD	156,234	207,546
In which: restricted cash	€ 0	€ 0

Introduction, basis of presenta

Introduction, basis of presentation of the interim condensed consolidated financial statements and other information	6 Months Ended
	Jun. 30, 2024
Disclosure of reclassifications or changes in presentation [abstract]
Introduction, basis of presentation of the interim condensed consolidated financial statements and other information	Introduction, basis of presentation of the interim condensed consolidated financial statements and other information a) Introduction Banco Santander, S.A. ('the parent' 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, Banco Santander is the head of a group of subsidiaries that engage in various business activities and which compose, together with it, Grupo Santander ('Santander' or 'The Group'). Grupo Santander's interim condensed consolidated financial statements ('interim financial statements') for the six-month period ended 30 June 2024 were authorised and approved by Grupo Santander's directors at the board of directors meeting held on 23 July 2024. Grupo Santander's consolidated annual accounts for year 2023 were approved by shareholders at Banco Santander annual general meeting on 22 March 2024. b) Basis of presentation of the interim financial statements Under Regulation (EC) n.º 1606/2002 of the European Parliament and of the Council of 19 July 2002 all companies governed by the law of an EU Member State and whose securities are admitted to trading on a regulated market of any Member State must prepare their consolidated financial statements for the years beginning on or after 1 January, 2005 in conformity with the International Financial Reporting Standards ('IFRS') previously adopted by the European Union ('EU-IFRS'). In order to adapt the accounting system of Spanish credit institutions with the principles and criteria established by the IFRS adopted by the European Union ('EU-IFRS'), the Bank of Spain published circular 4/2017, dated 27 November 2017, and subsequent changes, on Public and Confidential Financial Reporting Standards and Financial Statement Formats. The consolidated annual accounts for 2023 were authorised at the board of directors meeting on 19 February 2024 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 Grupo Santander’s consolidated equity and consolidated financial position at 31 December 2023 and the consolidated results of its operations, and the consolidated cash flows in 2022. The aforementioned consolidated annual accounts, which are included in Grupo Santander’s Form 20-F filed with the U.S. Securities and Exchange Commission on 21 February 2024, 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 financial statements in accordance with the provisions of article 12 of Royal Decree 1362/2007 taking into account the requirements of Circular 3/2018, of June 28, of the Securities and Exchange Commission (CNMV). These interim financial statements will be included in the Half-Yearly Financial Information corresponding to the first half of 2024 that the Group presents in accordance with the aforementioned Circular 3/2018. In accordance with IAS 34, 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 first six months, 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 IFRS and, accordingly, for a proper comprehension of the information included in these interim financial statements, they should be read together with Grupo Santander’s consolidated annual accounts for the year ended 31 December 2023. Grupo Santander 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 2023. 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 Grupo Santander. The accounting policies and methods used in preparing these interim financial statements are the same as those applied in the consolidated annual accounts for 2023 taking into account the standards and interpretations with effective application date during the first six months of 2024, which are detailed below: • Amendment to IFRS 16 Lease Liability in a Sale and Leaseback requires a seller-lessee to subsequently measure lease liabilities arising from a leaseback without recognising any amount of the gain or loss that relates to the right of use retained. This new requirement does not prevent a seller-lessee from recognising in profit or loss any gain or loss relating to the partial or full termination of a lease. Applicable, retrospectively, from 1 January 2024. • Classification of Liabilities, amendments to IAS 1 Presentation of Financial Statements, considering non-current liabilities those in which the entity has the possibility of deferring payment for more than 12 months from the closing date of the reporting period. Likewise, an additional amendment to IAS 1 on the classification of liabilities with covenants as current or non-current has been approved, specifying that covenants that must be complied with after the reporting date do not affect the classification of liabilities and require additionally their respective breakdowns. They should be applied retrospectively in accordance with the normal requirements of IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. Applicable from 1 January 2024. • IAS 7 Statement of Cash Flows and IFRS 7 Financial Instruments: Additional disclosures are required for companies entering into supplier financing arrangements. The objective of the new disclosures is to provide information on Supplier Finance Arrangements (SFA) that allows investors to evaluate the effects on an entity's liabilities, cash flows and liquidity risk exposure (effective from 1 January 2024). The aforementioned accounting standards and modifications have not had a significant effect on Grupo Santander’s financial statements, except for what was disclosed before. All accounting policies and measurement bases with a material effect on the interim financial statements for 30 June 2024 were applied in their preparation. By the time of the preparation of these interim financial statements, there are no standards pending adoption by the European Union for the current exercise by the IASB with an effective date of 1 January 2024. 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 Banco Santander 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 2023, except for those indicated in these interim financial statements due to the accounting standards and modifications that have come into effect during the first six months of the year 2024. The interim financial statements contain estimates made by the senior management of Banco Santander and of the consolidated entities in order to quantify certain of the assets, liabilities, income, expenses and obligations reported in the consolidated entities. These estimates, which were made on the basis of the best information available, relate mainly to the following: • The income tax expense, which is recognised in interim periods based on the best estimate of the weighted average tax rate expected by Grupo Santander for the full financial year; • 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; • The assumptions used in the calculation of the post-employment benefit liabilities and commitments and other obligations; • The useful life of the tangible and intangible assets; • The measurement of goodwill impairment arising on consolidation; • The calculation of provisions and the consideration of contingent liabilities; • The fair value of certain unquoted assets and liabilities; • The recoverability of deferred tax assets; and • The fair value of the identifiable assets acquired and the liabilities assumed in business combinations in accordance with IFRS 3. To update the previous estimates, the Group's management has taken into account the current macroeconomic scenario resulting from the complex geopolitical situation, the levels of inflation and interest rates, as well as the resilience of the labour market being a priority monitoring focus due to the potential uncertainty generated in the Group's estimates. The Group's management has evaluated in particular the uncertainties caused by the current environment in relation to credit, liquidity and market risks, taking into account the best available information, to estimate the impact on the credit portfolio's impairment provision, and in the debt instruments' interest rates and valuation. In addition, the Group has applied in the interim financial statements a new theoretical exchange rate for the Argentine peso (1,499 pesos on 30 June 2024). This decision is due to the significant divergence that has been observed between the official exchange rate and other macroeconomic magnitudes, mainly inflation. The new theoretical exchange rate also reflects the implicit exchange rate observed in certain transactions ordered between market participants under the prevailing economic conditions, such as the repatriation of dividends from businesses in Argentina. This matter has not had a material impact in the Group’s interim financial statements. During the six-month period ended 30 June 2024, there have been no additional significant changes in the estimates made at the end of 2023, other than those indicated in these interim financial statements. d) Contingent assets and liabilities Note 25 to Grupo Santander's consolidated annual accounts for the year ended 31 December 2023 includes information on the contingent assets and liabilities at that date. There were no significant changes in Grupo Santander's contingent assets and liabilities from 31 December 2023 to the date of formal preparation of these interim financial statements. e) Comparative information The information in Note 12 related to segment information for March 2023 has been restated, in accordance with the new organizational structure of Grupo Santander, as required by IFRS 8 (see note 12). In order to interpret the changes in the balances with respect to 31 December 2023, 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 annual year ended 31 December 2023) and the impact of the appreciation/depreciation of the various currencies against the euro in the first six months of 2024: Mexican peso (-4.45%), US dollar (3.18%), Brazilian real (-9.73%), Pound sterling (2.38%), Chilean peso (-4.57%) and Polish zloty (0.82%); as well as the evolution of the average exchange rates between comparable periods: Mexican peso (6.12%), US dollar (-0.06%), Brazilian real (-0.21%), Pound sterling (2.52%), Chilean peso (-14.30%) and Polish zloty (7.11%). f) Seasonality of the Grupo Santander’s transactions The business activities carried on by Grupo Santander 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 30 June 2024. g) Materiality In determining the note disclosures to be made on the various items in the interim financial statements or other matters, Grupo Santander, in accordance with IAS 34, took into account their materiality in relation to the interim financial statements for the six-month period ended 30 June 2024. h) Other information On 28 December 2022, the law establishing a temporary levy on credit institutions and financial credit establishments was published in Spain. On 1 January 2024, an amount of EUR 335 million (EUR 224 million on 1 January 2023) was recorded under the heading "Other operating expenses" in the profit and loss account in accordance with IFRIC 21 due to this new tax. i) Events after the reporting period From 1 July 2024 and up to the date of issuance of these interim financial statements corresponding to the first six months of 2024, there have been no relevant events other than those indicated in the interim financial statements.

Grupo Santander

Grupo Santander	6 Months Ended
	Jun. 30, 2024
Disclosure of detailed information about business combination [abstract]
Grupo Santander	Grupo Santander Appendices I, II and III to the consolidated annual accounts for the year ended 31 December 2023 provide relevant information on Grupo Santander 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 Grupo Santander in 2023, 2022 and 2021. During the first six months of 2024, no significant operations have been carried out or those are pending execution at 30 June 2023.

Shareholder remuneration system

Shareholder remuneration system and earnings per share	6 Months Ended
	Jun. 30, 2024
Earnings per share [abstract]
Shareholder remuneration system and earnings per share	Shareholder remuneration system and earnings per share a) Shareholder remuneration system The cash remuneration paid by Banco Santander to its shareholders in the first six months of 2024 and 2023 was as follows: 30-06-2024 30-06-2023 % of par Euros per Amount % of par Euros per Amount Ordinary shares 0.1917 0.095 1,485 11.90 % 0.0595 963 Other shares (without vote, redeemable, etc.) — — — — — — Total remuneration paid 0.1917 0.095 1,485 11.90 % 0.0595 963 Dividend paid out of profit 0.1917 0.095 1,485 11.90 % 0.0595 963 Dividend paid with a charge to reserves or share premium — — — — — — Dividend in kind — — — — — — Flexible payment — — — — — — At the board of directors held on 22 March 2024, it was agreed to pay an interim dividend in cash against 2023 results of EUR 9.50 cents per share agreed by the board of directors on 19 February 2024, which became effective on 2 May 2024. In addition, the general meeting of shareholders approved the implementation of a share repurchase program agreed by the board of directors for a maximum amount of 1,459 million euros, which began on 20 February 2024 and finalized on 21 June 2024. In the general meeting of shareholders on 31 March 2023 it was approved the payment of a complementary dividend in cash charged to the results of the financial year 2022, agreed at the board of directors on 27 February 2023, of EUR 5.95 cents per share that was effective as of 2 May 2023. Likewise, the implementation of a share repurchase program charged to income for the year of 2022 agreed by this board of directors for a maximum amount of EUR 921 million, completed in April 2023, was also approved. 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 Grupo Santander for the first six months 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: 30-06-2024 30-06-2023 Profit attributable to the Parent (EUR million) 6,059 5,241 Remuneration of contingently convertible preferred securities (CCPS) (EUR million) (309) (229) 5,750 5,012 Of which: Profit or Loss from discontinued operations (non controlling interest net) (EUR million) — — Profit or Loss from continuing operations (CCPS net) (EUR million) 5,750 5,012 Weighted average number of shares outstanding 15,664,707,190 16,279,041,269 Basic earnings per share (euros) 0.37 0.31 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.37 0.31 ii. Diluted earnings per share Diluted earnings per share for the period are calculated by dividing the net profit attributable to Grupo Santander for the first six months 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: 30-06-2024 30-06-2023 Profit attributable to the Parent (EUR million) 6,059 5,241 Remuneration of contingently convertible preferred securities (CCPS) (EUR million) (309) (229) 5,750 5,012 Of which: Profit or Loss from discontinued operations (non controlling interest net) (EUR million) — — Profit or Loss from continuing operations (CCPS net) (EUR million) 5,750 5,012 Weighted average number of shares outstanding 15,664,707,190 16,279,041,269 Dilutive effect of options/receipt of shares 70,622,287 67,704,709 Adjusted number of shares 15,735,329,477 16,346,745,978 Diluted earnings per share (euros) 0.37 0.31 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.37 0.31

Remuneration and other benefits

Remuneration and other benefits paid to Banco Santander’s directors and senior managers	6 Months Ended
	Jun. 30, 2024
Remuneration And Other Benefits [Abstract]
Remuneration and other benefits paid to Banco Santander’s directors and senior managers	Remuneration and other benefits paid to Banco Santander’s directors and senior managers Note 5 to Grupo Santander’s consolidated annual accounts for the year ended 31 December 2023 details the remuneration and other benefits to members of Banco Santander’s Board of Directors and senior management in 2023. Following is a summary of the most significant data on the remunerations and benefits for the six-month periods ended 30 June 2024 and 2023: Remuneration of members of the board of directors (1) EUR thousand 30-06-2024 30-06-2023 Members of the board of directors: (2) Remuneration concept Fixed salary remuneration of executive directors 3,292 3,136 Variable salary remuneration of executive directors — — Directors' fees 597 628 Bylaw-stipulated emoluments (annual emolument) 1,754 2,113 Other 2,173 2,083 Sub-total 7,816 7,960 Transactions with shares and/or other financial instruments — — 7,816 7,960 1. The Notes to the consolidated annual accounts for 2024 will contain detailed and complete information on the remuneration paid to all the directors, including executive directors. 2. From 1 October 2023, the Lead Independent Director, non-executive Vice Chair and Chair of remuneration committee is Mr. Glenn Hutchins, succeeding Mr. Carnegie-Brown. From 27 June 2024, Mr. Carlos Barrabés, in replacement of Mr. Ramiro Mato, and Mr. Antonio Francesco Weiss joined the board. Mr. Bruce Carnegie-Brown stepped down as member of the board on 23 March 2024. Mr. Ramiro Mato stepped down as member of the board on 27 June 2024. Other benefits of members of the board of directors EUR thousand 30-06-2024 30-06-2023 Members of the board of directors Other benefits Advances — — Loans granted 99 144 Pension funds and plans: Endowments and/or contributions (1) 1,197 1,055 Pension funds and plans: Accumulated rights (2) 73,481 66,792 Life insurance premiums 720 563 Guarantees provided for directors — — 1. These correspond to the endowments and/or contributions made during the first six months of 2024 and 2023 in respect of retirement pensions, widowhood, orphanhood and permanent disability. 2. Corresponds to the rights accru ed by the directors in matters of pensions. Additionally, former members of the board had at 30 June 2024 and 30 June 2023 rights accrued for this concept for EUR 44,456 thousand and EUR 46,275 thousand, respectively. Remuneration of senior management (1)(2) The table below includes the corresponding amounts related to remunerations of senior management at 30 June 2024 and 2023, excluding the executive directors: EUR thousand 30-06-2024 30-06-2023 Senior management (1) Total remuneration of senior management (2) 13,423 12,761 1. Remunerations received during the first six months by members of the senior management who ce ased in their functions by 30 June 2024, amounted to EUR 2,594 thousand (EUR 511 thousand by 30 June 2023). 2. The number of members of Banco Santander's senior management, excluding executive directors, is 13 as at 30 June 2024 ( 14 persons at 30 June 2023) The variable annual remuneration (or bonuses) received for fiscal year 2023, 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 2024 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 EUR thousand 30-06-2024 30-06-2023 Senior management (1) Pension funds: Endowments and / or contributions (2) 2,376 2,550 Pension funds: Accumulated rights (3) 59,672 55,451 1. Contributions made during the first six months to members of the senior manage ment who ceased in their functions by 30 June 2024, amounted to EUR 168 thousand (EUR 108 thousand by 30 June 2023). 2. Corresponds to the allocations and/or contributions made during the first six months of 2024 and 2023 as retirement pensions. 3. Corresponds to the rights accrued by members of senior management in the area of pensions. In addition, former members of senior management had at 30 June 2024 and 30 June 2023 rights accumulated for this same concept for EUR 83,485 thousand and EUR 90,401 thousand, respectively.

Financial assets

Financial assets	6 Months Ended
	Jun. 30, 2024
Disclosure of financial assets [abstract]
Financial assets	Financial assets a) Breakdown The detail, by nature and category for measurement purposes, of Grupo Santander's financial assets, other than the balances relating to Cash, cash balances at central banks and other deposits on demand and Hedging derivatives, at 30 June 2024 and 31 December 2023 is as follows, presented by the nature and categories for valuation purposes: EUR million 30-06-2024 Financial Non-trading Financial Financial Financial Derivatives 58,928 Equity instruments 16,764 4,432 1,842 Debt instruments 71,523 684 3,174 71,160 114,347 Loans and advances 59,659 1,050 5,995 9,268 1,102,994 Central Banks 17,283 — — — 16,541 Credit institutions 22,477 — 444 335 56,290 Customers 19,899 1,050 5,551 8,933 1,030,163 Total 206,874 6,166 9,169 82,270 1,217,341 EUR million 31-12-2023 Financial Non-trading Financial Financial Financial Derivatives 56,328 Equity instruments 15,057 4,068 1,761 Debt instruments 62,124 860 3,095 73,565 103,559 Loans and advances 43,412 982 6,678 7,982 1,087,844 Central Banks 17,717 — — — 20,082 Credit institutions 14,061 — 459 313 57,917 Customers 11,634 982 6,219 7,669 1,009,845 Total 176,921 5,910 9,773 83,308 1,191,403 Following is the gross exposure of financial assets subject to impairment stages at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Gross amount Gross amount Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Financial assets at fair value through other comprehensive income 79,697 651 281 80,629 81,183 305 192 81,680 Debt instruments 71,163 13 6 71,182 73,570 — 6 73,576 Loans and advances 8,534 638 275 9,447 7,613 305 186 8,104 Credit institutions 335 — — 335 313 — — 313 Customers 8,199 638 275 9,112 7,300 305 186 7,791 Financial assets at amortised cost 1,116,202 89,495 33,785 1,239,482 1,102,968 76,552 34,090 1,213,610 Debt instruments 113,462 501 698 114,661 103,127 203 455 103,785 Loans and advances 1,002,740 88,994 33,087 1,124,821 999,841 76,349 33,635 1,109,825 Central Banks 16,541 — — 16,541 20,082 — — 20,082 Credit institutions 56,294 — — 56,294 57,926 — — 57,926 Customers 929,905 88,994 33,087 1,051,986 921,833 76,349 33,635 1,031,817 Total 1,195,899 90,146 34,066 1,320,111 1,184,151 76,857 34,282 1,295,290 On 30 June 2024, Grupo Santander has EUR 674 million (EUR 743 million on 31 December 2023) of exposure in impaired assets purchased with impairment, of which EUR 252 million still show signs of impairment, which mainly correspond to the business combinations carried out by Grupo Santander. b) Impairment allowances of financial assets at amortised cost portfolio The following is the movement that has taken place, during the six-month periods ended 30 June 2024 and 2023, 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: EUR million 30-06-2024 30-06-2023 Balance as at beginning of period 22,950 22,888 Impairment losses charged to income for the period 7,112 6,843 Of which: Impairment losses charged to income 13,186 11,225 Impairment losses reversed with a credit to income (6,074) (4,382) Perimeter change — (37) Write-off of impaired balances against recorded impairment allowance (6,439) (6,831) Exchange differences and other (808) 492 Balance as at end of period 22,815 23,355 Of which, relating to: Impaired assets 14,429 14,271 Other assets 8,386 9,084 Of which: Individually calculated 2,964 2,858 Collectively calculated 19,851 20,497 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 30 June 2024 and 30 June 2023: EUR million 30-06-2024 Stage 1 Stage 2 Stage 3 Total Impairment allowance as at beginning of period 3,587 4,930 14,149 22,666 Transfers between stages (627) 609 3,941 3,923 Net changes of the exposure and modifications in the credit risk 530 (423) 2,962 3,069 Write-offs — — (6,439) (6,439) Exchange differences and other (186) (78) (509) (773) Carrying amount at end of period 3,304 5,038 14,104 22,446 EUR million 30-06-2023 Stage 1 Stage 2 Stage 3 Total Impairment allowance as at beginning of period 3,611 5,124 13,931 22,666 Transfers between stages (454) 355 3,767 3,668 Variation due to credit risk 605 (377) 2,891 3,119 Write-offs — — (6,801) (6,801) Exchange differences and other 88 97 249 434 Carrying amount at end of period 3,850 5,199 14,037 23,086 Previously written-off assets recovered during the first six months of 2024 and 2023 amount to EUR 803 million and to EUR 864 million, respectively. In addition, during the first six months of 2024 EUR 260 million (EUR 264 million during the first six months of 2023) were recognized for losses in the income statement due to renegotiation or contractual modifications mainly due to the CHF mortgage portfolio in Poland. Considering these amounts, the recorded impairment of financial assets at amortised cost is EUR 6,569 million and EUR 6,243 million during the first six months of 2024 and 2023, respectively. c) Impaired assets of financial assets at amortised cost portfolio The movement during the six-month periods ended 30 June 2024 and 2023, in the balance of financial assets classified at amortised cost and considered impaired by reason for the credit risk is as follows: EUR million 30-06-2024 30-06-2023 Balance as at beginning of period 34,363 33,269 Net additions 6,747 6,480 Written-off assets (6,439) (6,831) Perimeter Changes 13 (45) Exchange differences and other (647) 773 Balance at end of period 34,037 33,646 This amount, after deducting the related allowances, represents Grupo Santander's best estimate of the discounted value of the flows that are expected to be recovered from the impaired assets. Following is the breakdown of the value of the collaterals received to ensure the collection of the financial assets that comprise the heading of financial assets at amortized cost, distinguishing between real collaterals and other collaterals at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Real collaterals value 639,735 630,939 Of which: Impaired 12,920 12,894 Other collaterals value 94,442 96,164 Of which: Impaired 1,917 2,131 Total value of the collaterals received 734,177 727,103 e) Fair value of financial assets not measured at fair value Following is a comparison of the carrying amounts of Grupo Santander’s financial assets measured at other than fair value and their respective fair values at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Carrying amount Fair value Carrying amount Fair value Loans and advances 1,102,994 1,091,255 1,087,844 1,077,543 Debt instruments 114,347 112,141 103,559 102,888 ASSETS 1,217,341 1,203,396 1,191,403 1,180,431 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 2023.

Non-current assets held for sal

Non-current assets held for sale	6 Months Ended
	Jun. 30, 2024
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract]
Non-current assets held for sale	Non-current assets held for sale The detail, by nature, of Grupo Santander’s non-current assets held for sale at 30 June 2024 and 31 December 2023 is as follows presented by nature: EUR million 30-06-2024 31-12-2023 Tangible assets 2,892 2,991 Of which: Foreclosed assets 2,668 2,773 Of which: Property assets in Spain 2,037 2,138 Other tangible assets held for sale 224 218 Other assets 23 23 2,915 3,014 The balance of the provisions at 30 June 2024 is EUR 2,784 million (EUR 2,956 million at 31 December 2023). The charges recorded in the first six months of 2024 and 2023 amounted to EUR 80 million and EUR 63 million, respectively, and the recoveries undergone during those periods amount to EUR 25 million and EUR 16 million, respectively.

Tangible assets

Tangible assets	6 Months Ended
	Jun. 30, 2024
Property, plant and equipment [abstract]
Tangible assets	Tangible assets a) Changes in the period In the first six months of 2024 and 2023, tangible assets (rights of use are not included) were acquired for EUR 4,738 million and EUR 4,705 million, respectively. Likewise, in the first six months of 2024 and 2023 tangible asset items were disposed of with a carrying amount of EUR 2,979 million and EUR 2,713 million, generating a net profit of EUR 12 million and EUR 24 million, respectively. b) Property, plant and equipment purchase commitments At 30 June 2024 and 2023, Grupo Santander did not have any significant commitments to purchase property, plant and equipment items. c) Leasing rights As of 30 June 2024, Grupo Santander has tangible assets under lease for the amount of EUR 1,999 million (EUR 2,182 million at 31 December 2023).

Intangible assets

Intangible assets	6 Months Ended
	Jun. 30, 2024
Intangible assets and goodwill [abstract]
Intangible assets	Intangible assets The detail of Intangible Assets - Goodwill at 30 June 2024 and 31 December 2023, based on the cash-generating units giving rise thereto, is as follows: EUR million 30-06-2024 31-12-2023 Banco Santander (Brazil) 3,321 3,679 SAM Investment Holdings Limited 1,444 1,444 Santander Consumer Germany 1,304 1,304 Santander Bank Polska 1,169 1,159 Santander Portugal 1,040 1,040 Santander US Auto 1,035 1,003 Santander España 998 998 Santander Holding USA (ex. Auto) 839 814 Santander UK 627 612 Grupo Financiero Santander (Mexico) 500 523 Banco Santander - Chile 492 516 Ebury Partners 333 350 Santander Consumer Nordics 216 206 Other entities 350 369 Total Goodwill 13,668 14,017 During the first six months of 2024 there has been a decrease in goodwill of EUR 349 million mainly due to exchange differences (see Note 11), which in accordance with current regulations, have been recorded with a credit to the heading Other comprehensive income - Items that can be reclassified in results- Foreign currency translation of equity through the Statement of recognized income and expenses. Note 17 of the consolidated annual accounts for the year ended 31 December 2023 includes detailed information on the procedures followed by Grupo Santander to analyse the potential impairment of the goodwill recognised with the respect to its recoverable amount and to recognise the related impairment losses, where appropriate. In accordance with IAS 36, a Cash Generating Unit (CGU) to which goodwill has been assigned should be subjected to an annual impairment test, and when there are signs of impairment. In accordance with all mentioned before and the analysis made of the information available on the evolution of the different cash-generating units that could reveal the existence of indications of impairment, the directors of the Grupo Santander have concluded that during the first six months of 2024 , there were no triggers that required the recording of impairments.

Financial liabilities

Financial liabilities	6 Months Ended
	Jun. 30, 2024
Disclosure of financial liabilities [abstract]
Financial liabilities	Financial liabilities a) Breakdown The following is a breakdown of Grupo Santander's financial liabilities, other than the balances corresponding to the Derivatives - hedge accounting heading, as of 30 June 2024 and 31 December 2023, presented by nature and categories for valuation purposes: EUR million 30-06-2024 31-12-2023 Financial Financial Financial Financial Financial Financial Derivatives 52,261 50,589 Short Positions 29,653 26,174 Deposits 51,942 27,751 1,106,860 45,507 34,996 1,125,308 Central banks 11,057 1,605 34,097 7,808 1,209 48,782 Credit institutions 17,156 1,337 83,655 17,862 1,735 81,246 Customer 23,729 24,809 989,108 19,837 32,052 995,280 Debt instruments — 6,726 305,136 — 5,371 303,208 Other financial liabilities — 16 42,900 — — 40,187 Total 133,856 34,493 1,454,896 122,270 40,367 1,468,703 b) Information on issuances, repurchases or redemptions of debt instruments issued The detail of the balance of debt instruments issued according to their nature is: EUR million 30-06-2024 31-12-2023 Bonds and debentures outstanding 239,696 231,880 Subordinated 32,111 30,529 Promissory notes and other securities 40,055 46,170 Total debt instruments issued 311,862 308,579 The detail, at 30 June 2024 and 2023, of the outstanding balance of the debt instruments, excluding promissory notes, which at these dates had been issued by Banco Santander 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 2024 and 2023: EUR million 30-06-2024 Opening Perimeter Issuances or placements Repurchases or Exchange Closing Bonds and debentures outstanding 231,880 (1,224) 41,185 (32,172) 27 239,696 Subordinated 30,529 — 3,908 (2,422) 96 32,111 Bonds and debentures outstanding and subordinated liabilities issued 262,409 (1,224) 45,093 (34,594) 123 271,807 EUR million 30-06-2023 Opening Perimeter Issuances or placements Repurchases or Exchange Closing Bonds and debentures outstanding 211,597 (1,467) 34,438 (28,534) 1,701 217,735 Subordinated 25,717 — 1,500 (36) (317) 26,864 Bonds and debentures outstanding and subordinated liabilities issued 237,314 (1,467) 35,938 (28,570) 1,384 244,599 On 20 May 2024, Banco Santander, S.A., proceeded to partially redeem in advance the contingently convertible preferred shares with ISIN code XS1793250041, for a total nominal amount of 1,312.4 million euros and which are traded on the market of the Irish Stock Exchange “Global Exchange Market” (the 'PPCC'), leaving the amount in circulation at 187.6 million euros. On 20 May 2024, Banco Santander, S.A. carried out a placement of preference shares contingently convertible into newly issued ordinary shares of the Bank (PPCC), for a nominal amount of 1,500 million euros. The Issuance has been made at par and the remuneration of the PPCC, whose payment is subject to certain conditions and is also discretionary, has been set at 7% annually for the first six years, being reviewed every five years thereafter by applying a margin of 443.2 basis points over the five-year mid-swap rate. On 14 March 2024, Banco Santander, S.A. issued subordinated obligations for an amount of 1,250 million dollars (valued at 1,158 million euros) for a term of 10 years. The issuance was made at par and the issue coupon was set at 6.35% per year, payable bi-annually. On 8 February 2024, Banco Santander, S.A., proceeded to prepay all of the contingently convertible Tier 1 preferred shares with ISIN code XS1951093894, for a total nominal amount of 1,200 million dollars (valued at 1,110 million euros). and that were traded on the Irish Stock Exchange “Global Exchange Market” (the 'PPCC'). On 22 January 2024, Banco Santander, S.A. issued subordinated bonds for an amount of 1,250 million euros for a term of 10 years and 3 months. The issue was carried out at 99.739% and the issue coupon was set at 5.00% per year for the first 5 years and 3 months, with an amortization option in April 2029, reviewing the coupon, in case of non-amortization, at a fixed rate equivalent to a margin of 250 points plus the 5-year Euro swap rate. On 23 May 2023, Banco Santander, S.A. carried out an issue of subordinated bonds for an amount of EUR 1,500 million at a term of 10 years and 3 months. The issue coupon was fixed at 5.75% per year for the first 5 years and 3 months, with an option to redeem in August 2028, revising the coupon, in the event of non-amortization, even a margin of 285 points more the 5-year Euro Swap rate. c) Other issuances guaranteed by Grupo Santander At 30 June 2024 and 2023, there were no debt instruments issued by associates or non-Group third parties (unrelated) that had been guaranteed by Banco Santander 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 Grupo Santander’s financial liabilities are recorded that are measured using criteria other than fair value and their corresponding fair value at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Carrying amount Fair value Carrying amount Fair value Deposits 1,106,860 1,105,646 1,125,308 1,124,373 Debt instruments 305,136 301,813 303,208 298,792 Liabilities 1,411,996 1,407,459 1,428,516 1,423,165 Additionally, other financial liabilities are accounted for EUR 42,900 million and EUR 40,187 million as of 30 June 2024 and 31 December 2023, respectively.

Provisions

Provisions	6 Months Ended
	Jun. 30, 2024
Provisions [abstract]
Provisions	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 31 December 2023 to 30 June 2024, is mainly due to benefit and premium payments or contributions (see Note 11.d). 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 30 June 2024 and at 31 December 2023 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: EUR million 30-06-2024 31-12-2023 Provisions for taxes 714 745 Provisions for employment-related proceedings (Brazil) 612 611 Provisions for other legal proceedings 1,305 1,359 Provision for customer remediation 535 454 Provision for restructuring 663 596 Other 1,044 869 4,873 4,634 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 Grupo Santander companies. The provisions for customer remediation include mainly the estimated cost of payments to remedy errors relating to the sale of certain products in the UK, as well as the estimated amount related to the floor clauses of Banco Popular Español, S.A.U. To calculate the provision for customer remediation, the best estimate of the provision made by management is used, which is based on the estimated number of claims to be received and, of these, the number that will be accepted, as well as the estimated average payment per case. The provisions for restructuring include only the costs arising from restructuring processes carried out by the various Group companies. Lastly, the Other heading contains very atomized and individually insignificant provisions, such as the provisions to cover the operational risk of the different offices of the Group. Qualitative information on the main litigation is provided in Note 10.c. The Group's general policy is to record provisions for tax and legal proceedings in which the Group assesses the chances of loss to be probable and the Group does not record provisions when the chances of loss are possible or remote. Grupo Santander determines the amounts to be provided for as its 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. With respect to changes in provisions in the first six months of 2024, for employment and other legal proceedings, in Brazil, provisions of EUR 267 million and EUR 140 million were recorded, making payments of EUR 202 million and EUR 100 million, respectively. c) Litigation and other matters i. Tax-related litigation At 30 June 2024 the main tax-related proceedings concerning the Group were as follows: • 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 Programa de Integraçao Social (PIS) and Contribuição para Financiamento da Seguridade Social (COFINS), 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 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 Federal Supreme Court also admitted the appeals related to the other Group entities both for PIS and COFINS. On June 13, 2023, the Federal Supreme Court ruled unfavorably two cases through General Repercussion (Theme 372), including Banco Santander (Brasil) S.A. case. The Bank has filed a new appeal, considering the possible loss as a contingent liability. The cases of the other Group entities are no longer susceptible of appeal and a provision has been recognized 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 (Imposto sobre a Renda das Pessoas Jurídicas - IRPJ - and Contribuçao Social sobre o Lucro Liquido -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, which involves several cases, are pending decision in different administrative and 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 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. A provision was recognised in connection with the amount of the estimated loss. • 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, actually Santander Brasil Tecnología S.A.) and Banco Santander (Brasil) S.A. in relation to the Provisional Tax on Financial Movements (Contribuição Provisória sobre Movimentação Financeira) of the years 2000 to 2002. The administrative discussion ended unfavourably for both companies, and on July 3, 2015, filed a lawsuit requesting the cancellation of both tax assessments. The lawsuit was judged unfavourably in first instance. Therefore, both plaintiffs appealed to the court of second instance. On December 2020, the appeal was decided unfavourably. Against the judgment, the bank filed a motion for clarification which has not been accepted. Currently it is appealed to higher courts. There is a provision recognized for the estimated loss. • In December 2010 the Brazilian tax authorities issued an infringement notice against Santander Seguros S.A. (Brasil), (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. The administrative discussion ended unfavourably, and the CARF decision has been appealed at the Federal Justice. As the former parent of Santander Seguros S.A. (Brasil) (currently Zurich Santander Brasil Seguros e Previdência S.A.), 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. The Bank appealed before the Higher Chamber of CARF, and a final favourable decision was obtained in April 2024. 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. In May 2024, the appeal related to period 2009 to 2012 was rejected by the CARF and the resolution was appealed at the Federal Justice. 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 the amount 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 of year 2009 and 2019. The appeals are pending decision at the administrative level. No provision was recognised in connection with this matter as it is considered to be a contingent liability. • Banco Santander (Brasil) S.A. filed a suspensive judicial measure aiming to avoid the withholding income tax (Imposto sobre a Renda Retido na Fonte - IRRF), on payments derived from technology services provided by Group foreign entities. A favorable decision was handed down and an appeal was filed by the tax authority at the Federal Regional Court, where it awaits judgment. No provision was recognized as it is considered to be a contingent liability. • Brazilian tax authorities have issued infringement notices against Getnet Adquirência e Serviços para Meios de Pagamento S.A and Banco Santander (Brasil) S.A. as jointly liable in relation to corporate income tax (IRPJ and CSLL) for 2014 to 2018 questioning the tax-deductibility of the amortization of the goodwill from the acquisition of Getnet Tecnologia Proces S.A., considering that the company would not have complied with the legal requirements for such amortization. The tax assessment notices were appealed to the CARF. In March 2024, the CARF issued a favourable partial decision on the infraction notice of 2014/2015. No provision was recognized as it is considered to be a contingent liability. The total amount for the aforementioned Brazil lawsuits that are fully provisioned is EUR 759 million, and for lawsuits that qualify as contingent liabilities is EUR 4,815 million. • Banco Santander appealed before European Courts the Decisions 2011/5/CE of 28 October 2009 (First Decision), andc2011/282/UE of 12 January 2011 (Second Decision) of the European Commission, ruling that the deduction of the financial goodwill regulated pursuant to Article 12.5 of the Corporate Income Tax Law constituted illegal State aid. On October 2021 the Court of Justice definitively confirmed these Decisions. The dismissal of the appeal, that only affects these two decisions, had no impact on results. At the date of approval of these interim financial statements, there are other less significant tax disputes. ii. Non-tax-related proceeding s At 30 June 2024the main non-tax-related proceedings concerning the Group were as follows: • Payment Protection Insurance (PPI): AXA France IARD and AXA France Vie (former GE Capital Corporation Group entities (GE Capital), known as Financial Insurance Company Ltd (FICL) and Financial Assurance Company Ltd (FACL), acquired by AXA SA in 2015) (together, AXA France) have brought a claim for GBP 552 million (EUR 651.3 million)(plus interest) against (i) Santander Cards UK Limited (former GE Capital entity known as GE Capital Bank Limited (GECB), which was acquired by Banco Santander, S.A. in 2008 and subsequently transferred to Santander UK plc); and (ii) Santander Insurance Services UK Limited (a Banco Santander, S.A. subsidiary) (together the Santander Entities). The claim relates to the allocation of liability for compensation and associated costs in respect of a large number of PPI policies distributed by GECB pre-2005, which were underwritten by FICL and FACL. AXA France reduced their claim from GBP 670 million (plus interest) to GBP 552 million (EUR 651.3 million) (plus interest) in their Re-Re-Amended Particulars of Claim dated 29 June 2023. The Santander Entities strongly refute the claim. Trial has been fixed on 3 March 2025. There are ongoing factual issues to be resolved which may have legal consequences including in relation to liability. These issues create uncertainties which mean that it is difficult to reliably predict the outcome or the timing of the definitive resolution of the matter. The provision recognized includes the best estimate of the Santander Entities’ liability to the specific portfolio. • Motor Finance Broker Commissions: following the Financial Conduct Authority's (FCA) Motor Market review in 2019 which resulted in a change in rules in January 2021, Santander Consumer (UK) plc (SCUK) has received a number of county court claims and complaints in respect of its historical use of discretionary commission arrangements (DCAs) prior to the 2021 rule changes. In the context of the complaints made to the Financial Ombudsman Service (FOS) relating to such commission arrangements, the FCA announced on 11 January 2024 that it intends to use its powers under s166 of the Financial Services and Markets Act 2000 to review the historical use of DCAs between lenders and credit brokers (the “FCA Review”) and whether redress should be payable within all the industry. In line with the FCA's announcement, we have paused the response to customer complaints until at least 20 November 2024. A claim has been issued against SCUK, Santander UK plc and others in the Competition Appeal Tribunal (CAT), alleging that SCUK’s historical commission arrangements in respect of used car financing operated in breach of the Competition Act 1998. The CAT proceedings have been stayed until 25 November 2024 given the ongoing FCA Review. While it is possible that certain charges may be incurred in relation to the FCA's review or related existing or future county court claims, FOS complaints and the CAT proceedings, it is not considered that a legal or constructive obligation has been incurred in relation to these matters that would require a provision to be recognised at this stage. The resolution of such matters is not possible to predict with any certainty and there remain significant inherent uncertainties regarding the existence, scope and timing of any possible outflow which make it impracticable to disclose the extent of any potential financial impact. • Delforca: dispute arising from equity swaps entered into by Gaesco (now Delforca 2008, S.A. (Delforca)) on shares of Inmobiliaria Colonial, S.A. Banco Santander, S.A. is claiming to Delforca before the Court of Barcelona in charge of the bankruptcy proceedings, a total of EUR 66 million from the liquidation resulting from the early termination of financial transactions due to Delforca's non-payment of the equity swaps. In the same bankruptcy proceedings, Delforca and Mobiliaria Monesa, S.A., parent of Delforca (Monesa) have in turn claimed the Bank to repay EUR 57 million, which the Bank received for the enforcement of the agreed guarantee, as a result of the aforementioned liquidation. On 16 September 2021 the Commercial Court Number 10 of Barcelona has ordered Delforca to pay the Bank EUR 66 million plus EUR 11 million in interest and has dismissed the claims filed by Delforca. This decision has been appealed by Delforca, Monesa and the bankruptcy administrator. On 1 June 2023, the appeal hearing took place and on 15 November 2023 the Provincial Court of Barcelona rendered a judgment dismissing the appeals filed by Delforca, Monesa and the bankruptcy administrator and confirming the first instance judgment. Delforca and Monesa (not the bankruptcy administrator) have filed an appeal in cassation before the Supreme Court against the judgment of the Provincial Court of Barcelona. Separately, Monesa, filed in 2009 a civil procedure with the Courts of Santander against the Bank claiming damages that have not been specified to date. The procedure is suspended. • Former employees of Banco do Estado de São Paulo S.A., Santander Banespa, Cia. de Arrendamiento Mercantil: class action filed by AFABESP (an association of retirees and former Banespa employees) claiming payment of a semi-annual bonus provided for in the Bank's bylaws. The final decision rendered on the merits was unfavorable to Santander. However, a favorable decision was subsequently rendered stating that each beneficiary of the decision shall file an individual lawsuit to receive the due amount. Since the judgments adopted different positions for each case, a procedure called Incident for the Resolution of Repetitive Demands (IRDR) was commenced before the Regional Labor Court (TRT) with the purpose of establishing objective criteria regarding the arguments brought by the Bank, mainly the statute of limitations and limitation of payments until December 2006 (Plan V). On 11 March 2024, the IRDR was admitted for future judgment, and it was determined that all cases filed in São Paulo - Capital remained suspended from its second instance (TRT). Finally, due to the divergence between the interpretation of the Federal Constitution, an Action for Allegation of Non- Compliance with a Fundamental Precept (ADPF) was also filed, so that the Federal Supreme Court (STF) settles the issue and indicates the correct statute of limitations to be used in the individual cases filed. On 27 June 2024, an agreement was signed with the indication of a nominal and exhaustive list of 7,299 retirees who, according to the criteria presented by the Bank, are entitled to payment of the amounts related to semi-annual bonuses. The total value of the agreement will be BRL 2.7 billion (EUR 454.3 million); though it will ultimately depend on the individual and voluntary adherence of each beneficiary until 31 July 2024, period that may be extended until 15 August 2024. After the end of the voluntary adherence period, payments will be made in five instalments for living retirees (first installment on 20 October 2024) and a single installment for the heirs of the deceased people (31 October 2024). Considering that it is not possible to estimate the number beneficiaries and the total volume of the obligations that will be involved in the agreement; and that recognition of the obligation is conditional upon the adherence of the beneficiaries within the fixed period, as of 30 June 2024, the recorded provision is based on the estimation of the risk associated to individual claims against the Bank, being subject to the mentioned circumstances the future evolution of the provision and the final cost of the agreement. • Planos Económicos': like the rest of the banking system in Brazil, Santander Brazil has been the target of customer complaints and collective civil suits stemming mainly from legislative changes and its application to bank deposits (economic plans). At the end of 2017, an agreement between regulatory entities and the Brazilian Federation of Banks (Febraban) with the purpose of closing the lawsuits was reached and was approved by the Supremo Tribunal Federal. 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 adhesions there may be and the number of savers who have proved 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 proceedings for two years from May 2018. On 29 May 2020, the STF approved the extension of the agreement for 5 additional years starting from 3 June 2020. Condition for this extension was to include in the agreement actions related to the 'Collor I Plan'. On 30 June 2024, the provision recorded for the economic plan proceedings amounts to EUR 175.8 million. • Floor clauses: as a consequence of the acquisition of Banco Popular Español, S.A.U. (Banco Popular), the Group has been exposed to a material number of transactions with floor clauses. The so-called floor 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 included floor clauses in certain asset-side transactions with customers. In relation to this type of clauses, and after several rulings issued by the Court of Justice of the European Union (CJEU) and the Spanish Supreme Court, and the extrajudicial process established by the Spanish Royal Decree-Law 1/2017, of 20 January, Banco Popular made 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. On 30 June 2024, after having processed most of the customer requests, the potential residual loss associated with ongoing court proceedings is estimated at EUR 53.67 million, amount which is fully covered by provisions. • Banco Popular´s acquisition: after the declaration of the resolution of Banco Popular, some investors filed claims against the EU’s Single Resolution Board decision, and the FROB's resolution executed in accordance with the aforementioned decision. Likewise, numerous appeals were filed against Banco Santander, S.A. alleging that the information provided by Banco Popular was erroneous and requesting from Banco Santander, S.A. the restitution of the price paid for the acquisition of the investment instruments or, where appropriate, the corresponding compensation. In relation to these appeals, on the one hand, the General Court of the European Union (GCUE) selected 5 appeals from among all those filed before the European courts by various investors against the European institutions and processed them as pilot cases. On 1 June 2022, the GCUE rendered five judgements in which it completely dismissed the appeals, (i) supporting the legality of the resolution framework applied to Banco Popular, (ii) confirming the legality of the action of the European institutions in the resolution of Banco Popular and (iii) rejecting, in particular, all the allegations that there were irregularities in the sale process of Banco Popular to Banco Santander, S.A. Although four of these five judgments were initially appealed in cassation before the CJEU, in July 2023 one of the appellants withdrew his appeal. Therefore, only the appeals against three judgments are pending before the CJEU and in June 2024, the CJEU upheld the appeal in case C-551/22-P brought by the Commission. Appeals which are still pending in cassation refer to cases C-448/22-P, C-535/22-P and C-541/22-P. On the other hand, in relation to the lawsuits initiated by investors directly against Banco Santander, S.A. derived from the acquisition of Banco Popular, on 2 September 2020, the Provincial Court of La Coruña submitted a preliminary ruling to the CJEU in which it asked for the correct interpretation of the Article 60, section 2 of Directive 2014/59/EU of the European Parliament and of the Council of 15 May, establishing a framework for the restructuring and resolution of credit institutions and investment services companies. Said article establishes that, in the cases of redemption of capital instruments in a bank resolution, no liability will subsist in relation to the amount of the instrument that has been redeemed. On 5 May 2022, the CJEU rendered its judgement confirming that Directive 2014/59/EU of the European Parliament and of the Council does not allow that, after the total redemption of the shares of the share capital of a credit institution or an investment services company subject to a resolution procedure, the shareholders who have acquired shares within the framework of a public subscription offer issued by said company before the start of such a resolution procedure, exercise against that entity or against its successor, an action for liability for the information contained in the prospectus, under Directive 2003/71/EC of the European Parliament and of the Council, or an action for annulment of the subscription contract for those shares, which, taking into account its retroactive effects, gives rise to the restitution of the equivalent value of said shares, plus the interest accrued from the date of execution of said contract. Regarding this judgment, several courts have referred additional preliminary rulings before the CJEU: (i) in December 2022 the Supreme Court requested three preliminary rulings in respect of its applicability to the holders of subordinated obligations, preferred stocks and subordinated bonds of Banco Popular; (ii) in April 2023, the First Instance Court 3 of Santa Coloma de Farners requested three preliminary rulings to the CJEU asking about pre-emptive subscription rights and the compatibility of the principles of proportionality and legal certainty with the bringing of legal actions by former holders of pre-emptive subscription rights and shares against the entity issuing the securities or against the entity succeeding it, which have been stayed by the CJEU until the preliminary rulings raised by the Supreme Court are resolved; and (iii) in November 2023, the Supreme Court requested another two preliminary rulings which supplement the ones requested in December 2022, regarding to a holder of subordinated bonds who filed a claim against Banco Popular before the resolution. On 4 March 2024, in the context of preliminary proceedings 42/2017, the Central Court of Instruction No. 4 issued a ruling transforming the proceedings into Summary Proceedings and terminating the investigation phase. The ruling considers that the circumstantial evidence resulting from the investigation which could constitute a crime is basically the following: (i) an alleged misrepresentation in the prospectus of the 2016 capital increase of Banco Popular; (ii) an alleged misrepresentation in the annual accounts of Banco Popular for 2015, the interim financial statements for 2016 and the annual accounts for 2016; and (iii) the offer to the market of a distorted amount of regulatory capital, after the capital increase of 2016 (for allegedly having been granted by Banco Popular financing to clients for the subscription of shares in the aforementioned capital increase, without discounting it from the regulatory capital). According to the aforementioned ruling, these facts could constitute the crimes of fraud of investors (art. 282 of the Criminal Code) and accounting falsehood (art. 290 of the Criminal Code). All appeals filed against the ruling have been dismissed. On 11 July 2024 the parties were summoned to file their indictment briefs within a 40-day term. During the course of the proceedings, on 30 April 2019, the Spanish National Court, ruled in favour of Banco Santander, S.A. declaring that Banco Santander, S.A. cannot inherit Banco Popular’s potential criminal liability. This ruling was appealed before the Supreme Court, which rejected it. In these proceedings, Banco Santander, S.A. could potentially be subsidiarily liable for the civil consequences. In view of the CJEU ruling of 5 May 2022, the Bank requested confirmation of the exclusion of its subsidiary civil liability status in this criminal proceeding. On 26 July 2022, the Court rejected this request stating that it is a matter to be determined at a later procedural time. This decision was confirmed on appeal by the Chamber of the National Court by judgment of 5 October 2022. The estimated cost of any compensation to shareholders and bondholders of Banco Popular recognized in the 2017 accounts amounted to EUR 680 million, of which EUR 535 million were applied to the commercial loyalty program. The CJEU judgement of 5 May 2022 represented a very significant reduction in the risk associated with these claims. • 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, Santander Financial 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. According to the state of the investigations, the result and the effects for the Group, which may potentially include the imposition of material financial consequences (penalties and/or disgorgement of proceeds), cannot be anticipated. For this reason, the Bank has not recognized any provisions in relation to the potential imposition of financial penalties. • Banco Santander, S.A. was sued in a legal proceeding in which the plaintiff alleges that the Bank breached his contract as CEO of the institution: in the lawsuit, the claimant mainly requested a declaratory ruling upholding the existence, validity and effectiveness of such contract and its enforcement together with the payment of certain amounts. For the case that the main request is not granted, the claimant sought a compensation for a total amount of approximately EUR 112 million or, an alternative relief for other minor amounts. Banco Santander, S.A. answered to the legal action stating that the conditions to which the appointment of that position was subject to were not met; that the executive services contract required by law was not concluded; and that in any case, the parties could terminate the contract without any justified cause. On 17 May 2021, the plaintiff reduced his claims for compensation to EUR 61.9 million. On 9 December 2021, the Court upheld the claim and ordered the Bank to compensate the claimant in the amount of EUR 67.8 million. By court order of 13 January 2022, the Court corrected and supplemented its judgment, reducing the total amount to be paid by the Bank to EUR 51.4 million and clarifying that part of this amount (buy out) was to be paid under the terms of the offer letter, i.e., entirely in Banco Santander shares, within the deferral period for this type of remuneration at the plaintiff's former employer and subject to the performance metrics or parameters of the plan in force at the Bank, which was that of 2018. As explained in note 5 of the report of the consolidated annual accounts of the year 2022, the degree of performance of these objectives was 33.3%. The Bank filed an appeal against the judgment before the Madrid Court of Appeal, which was opposed by the plaintiff. At the same time, the plaintiff filed an application for provisional enforcement of the judgment in the First Instance Court. A court order was issued ordering enforcement of the judgment, and the Bank deposited in t

Equity

Equity	6 Months Ended
	Jun. 30, 2024
Equity [abstract]
Equity	Equity In the six-month periods ended 30 June 2024 and 2023 there were no quantitative or qualitative changes in Grupo Santander's equity other than those indicated in the condensed consolidated statements of changes in total equity. a) Capital Banco Santander's share capital at 30 June 2024 and 31 December 2023 consisted of EUR 7,747 million and EUR 8,092 million, respectively, represented by 15,494,273,572 and 16,184,146,059 shares of EUR 0.50 of nominal value each, respe ctively, and all of them of a unique class and series. On 26 June 2024, there was a capital reduction amounting to EUR 165,652,500 through the redemption of 331,305,000 shares, corresponding to the share buyback program carried out between February and June 2024. Likewise, on 30 January 2024, there was a capital reduction amounting to EUR 179,283,744 through the redemption of 358,567,487 shares, corresponding to the share buyback program for the year 2023 ended in January 2024. The operations have not entailed the return of contributions to the shareholders as the Bank is the holder of the redeemed shares. b) Share premium Includes the amount paid by the bank's shareholders in capital issuances in excess of par value. As a result of the capital reductions described in Note 11.a, during the first semester of 2024, the share premium has been reduced by EUR 2,424 million corresponding to the difference between the purchase value of the shares amortised (EUR 2,769 million) and the nominal value of said shares (EUR 345 million) (see Total Statement of Changes in Shareholders' Equity). Likewise, and in accordance with applicable legislation, a reserve for amortized capital has been allocated with a charge to the share premium for an equal amount to the nominal value of said amortised shares (EUR 345 million). c) Breakdown of other comprehensive income - Items not reclassified to profit or loss and Items that may be reclassified to profit or loss EUR million 30-06-2024 31-12-2023 Other comprehensive income accumulated (36,963) (35,020) Items not reclassified to profit or loss (5,118) (5,212) Actuarial gains or losses on defined benefit pension plans (4,234) (4,324) Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (3) 1 Other valuation adjustments — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (705) (776) Inefficacy of fair value hedges of equity instruments measured at fair value with changes — — Changes in the fair value of equity instruments measured at fair value with changes 268 264 Changes in the fair value of equity instruments measured at fair value with changes (268) (264) Changes in the fair value of financial liabilities measured at fair value through profit or loss (176) (113) Items that may be reclassified to profit or loss (31,845) (29,808) Hedge of net investments in foreign operations (effective portion) (8,583) (8,684) Exchange differences (21,187) (19,510) Hedging derivatives (effective portion) (966) (740) Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income (733) (555) Hedging instruments (items not designated) — — Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (376) (319) d) Other comprehensive income - Items not reclassified to profit or loss - Actuarial gains or losses on defined benefit pension plans The balance of the heading Other accumulated comprehensive income - Items not reclassified to profit or loss - Actuarial gains or losses on defined benefit pension plans, includes the actuarial gains or losses and the return on the assets assigned to the plan, less administration costs and plan's own taxes, and any change in the effects of the asset limit, excluding amounts included in net interest on net defined benefit liability (asset). Its variation is shown in the consolidated condensed statement of recognized income and expense. During the first six months of 2024, the amount of actuarial losses (net of actuarial gains) has increased by EUR 59 million. The main impacts are: • Increase of EUR 187 million in the cumulative actuarial losses relating to the Group´s businesses in the UK, mainly due to the behaviour of the asset portfolio and the variation in inflation hypotheses (both short and long term). These effects have been partially offset by the variation in the discount rate (increase from 4.63% to 5.15%). • Decrease of 63 million in the cumulative actuarial losses relating to the Group's businesses in Brasil, mainly due to the discount rate variation (increase from 8.65% to 9.57% in the main pension plans, from 8.70% to 9.56% in the main medical plan). These effects have been partially offset by the effect of short-term inflation and the behaviour of the asset portfolio. • Decrease of EUR 43 million in the cumulative actuarial losses relating to the Group's businesses in Mexico, mainly due to the increase in the discount rate (from 9.25% to 10.25%). • Decrease of EUR 10 million in the cumulative actuarial losses relating to the Group's businesses in Germany, mainly due to the discount rate variation (increase from 3.57% to 3.74%). The other modification in accumulated actuarial profit or losses is a decrease of EUR 12 million as a result of the evolution of exchange rates and other movements. e) 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 30 June 2024 and 31 December 2023 under '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' depending on the geographical origin of the issuer: EUR million 30-06-2024 31-12-2023 Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Equity instruments Domestic Spain 33 (1,325) (1,292) 106 32 (1,173) (1,141) 252 International Rest of Europe 123 (71) 52 284 117 (71) 46 267 United States 17 — 17 19 16 — 16 19 Latin America and rest 519 (1) 518 1,433 370 (67) 303 1,223 692 (1,397) (705) 1,842 535 (1,311) (776) 1,761 Of which: Listed 472 (49) 423 1,462 316 (118) 198 1,225 Unlisted 220 (1,348) (1,128) 380 219 (1,193) (974) 536 f) 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 six months of 2024 in the interim condensed consolidated statement of recognised income and expenses, reflects the impact of the evolution of the currencies during the year, reflecting mainly the appreciation of the Pound Sterling, US dollar and Mexican peso as well as the depreciation of the Brazilian real and Chilean peso (see Note 1.e). Of this variation, a capital loss of EUR 335 million corresponds to the valuation at the closing exchange rate of goodwill for the first six months of 2024 (see Note 8). g) Other comprehensive income – Items that may be reclassified to profit or loss – Changes in the fair value of debt instrument s measured at fair value through other comprehensive income 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 30 June 2024 and 31 December 2023 under Other comprehensive income - Items that may 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: EUR million 30-06-2024 31-12-2023 Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Debt instruments Issued by public Public-sector Spain 102 (1) 101 10,136 17 0 17 9,867 Rest of Europe 257 (82) 175 14,850 333 (96) 237 18,258 Latin America and rest of the world 69 (873) (804) 37,838 194 (820) (626) 38,169 Issued by Private-sector Spain 73 (13) 60 6,366 98 (9) 89 5,129 Rest of Europe 21 (30) (9) 5,776 19 (30) (11) 5,018 Latin America and rest of the world 12 (268) (256) 5,462 6 (267) (261) 5,106 534 (1,267) (733) 80,428 667 (1,222) (555) 81,547

Segment information (Primary se

Segment information (Primary segment)	6 Months Ended
	Jun. 30, 2024
Disclosure of operating segments [abstract]
Segment information (Primary segment)	Segment information (Primary segment) Grupo Santander has aligned the information in this note with the underlying information used internally for management reporting and with that presented in Grupo Santander's other public documents. Grupo Santander's executive committee has been selected to be its chief operating decision maker. Grupo Santander's operating segments reflect its organizational and managerial structures. The executive committee reviews internal reporting based on these segments to assess performance and allocate resources. On September 18, 2023, Grupo Santander announced that it is consolidating its retail & commercial and consumer activities across all markets under two new global businesses: Retail & Commercial and Digital Consumer Bank. The changes align these businesses with Santander’s at 30 June 2024, global model in Corporate & Investment Banking, Wealth Management & Insurance and Payments, helping the bank achieve the strategic goals. The segments are split by business units in which profits are made and by geographic area. The information is prepared by aggregating the figures for Grupo Santander’s various geographic areas and business units, relating it to both the accounting data of the units integrated in each segment and that provided by management information systems. The same general principles as those used in Grupo Santander are applied. The Group's main level of segmentation, derived from its management model, consolidates the retail, commercial and consumer banking businesses of all markets under the umbrella of two new global business areas: • Retail & Commercial Banking (Retail): new area that integrates the retail banking business (individuals) and commercial banking (SMEs and corporates), except for business originated in the consumer finance and the cards businesses. • Digital Consumer Bank (Consumer): comprises all business originated in the consumer finance companies, plus Openbank, Open Digital Services (ODS) and SBNA Consumer. • Corporate & Investment Banking (CIB): this business, which includes Global Transactional Banking, Global Banking (Global Debt Finance and Corporate Finance) and Markets, offers products and services on a global scale to corporate and institutional customers, and collaborates with other global businesses to better serve our broad customer base. • Wealth Management & Insurance (Wealth): includes the asset management business (Santander Asset Management), the corporate unit of Private Banking and International Private Banking in Miami and Switzerland and the insurance business (Santander Insurance). • Payments: digital payments solutions, providing global technology solutions for our banks and new customers in the open market. It is structured in two businesses: PagoNxt (Getnet, Ebury and PagoNxt Payments) and Cards (cards platform and business in the countries). In accordance with the information used by the Group's executive committee for decision making, following is a distribution of the gross margin by business segment accompanying consolidated income statements for the six-month periods ended 30 June 2024 and 2023. In addition to these operating units, which report by geographic area and businesses, Grupo Santander continues to maintain the area of Corporate Center, that includes the centralized activities relating to equity stakes in financial companies, financial management of the structural exchange rate position, assumed within the sphere of Grupo Santander's assets and liabilities committee, as well as management of liquidity and of shareholders' equity via issuances. 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. Following is the reconciliation between the adjusted profit and the statutory profit corresponding to the six-month periods ended 30 June 2024 and 2023: EUR million Gross Margin Profit before taxes Profit Segment 30-06-2024 30-06-2023 30-06-2024 30-06-2023 30-06-2024 30-06-2023 Retail & Commercial Banking 16,274 14,392 5,187 3,638 3,326 2,421 Digital Consumer Bank 6,449 6,026 1,341 1,504 1,070 1,027 Corporate & Investment Banking 4,188 3,956 2,151 2,305 1,405 1,478 Wealth Management & Insurance 1,789 1,589 1,130 985 818 711 Payments 2,701 2,613 306 498 49 223 Corporate Center (350) (342) (606) (601) (609) (620) Underlying Profit 31,050 28,234 9,508 8,329 6,059 5,241 Adjustments (335) (224) — (239) — — Statutory Profit 30,715 28,010 9,508 8,090 6,059 5,241

Related parties

Related parties	6 Months Ended
	Jun. 30, 2024
Disclosure of transactions between related parties [abstract]
Related parties	Related parties The parties related to Grupo Santander are deemed to include, in addition to its subsidiaries, associates and joint ventures, Banco Santander’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 Grupo Santander with its related parties in the first six months of 2024 and 2023, distinguishing between significant shareholders, members of Banco Santander’s board of directors, Banco Santander’s executive vice presidents, Grupo Santander 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: EUR million 30-06-2024 Expenses and income Significant shareholders Directors and executives Group companies or entities Other related parties Total Expenses Finance costs — — 75 2 77 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 97 — 97 — — 172 2 174 Income Finance income — — 249 4 253 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 798 1 799 — — 1,047 5 1,052 EUR million 30-06-2024 Other transactions Significant shareholders Directors and executives Group companies or entities Other related parties Total Financing agreements: loans and capital contributions (lender) — — 363 50 413 Financing agreements: loans and capital contributions (borrower) — (2) 545 84 627 Guarantees provided — — 8 (291) (283) Guarantees received — — — — — Commitments acquired — — 44 2 46 Dividends and other distributed profit — 2 — 17 19 Other transactions — — (127) — (127) EUR million 30-06-2024 Balance closing period Significant shareholders Directors and executives Group companies or entities Other related parties Total Debt balances: Customers and commercial debtors — — — — — Loans and credits granted — 10 10,043 234 10,287 Other collection rights — — 704 — 704 — 10 10,747 234 10,991 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 16 2,735 234 2,985 Other payment obligations — — 304 — 304 — 16 3,039 234 3,289 EUR million 30-06-2023 Expenses and income Significant shareholders Directors and executives Group companies or entities Other related parties Total Expenses Finance costs — — 79 — 79 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 57 — 57 — — 136 — 136 Income Finance income — — 188 3 191 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 709 1 710 — — 897 4 901 EUR million 30-06-2023 Other transactions Significant shareholders Directors and executives Group companies or entities Other related parties Total Financing agreements: loans and capital contributions (lender) — 2 376 (199) 179 Financing agreements: loans and capital contributions (borrower) — — (29) 7 (22) Guarantees provided — — — 680 680 Guarantees received — — — — — Commitments acquired — — 51 3 54 Dividends and other distributed profit — 1 — 10 11 Other transactions — — 36 — 36 EUR million 31-12-2023 Balance closing period Significant shareholders Directors and executives Group companies or entities Other related parties Total Debt balances: — — — — — Loans and credits granted — 12 9,680 185 9,877 Other collection rights — — 817 1 818 — 12 10,497 186 10,695 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 19 2,190 150 2,359 Other payment obligations — — 290 — 290 — 19 2,480 150 2,649

Off-balance-sheet exposures

Off-balance-sheet exposures	6 Months Ended
	Jun. 30, 2024
Off-Balance-Sheet Exposures
Off-balance-sheet exposures	Off - balance-sheet exposures The off-balance-sheet exposures related to balances representing loans 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. EUR million 30-06-2024 31-12-2023 Loan commitments granted 290,151 279,589 Of which impaired 488 406 Financial guarantees granted 15,598 15,435 Of which impaired 497 578 Bank sureties 15,561 15,400 Credit derivatives sold 37 35 Other commitments granted 127,420 113,273 Of which impaired 486 542 Other granted guarantees 57,519 57,363 Other 69,901 55,910 The breakdown of the off-balance sheet exposure and impairment on 30 June 2024 and 31 December 2023 by impairment stages is EUR 413,251 million and EUR 398,243 million of exposure and EUR 274 million and EUR 302 million of impairment in stage 1, EUR 18,447 million and EUR 8,528 million of exposure and EUR 210 million and EUR 174 million of impairment in stage 2, and EUR 1,471 million and EUR 1,526 million of exposure and EUR 214 million and EUR 226 million of impairment in stage 3, respectively.

Average headcount and number of

Average headcount and number of branches	6 Months Ended
	Jun. 30, 2024
Average Headcount And Number Of Branches
Average headcount and number of branches	Average headcount and number of branches The average number of employees at Banco Santander and Grupo Santander, by gender, in the six-month periods ended 30 June 2024 and 2023 is as follows: Average headcount Bank Group 30-06-2024 30-06-2023 30-06-2024 30-06-2023 Men 12,246 12,260 99,865 97,353 Women 11,734 11,732 111,011 112,663 23,980 23,992 210,876 210,016 The number of branches at 30 June 2024 and 31 December 2023 is as follow: Number of branches Group 30-06-2024 31-12-2023 Spain 1,883 1,924 Group 6,402 6,594 8,285 8,518

Other disclosures

Other disclosures	6 Months Ended
	Jun. 30, 2024
Other Disclosures
Other disclosures	Other disclosures a) Valuation techniques for financial assets and liabilities The following table shows a summary of the fair values, at 30 June 2024 and 31 December 2023, of the financial assets and liabilities indicated below, classified on the basis of the various measurement methods used by Grupo Santander to determine their fair value: EUR million 30-06-2024 31-12-2023 Published price quotations in active markets (Level 1) Internal models (Levels 2 and 3) Total Published price quotations in active markets (Level 1) Internal models (Levels 2 and 3) Total Financial assets held for trading 77,854 129,020 206,874 67,842 109,079 176,921 Non-trading financial assets mandatorily at fair value through profit or loss 2,014 4,152 6,166 1,765 4,145 5,910 Financial assets at fair value through profit and loss 2,494 6,675 9,169 2,746 7,027 9,773 Financial assets at fair value through other comprehensive income 63,114 19,156 82,270 64,631 18,677 83,308 Hedging derivatives (assets) — 5,413 5,413 — 5,297 5,297 Financial liabilities held for trading 24,028 109,828 133,856 20,298 101,972 122,270 Financial liabilities designated at fair value through profit or loss — 34,493 34,493 25 40,342 40,367 Hedging derivatives (liabilities) — 5,535 5,535 — 7,656 7,656 Liabilities under insurance contracts — 17,592 17,592 — 17,799 17,799 The financial instruments at fair value determined on the basis of published price quotations in active markets (level 1) include government debt securities, private-sector debt securities, derivatives traded in organised markets, securitised assets, shares, short positions and fixed-income securities issued. In cases where price quotations cannot be observed, management makes its best estimate of the price that the market would set, using its own internal models. In most cases, these internal models use data based on observable market parameters as significant inputs (level 2) and, in cases, they use significant inputs not observable in market data (level 3). In order to make these estimates, various techniques are employed, including the extrapolation of observable market data. The best evidence of the fair value of a financial instrument on initial recognition is the transaction price, unless the fair value of the instrument can be obtained from other market transactions performed with the same or similar instruments or can be measured by using a valuation technique in which the variables used include only observable market data, mainly interest rates. During the first six months of 2024 and 2023, Grupo Santander did not make any material transfers of financial instruments between measurement levels other than the transfers included in level 3 table. Grupo Santander 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 types of derivatives, and the related valuation techniques and inputs, by asset class, are detailed in the consolidated annual accounts as at 31 December 2023. As the end of 30 June 2024, the CVA (Credit Valuation Adjustment) accounted for was EUR 274 million (a decrease of 6.5% compared to 31 December 2023) and adjustments of DVA (Debt Valuation Adjustment) was EUR 265 million (a decrease of 19.7% compared to the end of December 2023). The reduction is mainly due to a decline in the spread curves of the credit markets. Set forth below are the financial instruments at fair value whose measurement was based on internal models (levels 2 and 3) at 30 June 2024 and 31 December 2023: EUR million EUR million Fair values calculated using internal models at 30-06-2024 (*) Fair values calculated using internal models at 31-12-2023 (*) Level 2 Level 3 Level 2 Level 3 Valuation techniques Main inputs ASSETS 153,221 11,195 133,874 10,351 Financial assets held for trading 126,977 2,043 106,993 2,086 Central banks (**) 17,283 — 17,717 — Present value method Yield curves, FX market prices Credit institutions (**) 22,477 — 14,061 — Present value method Yield curves, FX market prices Customers (**) 19,265 307 11,418 24 Present value method Yield curves, FX market prices Debt instruments and equity instruments 10,329 535 8,683 915 Present value method Yield curves, FX market prices Derivatives 57,623 1,201 55,114 1,147 Swaps 45,459 799 44,987 577 Present value method, Gaussian Copula Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 734 8 836 9 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 2,029 30 2,210 153 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures 2,890 — 33 — Present value method Yield curves, FX market prices Index and securities options 252 196 126 235 Black’s Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Liquidity Other 6,259 168 6,922 173 Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX and EQ market prices, Dividends, Liquidity, Dividends, Correlation, HPI, Credit, Others Hedging derivatives 5,413 — 5,297 — Swaps 4,433 — 4,665 — Present value method Yield curves, FX market prices, Basis Interest rate options — — 2 — Black Model Yield curves, FX market prices, Volatility surfaces Other 980 — 630 — Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity, Others Non-trading financial assets mandatorily at fair value through profit or loss 2,057 2,095 2,050 2,095 Equity instruments 708 1,719 815 1,495 Present value method Yield curves, Market price, Dividends and Others Debt instruments 431 244 539 313 Present value method Yield curves Loans and receivables 918 132 696 287 Present value method, swap asset model and CDS Yield curves and Credit curves Financial assets designated at fair value through profit or loss 5,966 709 6,846 181 Credit institutions 444 — 459 — Present value method Yield curves, FX market prices Customers (***) 5,327 224 6,189 31 Present value method Yield curves, FX market prices, HPI Debt instruments 195 485 198 150 Present value method Yield curves, FX market prices Financial assets at fair value through other comprehensive income 12,808 6,348 12,688 5,989 Equity instruments 4 355 5 492 Present value method Yield curves,Market price, Dividends and Others Debt instruments 8,852 677 9,638 559 Present value method Yield curves, FX market prices Loans and receivables 3,952 5,316 3,045 4,938 Present value method Yield curves, FX market prices and Credit curves LIABILITIES 166,015 1,433 166,542 1,227 Financial liabilities held for trading 109,026 802 101,103 869 Central banks (**) 11,056 — 7,808 — Present value method FX market prices, Yield curves Credit institutions (**) 17,156 — 17,862 — Present value method FX market prices, Yield curves Customers 23,729 — 19,837 — Present value method FX market prices, Yield curves Derivatives 51,073 802 49,380 869 Swaps 41,175 304 39,395 388 Present value method, Gaussian Copula Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 589 — 549 8 Black Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 2,388 65 2,207 139 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices Index and securities options 920 222 466 187 Black-Scholes Model Yield curves, FX market prices, Liquidity Interest rate and equity futures 36 — 101 — Present value method Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 5,965 211 6,662 147 Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, HPI, Credit, Others Short positions 6,012 — 6,216 — Present value method Yield curves ,FX market prices, Equity Hedging derivatives 5,530 5 7,650 6 Swaps 5,038 4 6,866 6 Present value method Yield curves ,FX market prices, Basis Interest rate options 1 1 1 — Black's Model Yield curves, Volatility surfaces, FX market prices and Liquidity Other 491 — 783 — Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity and others Financial liabilities designated at fair value through profit or loss 34,141 352 40,313 29 Present value method Yield curves, FX market prices Liabilities under insurance contracts 17,318 274 17,476 323 Present Value Method with actuarial techniques Mortality tables and yield curves (*) The internal models of level 2 implement figures based on the parameters observed in the market, while level 3 internal models use significant inputs that are not observable in market data. (**) Includes mainly short-term loans/deposits and repurchase/reverse repurchase agreements with corporate customers (mainly brokerage and investment companies). (***) Includes mainly structured loans to corporate clients. Level 3 financial instruments Set forth below are the Group’s main financial instruments measured using unobservable market data as significant inputs of the internal models (level 3): • HTC&S (Hold to collect and sale) syndicated loans classified in the fair value category with changes in other comprehensive income, where the cost of liquidity is not directly observable in the market, as well as the prepayment option in favour of the borrower. • Illiquid equity instruments in non-trading portfolios, classified at fair value through profit or loss and at fair value through equity. • Instruments in Santander UK’s portfolio (loans, debt instruments and derivatives) linked to the House Price Index (HPI). Even if the valuation techniques used for these instruments may be the same as those used to value similar products (present value in the case of loans and debt instruments, and the Black-Scholes model for derivatives), the main factors used in the valuation of these instruments are the HPI spot rate, the growth and volatility thereof, and the mortality rates, which are not always observable in the market and, accordingly, these instruments are considered illiquid. • Callable interest rate derivatives (Bermudan-style options) where the main unobservable input is mean reversion of interest rates. • Trading derivatives on interest rates, taking as an underlying asset titling and with the amortization rate (CPR, Conditional prepayment rate) as unobservable main entry. • Derivatives from trading on inflation in Spain, where volatility is not observable in the market. • Equity volatility derivatives, specifically indices and equities, where volatility is not observable in the long term. • Derivatives on long-term interest rate and FX in some units (mainly South America) where for certain underlyings it is not possible to demonstrate observability to these terms. • Debt instruments referenced to certain illiquid interest rates, for which there is no reasonable market observability. The measurements obtained using the internal models might have been different if other methods or assumptions had 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 interim condensed consolidated balance sheet and the gains and losses arising from these financial instruments are reasonable. The net amount recorded in the results of the first six months of 2024 arising from models whose significant inputs are unobservable market data (level 3) amounted to EUR 160 million profit (EUR 178 million in the first six months of 2023). The table below shows the effect, at 30 June 2024 and 31 December 2023, 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: 30/06/2024 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Financial assets held for trading Loans and advances to customers Repos/Reverse repos Others Long-term repo spread n.a. n.a. (0.07) 0.00 Debt securities Corporate debt Discounted Cash Flows Credit spread 0% - 10% 5.07% (4.88) 5.03 Government debt Discounted Cash Flows Discount curve 0% - 8% 3.99% (6.86) 6.82 Others Discounted Cash Flows Credit spread 10% - 90% 33.53% (0.45) 0.18 Derivatives Cap&Floor Forward estimation Interest rate (2)bp - 2bp 0.02bp (0.02) 0.02 EQ Options EQ option pricing model Volatility 0% - 70% 42.49% (0.41) 0.63 EQ Options Local volatility Volatility 10% - 90% 50.00% (6.22) 6.22 Fx Options Fx option pricing model Volatility 0% - 40% 20.81% (0.53) 0.57 Inflation Derivatives Asset Swap model Inflation Swap Rate 2% - 8% 4.35% (0.32) 0.20 IR Options IR option pricing model Volatility 0% - 30% 17.56% (0.20) 0.28 IRS Others Others 5% - n.a. n.a. (2.30) 0.00 IRS Discounted Cash Flows Credit spread 70.9% - 322.7% 209.79% (1.71) 2.11 IRS Discounted Cash Flows Swap rate 9% - 10% 9.57% (0.69) 0.92 IRS Forward estimation Interest rate 60bps - 300bps 181.5bps (2.87) 2.94 IRS Prepayment modelling Prepayment rate 2.5% - 9.0% 9.00% 0.00 0.03 Property derivatives Option pricing model Growth rate (6)% - 5% 0.00% (3.78) 3.78 Securitisation Swap Discounted Cash Flows Constant prepayment rates (25.2)% - 30.8% 2.80% (5.59) 5.59 Structured notes Price based Price (10)% - 10% 0.00% (1.53) 1.53 Financial assets designated at fair value through profit or loss Loans and advances to customers Loans Discounted Cash Flows Credit spreads 0.1% - 2% 1.05% (0.19) 0.19 Mortgage portfolio Black Scholes model Growth rate (5)% - 5% 0.00% (0.24) 0.24 Debt securities Other debt securities Others Inflation Swap Rate 0% - 8% 3.89% (4.11) 3.90 30/06/2024 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Non-trading financial assets mandatorily at fair value through profit or loss Debt securities Property securities Probability weighting Growth rate (5)% - 5% 0.00% (0.35) 0.35 Equity instruments Equities Price Based Price 90% - 110% 100% (171.92) 171.92 Financial assets at fair value through other comprehensive income Loans and advances to customers Loans Discounted Cash Flows Credit spread 10% - 90% 10.00% (19.50) 0.00 Loans Discounted Cash Flows Interest rate curve 4.5% - 8.1% 6.28% (0.57) 0.57 Loans Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (20.30) 20.30 Loans Forward estimation Credit spread 167.7bps - 365.8bps 167.74bps (0.20) 0.00 Loans Market price Market price (10)% - 20% 0.00% (2.78) 1.39 Debt securities Corporate debt Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (0.09) 0.09 Government debt Discounted Cash Flows Interest rate 0.4% - 2.4% 1.42% 0.00 0.00 Mortgage Letters Discounted Cash Flows Mortgage Letters 5.9% - 6.2% 6.08% 0.13 0.13 Equity instruments Equities Price Based Price 90% - 110% 100.00% (35.46) 35.46 Financial liabilities held for trading Derivatives Cap&Floor Volatility option model Volatility 10% - 90% 50.62% (0.04) 0.04 FX Options Volatility option model Volatility 10% - 90% 36.10% (0.44) 0.21 IRS Discounted Cash Flows Inflation Swap Rate 10% - 99% 50.54% (4.17) 4.26 Swaptions Volatility option model Volatility 60bps - 114bps 70.47bps (5.77) 1.39 31/12/2023 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Financial assets held for trading Loans and advances to customers Repos/Reverse repos Other Long-term repo spread n.a. n.a. (0.08) — Debt securities Corporate debt Discounted Cash Flows Credit spread 0% - 10% 5.01% (1.90) 1.90 Government debt Discounted Cash Flows Discount curve 0% - 8% 3.99% (7.77) 7.72 Derivatives CCS Forward estimation Interest rate (6)bps - 6bps 0.40bps (0.90) 1.03 CDS Credit default models Illiquid credit default spread curves 100bps - 200bps 149.14bps (0.14) 0.14 EQ Options EQ option pricing model Volatility 0% - 70% 44.39% (0.51) 0.89 EQ Options Local volatility Volatility 10% - 90% 50.00% (1.26) 1.26 Fx Options Fx option pricing model Volatility 0% - 40% 20.81% (0.55) 0.59 Inflation Derivatives Asset Swap model Inflation Swap Rate 2% - 8% 4.18% (0.28) 0.16 IR Options IR option pricing model Volatility 0.4% - 32.2% 18.86% (0.29) 0.41 IRS Others Others 5% - n.a n.a (1.25) — IRS Discounted Cash Flows Credit spread 2.6% - 8.3% 5.60% (1.97) 2.18 IRS Discounted Cash Flows Swap rate 9.4% - 9.8% 9.60% (1.01) 0.95 IRS Forward estimation Interest rate (5.2)bps - 5.2bps 0.09bps (0.03) 0.03 IRS Prepayment modelling Prepayment rate 2.5% - 6.2% 4.17% (0.06) 0.05 Property derivatives Option pricing model Growth rate (5)% - 5% 0.00% (3.92) 3.92 Securitisation Swap Discounted Cash Flows Constant prepayment rates (22.30)% - 27.20% 2.47% (4.95) 4.95 Structured notes Price based Price (10)% - 10% 0.00% (1.53) 1.53 Financial assets designated at fair value through profit or loss Loans and advances to customers Loans Discounted Cash Flows Credit spreads 0.1% - 3% 1.55% (0.21) 0.21 Mortgage portfolio Black Scholes model Growth rate (5)% - 5% 0.00% (0.23) 0.23 Debt securities Other debt securities Others Inflation Swap Rate 0% - 8% 3.89% (4.48) 4.25 31/12/2023 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Non-trading financial assets mandatorily at fair value through profit or loss Debt securities Property securities Probability weighting Growth rate (5)% - 5% 0.00% (0.35) 0.35 Equity instruments Equities Price Based Price 90% - 110% 100.00% (149.49) 149.49 Financial assets at fair value through other comprehensive income Loans and advances to customers Loans Discounted Cash Flows Credit spread n.a. n.a (20.80) 0.00 Loans Discounted Cash Flows Interest rate curve 4.6% - 9.0% 6.80% (0.68) 0.68 Loans Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (20.30) 20.30 Loans Forward estimation Credit spread 167.7bps - 365.8bps 167.74bps (3.46) 0.00 Loans Market price Market price (10)% - 20% 0.00% (5.02) 2.51 Debt securities Corporate debt Discounted Cash Flows Margin of a reference portfolio (1)% - 1% 0.00% (0.09) 0.09 Government debt Discounted Cash Flows Interest rate 0% - 2% 0.99% 0.00 0.00 Equity instruments Equities Price Based Price 90% - 110% 100.00% (49.24) 49.24 Financial liabilities held for trading Derivatives Cap&Floor Volatility option model Volatility 10% - 90% 39.03% (0.45) 0.25 CMS Discounted Cash Flows Volatility 10% - 90% 47.66% 0.00 0.00 Fx Options Volatility option model Volatility 10% - 90% 28.09% (0.45) 0.13 IRS Discounted Cash Flows Inflation Swap Rate 10% - 90% 39.03% (0.45) 0.25 Swaptions Volatility option model Volatility 10% - 90% 35.55% 0.21 0.10 1. For each instrument, the valuation technique is shown, the unobservable inputs described in the "Main unobservable inputs" column under probable scenarios, variation range, average value and impact resulting from valuing the position in the established maximum and minimum range. 2. The breakdown of impacts is shown by type of instrument and unobservable inputs. 3. The estimation of the range of variation of the unobservable inputs has been carried out taking into account plausible movements of said parameters depending on the type of instrument. 4. Zero impacts from fully hedged or back-to-back transactions have not been included in this exercise. Lastly, the changes in the financial instruments classified as level 3 in the first six months of 2024 and 2023 were as follows: 01-01-2024 Changes 30-06-2024 EUR million Fair value calculated using internal models (Level 3) Purchases/Settlements Sales/Amortisation Changes in fair value recognized in profit or loss Changes in fair value recognised in equity Level reclassifications Other Fair value calculated using internal models (Level 3) Financial assets held for trading 2,086 726 (194) 33 — (566) (42) 2,043 Customers 24 275 (24) 2 — 30 — 307 Debt instruments 914 84 (2) (18) — (428) (16) 534 Equity instruments 1 — — — — — — 1 Trading derivatives 1,147 367 (168) 49 — (168) (26) 1,201 Swaps 577 281 (94) (3) — 38 — 799 Exchange rate options 9 — (1) 3 — (2) (1) 8 Interest rate options 153 — — (16) — (107) — 30 Index and securities options 235 11 (47) 79 — (66) (16) 196 Other 173 75 (26) (14) — (31) (9) 168 Financial assets designated at fair value through profit or loss 181 593 (126) 28 — 61 (28) 709 Loans and advances to customers 31 188 (3) (8) — — 16 224 Debt instruments 150 405 (123) 36 — 61 (44) 485 Non-trading financial assets mandatorily at fair value through profit or loss 2,095 167 (189) 71 — (69) 20 2,095 Loans and advances to customers 287 43 (97) 45 — (140) (6) 132 Debt instruments 313 5 (73) 2 — — (3) 244 Equity instruments 1,495 119 (19) 24 — 71 29 1,719 Financial assets at fair value through other comprehensive income 5,989 3,034 (2,522) — (123) 23 (53) 6,348 Loans and advances to customers 4,938 2,845 (2,505) — 20 16 2 5,316 Debt instruments 559 186 (2) — (17) 7 (56) 677 Equity instruments 492 3 (15) — (126) — 1 355 TOTAL ASSETS 10,351 4,520 (3,031) 132 (123) (551) (103) 11,195 Financial liabilities held for trading 869 293 (135) (46) — (166) (13) 802 Trading derivatives 869 293 (135) (46) — (166) (13) 802 Swaps 388 84 (23) (52) — (93) — 304 Exchange rate options 8 — (1) (4) — (2) (1) — Interest rate options 139 1 (19) 7 — (64) 1 65 Index and securities options 187 1 (17) 71 — (7) (13) 222 Others 147 207 (75) (68) — — — 211 Hedging derivatives (Liabilities) 6 — — (1) — — — 5 Swaps 6 — — (2) — — — 4 Interest rate options — — — 1 — — — 1 Financial liabilities designated at fair value through profit or loss 29 264 (8) 38 — 29 — 352 Liabilities under insurance contracts 323 — — (19) — — (30) 274 TOTAL LIABILITIES 1,227 557 (143) (28) — (137) (43) 1,433 01-01-2023 Changes 30-06-2023 EUR million Fair value calculated using internal models (Level 3) Purchases/Settlements Sales/Amortisation Changes in fair value recognized in profit or loss Changes in fair value recognised in equity Level reclassifications Other Fair value calculated using internal models (Level 3) Financial assets held for trading 383 198 (72) 77 — 303 151 1,040 Debt instruments 42 52 (4) 1 — 316 6 413 Equity instruments 1 — — — — — — 1 Trading derivatives 340 146 (68) 77 — (13) (1) 481 Swaps 139 — (3) 93 — — (12) 217 Exchange rate options 4 — — (1) — — — 3 Interest rate options 39 — — (10) — — — 29 Index and securities options 48 52 — 3 — (23) 5 85 Other 110 94 (65) (8) — 10 6 147 Financial assets designated at fair value through profit or loss 427 — — (40) — — 30 417 Loans and advances to customers 5 — — — — — — 5 Debt instruments 422 — — (40) — — 30 412 Non-trading financial assets mandatorily at fair value through profit or loss 1,833 163 (116) 48 — — (16) 1,912 Loans and advances to customers 239 59 (63) (16) — — 9 228 Debt instruments 325 32 (25) 3 — — 2 337 Equity instruments 1,269 72 (28) 61 — — (27) 1,347 Financial assets at fair value through other comprehensive income 5,647 4,197 (3,595) — (222) 505 86 6,618 Loans and advances to customers 4,718 4,196 (3,590) — 23 473 39 5,859 Debt instruments 229 — (3) — (1) 32 6 263 Equity instruments 700 1 (2) — (244) — 41 496 TOTAL ASSETS 8,290 4,558 (3,783) 85 (222) 809 251 9,988 Financial liabilities held for trading 415 304 (101) (91) — (118) (7) 402 Trading derivatives 415 304 (101) (91) — (118) (7) 402 Swaps 235 104 (70) (25) — (97) (14) 133 Exchange rate options — 24 (24) — — — — — Interest rate options 19 7 (1) (3) — — — 22 Index and securities options 42 38 (6) 3 — (21) 7 63 Others 119 131 — (66) — — — 184 Hedging derivatives (Liabilities) 14 — — 3 — 36 — 53 Swaps 14 — — 3 — 36 — 53 Financial liabilities designated at fair value through profit or loss 151 — (5) 1 — — (147) — Liabilities under insurance contracts 345 — — (6) — — 26 365 TOTAL LIABILITIES 925 304 (106) (93) — (82) (128) 820 The following terms are used 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: • Collateral: the appraisal amount or valuation amount of the collateral received; for each transaction it cannot be higher than the covered amount of exposure. 30-06-2024 Total Of which: impaired Without collateral With collateral Without collateral With collateral Maximum amount of the actual collateral that can be considered Maximum amount of the actual collateral that can be considered Amounts in million euros, except number of transactions in units Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Credit entities — — — — — — — — — — — — — — Public sector 13,541 417 49 7 2 — 4 8 3 7 1 1 — 3 Other financial institutions and: individual shareholder 940 83 679 233 83 106 53 438 22 340 61 21 10 43 Non financial institutions and individual shareholder 594,786 6,496 53,944 6,716 3,883 1,555 3,134 312,108 2,922 33,165 3,302 1,863 659 2,712 Of which: Financing for constructions and property development 13,477 93 1,933 552 460 38 128 7,480 52 1,054 216 157 23 101 Other warehouses 3,803,716 5,369 481,815 10,090 4,576 3,782 4,195 1,735,175 2,321 291,622 5,343 1,705 2,382 3,273 Total 4,412,983 12,365 536,487 17,046 8,544 5,443 7,386 2,047,729 5,268 325,134 8,707 3,590 3,051 6,031 Financing classified as non-current assets and disposable groups of items that have been classified as held for sale — — — — — — — — — — — — — — 31-12-2023 Total Of which: impaired Without collateral With collateral Without collateral With collateral Maximum amount of the actual collateral that can be considered Maximum amount of the actual collateral that can be considered Amounts in million euros, except number of transactions in units Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Credit entities — — — — — — — — — — — — — — Public sector 12,851 437 37 5 2 — 4 7 3 7 1 1 — 3 Other financial institutions and: individual shareholder 1,011 258 833 285 38 182 58 472 25 428 107 21 51 50 Non financial institutions and individual shareholder 728,123 7,709 61,110 6,977 4,079 1,461 3,543 385,859 3,307 37,225 3,751 2,134 709 3,078 Of which: Financing for constructions and property development 14,236 106 2,035 506 415 41 134 7,759 56 1,155 235 183 18 112 Other warehouses 4,400,346 6,107 507,378 10,185 4,602 4,043 4,484 2,092,099 2,593 293,433 5,257 1,744 2,394 3,415 Total 5,142,331 14,511 569,358 17,452 8,721 5,686 8,089 2,478,437 5,928 331,093 9,116 3,900 3,154 6,546 Financing classified as non-current assets and disposable groups of items that have been classified as held for sale — — — — — — — — — — — — — — c) Real estate business – Spain i) Portfolio of home purchase loans to families Home purchase loans granted to families in Spain on 30 June 2024 amounted to EUR 60,431 million (EUR 61,097 million at 31 December 2023). Of which mortgage collateral are 99.66%: Million euros 30-06-2024 31-12-2023 Gross Amount Of which: impaired Gross Amount Of which: impaired Home purchase loans to families 60,431 959 61,097 924 -Without mortgage collateral 203 14 215 16 - With mortgage collateral 60,228 945 60,882 908 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 mor tgages 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 st ood at 24%. • 93% of the portfolio has a LTV below 80%, calcula ted a s total risk/latest available house appraisal. 30-06-2024 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 17,665 20,089 18,003 3,234 1,237 60,228 Of which: impaired 119 177 217 167 265 945 31-12-2023 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 18,728 20,720 18,083 2,294 1,057 60,882 Of which: impaired 131 192 199 151 235 908 ii) Financing construction and property development At 30 June 2024 and 31 December 2023 the financing amount related to construction and real estate business in Spain amounted to EUR 2,491 million and EUR 2,393 million net of allowances, respectively. 30-06-2024 Million euros Gross amount Excess of gross exposure over maximum recoverable amount of effective collateral Specific allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 2,525 278 34 Of which: watchlist/ impaired 54 5 25 Memorandum items: Written-off assets 345 31-12-2023 Million euros Gross amount Excess of gross exposure over maximum recoverable amount of effective collateral Specific allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 2,433 259 40 Of which: watchlist/ impaired 74 5 29 Memorandum items: Written-off assets 346 30-06-2024 31-12-2023 Million euros Carrying amount Memorandum items: Total loans and advances to customers excluding the public sector (business in Spain) (book value) 244,349 241,695 Total consolidated assets (Total business) (book value) 1,786,261 1,797,062 Impairment losses and provision for exposure classified as normal (business in Spain) 1,162 1,230 At the end 30 J

Additional disclosure requireme

Additional disclosure requirements	6 Months Ended
	Jun. 30, 2024
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Additional disclosure requirements	Additional disclosure requirements This note includes relevant information about additional disclosure requirements. 17.1 Parent company financial statements Following are the summarised unaudited condensed balance sheets of Banco Santander, S.A. as of 30 June 2024 and 31 December 2023. In the financial information of the Parent, investments in subsidiaries, jointly controlled entities and associates are recorded at cost. UNAUDITED CONDENSED BALANCE SHEETS 30 June 2024 31 December 2023 (Parent company only) (Millions of Euros) Assets Cash and due from banks 130,150 172,524 Of which: To bank subsidiaries 7,476 6,834 Trading account assets 116,064 102,296 Investment securities 72,272 63,325 Of which: To bank subsidiaries 17,403 16,137 To non-bank subsidiaries 992 1,229 Net Loans and leases 311,285 298,068 Of which: To non-bank subsidiaries 21,680 22,435 Investment in affiliated companies 100,430 99,326 Of which: To bank subsidiaries 74,374 74,016 To non-bank subsidiaries 26,056 25,310 Premises and equipment, net 6,216 6,368 Other assets 15,099 15,435 Total assets 751,517 757,342 Liabilities Deposits 369,131 398,374 Of which: To bank subsidiaries 4,489 7,832 To non-bank subsidiaries 17,123 14,610 Short-term debt 95,981 70,771 Long-term debt 120,371 129,258 Total debt 216,352 200,029 Of which: To bank subsidiaries 50 — To non-bank subsidiaries 1,193 1,816 Other liabilities 89,178 84,065 Total liabilities 674,661 682,468 Stockholders' equity Capital stock 7,747 8,092 Retained earnings and other reserves 69,109 66,782 Total stockholders' equity 76,856 74,874 Total liabilities and Stockholders’ Equity 751,517 757,342 Following are the summarised unaudited condensed statements of income of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED STATEMENTS OF INCOME Six months ended Six months ended (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) Interest income 18,184 13,380 Interest from earning assets 14,014 10,249 Dividends from affiliated companies 4,170 3,131 Of which: From bank subsidiaries 3,747 2,618 From non-bank subsidiaries 423 513 Interest expense (9,993) (6,938) Interest income / (Charges) 8,191 6,442 Provision for credit losses (658) (755) Interest income / (Charges) after provision for credit losses 7,532 5,687 Non-interest income: 2,724 2,397 Non-interest expense: (4,517) (4,187) Income before income taxes 5,739 3,897 Income tax expense (337) (243) Net income 5,402 3,654 Following are the summarised unaudited condensed statements of comprehensive income of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED STATEMENTS OF Six months ended Six months ended COMPREHENSIVE INCOME (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) NET INCOME 5,402 3,654 OTHER COMPREHENSIVE INCOME 71 (183) Items that may be reclassified subsequently to profit or loss 93 104 Hedging instruments (items not designated) — — Revaluation gains (losses) — — Amounts transferred to income statement — — Other reclassifications — — Debt instruments at fair value with changes in other comprehensive income (26) 43 Revaluation gains (losses) (95) 38 Amounts transferred to income statement 69 5 Other reclassifications — — Cash flow hedges: 163 133 Revaluation gains/(losses) (13) (24) Amounts transferred to income statement 176 157 Amounts transferred to initial carrying amount of hedged items — — Other reclassifications — — Hedges of net investments in foreign operations: — — Exchange differences — — Non-current assets held for sale — — Income tax (44) (72) Items that will not be reclassified to profit or loss: (22) (287) Actuarial gains/(losses) on pension plans 2 12 Other recognised income and expense of investments in subsidiaries, joint ventures and associates — — Changes in the fair value of equity instruments measured at fair value through other comprehensive income 17 (275) Gains or losses resulting from the accounting for hedges of equity instruments measured at fair value through other comprehensive income, net — — Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedged item) 4 (41) Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedging instrument) (4) 41 Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk (61) (34) Income tax relating to items that will not be reclassified 20 10 TOTAL COMPREHENSIVE INCOME 5,473 3,471 Following are the summarised unaudited condensed cash flow statements of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED CASH FLOW STATEMENTS Six months ended Six months ended (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 5,402 3,654 Adjustments to profit (2,740) 2,080 Net increase/decrease in operating assets (45,848) (10,186) Net increase/decrease in operating liabilities (11,864) (14,608) Reimbursements/payments of income tax 1,063 1,134 Total net cash flows from operating activities (1) (53,987) (17,926) 2. Cash flows from investing activities Investments (-) (1,850) (2,438) Divestments (+) 4,285 4,099 Total net cash flows from investment activities (2) 2,435 1,661 3. Cash flows from financing activities Issuance of own equity instruments — — Disposal of own equity instruments 302 336 Acquisition of own equity instruments (2,032) (1,622) Issuance of debt securities 3,908 1,500 Redemption of debt securities (2,994) (438) Dividends paid (1,485) (963) Issuance/Redemption of equity instruments — — Other collections/payments related to financing activities (151) (87) Total net cash flows from financing activities (3) (2,452) (1,274) 4. Effect of exchange rate changes on cash and cash equivalents (4) 1,156 (429) 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) (52,848) (17,968) Cash and cash equivalents at beginning of period 125,020 130,083 Cash and cash equivalents at end of period 72,172 112,115 17.2 Preference Shares and Preferred Securities The following table shows the balance of the preference shares and preferred securities as of 30 June 2024 and 31 December 2023: 30 June 2024 31 December 2023 (Millions of Euros) Preference shares 207 202 Preferred securities 8,281 9,081 Total at period-end 8,488 9,283 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 30 June 2024 and 31 December 2023. 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. Preferred securities include non-cumulative preferred non-voting securities issued by Banco Santander, S.A. 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 obtaining 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 Part 1 of our 2023 Form 20-F filed with the SEC on 21 February 2024 and Note 9.b. to our consolidated financial statements in Part 1 of this report. Outstanding at 30 June 2024 Amount in Preference Shares currency Interest rate Redemption Issuer/Date of issue Currency (million) Option (A) Santander UK plc, October 1995 Pounds Sterling 80.3 10.375 % No option Santander UK plc, February 1996 Pounds Sterling 80.3 10.375 % No option Outstanding at 30 June 2024 Amount in Preferred Securities currency Interest rate Maturity date Issuer/Date of issue Currency (million) Banco Santander, S.A. Banco Santander, S.A., March 2018 Euro 187.6 4.75 % (B) Perpetuity Banco Santander, S.A., January 2020 Euro 1,498.6 4.375 % (C) Perpetuity Banco Santander, S.A., May 2021 US Dollar 1,000.0 4.75 % (D) Perpetuity Banco Santander, S.A., May 2021 Euro 750.0 4.125 % (E) Perpetuity Banco Santander, S.A., September 2021 Euro 990.0 3.625 % (F) Perpetuity Banco Santander, S.A., November 2023 US Dollar 1,149.6 9.625 % (G) Perpetuity Banco Santander, S.A., November 2023 US Dollar 1,349.8 9.625 % (H) Perpetuity Banco Santander, S.A., May 2024 Euro 1,500.0 7.00 % (I) 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 A.From these dates the issuer can redeem the shares, subject to prior authorization by the national supervisor. B.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.75% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 409.7 basis points on the 5-year Mid-Swap Rate. C.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.375% interest rate is set for the first six years. After that, it will be reviewed every 5 years by applying a margin of 453.4 basis points on the 5-year Mid-Swap Rate. D.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.750% interest rate is set for the first six years, revised every 5 years thereafter by applying a margin of 375.3 basis points over the 5-year UST rate. E.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.125% interest rate is set for the first seven years, revised every 5 years thereafter by applying a margin of 431.1 basis points over the applicable 5-year Euro Mid-Swap Rate. F.Payment is subject to certain conditions and to the discretion of Banco Santander. The 3.625% interest rate is set for the first eight years, revised every 5 years thereafter by applying a margin of 376 basis points over the 5-year Mid-Swap Rate. G.Payment is subject to certain conditions and to the discretion of Banco Santander. The 9.625% interest rate is set for the first five years and six months, revised every 5 years thereafter by applying a margin of 530.6 basis points on the 5-year UST rate. H.Payment is subject to certain conditions and to the discretion of Banco Santander. The 9.625% interest rate is set for the first ten years, revised every 5 years thereafter by applying a margin of 529.8 basis points on the 5-year UST rate. I.Payment is subject to certain conditions and to the discretion of Banco Santander. The 7.00% interest rate is set for the first six years, revised every 5 years thereafter by applying a margin of 443.2 basis points on the 5-year Mid-Swap rate. Santander Finance Preferred, S.A. (Unipersonal) - issuer of registered securities guaranteed by Banco Santander, S.A. until November 2017, merged on that date with Banco Santander, S.A.

Introduction, basis of presen_2

Introduction, basis of presentation of the interim condensed consolidated financial statements and other information (Policies)	6 Months Ended
	Jun. 30, 2024
Disclosure of reclassifications or changes in presentation [abstract]
Basis of presentation of the interim financial statements	Basis of presentation of the interim financial statements Under Regulation (EC) n.º 1606/2002 of the European Parliament and of the Council of 19 July 2002 all companies governed by the law of an EU Member State and whose securities are admitted to trading on a regulated market of any Member State must prepare their consolidated financial statements for the years beginning on or after 1 January, 2005 in conformity with the International Financial Reporting Standards ('IFRS') previously adopted by the European Union ('EU-IFRS'). In order to adapt the accounting system of Spanish credit institutions with the principles and criteria established by the IFRS adopted by the European Union ('EU-IFRS'), the Bank of Spain published circular 4/2017, dated 27 November 2017, and subsequent changes, on Public and Confidential Financial Reporting Standards and Financial Statement Formats. The consolidated annual accounts for 2023 were authorised at the board of directors meeting on 19 February 2024 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 Grupo Santander’s consolidated equity and consolidated financial position at 31 December 2023 and the consolidated results of its operations, and the consolidated cash flows in 2022. The aforementioned consolidated annual accounts, which are included in Grupo Santander’s Form 20-F filed with the U.S. Securities and Exchange Commission on 21 February 2024, 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 financial statements in accordance with the provisions of article 12 of Royal Decree 1362/2007 taking into account the requirements of Circular 3/2018, of June 28, of the Securities and Exchange Commission (CNMV). These interim financial statements will be included in the Half-Yearly Financial Information corresponding to the first half of 2024 that the Group presents in accordance with the aforementioned Circular 3/2018. In accordance with IAS 34, 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 first six months, 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 IFRS and, accordingly, for a proper comprehension of the information included in these interim financial statements, they should be read together with Grupo Santander’s consolidated annual accounts for the year ended 31 December 2023. Grupo Santander 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 2023. 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 Grupo Santander. The accounting policies and methods used in preparing these interim financial statements are the same as those applied in the consolidated annual accounts for 2023 taking into account the standards and interpretations with effective application date during the first six months of 2024, which are detailed below: • Amendment to IFRS 16 Lease Liability in a Sale and Leaseback requires a seller-lessee to subsequently measure lease liabilities arising from a leaseback without recognising any amount of the gain or loss that relates to the right of use retained. This new requirement does not prevent a seller-lessee from recognising in profit or loss any gain or loss relating to the partial or full termination of a lease. Applicable, retrospectively, from 1 January 2024. • Classification of Liabilities, amendments to IAS 1 Presentation of Financial Statements, considering non-current liabilities those in which the entity has the possibility of deferring payment for more than 12 months from the closing date of the reporting period. Likewise, an additional amendment to IAS 1 on the classification of liabilities with covenants as current or non-current has been approved, specifying that covenants that must be complied with after the reporting date do not affect the classification of liabilities and require additionally their respective breakdowns. They should be applied retrospectively in accordance with the normal requirements of IAS 8 Accounting Policies, Changes in Accounting Estimates and Errors. Applicable from 1 January 2024. • IAS 7 Statement of Cash Flows and IFRS 7 Financial Instruments: Additional disclosures are required for companies entering into supplier financing arrangements. The objective of the new disclosures is to provide information on Supplier Finance Arrangements (SFA) that allows investors to evaluate the effects on an entity's liabilities, cash flows and liquidity risk exposure (effective from 1 January 2024). The aforementioned accounting standards and modifications have not had a significant effect on Grupo Santander’s financial statements, except for what was disclosed before. All accounting policies and measurement bases with a material effect on the interim financial statements for 30 June 2024 were applied in their preparation. By the time of the preparation of these interim financial statements, there are no standards pending adoption by the European Union for the current exercise by the IASB with an effective date of 1 January 2024.
Use of critical estimates	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 Banco Santander 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 2023, except for those indicated in these interim financial statements due to the accounting standards and modifications that have come into effect during the first six months of the year 2024. The interim financial statements contain estimates made by the senior management of Banco Santander and of the consolidated entities in order to quantify certain of the assets, liabilities, income, expenses and obligations reported in the consolidated entities. These estimates, which were made on the basis of the best information available, relate mainly to the following: • The income tax expense, which is recognised in interim periods based on the best estimate of the weighted average tax rate expected by Grupo Santander for the full financial year; • 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; • The assumptions used in the calculation of the post-employment benefit liabilities and commitments and other obligations; • The useful life of the tangible and intangible assets; • The measurement of goodwill impairment arising on consolidation; • The calculation of provisions and the consideration of contingent liabilities; • The fair value of certain unquoted assets and liabilities; • The recoverability of deferred tax assets; and • The fair value of the identifiable assets acquired and the liabilities assumed in business combinations in accordance with IFRS 3. To update the previous estimates, the Group's management has taken into account the current macroeconomic scenario resulting from the complex geopolitical situation, the levels of inflation and interest rates, as well as the resilience of the labour market being a priority monitoring focus due to the potential uncertainty generated in the Group's estimates. The Group's management has evaluated in particular the uncertainties caused by the current environment in relation to credit, liquidity and market risks, taking into account the best available information, to estimate the impact on the credit portfolio's impairment provision, and in the debt instruments' interest rates and valuation. In addition, the Group has applied in the interim financial statements a new theoretical exchange rate for the Argentine peso (1,499 pesos on 30 June 2024). This decision is due to the significant divergence that has been observed between the official exchange rate and other macroeconomic magnitudes, mainly inflation. The new theoretical exchange rate also reflects the implicit exchange rate observed in certain transactions ordered between market participants under the prevailing economic conditions, such as the repatriation of dividends from businesses in Argentina. This matter has not had a material impact in the Group’s interim financial statements. During the six-month period ended 30 June 2024, there have been no additional significant changes in the estimates made at the end of 2023, other than those indicated in these interim financial statements.
Contingent assets and liabilities	Contingent assets and liabilities Note 25 to Grupo Santander's consolidated annual accounts for the year ended 31 December 2023 includes information on the contingent assets and liabilities at that date. There were no significant changes in Grupo Santander's contingent assets and liabilities from 31 December 2023 to the date of formal preparation of these interim financial statements.

Shareholder remuneration syst_2

Shareholder remuneration system and earnings per share (Tables)	6 Months Ended
	Jun. 30, 2024
Earnings per share [abstract]
Schedule of shareholder remuneration	The cash remuneration paid by Banco Santander to its shareholders in the first six months of 2024 and 2023 was as follows: 30-06-2024 30-06-2023 % of par Euros per Amount % of par Euros per Amount Ordinary shares 0.1917 0.095 1,485 11.90 % 0.0595 963 Other shares (without vote, redeemable, etc.) — — — — — — Total remuneration paid 0.1917 0.095 1,485 11.90 % 0.0595 963 Dividend paid out of profit 0.1917 0.095 1,485 11.90 % 0.0595 963 Dividend paid with a charge to reserves or share premium — — — — — — Dividend in kind — — — — — — Flexible payment — — — — — —
Schedule of basic and diluted earnings per share	Basic earnings per share for the period are calculated by dividing the net profit attributable to Grupo Santander for the first six months 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: 30-06-2024 30-06-2023 Profit attributable to the Parent (EUR million) 6,059 5,241 Remuneration of contingently convertible preferred securities (CCPS) (EUR million) (309) (229) 5,750 5,012 Of which: Profit or Loss from discontinued operations (non controlling interest net) (EUR million) — — Profit or Loss from continuing operations (CCPS net) (EUR million) 5,750 5,012 Weighted average number of shares outstanding 15,664,707,190 16,279,041,269 Basic earnings per share (euros) 0.37 0.31 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.37 0.31 ii. Diluted earnings per share Diluted earnings per share for the period are calculated by dividing the net profit attributable to Grupo Santander for the first six months 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: 30-06-2024 30-06-2023 Profit attributable to the Parent (EUR million) 6,059 5,241 Remuneration of contingently convertible preferred securities (CCPS) (EUR million) (309) (229) 5,750 5,012 Of which: Profit or Loss from discontinued operations (non controlling interest net) (EUR million) — — Profit or Loss from continuing operations (CCPS net) (EUR million) 5,750 5,012 Weighted average number of shares outstanding 15,664,707,190 16,279,041,269 Dilutive effect of options/receipt of shares 70,622,287 67,704,709 Adjusted number of shares 15,735,329,477 16,346,745,978 Diluted earnings per share (euros) 0.37 0.31 Of which: from discontinued operations (euros) — — from continuing operations (euros) 0.37 0.31

Remuneration and other benefi_2

Remuneration and other benefits paid to Banco Santander’s directors and senior managers (Tables)	6 Months Ended
	Jun. 30, 2024
Remuneration And Other Benefits [Abstract]
Schedule of total remuneration paid	Following is a summary of the most significant data on the remunerations and benefits for the six-month periods ended 30 June 2024 and 2023: Remuneration of members of the board of directors (1) EUR thousand 30-06-2024 30-06-2023 Members of the board of directors: (2) Remuneration concept Fixed salary remuneration of executive directors 3,292 3,136 Variable salary remuneration of executive directors — — Directors' fees 597 628 Bylaw-stipulated emoluments (annual emolument) 1,754 2,113 Other 2,173 2,083 Sub-total 7,816 7,960 Transactions with shares and/or other financial instruments — — 7,816 7,960 1. The Notes to the consolidated annual accounts for 2024 will contain detailed and complete information on the remuneration paid to all the directors, including executive directors. 2. From 1 October 2023, the Lead Independent Director, non-executive Vice Chair and Chair of remuneration committee is Mr. Glenn Hutchins, succeeding Mr. Carnegie-Brown. From 27 June 2024, Mr. Carlos Barrabés, in replacement of Mr. Ramiro Mato, and Mr. Antonio Francesco Weiss joined the board. Mr. Bruce Carnegie-Brown stepped down as member of the board on 23 March 2024. Mr. Ramiro Mato stepped down as member of the board on 27 June 2024. The table below includes the corresponding amounts related to remunerations of senior management at 30 June 2024 and 2023, excluding the executive directors: EUR thousand 30-06-2024 30-06-2023 Senior management (1) Total remuneration of senior management (2) 13,423 12,761 1. Remunerations received during the first six months by members of the senior management who ce ased in their functions by 30 June 2024, amounted to EUR 2,594 thousand (EUR 511 thousand by 30 June 2023). 2. The number of members of Banco Santander's senior management, excluding executive directors, is 13 as at 30 June 2024 ( 14 persons at 30 June 2023)
Schedule of other benefits of members of the board of directors	EUR thousand 30-06-2024 30-06-2023 Members of the board of directors Other benefits Advances — — Loans granted 99 144 Pension funds and plans: Endowments and/or contributions (1) 1,197 1,055 Pension funds and plans: Accumulated rights (2) 73,481 66,792 Life insurance premiums 720 563 Guarantees provided for directors — — 1. These correspond to the endowments and/or contributions made during the first six months of 2024 and 2023 in respect of retirement pensions, widowhood, orphanhood and permanent disability. 2. Corresponds to the rights accru ed by the directors in matters of pensions. Additionally, former members of the board had at 30 June 2024 and 30 June 2023 rights accrued for this concept for EUR 44,456 thousand and EUR 46,275 thousand, respectively.
Schedule of funds and pension plans of senior management	EUR thousand 30-06-2024 30-06-2023 Senior management (1) Pension funds: Endowments and / or contributions (2) 2,376 2,550 Pension funds: Accumulated rights (3) 59,672 55,451 1. Contributions made during the first six months to members of the senior manage ment who ceased in their functions by 30 June 2024, amounted to EUR 168 thousand (EUR 108 thousand by 30 June 2023). 2. Corresponds to the allocations and/or contributions made during the first six months of 2024 and 2023 as retirement pensions. 3. Corresponds to the rights accrued by members of senior management in the area of pensions. In addition, former members of senior management had at 30 June 2024 and 30 June 2023 rights accumulated for this same concept for EUR 83,485 thousand and EUR 90,401 thousand, respectively.

Financial assets (Tables)

Financial assets (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of financial assets [abstract]
Schedule of components of financial assets	The detail, by nature and category for measurement purposes, of Grupo Santander's financial assets, other than the balances relating to Cash, cash balances at central banks and other deposits on demand and Hedging derivatives, at 30 June 2024 and 31 December 2023 is as follows, presented by the nature and categories for valuation purposes: EUR million 30-06-2024 Financial Non-trading Financial Financial Financial Derivatives 58,928 Equity instruments 16,764 4,432 1,842 Debt instruments 71,523 684 3,174 71,160 114,347 Loans and advances 59,659 1,050 5,995 9,268 1,102,994 Central Banks 17,283 — — — 16,541 Credit institutions 22,477 — 444 335 56,290 Customers 19,899 1,050 5,551 8,933 1,030,163 Total 206,874 6,166 9,169 82,270 1,217,341 EUR million 31-12-2023 Financial Non-trading Financial Financial Financial Derivatives 56,328 Equity instruments 15,057 4,068 1,761 Debt instruments 62,124 860 3,095 73,565 103,559 Loans and advances 43,412 982 6,678 7,982 1,087,844 Central Banks 17,717 — — — 20,082 Credit institutions 14,061 — 459 313 57,917 Customers 11,634 982 6,219 7,669 1,009,845 Total 176,921 5,910 9,773 83,308 1,191,403
Disclosure of gross exposure by stages of impairment	Following is the gross exposure of financial assets subject to impairment stages at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Gross amount Gross amount Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Financial assets at fair value through other comprehensive income 79,697 651 281 80,629 81,183 305 192 81,680 Debt instruments 71,163 13 6 71,182 73,570 — 6 73,576 Loans and advances 8,534 638 275 9,447 7,613 305 186 8,104 Credit institutions 335 — — 335 313 — — 313 Customers 8,199 638 275 9,112 7,300 305 186 7,791 Financial assets at amortised cost 1,116,202 89,495 33,785 1,239,482 1,102,968 76,552 34,090 1,213,610 Debt instruments 113,462 501 698 114,661 103,127 203 455 103,785 Loans and advances 1,002,740 88,994 33,087 1,124,821 999,841 76,349 33,635 1,109,825 Central Banks 16,541 — — 16,541 20,082 — — 20,082 Credit institutions 56,294 — — 56,294 57,926 — — 57,926 Customers 929,905 88,994 33,087 1,051,986 921,833 76,349 33,635 1,031,817 Total 1,195,899 90,146 34,066 1,320,111 1,184,151 76,857 34,282 1,295,290 30-06-2024 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 17,665 20,089 18,003 3,234 1,237 60,228 Of which: impaired 119 177 217 167 265 945 31-12-2023 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 18,728 20,720 18,083 2,294 1,057 60,882 Of which: impaired 131 192 199 151 235 908 At the end 30 June 2024 and 31 December 2023 the concentration of this portfolio was as follows: Loans: gross amount Million euros 30-06-2024 31-12-2023 1. Without mortgage collateral 14 16 2. With mortgage collateral 2,511 2,417 2.1 Completed buildings 994 1,032 2.1.1 Residential 663 642 2.1.2 Other 331 390 2.2 Buildings and other constructions under construction 1,497 1,364 2.2.1 Residential 1,424 1,292 2.2.2 Other 73 72 2.3 Land 20 21 2.3.1 Developed consolidated land 13 14 2.3.2 Other land 7 7 Total 2,525 2,433
Disclosure of reconciliation of changes in loss allowance and in gross carrying amount for financial instruments	The following is the movement that has taken place, during the six-month periods ended 30 June 2024 and 2023, 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: EUR million 30-06-2024 30-06-2023 Balance as at beginning of period 22,950 22,888 Impairment losses charged to income for the period 7,112 6,843 Of which: Impairment losses charged to income 13,186 11,225 Impairment losses reversed with a credit to income (6,074) (4,382) Perimeter change — (37) Write-off of impaired balances against recorded impairment allowance (6,439) (6,831) Exchange differences and other (808) 492 Balance as at end of period 22,815 23,355 Of which, relating to: Impaired assets 14,429 14,271 Other assets 8,386 9,084 Of which: Individually calculated 2,964 2,858 Collectively calculated 19,851 20,497 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 30 June 2024 and 30 June 2023: EUR million 30-06-2024 Stage 1 Stage 2 Stage 3 Total Impairment allowance as at beginning of period 3,587 4,930 14,149 22,666 Transfers between stages (627) 609 3,941 3,923 Net changes of the exposure and modifications in the credit risk 530 (423) 2,962 3,069 Write-offs — — (6,439) (6,439) Exchange differences and other (186) (78) (509) (773) Carrying amount at end of period 3,304 5,038 14,104 22,446 EUR million 30-06-2023 Stage 1 Stage 2 Stage 3 Total Impairment allowance as at beginning of period 3,611 5,124 13,931 22,666 Transfers between stages (454) 355 3,767 3,668 Variation due to credit risk 605 (377) 2,891 3,119 Write-offs — — (6,801) (6,801) Exchange differences and other 88 97 249 434 Carrying amount at end of period 3,850 5,199 14,037 23,086 The movement during the six-month periods ended 30 June 2024 and 2023, in the balance of financial assets classified at amortised cost and considered impaired by reason for the credit risk is as follows: EUR million 30-06-2024 30-06-2023 Balance as at beginning of period 34,363 33,269 Net additions 6,747 6,480 Written-off assets (6,439) (6,831) Perimeter Changes 13 (45) Exchange differences and other (647) 773 Balance at end of period 34,037 33,646
Schedule of collaterals received for financial assets	Following is the breakdown of the value of the collaterals received to ensure the collection of the financial assets that comprise the heading of financial assets at amortized cost, distinguishing between real collaterals and other collaterals at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Real collaterals value 639,735 630,939 Of which: Impaired 12,920 12,894 Other collaterals value 94,442 96,164 Of which: Impaired 1,917 2,131 Total value of the collaterals received 734,177 727,103
Schedule of financial assets measured at other than fair value	Following is a comparison of the carrying amounts of Grupo Santander’s financial assets measured at other than fair value and their respective fair values at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Carrying amount Fair value Carrying amount Fair value Loans and advances 1,102,994 1,091,255 1,087,844 1,077,543 Debt instruments 114,347 112,141 103,559 102,888 ASSETS 1,217,341 1,203,396 1,191,403 1,180,431

Non-current assets held for s_2

Non-current assets held for sale (Tables)	6 Months Ended
	Jun. 30, 2024
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract]
Schedule of non-current assets classified as held for sale	The detail, by nature, of Grupo Santander’s non-current assets held for sale at 30 June 2024 and 31 December 2023 is as follows presented by nature: EUR million 30-06-2024 31-12-2023 Tangible assets 2,892 2,991 Of which: Foreclosed assets 2,668 2,773 Of which: Property assets in Spain 2,037 2,138 Other tangible assets held for sale 224 218 Other assets 23 23 2,915 3,014

Intangible assets (Tables)

Intangible assets (Tables)	6 Months Ended
	Jun. 30, 2024
Intangible assets and goodwill [abstract]
Schedule of goodwill based on cash-generating units	The detail of Intangible Assets - Goodwill at 30 June 2024 and 31 December 2023, based on the cash-generating units giving rise thereto, is as follows: EUR million 30-06-2024 31-12-2023 Banco Santander (Brazil) 3,321 3,679 SAM Investment Holdings Limited 1,444 1,444 Santander Consumer Germany 1,304 1,304 Santander Bank Polska 1,169 1,159 Santander Portugal 1,040 1,040 Santander US Auto 1,035 1,003 Santander España 998 998 Santander Holding USA (ex. Auto) 839 814 Santander UK 627 612 Grupo Financiero Santander (Mexico) 500 523 Banco Santander - Chile 492 516 Ebury Partners 333 350 Santander Consumer Nordics 216 206 Other entities 350 369 Total Goodwill 13,668 14,017

Financial liabilities (Tables)

Financial liabilities (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of financial liabilities [abstract]
Schedule of components of financial liabilities other than hedging derivatives	The following is a breakdown of Grupo Santander's financial liabilities, other than the balances corresponding to the Derivatives - hedge accounting heading, as of 30 June 2024 and 31 December 2023, presented by nature and categories for valuation purposes: EUR million 30-06-2024 31-12-2023 Financial Financial Financial Financial Financial Financial Derivatives 52,261 50,589 Short Positions 29,653 26,174 Deposits 51,942 27,751 1,106,860 45,507 34,996 1,125,308 Central banks 11,057 1,605 34,097 7,808 1,209 48,782 Credit institutions 17,156 1,337 83,655 17,862 1,735 81,246 Customer 23,729 24,809 989,108 19,837 32,052 995,280 Debt instruments — 6,726 305,136 — 5,371 303,208 Other financial liabilities — 16 42,900 — — 40,187 Total 133,856 34,493 1,454,896 122,270 40,367 1,468,703
Disclosure of composition and reconciliation of debt instruments	The detail of the balance of debt instruments issued according to their nature is: EUR million 30-06-2024 31-12-2023 Bonds and debentures outstanding 239,696 231,880 Subordinated 32,111 30,529 Promissory notes and other securities 40,055 46,170 Total debt instruments issued 311,862 308,579 The detail, at 30 June 2024 and 2023, of the outstanding balance of the debt instruments, excluding promissory notes, which at these dates had been issued by Banco Santander 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 2024 and 2023: EUR million 30-06-2024 Opening Perimeter Issuances or placements Repurchases or Exchange Closing Bonds and debentures outstanding 231,880 (1,224) 41,185 (32,172) 27 239,696 Subordinated 30,529 — 3,908 (2,422) 96 32,111 Bonds and debentures outstanding and subordinated liabilities issued 262,409 (1,224) 45,093 (34,594) 123 271,807 EUR million 30-06-2023 Opening Perimeter Issuances or placements Repurchases or Exchange Closing Bonds and debentures outstanding 211,597 (1,467) 34,438 (28,534) 1,701 217,735 Subordinated 25,717 — 1,500 (36) (317) 26,864 Bonds and debentures outstanding and subordinated liabilities issued 237,314 (1,467) 35,938 (28,570) 1,384 244,599
Schedule of financial liabilities measured at other than fair value	Following is a comparison between the value by which Grupo Santander’s financial liabilities are recorded that are measured using criteria other than fair value and their corresponding fair value at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Carrying amount Fair value Carrying amount Fair value Deposits 1,106,860 1,105,646 1,125,308 1,124,373 Debt instruments 305,136 301,813 303,208 298,792 Liabilities 1,411,996 1,407,459 1,428,516 1,423,165

Provisions (Tables)

Provisions (Tables)	6 Months Ended
	Jun. 30, 2024
Provisions [abstract]
Schedule of other provisions by type of provision	Set forth below is the detail, by type of provision, of the balances at 30 June 2024 and at 31 December 2023 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: EUR million 30-06-2024 31-12-2023 Provisions for taxes 714 745 Provisions for employment-related proceedings (Brazil) 612 611 Provisions for other legal proceedings 1,305 1,359 Provision for customer remediation 535 454 Provision for restructuring 663 596 Other 1,044 869 4,873 4,634

Equity (Tables)

Equity (Tables)	6 Months Ended
	Jun. 30, 2024
Equity [abstract]
Schedule of other comprehensive income components	Breakdown of other comprehensive income - Items not reclassified to profit or loss and Items that may be reclassified to profit or loss EUR million 30-06-2024 31-12-2023 Other comprehensive income accumulated (36,963) (35,020) Items not reclassified to profit or loss (5,118) (5,212) Actuarial gains or losses on defined benefit pension plans (4,234) (4,324) Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (3) 1 Other valuation adjustments — — Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (705) (776) Inefficacy of fair value hedges of equity instruments measured at fair value with changes — — Changes in the fair value of equity instruments measured at fair value with changes 268 264 Changes in the fair value of equity instruments measured at fair value with changes (268) (264) Changes in the fair value of financial liabilities measured at fair value through profit or loss (176) (113) Items that may be reclassified to profit or loss (31,845) (29,808) Hedge of net investments in foreign operations (effective portion) (8,583) (8,684) Exchange differences (21,187) (19,510) Hedging derivatives (effective portion) (966) (740) Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income (733) (555) Hedging instruments (items not designated) — — Non-current assets held for sale — — Share in other income and expenses recognised in investments, joint ventures and associates (376) (319)
Schedule of changes in fair value of equity instruments that will not be reclassified	Below is a breakdown of the composition of the balance as of 30 June 2024 and 31 December 2023 under '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' depending on the geographical origin of the issuer: EUR million 30-06-2024 31-12-2023 Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Equity instruments Domestic Spain 33 (1,325) (1,292) 106 32 (1,173) (1,141) 252 International Rest of Europe 123 (71) 52 284 117 (71) 46 267 United States 17 — 17 19 16 — 16 19 Latin America and rest 519 (1) 518 1,433 370 (67) 303 1,223 692 (1,397) (705) 1,842 535 (1,311) (776) 1,761 Of which: Listed 472 (49) 423 1,462 316 (118) 198 1,225 Unlisted 220 (1,348) (1,128) 380 219 (1,193) (974) 536
Schedule of other comprehensive income, that may be reclassified to profit or loss, by type of instrument and geographical origin of the issuer	Below is a breakdown of the composition of the balance as of 30 June 2024 and 31 December 2023 under Other comprehensive income - Items that may 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: EUR million 30-06-2024 31-12-2023 Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Revaluation gains Revaluation losses Net revaluation gains/(losses) Fair value Debt instruments Issued by public Public-sector Spain 102 (1) 101 10,136 17 0 17 9,867 Rest of Europe 257 (82) 175 14,850 333 (96) 237 18,258 Latin America and rest of the world 69 (873) (804) 37,838 194 (820) (626) 38,169 Issued by Private-sector Spain 73 (13) 60 6,366 98 (9) 89 5,129 Rest of Europe 21 (30) (9) 5,776 19 (30) (11) 5,018 Latin America and rest of the world 12 (268) (256) 5,462 6 (267) (261) 5,106 534 (1,267) (733) 80,428 667 (1,222) (555) 81,547

Segment information (Primary _2

Segment information (Primary segment) (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of operating segments [abstract]
Disclosure of reconciliation between adjusted profit and statutory profit	Following is the reconciliation between the adjusted profit and the statutory profit corresponding to the six-month periods ended 30 June 2024 and 2023: EUR million Gross Margin Profit before taxes Profit Segment 30-06-2024 30-06-2023 30-06-2024 30-06-2023 30-06-2024 30-06-2023 Retail & Commercial Banking 16,274 14,392 5,187 3,638 3,326 2,421 Digital Consumer Bank 6,449 6,026 1,341 1,504 1,070 1,027 Corporate & Investment Banking 4,188 3,956 2,151 2,305 1,405 1,478 Wealth Management & Insurance 1,789 1,589 1,130 985 818 711 Payments 2,701 2,613 306 498 49 223 Corporate Center (350) (342) (606) (601) (609) (620) Underlying Profit 31,050 28,234 9,508 8,329 6,059 5,241 Adjustments (335) (224) — (239) — — Statutory Profit 30,715 28,010 9,508 8,090 6,059 5,241

Related parties (Tables)

Related parties (Tables)	6 Months Ended
	Jun. 30, 2024
Disclosure of transactions between related parties [abstract]
Schedule of related party transactions	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: EUR million 30-06-2024 Expenses and income Significant shareholders Directors and executives Group companies or entities Other related parties Total Expenses Finance costs — — 75 2 77 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 97 — 97 — — 172 2 174 Income Finance income — — 249 4 253 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 798 1 799 — — 1,047 5 1,052 EUR million 30-06-2024 Other transactions Significant shareholders Directors and executives Group companies or entities Other related parties Total Financing agreements: loans and capital contributions (lender) — — 363 50 413 Financing agreements: loans and capital contributions (borrower) — (2) 545 84 627 Guarantees provided — — 8 (291) (283) Guarantees received — — — — — Commitments acquired — — 44 2 46 Dividends and other distributed profit — 2 — 17 19 Other transactions — — (127) — (127) EUR million 30-06-2024 Balance closing period Significant shareholders Directors and executives Group companies or entities Other related parties Total Debt balances: Customers and commercial debtors — — — — — Loans and credits granted — 10 10,043 234 10,287 Other collection rights — — 704 — 704 — 10 10,747 234 10,991 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 16 2,735 234 2,985 Other payment obligations — — 304 — 304 — 16 3,039 234 3,289 EUR million 30-06-2023 Expenses and income Significant shareholders Directors and executives Group companies or entities Other related parties Total Expenses Finance costs — — 79 — 79 Leases — — — — — Services received — — — — — Purchases of stocks — — — — — Other expenses — — 57 — 57 — — 136 — 136 Income Finance income — — 188 3 191 Dividends received — — — — — Services rendered — — — — — Sale of stocks — — — — — Other income — — 709 1 710 — — 897 4 901 EUR million 30-06-2023 Other transactions Significant shareholders Directors and executives Group companies or entities Other related parties Total Financing agreements: loans and capital contributions (lender) — 2 376 (199) 179 Financing agreements: loans and capital contributions (borrower) — — (29) 7 (22) Guarantees provided — — — 680 680 Guarantees received — — — — — Commitments acquired — — 51 3 54 Dividends and other distributed profit — 1 — 10 11 Other transactions — — 36 — 36 EUR million 31-12-2023 Balance closing period Significant shareholders Directors and executives Group companies or entities Other related parties Total Debt balances: — — — — — Loans and credits granted — 12 9,680 185 9,877 Other collection rights — — 817 1 818 — 12 10,497 186 10,695 Credit balances: Suppliers and creditors granted — — — — — Loans and credits received — 19 2,190 150 2,359 Other payment obligations — — 290 — 290 — 19 2,480 150 2,649

Off-balance-sheet exposures (Ta

Off-balance-sheet exposures (Tables)	6 Months Ended
	Jun. 30, 2024
Off-Balance-Sheet Exposures
Schedule of contingent commitments	EUR million 30-06-2024 31-12-2023 Loan commitments granted 290,151 279,589 Of which impaired 488 406 Financial guarantees granted 15,598 15,435 Of which impaired 497 578 Bank sureties 15,561 15,400 Credit derivatives sold 37 35 Other commitments granted 127,420 113,273 Of which impaired 486 542 Other granted guarantees 57,519 57,363 Other 69,901 55,910

Average headcount and number _2

Average headcount and number of branches (Tables)	6 Months Ended
	Jun. 30, 2024
Average Headcount And Number Of Branches
Schedule of average number of employees	The average number of employees at Banco Santander and Grupo Santander, by gender, in the six-month periods ended 30 June 2024 and 2023 is as follows: Average headcount Bank Group 30-06-2024 30-06-2023 30-06-2024 30-06-2023 Men 12,246 12,260 99,865 97,353 Women 11,734 11,732 111,011 112,663 23,980 23,992 210,876 210,016
Schedule of number of branches	The number of branches at 30 June 2024 and 31 December 2023 is as follow: Number of branches Group 30-06-2024 31-12-2023 Spain 1,883 1,924 Group 6,402 6,594 8,285 8,518

Other disclosures (Tables)

Other disclosures (Tables)	6 Months Ended
	Jun. 30, 2024
Other Disclosures
Summary of fair values of financial assets and liabilities	The following table shows a summary of the fair values, at 30 June 2024 and 31 December 2023, of the financial assets and liabilities indicated below, classified on the basis of the various measurement methods used by Grupo Santander to determine their fair value: EUR million 30-06-2024 31-12-2023 Published price quotations in active markets (Level 1) Internal models (Levels 2 and 3) Total Published price quotations in active markets (Level 1) Internal models (Levels 2 and 3) Total Financial assets held for trading 77,854 129,020 206,874 67,842 109,079 176,921 Non-trading financial assets mandatorily at fair value through profit or loss 2,014 4,152 6,166 1,765 4,145 5,910 Financial assets at fair value through profit and loss 2,494 6,675 9,169 2,746 7,027 9,773 Financial assets at fair value through other comprehensive income 63,114 19,156 82,270 64,631 18,677 83,308 Hedging derivatives (assets) — 5,413 5,413 — 5,297 5,297 Financial liabilities held for trading 24,028 109,828 133,856 20,298 101,972 122,270 Financial liabilities designated at fair value through profit or loss — 34,493 34,493 25 40,342 40,367 Hedging derivatives (liabilities) — 5,535 5,535 — 7,656 7,656 Liabilities under insurance contracts — 17,592 17,592 — 17,799 17,799
Schedule of financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3)	Set forth below are the financial instruments at fair value whose measurement was based on internal models (levels 2 and 3) at 30 June 2024 and 31 December 2023: EUR million EUR million Fair values calculated using internal models at 30-06-2024 (*) Fair values calculated using internal models at 31-12-2023 (*) Level 2 Level 3 Level 2 Level 3 Valuation techniques Main inputs ASSETS 153,221 11,195 133,874 10,351 Financial assets held for trading 126,977 2,043 106,993 2,086 Central banks (**) 17,283 — 17,717 — Present value method Yield curves, FX market prices Credit institutions (**) 22,477 — 14,061 — Present value method Yield curves, FX market prices Customers (**) 19,265 307 11,418 24 Present value method Yield curves, FX market prices Debt instruments and equity instruments 10,329 535 8,683 915 Present value method Yield curves, FX market prices Derivatives 57,623 1,201 55,114 1,147 Swaps 45,459 799 44,987 577 Present value method, Gaussian Copula Yield curves, FX market prices, HPI, Basis, Liquidity Exchange rate options 734 8 836 9 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 2,029 30 2,210 153 Black's Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate futures 2,890 — 33 — Present value method Yield curves, FX market prices Index and securities options 252 196 126 235 Black’s Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Liquidity Other 6,259 168 6,922 173 Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX and EQ market prices, Dividends, Liquidity, Dividends, Correlation, HPI, Credit, Others Hedging derivatives 5,413 — 5,297 — Swaps 4,433 — 4,665 — Present value method Yield curves, FX market prices, Basis Interest rate options — — 2 — Black Model Yield curves, FX market prices, Volatility surfaces Other 980 — 630 — Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity, Others Non-trading financial assets mandatorily at fair value through profit or loss 2,057 2,095 2,050 2,095 Equity instruments 708 1,719 815 1,495 Present value method Yield curves, Market price, Dividends and Others Debt instruments 431 244 539 313 Present value method Yield curves Loans and receivables 918 132 696 287 Present value method, swap asset model and CDS Yield curves and Credit curves Financial assets designated at fair value through profit or loss 5,966 709 6,846 181 Credit institutions 444 — 459 — Present value method Yield curves, FX market prices Customers (***) 5,327 224 6,189 31 Present value method Yield curves, FX market prices, HPI Debt instruments 195 485 198 150 Present value method Yield curves, FX market prices Financial assets at fair value through other comprehensive income 12,808 6,348 12,688 5,989 Equity instruments 4 355 5 492 Present value method Yield curves,Market price, Dividends and Others Debt instruments 8,852 677 9,638 559 Present value method Yield curves, FX market prices Loans and receivables 3,952 5,316 3,045 4,938 Present value method Yield curves, FX market prices and Credit curves LIABILITIES 166,015 1,433 166,542 1,227 Financial liabilities held for trading 109,026 802 101,103 869 Central banks (**) 11,056 — 7,808 — Present value method FX market prices, Yield curves Credit institutions (**) 17,156 — 17,862 — Present value method FX market prices, Yield curves Customers 23,729 — 19,837 — Present value method FX market prices, Yield curves Derivatives 51,073 802 49,380 869 Swaps 41,175 304 39,395 388 Present value method, Gaussian Copula Yield curves, FX market prices, Basis, Liquidity, HPI Exchange rate options 589 — 549 8 Black Model, multifactorial advanced models interest rate Yield curves, Volatility surfaces, FX market prices, Liquidity Interest rate options 2,388 65 2,207 139 Black-Scholes Model Yield curves, Volatility surfaces, FX market prices Index and securities options 920 222 466 187 Black-Scholes Model Yield curves, FX market prices, Liquidity Interest rate and equity futures 36 — 101 — Present value method Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, Liquidity, HPI Other 5,965 211 6,662 147 Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX & EQ market prices, Dividends, Correlation, HPI, Credit, Others Short positions 6,012 — 6,216 — Present value method Yield curves ,FX market prices, Equity Hedging derivatives 5,530 5 7,650 6 Swaps 5,038 4 6,866 6 Present value method Yield curves ,FX market prices, Basis Interest rate options 1 1 1 — Black's Model Yield curves, Volatility surfaces, FX market prices and Liquidity Other 491 — 783 — Present value method, Advanced stochastic volatility models and others Yield curves, Volatility surfaces, FX market prices, Credit, Liquidity and others Financial liabilities designated at fair value through profit or loss 34,141 352 40,313 29 Present value method Yield curves, FX market prices Liabilities under insurance contracts 17,318 274 17,476 323 Present Value Method with actuarial techniques Mortality tables and yield curves (*) The internal models of level 2 implement figures based on the parameters observed in the market, while level 3 internal models use significant inputs that are not observable in market data. (**) Includes mainly short-term loans/deposits and repurchase/reverse repurchase agreements with corporate customers (mainly brokerage and investment companies). (***) Includes mainly structured loans to corporate clients.
Schedule of effect on fair value of financial instruments classified as Level 3 of a reasonable change in the assumptions used in the valuation	The table below shows the effect, at 30 June 2024 and 31 December 2023, 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: 30/06/2024 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Financial assets held for trading Loans and advances to customers Repos/Reverse repos Others Long-term repo spread n.a. n.a. (0.07) 0.00 Debt securities Corporate debt Discounted Cash Flows Credit spread 0% - 10% 5.07% (4.88) 5.03 Government debt Discounted Cash Flows Discount curve 0% - 8% 3.99% (6.86) 6.82 Others Discounted Cash Flows Credit spread 10% - 90% 33.53% (0.45) 0.18 Derivatives Cap&Floor Forward estimation Interest rate (2)bp - 2bp 0.02bp (0.02) 0.02 EQ Options EQ option pricing model Volatility 0% - 70% 42.49% (0.41) 0.63 EQ Options Local volatility Volatility 10% - 90% 50.00% (6.22) 6.22 Fx Options Fx option pricing model Volatility 0% - 40% 20.81% (0.53) 0.57 Inflation Derivatives Asset Swap model Inflation Swap Rate 2% - 8% 4.35% (0.32) 0.20 IR Options IR option pricing model Volatility 0% - 30% 17.56% (0.20) 0.28 IRS Others Others 5% - n.a. n.a. (2.30) 0.00 IRS Discounted Cash Flows Credit spread 70.9% - 322.7% 209.79% (1.71) 2.11 IRS Discounted Cash Flows Swap rate 9% - 10% 9.57% (0.69) 0.92 IRS Forward estimation Interest rate 60bps - 300bps 181.5bps (2.87) 2.94 IRS Prepayment modelling Prepayment rate 2.5% - 9.0% 9.00% 0.00 0.03 Property derivatives Option pricing model Growth rate (6)% - 5% 0.00% (3.78) 3.78 Securitisation Swap Discounted Cash Flows Constant prepayment rates (25.2)% - 30.8% 2.80% (5.59) 5.59 Structured notes Price based Price (10)% - 10% 0.00% (1.53) 1.53 Financial assets designated at fair value through profit or loss Loans and advances to customers Loans Discounted Cash Flows Credit spreads 0.1% - 2% 1.05% (0.19) 0.19 Mortgage portfolio Black Scholes model Growth rate (5)% - 5% 0.00% (0.24) 0.24 Debt securities Other debt securities Others Inflation Swap Rate 0% - 8% 3.89% (4.11) 3.90 30/06/2024 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Non-trading financial assets mandatorily at fair value through profit or loss Debt securities Property securities Probability weighting Growth rate (5)% - 5% 0.00% (0.35) 0.35 Equity instruments Equities Price Based Price 90% - 110% 100% (171.92) 171.92 Financial assets at fair value through other comprehensive income Loans and advances to customers Loans Discounted Cash Flows Credit spread 10% - 90% 10.00% (19.50) 0.00 Loans Discounted Cash Flows Interest rate curve 4.5% - 8.1% 6.28% (0.57) 0.57 Loans Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (20.30) 20.30 Loans Forward estimation Credit spread 167.7bps - 365.8bps 167.74bps (0.20) 0.00 Loans Market price Market price (10)% - 20% 0.00% (2.78) 1.39 Debt securities Corporate debt Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (0.09) 0.09 Government debt Discounted Cash Flows Interest rate 0.4% - 2.4% 1.42% 0.00 0.00 Mortgage Letters Discounted Cash Flows Mortgage Letters 5.9% - 6.2% 6.08% 0.13 0.13 Equity instruments Equities Price Based Price 90% - 110% 100.00% (35.46) 35.46 Financial liabilities held for trading Derivatives Cap&Floor Volatility option model Volatility 10% - 90% 50.62% (0.04) 0.04 FX Options Volatility option model Volatility 10% - 90% 36.10% (0.44) 0.21 IRS Discounted Cash Flows Inflation Swap Rate 10% - 99% 50.54% (4.17) 4.26 Swaptions Volatility option model Volatility 60bps - 114bps 70.47bps (5.77) 1.39 31/12/2023 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Financial assets held for trading Loans and advances to customers Repos/Reverse repos Other Long-term repo spread n.a. n.a. (0.08) — Debt securities Corporate debt Discounted Cash Flows Credit spread 0% - 10% 5.01% (1.90) 1.90 Government debt Discounted Cash Flows Discount curve 0% - 8% 3.99% (7.77) 7.72 Derivatives CCS Forward estimation Interest rate (6)bps - 6bps 0.40bps (0.90) 1.03 CDS Credit default models Illiquid credit default spread curves 100bps - 200bps 149.14bps (0.14) 0.14 EQ Options EQ option pricing model Volatility 0% - 70% 44.39% (0.51) 0.89 EQ Options Local volatility Volatility 10% - 90% 50.00% (1.26) 1.26 Fx Options Fx option pricing model Volatility 0% - 40% 20.81% (0.55) 0.59 Inflation Derivatives Asset Swap model Inflation Swap Rate 2% - 8% 4.18% (0.28) 0.16 IR Options IR option pricing model Volatility 0.4% - 32.2% 18.86% (0.29) 0.41 IRS Others Others 5% - n.a n.a (1.25) — IRS Discounted Cash Flows Credit spread 2.6% - 8.3% 5.60% (1.97) 2.18 IRS Discounted Cash Flows Swap rate 9.4% - 9.8% 9.60% (1.01) 0.95 IRS Forward estimation Interest rate (5.2)bps - 5.2bps 0.09bps (0.03) 0.03 IRS Prepayment modelling Prepayment rate 2.5% - 6.2% 4.17% (0.06) 0.05 Property derivatives Option pricing model Growth rate (5)% - 5% 0.00% (3.92) 3.92 Securitisation Swap Discounted Cash Flows Constant prepayment rates (22.30)% - 27.20% 2.47% (4.95) 4.95 Structured notes Price based Price (10)% - 10% 0.00% (1.53) 1.53 Financial assets designated at fair value through profit or loss Loans and advances to customers Loans Discounted Cash Flows Credit spreads 0.1% - 3% 1.55% (0.21) 0.21 Mortgage portfolio Black Scholes model Growth rate (5)% - 5% 0.00% (0.23) 0.23 Debt securities Other debt securities Others Inflation Swap Rate 0% - 8% 3.89% (4.48) 4.25 31/12/2023 Portfolio/Instrument Valuation technique Main unobservable inputs Range Weighted average Impacts (EUR million) (Level 3) Unfavourable scenario Favourable scenario Non-trading financial assets mandatorily at fair value through profit or loss Debt securities Property securities Probability weighting Growth rate (5)% - 5% 0.00% (0.35) 0.35 Equity instruments Equities Price Based Price 90% - 110% 100.00% (149.49) 149.49 Financial assets at fair value through other comprehensive income Loans and advances to customers Loans Discounted Cash Flows Credit spread n.a. n.a (20.80) 0.00 Loans Discounted Cash Flows Interest rate curve 4.6% - 9.0% 6.80% (0.68) 0.68 Loans Discounted Cash Flows Margin of a reference portfolio (1)bp - 1bp 0bp (20.30) 20.30 Loans Forward estimation Credit spread 167.7bps - 365.8bps 167.74bps (3.46) 0.00 Loans Market price Market price (10)% - 20% 0.00% (5.02) 2.51 Debt securities Corporate debt Discounted Cash Flows Margin of a reference portfolio (1)% - 1% 0.00% (0.09) 0.09 Government debt Discounted Cash Flows Interest rate 0% - 2% 0.99% 0.00 0.00 Equity instruments Equities Price Based Price 90% - 110% 100.00% (49.24) 49.24 Financial liabilities held for trading Derivatives Cap&Floor Volatility option model Volatility 10% - 90% 39.03% (0.45) 0.25 CMS Discounted Cash Flows Volatility 10% - 90% 47.66% 0.00 0.00 Fx Options Volatility option model Volatility 10% - 90% 28.09% (0.45) 0.13 IRS Discounted Cash Flows Inflation Swap Rate 10% - 90% 39.03% (0.45) 0.25 Swaptions Volatility option model Volatility 10% - 90% 35.55% 0.21 0.10 1. For each instrument, the valuation technique is shown, the unobservable inputs described in the "Main unobservable inputs" column under probable scenarios, variation range, average value and impact resulting from valuing the position in the established maximum and minimum range. 2. The breakdown of impacts is shown by type of instrument and unobservable inputs. 3. The estimation of the range of variation of the unobservable inputs has been carried out taking into account plausible movements of said parameters depending on the type of instrument. 4. Zero impacts from fully hedged or back-to-back transactions have not been included in this exercise.
Schedule of changes in financial instruments classified as Level 3	Lastly, the changes in the financial instruments classified as level 3 in the first six months of 2024 and 2023 were as follows: 01-01-2024 Changes 30-06-2024 EUR million Fair value calculated using internal models (Level 3) Purchases/Settlements Sales/Amortisation Changes in fair value recognized in profit or loss Changes in fair value recognised in equity Level reclassifications Other Fair value calculated using internal models (Level 3) Financial assets held for trading 2,086 726 (194) 33 — (566) (42) 2,043 Customers 24 275 (24) 2 — 30 — 307 Debt instruments 914 84 (2) (18) — (428) (16) 534 Equity instruments 1 — — — — — — 1 Trading derivatives 1,147 367 (168) 49 — (168) (26) 1,201 Swaps 577 281 (94) (3) — 38 — 799 Exchange rate options 9 — (1) 3 — (2) (1) 8 Interest rate options 153 — — (16) — (107) — 30 Index and securities options 235 11 (47) 79 — (66) (16) 196 Other 173 75 (26) (14) — (31) (9) 168 Financial assets designated at fair value through profit or loss 181 593 (126) 28 — 61 (28) 709 Loans and advances to customers 31 188 (3) (8) — — 16 224 Debt instruments 150 405 (123) 36 — 61 (44) 485 Non-trading financial assets mandatorily at fair value through profit or loss 2,095 167 (189) 71 — (69) 20 2,095 Loans and advances to customers 287 43 (97) 45 — (140) (6) 132 Debt instruments 313 5 (73) 2 — — (3) 244 Equity instruments 1,495 119 (19) 24 — 71 29 1,719 Financial assets at fair value through other comprehensive income 5,989 3,034 (2,522) — (123) 23 (53) 6,348 Loans and advances to customers 4,938 2,845 (2,505) — 20 16 2 5,316 Debt instruments 559 186 (2) — (17) 7 (56) 677 Equity instruments 492 3 (15) — (126) — 1 355 TOTAL ASSETS 10,351 4,520 (3,031) 132 (123) (551) (103) 11,195 Financial liabilities held for trading 869 293 (135) (46) — (166) (13) 802 Trading derivatives 869 293 (135) (46) — (166) (13) 802 Swaps 388 84 (23) (52) — (93) — 304 Exchange rate options 8 — (1) (4) — (2) (1) — Interest rate options 139 1 (19) 7 — (64) 1 65 Index and securities options 187 1 (17) 71 — (7) (13) 222 Others 147 207 (75) (68) — — — 211 Hedging derivatives (Liabilities) 6 — — (1) — — — 5 Swaps 6 — — (2) — — — 4 Interest rate options — — — 1 — — — 1 Financial liabilities designated at fair value through profit or loss 29 264 (8) 38 — 29 — 352 Liabilities under insurance contracts 323 — — (19) — — (30) 274 TOTAL LIABILITIES 1,227 557 (143) (28) — (137) (43) 1,433 01-01-2023 Changes 30-06-2023 EUR million Fair value calculated using internal models (Level 3) Purchases/Settlements Sales/Amortisation Changes in fair value recognized in profit or loss Changes in fair value recognised in equity Level reclassifications Other Fair value calculated using internal models (Level 3) Financial assets held for trading 383 198 (72) 77 — 303 151 1,040 Debt instruments 42 52 (4) 1 — 316 6 413 Equity instruments 1 — — — — — — 1 Trading derivatives 340 146 (68) 77 — (13) (1) 481 Swaps 139 — (3) 93 — — (12) 217 Exchange rate options 4 — — (1) — — — 3 Interest rate options 39 — — (10) — — — 29 Index and securities options 48 52 — 3 — (23) 5 85 Other 110 94 (65) (8) — 10 6 147 Financial assets designated at fair value through profit or loss 427 — — (40) — — 30 417 Loans and advances to customers 5 — — — — — — 5 Debt instruments 422 — — (40) — — 30 412 Non-trading financial assets mandatorily at fair value through profit or loss 1,833 163 (116) 48 — — (16) 1,912 Loans and advances to customers 239 59 (63) (16) — — 9 228 Debt instruments 325 32 (25) 3 — — 2 337 Equity instruments 1,269 72 (28) 61 — — (27) 1,347 Financial assets at fair value through other comprehensive income 5,647 4,197 (3,595) — (222) 505 86 6,618 Loans and advances to customers 4,718 4,196 (3,590) — 23 473 39 5,859 Debt instruments 229 — (3) — (1) 32 6 263 Equity instruments 700 1 (2) — (244) — 41 496 TOTAL ASSETS 8,290 4,558 (3,783) 85 (222) 809 251 9,988 Financial liabilities held for trading 415 304 (101) (91) — (118) (7) 402 Trading derivatives 415 304 (101) (91) — (118) (7) 402 Swaps 235 104 (70) (25) — (97) (14) 133 Exchange rate options — 24 (24) — — — — — Interest rate options 19 7 (1) (3) — — — 22 Index and securities options 42 38 (6) 3 — (21) 7 63 Others 119 131 — (66) — — — 184 Hedging derivatives (Liabilities) 14 — — 3 — 36 — 53 Swaps 14 — — 3 — 36 — 53 Financial liabilities designated at fair value through profit or loss 151 — (5) 1 — — (147) — Liabilities under insurance contracts 345 — — (6) — — 26 365 TOTAL LIABILITIES 925 304 (106) (93) — (82) (128) 820
Disclosure of quantitative data about entity's exposure to risk	30-06-2024 Total Of which: impaired Without collateral With collateral Without collateral With collateral Maximum amount of the actual collateral that can be considered Maximum amount of the actual collateral that can be considered Amounts in million euros, except number of transactions in units Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Credit entities — — — — — — — — — — — — — — Public sector 13,541 417 49 7 2 — 4 8 3 7 1 1 — 3 Other financial institutions and: individual shareholder 940 83 679 233 83 106 53 438 22 340 61 21 10 43 Non financial institutions and individual shareholder 594,786 6,496 53,944 6,716 3,883 1,555 3,134 312,108 2,922 33,165 3,302 1,863 659 2,712 Of which: Financing for constructions and property development 13,477 93 1,933 552 460 38 128 7,480 52 1,054 216 157 23 101 Other warehouses 3,803,716 5,369 481,815 10,090 4,576 3,782 4,195 1,735,175 2,321 291,622 5,343 1,705 2,382 3,273 Total 4,412,983 12,365 536,487 17,046 8,544 5,443 7,386 2,047,729 5,268 325,134 8,707 3,590 3,051 6,031 Financing classified as non-current assets and disposable groups of items that have been classified as held for sale — — — — — — — — — — — — — — 31-12-2023 Total Of which: impaired Without collateral With collateral Without collateral With collateral Maximum amount of the actual collateral that can be considered Maximum amount of the actual collateral that can be considered Amounts in million euros, except number of transactions in units Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Number of transactions Gross amount Number of operations Gross amount Mortgage collateral Other collateral Impairment of accumulated value or accumulated losses in fair value due to credit risk Credit entities — — — — — — — — — — — — — — Public sector 12,851 437 37 5 2 — 4 7 3 7 1 1 — 3 Other financial institutions and: individual shareholder 1,011 258 833 285 38 182 58 472 25 428 107 21 51 50 Non financial institutions and individual shareholder 728,123 7,709 61,110 6,977 4,079 1,461 3,543 385,859 3,307 37,225 3,751 2,134 709 3,078 Of which: Financing for constructions and property development 14,236 106 2,035 506 415 41 134 7,759 56 1,155 235 183 18 112 Other warehouses 4,400,346 6,107 507,378 10,185 4,602 4,043 4,484 2,092,099 2,593 293,433 5,257 1,744 2,394 3,415 Total 5,142,331 14,511 569,358 17,452 8,721 5,686 8,089 2,478,437 5,928 331,093 9,116 3,900 3,154 6,546 Financing classified as non-current assets and disposable groups of items that have been classified as held for sale — — — — — — — — — — — — — — Home purchase loans granted to families in Spain on 30 June 2024 amounted to EUR 60,431 million (EUR 61,097 million at 31 December 2023). Of which mortgage collateral are 99.66%: Million euros 30-06-2024 31-12-2023 Gross Amount Of which: impaired Gross Amount Of which: impaired Home purchase loans to families 60,431 959 61,097 924 -Without mortgage collateral 203 14 215 16 - With mortgage collateral 60,228 945 60,882 908 At 30 June 2024 and 31 December 2023 the financing amount related to construction and real estate business in Spain amounted to EUR 2,491 million and EUR 2,393 million net of allowances, respectively. 30-06-2024 Million euros Gross amount Excess of gross exposure over maximum recoverable amount of effective collateral Specific allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 2,525 278 34 Of which: watchlist/ impaired 54 5 25 Memorandum items: Written-off assets 345 31-12-2023 Million euros Gross amount Excess of gross exposure over maximum recoverable amount of effective collateral Specific allowance Financing for construction and property development recognised by the Group's credit institutions (including land) (business in Spain) 2,433 259 40 Of which: watchlist/ impaired 74 5 29 Memorandum items: Written-off assets 346 30-06-2024 31-12-2023 Million euros Carrying amount Memorandum items: Total loans and advances to customers excluding the public sector (business in Spain) (book value) 244,349 241,695 Total consolidated assets (Total business) (book value) 1,786,261 1,797,062 Impairment losses and provision for exposure classified as normal (business in Spain) 1,162 1,230 The following table shows the breakdown at 30 June 2024 and 31 December 2023 of the foreclosed assets for the Spanish business: 30-06-2024 Million euros Gross carrying amount Valuation Adjustments Of which: Impairment losses since time of the foreclosure Carrying amount Property assets arising from financing provided to construction and property development companies 4,634 2,630 1,935 2,004 Of which: Completed Buildings 817 484 406 333 Residential 195 100 80 95 Other 622 384 326 238 Buildings under construction 126 58 45 68 Residential 9 7 5 2 Other 117 51 40 66 Land 3,691 2,088 1,484 1,603 Developed Land 1,001 530 333 471 Other land 2,690 1,558 1,151 1,132 Property assets from home purchase mortgage loans to households 435 193 131 242 Other foreclosed property assets 114 54 42 60 Total property assets 5,183 2,877 2,108 2,306 31-12-2023 Million euros Gross carrying amount Valuation Adjustments Of which: Impairment losses since time of the foreclosure Carrying amount Property assets arising from financing provided to construction and property development companies 4,901 2,801 2,072 2,100 Of which: Completed Buildings 1,054 615 519 439 Residential 224 111 89 113 Other 830 504 430 326 Buildings under construction 101 45 36 56 Residential 12 9 6 3 Other 89 36 30 53 Land 3,746 2,141 1,517 1,605 Developed Land 1,107 589 366 518 Other land 2,639 1,552 1,151 1,087 Property assets from home purchase mortgage loans to households 473 197 131 276 Other foreclosed property assets 132 60 46 72 Total property assets 5,506 3,058 2,249 2,448
Disclosure of nature and extent of risks arising from financial instruments	Following is the gross exposure of financial assets subject to impairment stages at 30 June 2024 and 31 December 2023: EUR million 30-06-2024 31-12-2023 Gross amount Gross amount Stage 1 Stage 2 Stage 3 Total Stage 1 Stage 2 Stage 3 Total Financial assets at fair value through other comprehensive income 79,697 651 281 80,629 81,183 305 192 81,680 Debt instruments 71,163 13 6 71,182 73,570 — 6 73,576 Loans and advances 8,534 638 275 9,447 7,613 305 186 8,104 Credit institutions 335 — — 335 313 — — 313 Customers 8,199 638 275 9,112 7,300 305 186 7,791 Financial assets at amortised cost 1,116,202 89,495 33,785 1,239,482 1,102,968 76,552 34,090 1,213,610 Debt instruments 113,462 501 698 114,661 103,127 203 455 103,785 Loans and advances 1,002,740 88,994 33,087 1,124,821 999,841 76,349 33,635 1,109,825 Central Banks 16,541 — — 16,541 20,082 — — 20,082 Credit institutions 56,294 — — 56,294 57,926 — — 57,926 Customers 929,905 88,994 33,087 1,051,986 921,833 76,349 33,635 1,031,817 Total 1,195,899 90,146 34,066 1,320,111 1,184,151 76,857 34,282 1,295,290 30-06-2024 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 17,665 20,089 18,003 3,234 1,237 60,228 Of which: impaired 119 177 217 167 265 945 31-12-2023 Gross amount in books on the amount of the last appraisal (loan to value) Million euros Less than or equal to 40% More than 40% or less than 60% More than 60% and less than 80% More than 80% and less or equal to 100% More than 100% Total Gross amount 18,728 20,720 18,083 2,294 1,057 60,882 Of which: impaired 131 192 199 151 235 908 At the end 30 June 2024 and 31 December 2023 the concentration of this portfolio was as follows: Loans: gross amount Million euros 30-06-2024 31-12-2023 1. Without mortgage collateral 14 16 2. With mortgage collateral 2,511 2,417 2.1 Completed buildings 994 1,032 2.1.1 Residential 663 642 2.1.2 Other 331 390 2.2 Buildings and other constructions under construction 1,497 1,364 2.2.1 Residential 1,424 1,292 2.2.2 Other 73 72 2.3 Land 20 21 2.3.1 Developed consolidated land 13 14 2.3.2 Other land 7 7 Total 2,525 2,433
Disclosure of capital ratio	Capital ratio 30-06-2024 31-12-2023 Capital ratio Level 1 ordinary eligible capital (EUR million) 77,975 76,741 Level 1 additional eligible capital (EUR million) 8,834 9,002 Level 2 eligible capital (EUR million) 17,612 16,497 Risk-weighted assets (EUR million) 624,831 623,731 Level 1 ordinary capital coefficient (CET 1) 12.48 % 12.30 % Level 1 additional capital coefficient (AT1) 1.41 % 1.45 % Level 1 capital coefficient (TIER1) 13.89 % 13.75 % Level 2 capital coefficient (TIER 2) 2.82 % 2.64 % Total capital ratio 16.71 % 16.39 %
Disclosure of leverage capital	Leverage 30-06-2024 31-12-2023 Leverage Tier 1 capital (EUR million) 86,809 85,742 Exposure (EIR million) 1,830,215 1,826,922 Leverage ratio 4.74 % 4.69 %

Additional disclosure require_2

Additional disclosure requirements (Tables)	6 Months Ended
	Jun. 30, 2024
Parent Company Financial Statements And Preference Shares And Preferred Securities [Abstract]
Condensed Balance Sheets	UNAUDITED CONDENSED BALANCE SHEETS 30 June 2024 31 December 2023 (Parent company only) (Millions of Euros) Assets Cash and due from banks 130,150 172,524 Of which: To bank subsidiaries 7,476 6,834 Trading account assets 116,064 102,296 Investment securities 72,272 63,325 Of which: To bank subsidiaries 17,403 16,137 To non-bank subsidiaries 992 1,229 Net Loans and leases 311,285 298,068 Of which: To non-bank subsidiaries 21,680 22,435 Investment in affiliated companies 100,430 99,326 Of which: To bank subsidiaries 74,374 74,016 To non-bank subsidiaries 26,056 25,310 Premises and equipment, net 6,216 6,368 Other assets 15,099 15,435 Total assets 751,517 757,342 Liabilities Deposits 369,131 398,374 Of which: To bank subsidiaries 4,489 7,832 To non-bank subsidiaries 17,123 14,610 Short-term debt 95,981 70,771 Long-term debt 120,371 129,258 Total debt 216,352 200,029 Of which: To bank subsidiaries 50 — To non-bank subsidiaries 1,193 1,816 Other liabilities 89,178 84,065 Total liabilities 674,661 682,468 Stockholders' equity Capital stock 7,747 8,092 Retained earnings and other reserves 69,109 66,782 Total stockholders' equity 76,856 74,874 Total liabilities and Stockholders’ Equity 751,517 757,342
Condensed Statements of Income	Following are the summarised unaudited condensed statements of income of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED STATEMENTS OF INCOME Six months ended Six months ended (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) Interest income 18,184 13,380 Interest from earning assets 14,014 10,249 Dividends from affiliated companies 4,170 3,131 Of which: From bank subsidiaries 3,747 2,618 From non-bank subsidiaries 423 513 Interest expense (9,993) (6,938) Interest income / (Charges) 8,191 6,442 Provision for credit losses (658) (755) Interest income / (Charges) after provision for credit losses 7,532 5,687 Non-interest income: 2,724 2,397 Non-interest expense: (4,517) (4,187) Income before income taxes 5,739 3,897 Income tax expense (337) (243) Net income 5,402 3,654
Condensed Statements of Comprehensive Income	Following are the summarised unaudited condensed statements of comprehensive income of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED STATEMENTS OF Six months ended Six months ended COMPREHENSIVE INCOME (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) NET INCOME 5,402 3,654 OTHER COMPREHENSIVE INCOME 71 (183) Items that may be reclassified subsequently to profit or loss 93 104 Hedging instruments (items not designated) — — Revaluation gains (losses) — — Amounts transferred to income statement — — Other reclassifications — — Debt instruments at fair value with changes in other comprehensive income (26) 43 Revaluation gains (losses) (95) 38 Amounts transferred to income statement 69 5 Other reclassifications — — Cash flow hedges: 163 133 Revaluation gains/(losses) (13) (24) Amounts transferred to income statement 176 157 Amounts transferred to initial carrying amount of hedged items — — Other reclassifications — — Hedges of net investments in foreign operations: — — Exchange differences — — Non-current assets held for sale — — Income tax (44) (72) Items that will not be reclassified to profit or loss: (22) (287) Actuarial gains/(losses) on pension plans 2 12 Other recognised income and expense of investments in subsidiaries, joint ventures and associates — — Changes in the fair value of equity instruments measured at fair value through other comprehensive income 17 (275) Gains or losses resulting from the accounting for hedges of equity instruments measured at fair value through other comprehensive income, net — — Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedged item) 4 (41) Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedging instrument) (4) 41 Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk (61) (34) Income tax relating to items that will not be reclassified 20 10 TOTAL COMPREHENSIVE INCOME 5,473 3,471
Condensed Cash Flow Statements	Following are the summarised unaudited condensed cash flow statements of Banco Santander, S.A. for the periods ended 30 June 2024 and 2023. UNAUDITED CONDENSED CASH FLOW STATEMENTS Six months ended Six months ended (Parent company only) 30 June 2024 30 June 2023 (Millions of Euros) 1. Cash flows from operating activities Consolidated profit 5,402 3,654 Adjustments to profit (2,740) 2,080 Net increase/decrease in operating assets (45,848) (10,186) Net increase/decrease in operating liabilities (11,864) (14,608) Reimbursements/payments of income tax 1,063 1,134 Total net cash flows from operating activities (1) (53,987) (17,926) 2. Cash flows from investing activities Investments (-) (1,850) (2,438) Divestments (+) 4,285 4,099 Total net cash flows from investment activities (2) 2,435 1,661 3. Cash flows from financing activities Issuance of own equity instruments — — Disposal of own equity instruments 302 336 Acquisition of own equity instruments (2,032) (1,622) Issuance of debt securities 3,908 1,500 Redemption of debt securities (2,994) (438) Dividends paid (1,485) (963) Issuance/Redemption of equity instruments — — Other collections/payments related to financing activities (151) (87) Total net cash flows from financing activities (3) (2,452) (1,274) 4. Effect of exchange rate changes on cash and cash equivalents (4) 1,156 (429) 5. Net increase/decrease in cash and cash equivalents (1+2+3+4) (52,848) (17,968) Cash and cash equivalents at beginning of period 125,020 130,083 Cash and cash equivalents at end of period 72,172 112,115
Schedule of preference shares and preferred securities	The following table shows the balance of the preference shares and preferred securities as of 30 June 2024 and 31 December 2023: 30 June 2024 31 December 2023 (Millions of Euros) Preference shares 207 202 Preferred securities 8,281 9,081 Total at period-end 8,488 9,283
Schedule of preference shares and preferred securities by issuer	Outstanding at 30 June 2024 Amount in Preference Shares currency Interest rate Redemption Issuer/Date of issue Currency (million) Option (A) Santander UK plc, October 1995 Pounds Sterling 80.3 10.375 % No option Santander UK plc, February 1996 Pounds Sterling 80.3 10.375 % No option Outstanding at 30 June 2024 Amount in Preferred Securities currency Interest rate Maturity date Issuer/Date of issue Currency (million) Banco Santander, S.A. Banco Santander, S.A., March 2018 Euro 187.6 4.75 % (B) Perpetuity Banco Santander, S.A., January 2020 Euro 1,498.6 4.375 % (C) Perpetuity Banco Santander, S.A., May 2021 US Dollar 1,000.0 4.75 % (D) Perpetuity Banco Santander, S.A., May 2021 Euro 750.0 4.125 % (E) Perpetuity Banco Santander, S.A., September 2021 Euro 990.0 3.625 % (F) Perpetuity Banco Santander, S.A., November 2023 US Dollar 1,149.6 9.625 % (G) Perpetuity Banco Santander, S.A., November 2023 US Dollar 1,349.8 9.625 % (H) Perpetuity Banco Santander, S.A., May 2024 Euro 1,500.0 7.00 % (I) 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 A.From these dates the issuer can redeem the shares, subject to prior authorization by the national supervisor. B.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.75% interest rate is set for the first seven years. After that, it will be reviewed by applying a margin of 409.7 basis points on the 5-year Mid-Swap Rate. C.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.375% interest rate is set for the first six years. After that, it will be reviewed every 5 years by applying a margin of 453.4 basis points on the 5-year Mid-Swap Rate. D.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.750% interest rate is set for the first six years, revised every 5 years thereafter by applying a margin of 375.3 basis points over the 5-year UST rate. E.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.125% interest rate is set for the first seven years, revised every 5 years thereafter by applying a margin of 431.1 basis points over the applicable 5-year Euro Mid-Swap Rate. F.Payment is subject to certain conditions and to the discretion of Banco Santander. The 3.625% interest rate is set for the first eight years, revised every 5 years thereafter by applying a margin of 376 basis points over the 5-year Mid-Swap Rate. G.Payment is subject to certain conditions and to the discretion of Banco Santander. The 9.625% interest rate is set for the first five years and six months, revised every 5 years thereafter by applying a margin of 530.6 basis points on the 5-year UST rate. H.Payment is subject to certain conditions and to the discretion of Banco Santander. The 9.625% interest rate is set for the first ten years, revised every 5 years thereafter by applying a margin of 529.8 basis points on the 5-year UST rate. I.Payment is subject to certain conditions and to the discretion of Banco Santander. The 7.00% interest rate is set for the first six years, revised every 5 years thereafter by applying a margin of 443.2 basis points on the 5-year Mid-Swap rate.

Introduction, basis of presen_3

Introduction, basis of presentation of the interim condensed consolidated financial statements and other information - Use of critical estimates (Details)	Jun. 30, 2024 $ / €
Corporate information and statement of IFRS compliance [abstract]
Theoretical exchange rate	1,499

Introduction, basis of presen_4

Introduction, basis of presentation of the interim condensed consolidated financial statements and other information - Comparative information (Details)	6 Months Ended
	Jun. 30, 2024
Mexico, Pesos
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(4.45%)
Change in average foreign currency exchange rate (as a percent)	6.12%
United States of America, Dollars
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	3.18%
Change in average foreign currency exchange rate (as a percent)	(0.06%)
Brazil, Brazil Real
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(9.73%)
Change in average foreign currency exchange rate (as a percent)	(0.21%)
United Kingdom, Pounds
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	2.38%
Change in average foreign currency exchange rate (as a percent)	2.52%
Chile, Pesos
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	(4.57%)
Change in average foreign currency exchange rate (as a percent)	(14.30%)
Poland, Zlotych
Disclosure of initial application of standards or interpretations [line items]
Change in foreign currency exchange rate (as a percent)	0.82%
Change in average foreign currency exchange rate (as a percent)	7.11%

Introduction, basis of presen_5

Introduction, basis of presentation of the interim condensed consolidated financial statements and other information - Other information (Details) - EUR (€) € in Millions	Jan. 01, 2024	Jan. 01, 2023
Regulatory Framework Related Provisions | Spain
Disclosure of other provisions [line items]
Additional provisions charged to income statement	€ 335	€ 224

Shareholder remuneration syst_3

Shareholder remuneration system and earnings per share - Schedule of shareholder remuneration (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Earnings per share [abstract]
Dividends paid, ordinary shares, % of par value	19.17%	11.90%
Dividends paid, other shares (without vote, redeemable, etc.), % of par value	0%	0%
Total remuneration paid, % of par value	19.17%	11.90%
Dividends paid out of profit, % of par value	19.17%	11.90%
Dividends paid with a charge to reserves or share premium, % of par value	0%	0%
Dividend in kind, % of par value	0%	0%
Flexible payment, % of par value	0%	0%
Dividend paid, ordinary shares (in euro per share)	€ 0.095	€ 0.0595
Dividends paid, other shares (without vote, redeemable, etc.) (in euro per share)	0	0
Total remuneration paid (in euro per share)	0.095	0.0595
Dividends paid out of profit (in euro per share)	0.095	0.0595
Dividends paid with a charge to reserves or share premium (in euro per share)	0	0
Dividend in kind (in euro per share)	0	0
Flexible payment (in euro per share)	€ 0	€ 0
Dividends paid, ordinary shares	€ 1,485	€ 963
Dividends paid, other shares	0	0
Dividends paid, ordinary and other shares	1,485	963
Dividends paid out of profit	1,485	963
Dividend paid with a charge to reserves or share premium	0	0
Dividend in kind	0	0
Flexible payment	€ 0	€ 0

Shareholder remuneration syst_4

Shareholder remuneration system and earnings per share - Narrative (Details) - EUR (€) € / shares in Units, € in Millions			1 Months Ended	4 Months Ended
	May 02, 2024	May 02, 2023	Apr. 30, 2023	Jun. 21, 2024
2022 Program, Second
Earnings per share [line items]
Share buyback program, amount			€ 921
2023 Program, Second
Earnings per share [line items]
Share buyback program, amount				€ 1,459
Complementary Dividend
Earnings per share [line items]
Dividends recognised as distributions to owners per share (in euro per share)	€ 9.50	€ 5.95

Shareholder remuneration syst_5

Shareholder remuneration system and earnings per share - Schedule of basic earnings per share (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Basic earnings per share [abstract]
Profit attributable to the Parent (EUR million)	€ 6,059	€ 5,241
Remuneration of contingently convertible preferred securities (CCPS) (EUR million)	(309)	(229)
Net profit for the year	5,750	5,012
Profit or Loss from discontinued operations (non controlling interest net) (EUR million)	0	0
Profit or Loss from continuing operations (CCPS net) (EUR million)	€ 5,750	€ 5,012
Weighted average number of shares outstanding (in shares)	15,664,707,190	16,279,041,269
Basic earnings per share (in euro per share)	€ 0.37	€ 0.31
Basic earnings per share from discontinued operations (in euro per share)	0	0
Basic earnings per share from continuing operations (in euro per share)	€ 0.37	€ 0.31

Shareholder remuneration syst_6

Shareholder remuneration system and earnings per share - Schedule of diluted earnings per share (Details) - EUR (€) € / shares in Units, € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Diluted earnings per share [abstract]
Profit attributable to the Parent (EUR million)	€ 6,059	€ 5,241
Remuneration of contingently convertible preferred securities (CCPS) (EUR million)	(309)	(229)
Net profit for the year	5,750	5,012
Profit or Loss from discontinued operations (non controlling interest net) (EUR million)	0	0
Profit or Loss from continuing operations (CCPS net) (EUR million)	€ 5,750	€ 5,012
Weighted average number of shares outstanding (in shares)	15,664,707,190	16,279,041,269
Dilutive effect of options/receipt of shares (in shares)	70,622,287	67,704,709
Adjusted number of shares (in shares)	15,735,329,477	16,346,745,978
Diluted earnings per share (in euro per share)	€ 0.37	€ 0.31
Diluted earnings per share from discontinued operations (in euro per share)	0	0
Diluted earnings per share from continuing operations (in euro per share)	€ 0.37	€ 0.31

Remuneration and other benefi_3

Remuneration and other benefits paid to Banco Santander’s directors and senior managers - Schedule of remuneration of members of the board of directors (Details) - Board directors - EUR (€) € in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Remuneration concept
Fixed salary remuneration of executive directors	€ 3,292	€ 3,136
Variable salary remuneration of executive directors	0	0
Directors' fees	597	628
Bylaw-stipulated emoluments (annual emolument)	1,754	2,113
Other	2,173	2,083
Sub-total	7,816	7,960
Transactions with shares and/or other financial instruments	0	0
Total remuneration	€ 7,816	€ 7,960

Remuneration and other benefi_4

Remuneration and other benefits paid to Banco Santander’s directors and senior managers - Schedule of other benefits of members of the board of directors (Details) - EUR (€) € in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Board directors
Other benefits
Advances	€ 0	€ 0
Loans granted	99	144
Pension funds and plans: Endowments and/or contributions	1,197	1,055
Pension funds and plans: Accumulated rights	73,481	66,792
Life insurance premiums	720	563
Guarantees provided for directors	0	0
Former board directors
Other benefits
Pension funds and plans: Accumulated rights	€ 44,456	€ 46,275

Remuneration and other benefi_5

Remuneration and other benefits paid to Banco Santander’s directors and senior managers - Schedule of remuneration of senior management (Details) € in Thousands	6 Months Ended
	Jun. 30, 2024 EUR (€) employee	Jun. 30, 2023 EUR (€) employee
Senior management
Disclosure of transactions between related parties [line items]
Total remuneration of senior management	€ 13,423	€ 12,761
Number of employees | employee	13	14
Senior management, ceased functions during the period
Disclosure of transactions between related parties [line items]
Remunerations received by members of senior management who ceased in their functions	€ 2,594	€ 511

Remuneration and other benefi_6

Remuneration and other benefits paid to Banco Santander’s directors and senior managers - Schedule of funds and pension plans of senior management (Details) - EUR (€) € in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Senior management
Disclosure of transactions between related parties [line items]
Pension funds: Endowments and/or contributions	€ 2,376	€ 2,550
Pension funds: Accumulated rights	59,672	55,451
Remunerations received as endowments and/or contributions to pension funds by members of the senior management who ceased in their functions	168	108
Retired senior management
Disclosure of transactions between related parties [line items]
Pension funds: Accumulated rights	€ 83,485	€ 90,401

Financial assets - Schedule of

Financial assets - Schedule of components of financial assets (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Instruments
Financial assets held for trading	€ 206,874	€ 176,921
Non-trading financial assets mandatorily at fair value through profit or loss	6,166	5,910
Financial assets designated at fair value through profit or loss	9,169	9,773
Financial assets at fair value through other comprehensive income	82,270	83,308
Financial assets at amortised cost	1,217,341	1,191,403
Derivatives
Debt Instruments
Financial assets held for trading	58,928	56,328
Equity instruments
Debt Instruments
Financial assets held for trading	16,764	15,057
Non-trading financial assets mandatorily at fair value through profit or loss	4,432	4,068
Financial assets at fair value through other comprehensive income	1,842	1,761
Debt instruments
Debt Instruments
Financial assets held for trading	71,523	62,124
Non-trading financial assets mandatorily at fair value through profit or loss	684	860
Financial assets designated at fair value through profit or loss	3,174	3,095
Financial assets at fair value through other comprehensive income	71,160	73,565
Financial assets at amortised cost	114,347	103,559
Loans and advances
Debt Instruments
Financial assets held for trading	59,659	43,412
Non-trading financial assets mandatorily at fair value through profit or loss	1,050	982
Financial assets designated at fair value through profit or loss	5,995	6,678
Financial assets at fair value through other comprehensive income	9,268	7,982
Financial assets at amortised cost	1,102,994	1,087,844
Central Banks
Debt Instruments
Financial assets held for trading	17,283	17,717
Non-trading financial assets mandatorily at fair value through profit or loss	0	0
Financial assets designated at fair value through profit or loss	0	0
Financial assets at fair value through other comprehensive income	0	0
Financial assets at amortised cost	16,541	20,082
Credit institutions
Debt Instruments
Financial assets held for trading	22,477	14,061
Non-trading financial assets mandatorily at fair value through profit or loss	0	0
Financial assets designated at fair value through profit or loss	444	459
Financial assets at fair value through other comprehensive income	335	313
Financial assets at amortised cost	56,290	57,917
Customers
Debt Instruments
Financial assets held for trading	19,899	11,634
Non-trading financial assets mandatorily at fair value through profit or loss	1,050	982
Financial assets designated at fair value through profit or loss	5,551	6,219
Financial assets at fair value through other comprehensive income	8,933	7,669
Financial assets at amortised cost	€ 1,030,163	€ 1,009,845

Financial assets - Disclosure o

Financial assets - Disclosure of gross exposure by stages of impairment (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	€ 1,320,111	€ 1,295,290
Other assets | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,195,899	1,184,151
Other assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	90,146	76,857
Impaired assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	34,066	34,282
Financial assets at fair value through other comprehensive income
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	80,629	81,680
Financial assets at fair value through other comprehensive income | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	71,182	73,576
Financial assets at fair value through other comprehensive income | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	9,447	8,104
Financial assets at fair value through other comprehensive income | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	335	313
Financial assets at fair value through other comprehensive income | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	9,112	7,791
Financial assets at fair value through other comprehensive income | Other assets | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	79,697	81,183
Financial assets at fair value through other comprehensive income | Other assets | Next 12 months | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	71,163	73,570
Financial assets at fair value through other comprehensive income | Other assets | Next 12 months | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	8,534	7,613
Financial assets at fair value through other comprehensive income | Other assets | Next 12 months | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	335	313
Financial assets at fair value through other comprehensive income | Other assets | Next 12 months | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	8,199	7,300
Financial assets at fair value through other comprehensive income | Other assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	651	305
Financial assets at fair value through other comprehensive income | Other assets | Lifetime expected credit losses | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	13	0
Financial assets at fair value through other comprehensive income | Other assets | Lifetime expected credit losses | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	638	305
Financial assets at fair value through other comprehensive income | Other assets | Lifetime expected credit losses | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	0	0
Financial assets at fair value through other comprehensive income | Other assets | Lifetime expected credit losses | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	638	305
Financial assets at fair value through other comprehensive income | Impaired assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	281	192
Financial assets at fair value through other comprehensive income | Impaired assets | Lifetime expected credit losses | Debt instruments
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 | Impaired assets | Lifetime expected credit losses | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	275	186
Financial assets at fair value through other comprehensive income | Impaired assets | Lifetime expected credit losses | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	0	0
Financial assets at fair value through other comprehensive income | Impaired assets | Lifetime expected credit losses | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	275	186
Financial assets at amortised cost
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,239,482	1,213,610
Financial assets at amortised cost | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	114,661	103,785
Financial assets at amortised cost | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,124,821	1,109,825
Financial assets at amortised cost | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	56,294	57,926
Financial assets at amortised cost | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,051,986	1,031,817
Financial assets at amortised cost | Central Banks
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	16,541	20,082
Financial assets at amortised cost | Other assets | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,116,202	1,102,968
Financial assets at amortised cost | Other assets | Next 12 months | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	113,462	103,127
Financial assets at amortised cost | Other assets | Next 12 months | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	1,002,740	999,841
Financial assets at amortised cost | Other assets | Next 12 months | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	56,294	57,926
Financial assets at amortised cost | Other assets | Next 12 months | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	929,905	921,833
Financial assets at amortised cost | Other assets | Next 12 months | Central Banks
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	16,541	20,082
Financial assets at amortised cost | Other assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	89,495	76,552
Financial assets at amortised cost | Other assets | Lifetime expected credit losses | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	501	203
Financial assets at amortised cost | Other assets | Lifetime expected credit losses | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	88,994	76,349
Financial assets at amortised cost | Other assets | Lifetime expected credit losses | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	0	0
Financial assets at amortised cost | Other assets | Lifetime expected credit losses | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	88,994	76,349
Financial assets at amortised cost | Other assets | Lifetime expected credit losses | Central Banks
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	0	0
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	33,785	34,090
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses | Debt instruments
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	698	455
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses | Loans and advances
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	33,087	33,635
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses | Credit institutions
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	0	0
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	33,087	33,635
Financial assets at amortised cost | Impaired assets | Lifetime expected credit losses | Central Banks
Disclosure of reconciliation of changes in loss allowance of financial instruments
Maximum exposure to credit risk	€ 0	€ 0

Financial assets - Narrative (D

Financial assets - Narrative (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Debt Instruments
Exposure in impaired assets purchased with impairment	€ 1,320,111		€ 1,295,290
Impairment loss (reversal)	6,577	€ 6,237
Financial assets at amortised cost
Debt Instruments
Exposure in impaired assets purchased with impairment	1,239,482		1,213,610
Previously written-off assets recovered	803	864
Loss due to contract renegotiation and modification	260	264
Impairment loss (reversal)	6,569	€ 6,243
Financial instruments purchased credit impaired
Debt Instruments
Exposure in impaired assets purchased with impairment	674		€ 743
Financial instruments purchased credit impaired | Business combinations carried out
Debt Instruments
Exposure in impaired assets purchased with impairment	€ 252

Financial assets - Disclosure_2

Financial assets - Disclosure of reconciliation of changes in loss allowance (Details) - Financial assets at amortised cost - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment losses charged to income for the period	€ 7,112	€ 6,843
Impairment losses charged to income	13,186	11,225
Impairment losses reversed with a credit to income	(6,074)	(4,382)
Perimeter Changes	0	(37)
Write-off of impaired balances against recorded impairment allowance	(6,439)	(6,831)
Exchange differences and other	(808)	492
Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	22,950	22,888
Impairment allowance at end of year	22,815	23,355
Impaired assets | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	14,429	14,271
Other assets | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	8,386	9,084
Individually calculated | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	2,964	2,858
Collectively calculated | Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	€ 19,851	€ 20,497

Financial assets - Disclosure_3

Financial assets - Disclosure of reconciliation of changes in gross carrying amount for financial instruments (Details) - Financial assets at amortised cost - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of reconciliation of changes in loss allowance of financial instruments
Net changes of the exposure and modifications in the credit risk	€ 0	€ 37
Write-offs	6,439	6,831
Exchange differences and other	(808)	492
Accumulated impairment
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	22,950	22,888
Impairment allowance at end of year	22,815	23,355
Accumulated impairment | Other assets
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	8,386	9,084
Accumulated impairment | Impaired assets
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at end of year	14,429	14,271
Accumulated impairment | Loans and advances to customers
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	22,666	22,666
Transfers between stages	3,923	3,668
Net changes of the exposure and modifications in the credit risk	3,069	3,119
Write-offs	(6,439)	(6,801)
Exchange differences and other	(773)	434
Impairment allowance at end of year	22,446	23,086
Accumulated impairment | Loans and advances to customers | Other assets | Next 12 months
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	3,587	3,611
Transfers between stages	(627)	(454)
Net changes of the exposure and modifications in the credit risk	530	605
Write-offs	0	0
Exchange differences and other	(186)	88
Impairment allowance at end of year	3,304	3,850
Accumulated impairment | Loans and advances to customers | Other assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	4,930	5,124
Transfers between stages	609	355
Net changes of the exposure and modifications in the credit risk	(423)	(377)
Write-offs	0	0
Exchange differences and other	(78)	97
Impairment allowance at end of year	5,038	5,199
Accumulated impairment | Loans and advances to customers | Impaired assets | Lifetime expected credit losses
Disclosure of reconciliation of changes in loss allowance of financial instruments
Impairment allowance at beginning of year	14,149	13,931
Transfers between stages	3,941	3,767
Net changes of the exposure and modifications in the credit risk	2,962	2,891
Write-offs	(6,439)	(6,801)
Exchange differences and other	(509)	249
Impairment allowance at end of year	€ 14,104	€ 14,037

Financial assets - Disclosure_4

Financial assets - Disclosure of reconciliation of financial assets classified at amortised cost (Details) - Financial assets at amortised cost - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of reconciliation of changes in loss allowance of financial instruments
Perimeter Changes	€ 0	€ (37)
Written-off assets	(6,439)	(6,831)
Exchange differences and other	808	(492)
Gross carrying amount | Impaired assets
Disclosure of reconciliation of changes in loss allowance of financial instruments
Financial assets at beginning of period	34,363	33,269
Net additions	6,747	6,480
Perimeter Changes	13	(45)
Written-off assets	(6,439)	(6,831)
Exchange differences and other	(647)	773
Financial assets at end of period	€ 34,037	€ 33,646

Financial assets - Schedule o_2

Financial assets - Schedule of collaterals received for financial assets (Details) - Financial assets at amortised cost - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of financial assets that are either past due or impaired [line items]
Real collaterals value	€ 639,735	€ 630,939
Other collaterals value	94,442	96,164
Total value of the collaterals received	734,177	727,103
Credit impaired | Impaired assets
Disclosure of financial assets that are either past due or impaired [line items]
Real collaterals value	12,920	12,894
Other collaterals value	€ 1,917	€ 2,131

Financial assets - Schedule o_3

Financial assets - Schedule of financial assets measured at other than fair value (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	€ 1,217,341	€ 1,191,403
Fair  value
Disclosure of fair value measurement of assets [line items]
Financial assets, at fair value	1,203,396	1,180,431
Loans and advances | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	1,102,994	1,087,844
Loans and advances | Fair  value
Disclosure of fair value measurement of assets [line items]
Financial assets, at fair value	1,091,255	1,077,543
Debt instruments | Carrying amount
Disclosure of fair value measurement of assets [line items]
Financial assets	114,347	103,559
Debt instruments | Fair  value
Disclosure of fair value measurement of assets [line items]
Financial assets, at fair value	€ 112,141	€ 102,888

Non-current assets held for s_3

Non-current assets held for sale - Schedule of non-current assets classified as held for sale (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets And Liabilities Classified As Held For Sale [Line Items]
Tangible assets	€ 33,709	€ 33,882
Other assets	9,707	8,856
Non-current assets or disposal groups classified as held for sale	2,915	3,014
Non-current assets held for sale
Assets And Liabilities Classified As Held For Sale [Line Items]
Tangible assets	2,892	2,991
Other assets	23
Non-current assets or disposal groups classified as held for sale	2,915	3,014
Non-current assets held for sale | Foreclosed assets
Assets And Liabilities Classified As Held For Sale [Line Items]
Tangible assets	2,668	2,773
Other tangible assets held for sale	224	218
Other assets		23
Non-current assets held for sale | Spain | Foreclosed assets
Assets And Liabilities Classified As Held For Sale [Line Items]
Tangible assets	€ 2,037	€ 2,138

Non-current assets held for s_4

Non-current assets held for sale - Narrative (Details) - Non-current assets held for sale - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets And Liabilities Classified As Held For Sale [Line Items]
Provision recognised for non-current assets held for sale	€ 2,784		€ 2,956
Net charges recorded against valuation allowances	80	€ 63
Recoveries	€ 25	€ 16

Tangible assets (Details)

Tangible assets (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Property, plant and equipment [abstract]
Acquisitions, property, plant and equipment	€ 4,738	€ 4,705
Disposals, property, plant and equipment	2,979	2,713
(Losses) gains on disposals of property, plant and equipment	12	€ 24
Right-of-use assets	€ 1,999		€ 2,182

Intangible assets - Schedule of

Intangible assets - Schedule of goodwill based on cash-generating units (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of information for cash-generating units [line items]
Goodwill	€ 13,668	€ 14,017
Banco Santander (Brazil)
Disclosure of information for cash-generating units [line items]
Goodwill	3,321	3,679
SAM Investment Holdings Limited
Disclosure of information for cash-generating units [line items]
Goodwill	1,444	1,444
Santander Consumer Germany
Disclosure of information for cash-generating units [line items]
Goodwill	1,304	1,304
Santander Bank Polska
Disclosure of information for cash-generating units [line items]
Goodwill	1,169	1,159
Santander Portugal
Disclosure of information for cash-generating units [line items]
Goodwill	1,040	1,040
Santander US Auto
Disclosure of information for cash-generating units [line items]
Goodwill	1,035	1,003
Santander España
Disclosure of information for cash-generating units [line items]
Goodwill	998	998
Santander Holding USA (ex. Auto)
Disclosure of information for cash-generating units [line items]
Goodwill	839	814
Santander UK
Disclosure of information for cash-generating units [line items]
Goodwill	627	612
Grupo Financiero Santander (Mexico)
Disclosure of information for cash-generating units [line items]
Goodwill	500	523
Banco Santander - Chile
Disclosure of information for cash-generating units [line items]
Goodwill	492	516
Ebury Partners
Disclosure of information for cash-generating units [line items]
Goodwill	333	350
Santander Consumer Nordics
Disclosure of information for cash-generating units [line items]
Goodwill	216	206
Other entities
Disclosure of information for cash-generating units [line items]
Goodwill	€ 350	€ 369

Intangible assets - Narrative (

Intangible assets - Narrative (Details) € in Millions	6 Months Ended
	Jun. 30, 2024 EUR (€)
Intangible assets and goodwill [abstract]
Increase (decrease) in goodwill	€ (349)
Impairment loss recognised in profit or loss, goodwill	€ 0

Financial liabilities - Schedul

Financial liabilities - Schedule of components of financial liabilities other than hedging derivatives (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	€ 133,856	€ 122,270
Financial liabilities designated at fair value through profit or loss	34,493	40,367
Financial liabilities at amortised cost	1,454,896	1,468,703
Derivatives
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	52,261	50,589
Short Positions
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	29,653	26,174
Deposits
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	51,942	45,507
Financial liabilities designated at fair value through profit or loss	27,751	34,996
Financial liabilities at amortised cost	1,106,860	1,125,308
Central banks
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	11,057	7,808
Financial liabilities designated at fair value through profit or loss	1,605	1,209
Financial liabilities at amortised cost	34,097	48,782
Credit institutions
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	17,156	17,862
Financial liabilities designated at fair value through profit or loss	1,337	1,735
Financial liabilities at amortised cost	83,655	81,246
Customer
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	23,729	19,837
Financial liabilities designated at fair value through profit or loss	24,809	32,052
Financial liabilities at amortised cost	989,108	995,280
Debt instruments
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	0	0
Financial liabilities designated at fair value through profit or loss	6,726	5,371
Financial liabilities at amortised cost	305,136	303,208
Other financial liabilities
Disclosure of financial liabilities [line items]
Financial liabilities held for trading	0	0
Financial liabilities designated at fair value through profit or loss	16	0
Financial liabilities at amortised cost	€ 42,900	€ 40,187

Financial liabilities - Disclos

Financial liabilities - Disclosure of composition of debt instruments excluding promissory notes (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Bonds and debentures outstanding
Disclosure of financial liabilities [line items]
Financial liabilities	€ 239,696	€ 231,880	€ 217,735	€ 211,597
Subordinated
Disclosure of financial liabilities [line items]
Financial liabilities	32,111	30,529	€ 26,864	€ 25,717
Debt instruments
Disclosure of financial liabilities [line items]
Financial liabilities	311,862	308,579
Debt instruments | Bonds and debentures outstanding
Disclosure of financial liabilities [line items]
Financial liabilities	239,696	231,880
Debt instruments | Subordinated
Disclosure of financial liabilities [line items]
Financial liabilities	32,111	30,529
Debt instruments | Promissory notes and other securities
Disclosure of financial liabilities [line items]
Financial liabilities	€ 40,055	€ 46,170

Financial liabilities - Discl_2

Financial liabilities - Disclosure of reconciliation of debt instruments (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Changes in financial instruments, Liabilities
Perimeter	€ (557)
Bonds and debentures outstanding
Changes in financial instruments, Liabilities
Balance at beginning of period	231,880	€ 211,597
Perimeter	(1,224)	(1,467)
Issuances or placements	41,185	34,438
Repurchases or redemptions	(32,172)	(28,534)
Exchange rate and other adjustments	27	1,701
Balance at end of period	239,696	217,735
Subordinated
Changes in financial instruments, Liabilities
Balance at beginning of period	30,529	25,717
Perimeter	0	0
Issuances or placements	3,908	1,500
Repurchases or redemptions	(2,422)	(36)
Exchange rate and other adjustments	96	(317)
Balance at end of period	32,111	26,864
Bonds and debentures and subordinated liabilities
Changes in financial instruments, Liabilities
Balance at beginning of period	262,409	237,314
Perimeter	(1,224)	(1,467)
Issuances or placements	45,093	35,938
Repurchases or redemptions	(34,594)	(28,570)
Exchange rate and other adjustments	123	1,384
Balance at end of period	€ 271,807	€ 244,599

Financial liabilities - Narrati

Financial liabilities - Narrative (Details) € in Millions, $ in Millions	May 20, 2024 EUR (€)	Mar. 14, 2024 EUR (€)	Jan. 22, 2024 EUR (€)	May 23, 2023 EUR (€)	Jun. 30, 2024 EUR (€)	Mar. 14, 2024 USD ($)	Feb. 08, 2024 EUR (€)	Feb. 08, 2024 USD ($)	Dec. 31, 2023 EUR (€)
Disclosure of financial liabilities [line items]
Other financial liabilities					€ 42,900				€ 40,187
Subordinated Liabilities, Preference Shares
Disclosure of financial liabilities [line items]
Notional amount	€ 187.6
Subordinated | Issuance By Banco Santander SA In May 2023
Disclosure of financial liabilities [line items]
Notional amount			€ 1,250
Interest rate			5%
Initial interest rate term			5 years 3 months
Adjustment to reference rate, after initial interest rate period			2.50%
Subordinated issue, term			10 years 3 months
Notional amount, placed on the market (in percentage)			99.739%
Subordinated issue, Euro Swap rate term			5 years
Subordinated | Issuance By Banco Santander SA In May 2023
Disclosure of financial liabilities [line items]
Notional amount				€ 1,500
Interest rate				5.75%
Initial interest rate term				5 years 3 months
Adjustment to reference rate, after initial interest rate period				2.85%
Subordinated issue, term				10 years 3 months
Subordinated issue, Euro Swap rate term				5 years
Repaid By Banco Santander S.A. In May 2024 | Subordinated Liabilities, Preference Shares
Disclosure of financial liabilities [line items]
Notional amount	1,312.4
Issuance By Banco Santander S.A. In May 2024 | Subordinated Liabilities, Preference Shares
Disclosure of financial liabilities [line items]
Notional amount	€ 1,500
Interest rate	7%
Initial interest rate term	6 years
Reprice term	5 years
Subordinated issue, mid-swap rate term	5 years
Issuance By Banco Santander S.A. In May 2024 | Subordinated Liabilities, Preference Shares | Mid Swap Rate Five Year Euro
Disclosure of financial liabilities [line items]
Adjustment to reference rate, after initial interest rate period	4.432%
Issuance By Banco Santander S.A. In March 2024 | Subordinated
Disclosure of financial liabilities [line items]
Notional amount		€ 1,158				$ 1,250
Interest rate		6.35%				6.35%
Subordinated issue, term		10 years
Repaid By Banco Santander S.A. In February 2024 | Tier One Contingently Convertible Preferred Securities
Disclosure of financial liabilities [line items]
Notional amount							€ 1,110	$ 1,200

Financial liabilities - Sched_2

Financial liabilities - Schedule of financial liabilities measured at other than fair value (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of financial liabilities [line items]
Financial liabilities, at fair value	€ 1,433	€ 1,227
Debt instruments
Disclosure of financial liabilities [line items]
Financial liabilities	311,862	308,579
Carrying amount
Disclosure of financial liabilities [line items]
Financial liabilities	1,411,996	1,428,516
Carrying amount | Deposits
Disclosure of financial liabilities [line items]
Financial liabilities	1,106,860	1,125,308
Carrying amount | Debt instruments
Disclosure of financial liabilities [line items]
Financial liabilities	305,136	303,208
Fair  value
Disclosure of financial liabilities [line items]
Financial liabilities, at fair value	1,407,459	1,423,165
Fair  value | Deposits
Disclosure of financial liabilities [line items]
Financial liabilities, at fair value	1,105,646	1,124,373
Fair  value | Debt instruments
Disclosure of financial liabilities [line items]
Financial liabilities, at fair value	€ 301,813	€ 298,792

Provisions - Schedule of other

Provisions - Schedule of other provisions by type of provision (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of other provisions [line items]
Provisions	€ 8,401	€ 8,441
Other combined provisions
Disclosure of other provisions [line items]
Provisions	4,873	4,634
Provisions for taxes
Disclosure of other provisions [line items]
Provisions	714	745
Provisions for employment-related proceedings | Brazil
Disclosure of other provisions [line items]
Provisions	612	611
Provisions for other legal proceedings
Disclosure of other provisions [line items]
Provisions	1,305	1,359
Provision for customer remediation
Disclosure of other provisions [line items]
Provisions	535	454
Provision for restructuring
Disclosure of other provisions [line items]
Provisions	663	596
Other
Disclosure of other provisions [line items]
Provisions	€ 1,044	€ 869

Provisions - Narrative (Details

Provisions - Narrative (Details) - Brazil € in Millions	6 Months Ended
	Jun. 30, 2024 EUR (€)
Provisions for employment-related proceedings
Disclosure of other provisions [line items]
Additional provisions charged to income statement	€ 267
Use of the available provisions	202
Provisions for other legal proceedings
Disclosure of other provisions [line items]
Additional provisions charged to income statement	140
Use of the available provisions	€ 100

Provisions - Tax-related litiga

Provisions - Tax-related litigation (Details) € in Millions	Jun. 30, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Jun. 13, 2023 case	Oct. 31, 2021 decision
Disclosure of other provisions [line items]
PROVISIONS	€ 8,401	€ 8,441
Number of decision appealed before European Courts | decision				2
Banco Santander (Brazil)
Disclosure of other provisions [line items]
Tax legal obligations with probable loss risk	759
Estimated financial effect of contingent liabilities	4,815
Legal case relating to Programa de Integraçao Social (PIS) and Contribuição para Financiamento da Seguridade Social (COFINS)
Disclosure of other provisions [line items]
Number of unfavorably cases ruled by Federal Supreme Court | case			2
Legal case relating to questionable deduction of loan losses in income tax returns | Banco Santander (Brazil)
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case relating to tax deductibility of sale of shares | Banco Santander (Brazil)
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case appeal relating to deduction of expenses in income tax (IRPJ and CSLL) | Banco Santander Brasil SA
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case relating to tax deductibility of amortization of goodwill arising on acquisition | Banco Santander (Brazil) | Banco Comercial e de Investimento Sudameris S.A
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case relating to tax deductibility of amortization of goodwill arising on acquisition | Banco Santander (Brazil) | Getnet Tecnologia Proces S.A.
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case related to tax compensation with credits | Banco Santander (Brazil)
Disclosure of other provisions [line items]
PROVISIONS	0
Legal case related to infringement notices initiated by tax authorities regarding offsetting tax losses | Banco Santander (Brazil)
Disclosure of other provisions [line items]
PROVISIONS	0
Legal Case Related To Withholding Income Tax On Payments Derived From Technology Services | Banco Santander Brasil SA
Disclosure of other provisions [line items]
PROVISIONS	€ 0

Provisions - Non-tax-related pr

Provisions - Non-tax-related proceedings (Details) € in Thousands, £ in Millions, zł in Millions, R$ in Billions

5 Months Ended

6 Months Ended

12 Months Ended

19 Months Ended

Jul. 11, 2024

Jul. 11, 2023 EUR (€)

Feb. 06, 2023 EUR (€)

Jun. 29, 2022 magistrate

Jan. 13, 2022 EUR (€)

Dec. 09, 2021 EUR (€)

Sep. 16, 2021 EUR (€)

May 29, 2020

May 16, 2021 EUR (€)

Jun. 30, 2024 EUR (€)

Jun. 30, 2024 PLN (zł)

Dec. 31, 1999 shares

Dec. 31, 1994 child

Dec. 31, 2022 EUR (€) preliminaryRuling

Jun. 30, 2024 PLN (zł)

Jun. 27, 2024 EUR (€) instalment employee

Jun. 27, 2024 BRL (R$) instalment employee

Apr. 25, 2024 judge

Dec. 31, 2023 EUR (€)

Nov. 30, 2023 preliminaryRuling

Jul. 31, 2023 judgement

Jun. 29, 2023 EUR (€)

Jun. 29, 2023 GBP (£)

Apr. 30, 2023 preliminaryRuling

Dec. 02, 2022 GBP (£)

Jun. 01, 2022 judgement appeal

Dec. 31, 2017 EUR (€)

Disclosure of other provisions [line items]

PROVISIONS

€ 8,401,000

€ 8,441,000

Number of pilot cases | appeal

5

Number of judgements rendered on pilot cases appealed | judgement

3

4

Number of appellants who withdrew their appeal | judgement

1

Number of ruling requested by supreme court | preliminaryRuling

3

2

Number of ruling requested by first instance Court 3 of Santa Coloma de Farners | preliminaryRuling

3

Term for the filing of the indictment brief

40 days

Number of judges of the Supreme Court who declined to participate in the resolution | judge

9

Number of judges who submitted dissenting opinions | judge

6

Banco Popular Espanol S.A.

Disclosure of other provisions [line items]

Estimated cost of compensation to shareholders and bondholders

€ 680,000

Estimated cost of compensation to shareholders and bondholders applied to the commercial loyalty program

€ 535,000

Santander Bank Polska and Santander Consumer Bank Poland

Disclosure of other provisions [line items]

Mortgage loans denominated in, or indexed to, CHF

1,332,200

zł 5,739.4

Reimbursement liability from standstill agreement termination

Disclosure of other provisions [line items]

PROVISIONS

€ 651,300

£ 552

£ 670

Delforca case to request Court judgment on the validity of the swaps

Disclosure of other provisions [line items]

Arbitration matter, amount claimed by entity

66,000

Arbitration matter, amount claimed by counterparty

57,000

Arbitration matter, amount to be received by entity

€ 66,000

Arbitration matter, interest to be received by entity

€ 11,000

Planos Economicos

Disclosure of other provisions [line items]

Period of suspension of economic plan processes

5 years

Planos Economicos | Banco Santander Brasil SA

Disclosure of other provisions [line items]

PROVISIONS

175,800

Floor clauses

Disclosure of other provisions [line items]

PROVISIONS

53,670

Banco Popular's acquisition

Disclosure of other provisions [line items]

Number of judgements rendered on pilot cases | judgement

5

Individual plaintiff, CEO functions

Disclosure of other provisions [line items]

PROVISIONS

€ 35,500

Compensation sought in litigation claim

€ 112,000

€ 61,900

Losses on litigation settlements

€ 51,400

€ 67,800

Litigation contingencies, decrease in losses on litigation settlements

€ 8,000

Gains on litigation settlements

€ 9,600

Individual plaintiff, CEO functions | Share Based Variable Remuneration Award 2018

Disclosure of other provisions [line items]

Variable remuneration, deferred payment, long-term metric achievement, percentage

33.30%

33.30%

Breach of marketing alliance agreement

Disclosure of other provisions [line items]

Compensation sought in litigation claim

€ 1,050,000

Conversion of active loans from Swiss Francs to PLN Loans | Santander Bank Polska and Santander Consumer Bank Poland

Disclosure of other provisions [line items]

Mortgage loans, provision and adjustment to gross carrying amount

1,349,800

5,815.2

Mortgage loans, adjustment to gross carrying amount

1,059,700

4,565.5

Increase in adjustment to gross carrying amount, mortgage loans

184,000

zł 794.4

Increase through other costs associated

55,400

239.3

Conversion of active loans from Swiss Francs to PLN Loans | Santander Bank Polska and Santander Consumer Bank Poland | Active loans, under IAS 37

Disclosure of other provisions [line items]

PROVISIONS

290,100

zł 1,249.8

Increase in existing provisions

118,600

zł 511.8

Inheritance trust | Banco Santander Mexico S.A. Institucion De Banca Multiple, Grupo Financiero Santander Mexico

Disclosure of other provisions [line items]

Number of sons involved in testamentary trust | child

4

Amount of shares to be transferred by trustee | shares

36,700,000

Number of magistrates requested to be withdrawed | magistrate

2

Number of magistrates | magistrate

3

Financing terms, bonds issue | URO Property Holdings SOCIMI SA

Disclosure of other provisions [line items]

Legal proceedings, maximum loss

€ 250,000

Contingent liability arising from post-employment benefit obligations [member] | Banco do Estado de São Paulo S.A., Santander Banespa, Cia. de Arrendamiento Mercantil

Disclosure of other provisions [line items]

Number of retirees claiming payment of semi-annual bonus | employee

7,299

7,299

Estimated financial effect of contingent liabilities

€ 454,300

R$ 2.7

Number of instalments | instalment

5

5

Equity - Capital (Details)

Equity - Capital (Details) - EUR (€)			6 Months Ended
	Jun. 26, 2024	Jan. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of classes of share capital [line items]
Nominal amount			€ 7,747,000,000		€ 8,092,000,000
Number of shares outstanding (in shares)			15,494,273,572		16,184,146,059
Par value per share (in euro per share)			€ 0.50		€ 0.50
Reduction of issued capital			€ 93,000,000	€ 0
(-) Own shares
Disclosure of classes of share capital [line items]
Reduction of issued capital	€ 165,652,500	€ 179,283,744	€ (2,769,000,000)	€ (1,900,000,000)
Redemption of treasury shares (in shares)	331,305,000	358,567,487

Equity - Share premium (Details

Equity - Share premium (Details) € in Millions	6 Months Ended
	Jun. 30, 2024 EUR (€)
Redemption of treasury shares, purchase value	€ 2,769
Redemption of treasury shares, par value	345
Share premium
Increase (decrease) in equity	€ (2,424)

Equity - Schedule of other comp

Equity - Schedule of other comprehensive income components (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Equity [abstract]
OTHER COMPREHENSIVE INCOME (LOSS)	€ (36,963)	€ (35,020)
Items not reclassified to profit or loss	(5,118)	(5,212)
Actuarial gains or losses on defined benefit pension plans	(4,234)	(4,324)
Non-current assets held for sale	0	0
Share in other income and expenses recognised in investments, joint ventures and associates	(3)	1
Other valuation adjustments	0	0
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income	(705)	(776)
Inefficacy of fair value hedges of equity instruments measured at fair value with changes in other comprehensive income	0	0
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedged item)	268	264
Changes in the fair value of equity instruments measured at fair value with changes in other comprehensive income (hedging instrument)	(268)	(264)
Changes in the fair value of financial liabilities measured at fair value through profit or loss attributable to changes in credit risk	(176)	(113)
Items that may be reclassified to profit or loss	(31,845)	(29,808)
Hedge of net investments in foreign operations (effective portion)	(8,583)	(8,684)
Exchange differences	(21,187)	(19,510)
Hedging derivatives (effective portion)	(966)	(740)
Changes in the fair value of debt instruments measured at fair value with changes in other comprehensive income	(733)	(555)
Hedging instruments (items not designated)	0	0
Non-current assets held for sale	0	0
Share in other income and expenses recognised in investments, joint ventures and associates	€ (376)	€ (319)

Equity - Other comprehensive in

Equity - Other comprehensive income, items not reclassified to profit or loss - Actuarial gains or losses on defined benefit benefit pension plans (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Items not reclassified to profit or loss
Decrease (increase) in actuarial losses	€ (59)
Increase (decrease) in net defined benefit liability (asset) resulting from miscellaneous other changes	(12)
UK
Items not reclassified to profit or loss
Decrease (increase) in accumulated actuarial losses/profits	€ 187
Discount rates	5.15%	4.63%
Brazil
Items not reclassified to profit or loss
Decrease (increase) in accumulated actuarial losses/profits	€ (63)
Actuarial assumption of expected rates of pension increases	9.57%	8.65%
Actuarial assumption of medical cost trend rates	9.56%	8.70%
MEXICO
Items not reclassified to profit or loss
Decrease (increase) in accumulated actuarial losses/profits	€ (43)
Discount rates	10.25%	9.25%
Germany
Items not reclassified to profit or loss
Decrease (increase) in accumulated actuarial losses/profits	€ (10)
Discount rates	3.74%	3.57%

Equity - Schedule of changes in

Equity - Schedule of changes in fair value of equity instruments that will not be reclassified (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Items not reclassified to profit or loss
Net revaluation gains/(losses)	€ (705)	€ (776)
Fair value	82,270	83,308
Equity instruments
Items not reclassified to profit or loss
Revaluation gains	692	535
Revaluation losses	(1,397)	(1,311)
Net revaluation gains/(losses)	(705)	(776)
Fair value	1,842	1,761
Domestic | Spain
Items not reclassified to profit or loss
Revaluation gains	33	32
Revaluation losses	(1,325)	(1,173)
Net revaluation gains/(losses)	(1,292)	(1,141)
Fair value	106	252
International | Rest of Europe
Items not reclassified to profit or loss
Revaluation gains	123	117
Revaluation losses	(71)	(71)
Net revaluation gains/(losses)	52	46
Fair value	284	267
International | United States
Items not reclassified to profit or loss
Revaluation gains	17	16
Revaluation losses	0	0
Net revaluation gains/(losses)	17	16
Fair value	19	19
International | Latin America and rest
Items not reclassified to profit or loss
Revaluation gains	519	370
Revaluation losses	(1)	(67)
Net revaluation gains/(losses)	518	303
Fair value	1,433	1,223
Listed
Items not reclassified to profit or loss
Revaluation gains	472	316
Revaluation losses	(49)	(118)
Net revaluation gains/(losses)	423	198
Fair value	1,462	1,225
Unlisted
Items not reclassified to profit or loss
Revaluation gains	220	219
Revaluation losses	(1,348)	(1,193)
Net revaluation gains/(losses)	(1,128)	(974)
Fair value	€ 380	€ 536

Equity - Other comprehensive _2

Equity - Other comprehensive income, items that may be reclassified to profit or loss – Hedges of net investments in foreign operations and exchange differences (Details) € in Millions	6 Months Ended
	Jun. 30, 2024 EUR (€)
Equity [abstract]
Increase (decrease) in goodwill due to exchange differences and other items	€ (335)

Equity - Schedule of other co_2

Equity - Schedule of other comprehensive income, that may be reclassified to profit or loss, by type of instrument and geographical origin of the issuer (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Financial assets at fair value through other comprehensive income [abstract]
Net revaluation gains/(losses)	€ (733)	€ (555)
Fair value	82,270	83,308
Debt instruments
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	534	667
Revaluation losses	(1,267)	(1,222)
Net revaluation gains/(losses)	(733)	(555)
Fair value	80,428	81,547
Issued by public Public-sector | Spain
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	102	17
Revaluation losses	(1)	0
Net revaluation gains/(losses)	101	17
Fair value	10,136	9,867
Issued by public Public-sector | Rest of Europe
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	257	333
Revaluation losses	(82)	(96)
Net revaluation gains/(losses)	175	237
Fair value	14,850	18,258
Issued by public Public-sector | Latin America and rest of the world
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	69	194
Revaluation losses	(873)	(820)
Net revaluation gains/(losses)	(804)	(626)
Fair value	37,838	38,169
Issued by Private-sector | Spain
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	73	98
Revaluation losses	(13)	(9)
Net revaluation gains/(losses)	60	89
Fair value	6,366	5,129
Issued by Private-sector | Rest of Europe
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	21	19
Revaluation losses	(30)	(30)
Net revaluation gains/(losses)	(9)	(11)
Fair value	5,776	5,018
Issued by Private-sector | Latin America and rest of the world
Financial assets at fair value through other comprehensive income [abstract]
Revaluation gains	12	6
Revaluation losses	(268)	(267)
Net revaluation gains/(losses)	(256)	(261)
Fair value	€ 5,462	€ 5,106

Equity - Other comprehensive _3

Equity - Other comprehensive income, items that may be reclassified to profit or loss – Changes in the fair value of debt instruments measured at fair value through other comprehensive income (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Items not reclassified to profit or loss
Financial assets at amortised cost	€ 1,217,341	€ 1,191,403
Debt instruments
Items not reclassified to profit or loss
Financial assets at amortised cost	€ 114,347	€ 103,559

Segment information (Primary _3

Segment information (Primary segment) - Disclosure of reconciliation between adjusted profit and statutory profit (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating segments
Total income	€ 30,715	€ 28,010
Profit before taxes	9,508	8,090
Profit	6,059	5,241
Underlying Profit
Operating segments
Total income	31,050	28,234
Profit before taxes	9,508	8,329
Profit	6,059	5,241
Adjustments
Operating segments
Total income	(335)	(224)
Profit before taxes	0	(239)
Profit	0	0
Retail & Commercial Banking | Underlying Profit
Operating segments
Total income	16,274	14,392
Profit before taxes	5,187	3,638
Profit	3,326	2,421
Digital Consumer Bank | Underlying Profit
Operating segments
Total income	6,449	6,026
Profit before taxes	1,341	1,504
Profit	1,070	1,027
Corporate & Investment Banking | Underlying Profit
Operating segments
Total income	4,188	3,956
Profit before taxes	2,151	2,305
Profit	1,405	1,478
Wealth Management & Insurance | Underlying Profit
Operating segments
Total income	1,789	1,589
Profit before taxes	1,130	985
Profit	818	711
Payments | Underlying Profit
Operating segments
Total income	2,701	2,613
Profit before taxes	306	498
Profit	49	223
Corporate Center | Underlying Profit
Operating segments
Total income	(350)	(342)
Profit before taxes	(606)	(601)
Profit	€ (609)	€ (620)

Segment information (Primary _4

Segment information (Primary segment) - Narrative (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating segments
Restructuring costs	€ (1,762)	€ (1,330)

Related parties (Details)

Related parties (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Expenses
Finance costs	€ 77	€ 79
Leases	0	0
Services received	0	0
Purchases of stocks	0	0
Other expenses	97	57
Total expenses	174	136
Income
Finance income	253	191
Dividends received	0	0
Services rendered	0	0
Sale of stocks	0	0
Other income	799	710
Total income	1,052	901
Debt balances:
Customers and commercial debtors	0
Loans and credits granted	10,287		€ 9,877
Other collection rights	704		818
Debit balances	10,991		10,695
Credit balances:
Suppliers and creditors granted	0		0
Loans and credits received	2,985		2,359
Other payment obligations	304		290
Credit balances	3,289		2,649
Other transactions
Other transactions
Financing agreements: loans and capital contributions (lender)	413	179
Financing agreements: loans and capital contributions (borrower)	627	(22)
Guarantees provided	(283)	680
Guarantees received	0	0
Commitments acquired	46	54
Dividends and other distributed profit	19	11
Other transactions	(127)	36
Significant shareholders
Expenses
Finance costs	0	0
Leases	0	0
Services received	0	0
Purchases of stocks	0	0
Other expenses	0	0
Total expenses	0	0
Income
Finance income	0	0
Dividends received	0	0
Services rendered	0	0
Sale of stocks	0	0
Other income	0	0
Total income	0	0
Debt balances:
Customers and commercial debtors	0
Loans and credits granted	0		0
Other collection rights	0		0
Debit balances	0		0
Credit balances:
Suppliers and creditors granted	0		0
Loans and credits received	0		0
Other payment obligations	0		0
Credit balances	0		0
Significant shareholders | Other transactions
Other transactions
Financing agreements: loans and capital contributions (lender)	0	0
Financing agreements: loans and capital contributions (borrower)	0	0
Guarantees provided	0	0
Guarantees received	0	0
Commitments acquired	0	0
Dividends and other distributed profit	0	0
Other transactions	0	0
Directors and executives
Expenses
Finance costs	0	0
Leases	0	0
Services received	0	0
Purchases of stocks	0	0
Other expenses	0	0
Total expenses	0	0
Income
Finance income	0	0
Dividends received	0	0
Services rendered	0	0
Sale of stocks	0	0
Other income	0	0
Total income	0	0
Debt balances:
Customers and commercial debtors	0
Loans and credits granted	10		12
Other collection rights	0		0
Debit balances	10		12
Credit balances:
Suppliers and creditors granted	0		0
Loans and credits received	16		19
Other payment obligations	0		0
Credit balances	16		19
Directors and executives | Other transactions
Other transactions
Financing agreements: loans and capital contributions (lender)	0	2
Financing agreements: loans and capital contributions (borrower)	(2)	0
Guarantees provided	0	0
Guarantees received	0	0
Commitments acquired	0	0
Dividends and other distributed profit	2	1
Other transactions	0	0
Group companies or entities
Expenses
Finance costs	75	79
Leases	0	0
Services received	0	0
Purchases of stocks	0	0
Other expenses	97	57
Total expenses	172	136
Income
Finance income	249	188
Dividends received	0	0
Services rendered	0	0
Sale of stocks	0	0
Other income	798	709
Total income	1,047	897
Debt balances:
Customers and commercial debtors	0
Loans and credits granted	10,043		9,680
Other collection rights	704		817
Debit balances	10,747		10,497
Credit balances:
Suppliers and creditors granted	0		0
Loans and credits received	2,735		2,190
Other payment obligations	304		290
Credit balances	3,039		2,480
Group companies or entities | Other transactions
Other transactions
Financing agreements: loans and capital contributions (lender)	363	376
Financing agreements: loans and capital contributions (borrower)	545	(29)
Guarantees provided	8	0
Guarantees received	0	0
Commitments acquired	44	51
Dividends and other distributed profit	0	0
Other transactions	(127)	36
Other related parties
Expenses
Finance costs	2	0
Leases	0	0
Services received	0	0
Purchases of stocks	0	0
Other expenses	0	0
Total expenses	2	0
Income
Finance income	4	3
Dividends received	0	0
Services rendered	0	0
Sale of stocks	0	0
Other income	1	1
Total income	5	4
Debt balances:
Customers and commercial debtors	0
Loans and credits granted	234		185
Other collection rights	0		1
Debit balances	234		186
Credit balances:
Suppliers and creditors granted	0		0
Loans and credits received	234		150
Other payment obligations	0		0
Credit balances	234		€ 150
Other related parties | Other transactions
Other transactions
Financing agreements: loans and capital contributions (lender)	50	(199)
Financing agreements: loans and capital contributions (borrower)	84	7
Guarantees provided	(291)	680
Guarantees received	0	0
Commitments acquired	2	3
Dividends and other distributed profit	17	10
Other transactions	€ 0	€ 0

Off-balance-sheet exposures - S

Off-balance-sheet exposures - Schedule of contingent commitments (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Loan commitments granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	€ 290,151	€ 279,589
Financial guarantees granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	15,598	15,435
Bank sureties
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	15,561	15,400
Credit derivatives sold
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	37	35
Other commitments granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	127,420	113,273
Other granted guarantees
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	57,519	57,363
Other
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	69,901	55,910
Impaired assets | Loan commitments granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	488	406
Impaired assets | Financial guarantees granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	497	578
Impaired assets | Other commitments granted
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	€ 486	€ 542

Off-balance-sheet exposures - N

Off-balance-sheet exposures - Narrative (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Other assets | Next 12 months
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	€ 413,251	€ 398,243
Other assets | Next 12 months | Contingent liabilities and commitments
Disclosure of contingent liabilities [line items]
Other provisions	274	302
Other assets | Lifetime expected credit losses
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	18,447	8,528
Other assets | Lifetime expected credit losses | Contingent liabilities and commitments
Disclosure of contingent liabilities [line items]
Other provisions	210	174
Impaired assets | Lifetime expected credit losses
Disclosure of contingent liabilities [line items]
Exposure to credit risk on loan commitments	1,471	1,526
Impaired assets | Lifetime expected credit losses | Contingent liabilities and commitments
Disclosure of contingent liabilities [line items]
Other provisions	€ 214	€ 226

Average headcount and number _3

Average headcount and number of branches - Schedule of average number of employees (Details) - employee	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Number of employees
Men	99,865	97,353
Women	111,011	112,663
Average number of employees	210,876	210,016
Bank
Number of employees
Men	12,246	12,260
Women	11,734	11,732
Average number of employees	23,980	23,992

Average headcount and number _4

Average headcount and number of branches - Schedule of number of branches (Details) - office	Jun. 30, 2024	Dec. 31, 2023
Disclosure of geographical areas [line items]
Number of offices	8,285	8,518
Spain
Disclosure of geographical areas [line items]
Number of offices	1,883	1,924
Group
Disclosure of geographical areas [line items]
Number of offices	6,402	6,594

Other disclosures - Summary of

Other disclosures - Summary of fair values of financial assets and liabilities (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [line items]
Financial assets held for trading	€ 206,874	€ 176,921
Non-trading financial assets mandatorily at fair value through profit or loss	6,166	5,910
Financial assets designated at fair value through profit or loss	9,169	9,773
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	82,270	83,308
Hedging derivatives (assets)	5,413	5,297
Financial liabilities held for trading	133,856	122,270
Financial liabilities designated at fair value through profit or loss	34,493	40,367
Derivative financial liabilities held for hedging	5,535	7,656
Liabilities under insurance contracts	17,592	17,799
Published price quotations in active markets (Level 1)
Disclosure of detailed information about financial instruments [line items]
Financial assets held for trading	77,854	67,842
Non-trading financial assets mandatorily at fair value through profit or loss	2,014	1,765
Financial assets designated at fair value through profit or loss	2,494	2,746
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	63,114	64,631
Financial liabilities held for trading	24,028	20,298
Financial liabilities designated at fair value through profit or loss	0	25
Internal models (Levels 2 and 3)
Disclosure of detailed information about financial instruments [line items]
Financial assets held for trading	129,020	109,079
Non-trading financial assets mandatorily at fair value through profit or loss	4,152	4,145
Financial assets designated at fair value through profit or loss	6,675	7,027
FINANCIAL ASSETS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME	19,156	18,677
Hedging derivatives (assets)	5,413	5,297
Financial liabilities held for trading	109,828	101,972
Financial liabilities designated at fair value through profit or loss	34,493	40,342
Derivative financial liabilities held for hedging	5,535	7,656
Liabilities under insurance contracts	€ 17,592	€ 17,799

Other disclosures - Valuation t

Other disclosures - Valuation techniques for financial assets and liabilities (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disclosure of detailed information about financial instruments [line items]
Amount of CVA	€ 274
Change in CVA (as a percent)	(6.50%)
Amount of DVA	€ 265
Change in DVA (as a percent)	19.70%
Level 3
Disclosure of detailed information about financial instruments [line items]
Gains (losses) recognised in profit or loss	€ 160	€ 178

Other disclosures - Schedule of

Other disclosures - Schedule of financial instruments at fair value whose measurement was based on internal models (Levels 2 and 3) (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	€ 1,433	€ 1,227
Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	153,221	133,874
Financial liabilities, at fair value	166,015	166,542
Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	11,195	10,351	€ 9,988	€ 8,290
Financial liabilities, at fair value	1,433	1,227	820	925
Financial liabilities held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	802	869	402	415
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	802	869	402	415
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	304	388	133	235
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	0	8	0	0
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	65	139	22	19
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	222	187	63	42
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	211	147	184	119
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	352	29	0	151
Liabilities under insurance contracts | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	274	323	365	345
Financial assets held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,043	2,086	1,040	383
Financial assets held for trading | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	307	24
Financial assets held for trading | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,201	1,147	481	340
Financial assets held for trading | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	799	577	217	139
Financial assets held for trading | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8	9	3	4
Financial assets held for trading | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	30	153	29	39
Financial assets held for trading | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	196	235	85	48
Financial assets held for trading | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	168	173	147	110
Financial assets held for trading | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1	1	1	1
Financial assets held for trading | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	534	914	413	42
Non-trading financial assets mandatorily at fair value through profit or loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,095	2,095	1,912	1,833
Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	132	287	228	239
Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,719	1,495	1,347	1,269
Non-trading financial assets mandatorily at fair value through profit or loss | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	244	313	337	325
Financial assets at fair value through profit and loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	709	181	417	427
Financial assets at fair value through profit and loss | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	224	31	5	5
Financial assets at fair value through profit and loss | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	485	150	412	422
Financial assets at fair value through other comprehensive income | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	6,348	5,989	6,618	5,647
Financial assets at fair value through other comprehensive income | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	5,316	4,938	5,859	4,718
Financial assets at fair value through other comprehensive income | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	355	492	496	700
Financial assets at fair value through other comprehensive income | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	677	559	€ 263	€ 229
Financial assets and liabilities, category | Financial liabilities held for trading | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	109,026	101,103
Financial assets and liabilities, category | Financial liabilities held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	802	869
Financial assets and liabilities, category | Financial liabilities held for trading | Central Banks | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	11,056	7,808
Financial assets and liabilities, category | Financial liabilities held for trading | Central Banks | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | Financial liabilities held for trading | Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	17,156	17,862
Financial assets and liabilities, category | Financial liabilities held for trading | Credit institutions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | Financial liabilities held for trading | Loans and advances to customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	23,729	19,837
Financial assets and liabilities, category | Financial liabilities held for trading | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | 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	51,073	49,380
Financial assets and liabilities, category | 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	802	869
Financial assets and liabilities, category | 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	41,175	39,395
Financial assets and liabilities, category | 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	304	388
Financial assets and liabilities, category | 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	589	549
Financial assets and liabilities, category | 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	0	8
Financial assets and liabilities, category | 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	2,388	2,207
Financial assets and liabilities, category | 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	65	139
Financial assets and liabilities, category | 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	920	466
Financial assets and liabilities, category | 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	222	187
Financial assets and liabilities, category | 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	36	101
Financial assets and liabilities, category | Financial liabilities held for trading | Interest rate and equity futures | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | 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	5,965	6,662
Financial assets and liabilities, category | 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	211	147
Financial assets and liabilities, category | 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	6,012	6,216
Financial assets and liabilities, category | Financial liabilities held for trading | Short Positions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | Hedging derivatives | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	5,530	7,650
Financial assets and liabilities, category | Hedging derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	5	6
Financial assets and liabilities, category | Hedging derivatives | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	5,038	6,866
Financial assets and liabilities, category | Hedging derivatives | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	4	6
Financial assets and liabilities, category | Hedging derivatives | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	1	1
Financial assets and liabilities, category | Hedging derivatives | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	1	0
Financial assets and liabilities, category | Hedging derivatives | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	491	783
Financial assets and liabilities, category | Hedging derivatives | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	0	0
Financial assets and liabilities, category | 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	34,141	40,313
Financial assets and liabilities, category | 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	352	29
Financial assets and liabilities, category | Liabilities under insurance contracts | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	17,318	17,476
Financial assets and liabilities, category | Liabilities under insurance contracts | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial liabilities, at fair value	274	323
Financial assets and liabilities, category | Financial assets held for trading | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	126,977	106,993
Financial assets and liabilities, category | Financial assets held for trading | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,043	2,086
Financial assets and liabilities, category | Financial assets held for trading | Central Banks | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	17,283	17,717
Financial assets and liabilities, category | Financial assets held for trading | Central Banks | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Financial assets held for trading | Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	22,477	14,061
Financial assets and liabilities, category | Financial assets held for trading | Credit institutions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Financial assets held for trading | Loans and advances to customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	19,265	11,418
Financial assets and liabilities, category | Financial assets held for trading | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	307	24
Financial assets and liabilities, category | Financial assets held for trading | Debt instruments and equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	10,329	8,683
Financial assets and liabilities, category | Financial assets held for trading | Debt instruments and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	535	915
Financial assets and liabilities, category | Financial assets held for trading | Derivatives | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	57,623	55,114
Financial assets and liabilities, category | Financial assets held for trading | Derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,201	1,147
Financial assets and liabilities, category | Financial assets held for trading | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	45,459	44,987
Financial assets and liabilities, category | Financial assets held for trading | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	799	577
Financial assets and liabilities, category | Financial assets held for trading | Exchange rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	734	836
Financial assets and liabilities, category | Financial assets held for trading | Exchange rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8	9
Financial assets and liabilities, category | Financial assets held for trading | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,029	2,210
Financial assets and liabilities, category | Financial assets held for trading | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	30	153
Financial assets and liabilities, category | Financial assets held for trading | Interest rate futures | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,890	33
Financial assets and liabilities, category | Financial assets held for trading | Interest rate futures | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Financial assets held for trading | Index and securities options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	252	126
Financial assets and liabilities, category | Financial assets held for trading | Index and securities options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	196	235
Financial assets and liabilities, category | Financial assets held for trading | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	6,259	6,922
Financial assets and liabilities, category | Financial assets held for trading | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	168	173
Financial assets and liabilities, category | Hedging derivatives | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	5,413	5,297
Financial assets and liabilities, category | Hedging derivatives | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Hedging derivatives | Swaps | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	4,433	4,665
Financial assets and liabilities, category | Hedging derivatives | Swaps | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Hedging derivatives | Interest rate options | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	2
Financial assets and liabilities, category | Hedging derivatives | Interest rate options | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Hedging derivatives | Other | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	980	630
Financial assets and liabilities, category | Hedging derivatives | Other | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,057	2,050
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	2,095	2,095
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	708	815
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	1,719	1,495
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Debt instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	431	539
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	244	313
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	918	696
Financial assets and liabilities, category | Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	132	287
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	5,966	6,846
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	709	181
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Credit institutions | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	444	459
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Credit institutions | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	0	0
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Loans and advances to customers | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	5,327	6,189
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Loans and advances to customers | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	224	31
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Debt instruments and equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	195	198
Financial assets and liabilities, category | Financial assets at fair value through profit and loss | Debt instruments and equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	485	150
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	12,808	12,688
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	6,348	5,989
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Equity instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	4	5
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Equity instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	355	492
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Debt instruments | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	8,852	9,638
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Debt instruments | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	677	559
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Loans and advances | Level 2
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	3,952	3,045
Financial assets and liabilities, category | Financial assets at fair value through other comprehensive income | Loans and advances | Level 3
Measurement of financial assets and liabilities and recognition of fair value changes
Financial assets, at fair value	€ 5,316	€ 4,938

Other disclosures - Schedule _2

Other disclosures - Schedule of effect on fair value of financial instruments classified as Level 3 of a reasonable change in the assumptions used in the valuation (Details) € in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 EUR (€)	Dec. 31, 2023 EUR (€)
Discounted cash flow | Financial liabilities held for trading | Interest rate swap contract
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value liabilities due to changes in inputs	€ 4,170	€ 450
Increase in fair value of liabilities due to change in inputs	4,260	250
Discounted cash flow | Financial liabilities held for trading | Constant Maturity Swap (CMS)
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value liabilities due to changes in inputs		0
Increase in fair value of liabilities due to change in inputs		0
Local volatility | Financial liabilities held for trading | Caps/Floors
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value liabilities due to changes in inputs	40	450
Increase in fair value of liabilities due to change in inputs	40	250
Local volatility | Financial liabilities held for trading | Foreign Exchange Options
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value liabilities due to changes in inputs	440	450
Increase in fair value of liabilities due to change in inputs	210	130
Local volatility | Financial liabilities held for trading | Swaptions
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value liabilities due to changes in inputs	5,770	210
Increase in fair value of liabilities due to change in inputs	€ 1,390	€ 100
Minimum | Volatility | Discounted cash flow | Financial liabilities held for trading | Constant Maturity Swap (CMS)
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities		0.10
Minimum | Volatility | Local volatility | Financial liabilities held for trading | Caps/Floors
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.10	0.10
Minimum | Volatility | Local volatility | Financial liabilities held for trading | Foreign Exchange Options
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.10	0.10
Minimum | Volatility | Local volatility | Financial liabilities held for trading | Swaptions
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.0060	0.10
Minimum | Inflation Swap Rate | Discounted cash flow | Financial liabilities held for trading | Interest rate swap contract
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.10	0.10
Maximum | Volatility | Discounted cash flow | Financial liabilities held for trading | Constant Maturity Swap (CMS)
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities		0.90
Maximum | Volatility | Local volatility | Financial liabilities held for trading | Caps/Floors
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.90	0.90
Maximum | Volatility | Local volatility | Financial liabilities held for trading | Foreign Exchange Options
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.90	0.90
Maximum | Volatility | Local volatility | Financial liabilities held for trading | Swaptions
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.0114	0.90
Maximum | Inflation Swap Rate | Discounted cash flow | Financial liabilities held for trading | Interest rate swap contract
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.99	0.90
Weighted average | Volatility | Discounted cash flow | Financial liabilities held for trading | Constant Maturity Swap (CMS)
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities		0.4766
Weighted average | Volatility | Local volatility | Financial liabilities held for trading | Caps/Floors
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.5062	0.3903
Weighted average | Volatility | Local volatility | Financial liabilities held for trading | Foreign Exchange Options
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.3610	0.2809
Weighted average | Volatility | Local volatility | Financial liabilities held for trading | Swaptions
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.007047	0.3555
Weighted average | Inflation Swap Rate | Discounted cash flow | Financial liabilities held for trading | Interest rate swap contract
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, liabilities	0.5054	0.3903
Financial assets held for trading | Repos / Reverse Repos | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (70)	€ (80)
Increase in fair value of assets due to change in inputs	0	0
Financial assets held for trading | Corporate Debt | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(4,880)	(1,900)
Increase in fair value of assets due to change in inputs	€ 5,030	€ 1,900
Financial assets held for trading | Corporate Debt | Minimum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | Corporate Debt | Maximum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10	0.10
Financial assets held for trading | Corporate Debt | Weighted average | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0507	0.0501
Financial assets held for trading | Government debt | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (6,860)	€ (7,770)
Increase in fair value of assets due to change in inputs	€ 6,820	€ 7,720
Financial assets held for trading | Government debt | Minimum | Discount curve | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | Government debt | Maximum | Discount curve | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.08	0.08
Financial assets held for trading | Government debt | Weighted average | Discount curve | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0399	0.0399
Financial assets held for trading | Currency swap contract | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs		€ (900)
Increase in fair value of assets due to change in inputs		€ 1,030
Financial assets held for trading | Currency swap contract | Minimum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		(0.0006)
Financial assets held for trading | Currency swap contract | Maximum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.0006
Financial assets held for trading | Currency swap contract | Weighted average | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.000040
Financial assets held for trading | EQ Options | EQ Option Pricing Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (410)	€ (510)
Increase in fair value of assets due to change in inputs	630	890
Financial assets held for trading | EQ Options | Local Volatility Option Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(6,220)	(1,260)
Increase in fair value of assets due to change in inputs	€ 6,220	€ 1,260
Financial assets held for trading | EQ Options | Minimum | Volatility | EQ Option Pricing Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | EQ Options | Minimum | Volatility | Local Volatility Option Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10	0.10
Financial assets held for trading | EQ Options | Maximum | Volatility | EQ Option Pricing Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.70	0.70
Financial assets held for trading | EQ Options | Maximum | Volatility | Local Volatility Option Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.90	0.90
Financial assets held for trading | EQ Options | Weighted average | Volatility | EQ Option Pricing Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.4249	0.4439
Financial assets held for trading | EQ Options | Weighted average | Volatility | Local Volatility Option Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.5000	0.5000
Financial assets held for trading | Inflation Derivatives | Asset Swap Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (320)	€ (280)
Increase in fair value of assets due to change in inputs	€ 200	€ 160
Financial assets held for trading | Inflation Derivatives | Minimum | Inflation Swap Rate | Asset Swap Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.02	0.02
Financial assets held for trading | Inflation Derivatives | Maximum | Inflation Swap Rate | Asset Swap Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.08	0.08
Financial assets held for trading | Inflation Derivatives | Weighted average | Inflation Swap Rate | Asset Swap Model Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0435	0.0418
Financial assets held for trading | IR Options | Interest Rate Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (200)	€ (290)
Increase in fair value of assets due to change in inputs	€ 280	€ 410
Financial assets held for trading | IR Options | Minimum | Volatility | Interest Rate Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0.004
Financial assets held for trading | IR Options | Maximum | Volatility | Interest Rate Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.30	0.322
Financial assets held for trading | IR Options | Weighted average | Volatility | Interest Rate Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.1756	0.1886
Financial assets held for trading | Interest rate swap contract | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (2,870)	€ (30)
Increase in fair value of assets due to change in inputs	2,940	30
Financial assets held for trading | Interest rate swap contract | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(2,300)	(1,250)
Increase in fair value of assets due to change in inputs	0	0
Financial assets held for trading | Interest rate swap contract | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(1,710)	(1,970)
Increase in fair value of assets due to change in inputs	2,110	2,180
Financial assets held for trading | Interest rate swap contract | Discounted Cash Flows on swap rate
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(690)	(1,010)
Increase in fair value of assets due to change in inputs	920	950
Financial assets held for trading | Interest rate swap contract | Prepayment Modeling Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	0	(60)
Increase in fair value of assets due to change in inputs	€ 30	€ 50
Financial assets held for trading | Interest rate swap contract | Minimum | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.709	0.026
Financial assets held for trading | Interest rate swap contract | Minimum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0060	(0.00052)
Financial assets held for trading | Interest rate swap contract | Minimum | Swap rate | Discounted Cash Flows on swap rate
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.09	0.094
Financial assets held for trading | Interest rate swap contract | Minimum | Other Measurement Input | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.05	0.05
Financial assets held for trading | Interest rate swap contract | Minimum | Prepayment rate | Prepayment Modeling Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.025	0.025
Financial assets held for trading | Interest rate swap contract | Maximum | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	3.227	0.083
Financial assets held for trading | Interest rate swap contract | Maximum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0300	0.00052
Financial assets held for trading | Interest rate swap contract | Maximum | Swap rate | Discounted Cash Flows on swap rate
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10	0.098
Financial assets held for trading | Interest rate swap contract | Maximum | Prepayment rate | Prepayment Modeling Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.090	0.062
Financial assets held for trading | Interest rate swap contract | Weighted average | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	2.0979	0.0560
Financial assets held for trading | Interest rate swap contract | Weighted average | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.01815	0.000009
Financial assets held for trading | Interest rate swap contract | Weighted average | Swap rate | Discounted Cash Flows on swap rate
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0957	0.0960
Financial assets held for trading | Interest rate swap contract | Weighted average | Prepayment rate | Prepayment Modeling Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0900	0.0417
Financial assets held for trading | Property Derivatives | Option pricing model
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (3,780)	€ (3,920)
Increase in fair value of assets due to change in inputs	€ 3,780	€ 3,920
Financial assets held for trading | Property Derivatives | Minimum | Growth rate | Option pricing model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.06)	(0.05)
Financial assets held for trading | Property Derivatives | Maximum | Growth rate | Option pricing model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.05	0.05
Financial assets held for trading | Property Derivatives | Weighted average | Growth rate | Option pricing model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | Other Debt Securities | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (450)
Increase in fair value of assets due to change in inputs	€ 180
Financial assets held for trading | Other Debt Securities | Minimum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10
Financial assets held for trading | Other Debt Securities | Maximum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.90
Financial assets held for trading | Other Debt Securities | Weighted average | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.3353
Financial assets held for trading | Foreign Exchange Options | FX Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (530)	€ (550)
Increase in fair value of assets due to change in inputs	€ 570	€ 590
Financial assets held for trading | Foreign Exchange Options | Minimum | Volatility | FX Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | Foreign Exchange Options | Maximum | Volatility | FX Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.40	0.40
Financial assets held for trading | Foreign Exchange Options | Weighted average | Volatility | FX Option Pricing Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.2081	0.2081
Financial assets held for trading | Securitisation Swap | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (5,590)	€ (4,950)
Increase in fair value of assets due to change in inputs	€ 5,590	€ 4,950
Financial assets held for trading | Securitisation Swap | Minimum | Prepayment rate | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.252)	(0.2230)
Financial assets held for trading | Securitisation Swap | Maximum | Prepayment rate | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.308	0.2720
Financial assets held for trading | Securitisation Swap | Weighted average | Prepayment rate | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0280	0.0247
Financial assets held for trading | Structured Notes | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (1,530)	€ (1,530)
Increase in fair value of assets due to change in inputs	€ 1,530	€ 1,530
Financial assets held for trading | Structured Notes | Minimum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.10)	(0.10)
Financial assets held for trading | Structured Notes | Maximum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10	0.10
Financial assets held for trading | Structured Notes | Weighted average | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets held for trading | Credit Default Models | Credit Default Models
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs		€ (140)
Increase in fair value of assets due to change in inputs		€ 140
Financial assets held for trading | Credit Default Models | Minimum | Illiquid Credit Default Spread Curves | Credit Default Models
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.0100
Financial assets held for trading | Credit Default Models | Maximum | Illiquid Credit Default Spread Curves | Credit Default Models
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.0200
Financial assets held for trading | Credit Default Models | Weighted average | Illiquid Credit Default Spread Curves | Credit Default Models
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.014914
Financial assets held for trading | Caps/Floors | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (20)
Increase in fair value of assets due to change in inputs	€ 20
Financial assets held for trading | Caps/Floors | Minimum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.0002)
Financial assets held for trading | Caps/Floors | Maximum | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0002
Financial assets held for trading | Caps/Floors | Weighted average | Interest rate, measurement input | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.000002
Financial assets at fair value through profit and loss | Loans | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (190)	€ (210)
Increase in fair value of assets due to change in inputs	€ 190	€ 210
Financial assets at fair value through profit and loss | Loans | Minimum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.001	0.001
Financial assets at fair value through profit and loss | Loans | Maximum | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.02	0.03
Financial assets at fair value through profit and loss | Loans | Weighted average | Credit spread | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0105	0.0155
Financial assets at fair value through profit and loss | Mortgage Portfolio | Black Scholes Model
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (240)	€ (230)
Increase in fair value of assets due to change in inputs	€ 240	€ 230
Financial assets at fair value through profit and loss | Mortgage Portfolio | Minimum | Growth rate | Black Scholes Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.05)	(0.05)
Financial assets at fair value through profit and loss | Mortgage Portfolio | Maximum | Growth rate | Black Scholes Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.05	0.05
Financial assets at fair value through profit and loss | Mortgage Portfolio | Weighted average | Growth rate | Black Scholes Model
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets at fair value through profit and loss | Other Debt Securities | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (4,110)	€ (4,480)
Increase in fair value of assets due to change in inputs	€ 3,900	€ 4,250
Financial assets at fair value through profit and loss | Other Debt Securities | Minimum | Inflation Swap Rate | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets at fair value through profit and loss | Other Debt Securities | Maximum | Inflation Swap Rate | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.08	0.08
Financial assets at fair value through profit and loss | Other Debt Securities | Weighted average | Inflation Swap Rate | Other Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0389	0.0389
Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (171,920)	€ (149,490)
Increase in fair value of assets due to change in inputs	€ 171,920	€ 149,490
Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Minimum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.90	0.90
Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Maximum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	1.10	1.10
Non-trading financial assets mandatorily at fair value through profit or loss | Equity instruments | Weighted average | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	1	1
Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances to customers | Probability Weighting Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (350)	€ (350)
Increase in fair value of assets due to change in inputs	€ 350	€ 350
Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances to customers | Minimum | Growth rate | Probability Weighting Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.05)	(0.05)
Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances to customers | Maximum | Growth rate | Probability Weighting Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.05	0.05
Non-trading financial assets mandatorily at fair value through profit or loss | Loans and advances to customers | Weighted average | Growth rate | Probability Weighting Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets at fair value through other comprehensive income | Corporate Debt | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (90)	€ (90)
Increase in fair value of assets due to change in inputs	€ 90	€ 90
Financial assets at fair value through other comprehensive income | Corporate Debt | Minimum | Margin Of A Preference Portfolio, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.0001)
Financial assets at fair value through other comprehensive income | Corporate Debt | Minimum | Margin Of A Reference Portfolio | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		(0.01)
Financial assets at fair value through other comprehensive income | Corporate Debt | Maximum | Margin Of A Preference Portfolio, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0001
Financial assets at fair value through other comprehensive income | Corporate Debt | Maximum | Margin Of A Reference Portfolio | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0.01
Financial assets at fair value through other comprehensive income | Corporate Debt | Weighted average | Margin Of A Preference Portfolio, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0
Financial assets at fair value through other comprehensive income | Corporate Debt | Weighted average | Margin Of A Reference Portfolio | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets		0
Financial assets at fair value through other comprehensive income | Government debt | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ 0	€ 0
Increase in fair value of assets due to change in inputs	€ 0	€ 0
Financial assets at fair value through other comprehensive income | Government debt | Minimum | Interest rate, measurement input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.004	0
Financial assets at fair value through other comprehensive income | Government debt | Maximum | Interest rate, measurement input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.024	0.02
Financial assets at fair value through other comprehensive income | Government debt | Weighted average | Interest rate, measurement input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0142	0.0099
Financial assets at fair value through other comprehensive income | Loans | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (200)	€ (3,460)
Increase in fair value of assets due to change in inputs	0	0
Financial assets at fair value through other comprehensive income | Loans | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(19,500)	(20,800)
Increase in fair value of assets due to change in inputs	0	0
Financial assets at fair value through other comprehensive income | Loans | Discounted Cash Flows On Interest Rate Curve
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(570)	(680)
Increase in fair value of assets due to change in inputs	570	680
Financial assets at fair value through other comprehensive income | Loans | Discounted Cash Flows On Margin Of A Reference Portfolio
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(20,300)	(20,300)
Increase in fair value of assets due to change in inputs	20,300	20,300
Financial assets at fair value through other comprehensive income | Loans | Market comparable prices [member]
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	(2,780)	(5,020)
Increase in fair value of assets due to change in inputs	€ 1,390	€ 2,510
Financial assets at fair value through other comprehensive income | Loans | Minimum | Credit spread | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.01677	0.01677
Financial assets at fair value through other comprehensive income | Loans | Minimum | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.10
Financial assets at fair value through other comprehensive income | Loans | Minimum | Market Price, Measurement Input | Market comparable prices [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.10)	(0.10)
Financial assets at fair value through other comprehensive income | Loans | Minimum | Interest rate, measurement input | Discounted Cash Flows On Interest Rate Curve
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.045	0.046
Financial assets at fair value through other comprehensive income | Loans | Minimum | Margin Of A Preference Portfolio, Measurement Input | Discounted Cash Flows On Margin Of A Reference Portfolio
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	(0.0001)	(0.0001)
Financial assets at fair value through other comprehensive income | Loans | Maximum | Credit spread | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.03658	0.03658
Financial assets at fair value through other comprehensive income | Loans | Maximum | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.90
Financial assets at fair value through other comprehensive income | Loans | Maximum | Market Price, Measurement Input | Market comparable prices [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.20	0.20
Financial assets at fair value through other comprehensive income | Loans | Maximum | Interest rate, measurement input | Discounted Cash Flows On Interest Rate Curve
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.081	0.090
Financial assets at fair value through other comprehensive income | Loans | Maximum | Margin Of A Preference Portfolio, Measurement Input | Discounted Cash Flows On Margin Of A Reference Portfolio
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0001	0.0001
Financial assets at fair value through other comprehensive income | Loans | Weighted average | Credit spread | Forward Estimation Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.016774	167.74
Financial assets at fair value through other comprehensive income | Loans | Weighted average | Credit spread | Discounted Cash Flows on credit spread
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.1000
Financial assets at fair value through other comprehensive income | Loans | Weighted average | Market Price, Measurement Input | Market comparable prices [member]
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets at fair value through other comprehensive income | Loans | Weighted average | Interest rate, measurement input | Discounted Cash Flows On Interest Rate Curve
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0628	0.0680
Financial assets at fair value through other comprehensive income | Loans | Weighted average | Margin Of A Preference Portfolio, Measurement Input | Discounted Cash Flows On Margin Of A Reference Portfolio
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0	0
Financial assets at fair value through other comprehensive income | Equity instruments | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ (35,460)	€ (49,240)
Increase in fair value of assets due to change in inputs	€ 35,460	€ 49,240
Financial assets at fair value through other comprehensive income | Equity instruments | Minimum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.90	0.90
Financial assets at fair value through other comprehensive income | Equity instruments | Maximum | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	1.10	1.10
Financial assets at fair value through other comprehensive income | Equity instruments | Weighted average | Price, Measurement Input | Price Based Valuation Technique
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	1	1
Financial assets at fair value through other comprehensive income | Mortgage Letters | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Decrease in fair value assets due to changes in inputs	€ 130
Increase in fair value of assets due to change in inputs	€ 130
Financial assets at fair value through other comprehensive income | Mortgage Letters | Minimum | Mortgage Letters, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.059
Financial assets at fair value through other comprehensive income | Mortgage Letters | Maximum | Mortgage Letters, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.062
Financial assets at fair value through other comprehensive income | Mortgage Letters | Weighted average | Mortgage Letters, Measurement Input | Discounted cash flow
Disclosure of detailed information about financial instruments [line items]
Significant unobservable input, assets	0.0608

Other disclosures - Schedule _3

Other disclosures - Schedule of changes in financial instruments classified as Level 3 (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	€ 1,227
Purchases/Settlements	557
Sales/Amortisation	(143)
Changes in fair value recognized in profit or loss	(28)
Changes in fair value recognised in equity	0
Level reclassifications	(137)
Other	(43)
Financial liabilities, at fair value, period ending	1,433
Level 3
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	10,351	€ 8,290
Purchases/Settlements	4,520	4,558
Sales/Amortisation	(3,031)	(3,783)
Changes in fair value recognized in profit or loss	132	85
Changes in fair value recognised in equity	(123)	(222)
Level reclassifications		809
Level reclassifications	(551)
Other	(103)	251
Financial assets, at fair value, period ending	11,195	9,988
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	1,227	925
Purchases/Settlements		304
Sales/Amortisation		(106)
Changes in fair value recognized in profit or loss		(93)
Changes in fair value recognised in equity		0
Level reclassifications		(82)
Other		(128)
Financial liabilities, at fair value, period ending	1,433	820
Level 3 | Financial liabilities held for trading
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	869	415
Purchases/Settlements	293	304
Sales/Amortisation	(135)	(101)
Changes in fair value recognized in profit or loss	(46)	(91)
Changes in fair value recognised in equity	0	0
Level reclassifications	(166)	(118)
Other	(13)	(7)
Financial liabilities, at fair value, period ending	802	402
Level 3 | Financial liabilities held for trading | Derivatives
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	869	415
Purchases/Settlements	293	304
Sales/Amortisation	(135)	(101)
Changes in fair value recognized in profit or loss	(46)	(91)
Changes in fair value recognised in equity	0	0
Level reclassifications	(166)	(118)
Other	(13)	(7)
Financial liabilities, at fair value, period ending	802	402
Level 3 | Financial liabilities held for trading | Swaps
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	388	235
Purchases/Settlements	84	104
Sales/Amortisation	(23)	(70)
Changes in fair value recognized in profit or loss	(52)	(25)
Changes in fair value recognised in equity	0	0
Level reclassifications	(93)	(97)
Other	0	(14)
Financial liabilities, at fair value, period ending	304	133
Level 3 | Financial liabilities held for trading | Exchange rate options
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	8	0
Purchases/Settlements	0	24
Sales/Amortisation	(1)	(24)
Changes in fair value recognized in profit or loss	(4)	0
Changes in fair value recognised in equity	0	0
Level reclassifications	(2)
Level reclassifications		0
Other	(1)	0
Financial liabilities, at fair value, period ending	0	0
Level 3 | Financial liabilities held for trading | Interest rate options
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	139	19
Purchases/Settlements	1	7
Sales/Amortisation	(19)	(1)
Changes in fair value recognized in profit or loss	7	(3)
Changes in fair value recognised in equity	0	0
Level reclassifications	(64)
Level reclassifications		0
Other	1	0
Financial liabilities, at fair value, period ending	65	22
Level 3 | Financial liabilities held for trading | Index and securities options
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	187	42
Purchases/Settlements	1	38
Sales/Amortisation	(17)	(6)
Changes in fair value recognized in profit or loss	71	3
Changes in fair value recognised in equity	0	0
Level reclassifications	(7)	(21)
Other	(13)	7
Financial liabilities, at fair value, period ending	222	63
Level 3 | Financial liabilities held for trading | Other Derivatives
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	147	119
Purchases/Settlements	207	131
Sales/Amortisation	(75)	0
Changes in fair value recognized in profit or loss	(68)	(66)
Changes in fair value recognised in equity	0	0
Level reclassifications	0
Level reclassifications		0
Other	0	0
Financial liabilities, at fair value, period ending	211	184
Level 3 | Hedging instruments [member]
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	6	14
Purchases/Settlements	0	0
Sales/Amortisation	0	0
Changes in fair value recognized in profit or loss	(1)	3
Changes in fair value recognised in equity	0	0
Level reclassifications	0
Level reclassifications		36
Other	0	0
Financial liabilities, at fair value, period ending	5	53
Level 3 | Hedging instruments [member] | Swaps
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	6	14
Purchases/Settlements	0	0
Sales/Amortisation	0	0
Changes in fair value recognized in profit or loss	(2)	3
Changes in fair value recognised in equity	0	0
Level reclassifications	0
Level reclassifications		36
Other	0	0
Financial liabilities, at fair value, period ending	4	53
Level 3 | Hedging instruments [member] | Interest rate options
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	0
Purchases/Settlements	0
Sales/Amortisation	0
Changes in fair value recognized in profit or loss	1
Changes in fair value recognised in equity	0
Level reclassifications	0
Other	0
Financial liabilities, at fair value, period ending	1
Level 3 | Financial liabilities designated at fair value through profit or loss
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	29	151
Purchases/Settlements	264	0
Sales/Amortisation	(8)	(5)
Changes in fair value recognized in profit or loss	38	1
Changes in fair value recognised in equity	0	0
Level reclassifications	29	0
Other	0	(147)
Financial liabilities, at fair value, period ending	352	0
Level 3 | Liabilities under insurance contracts
Changes in financial instruments, Liabilities
Financial liabilities, at fair value, beginning period	323	345
Purchases/Settlements	0	0
Sales/Amortisation	0	0
Changes in fair value recognized in profit or loss	(19)	(6)
Changes in fair value recognised in equity	0	0
Level reclassifications	0
Level reclassifications		0
Other	(30)	26
Financial liabilities, at fair value, period ending	274	365
Financial assets held for trading | Level 3
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	2,086	383
Purchases/Settlements	726	198
Sales/Amortisation	(194)	(72)
Changes in fair value recognized in profit or loss	33	77
Changes in fair value recognised in equity	0	0
Level reclassifications		303
Level reclassifications	(566)
Other	(42)	151
Financial assets, at fair value, period ending	2,043	1,040
Financial assets held for trading | Level 3 | Debt instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	914	42
Purchases/Settlements	84	52
Sales/Amortisation	(2)	(4)
Changes in fair value recognized in profit or loss	(18)	1
Changes in fair value recognised in equity	0	0
Level reclassifications		316
Level reclassifications	(428)
Other	(16)	6
Financial assets, at fair value, period ending	534	413
Financial assets held for trading | Level 3 | Equity instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	1	1
Purchases/Settlements	0	0
Sales/Amortisation	0	0
Changes in fair value recognized in profit or loss	0	0
Changes in fair value recognised in equity	0	0
Level reclassifications	0	0
Other	0	0
Financial assets, at fair value, period ending	1	1
Financial assets held for trading | Level 3 | Derivatives
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	1,147	340
Purchases/Settlements	367	146
Sales/Amortisation	(168)	(68)
Changes in fair value recognized in profit or loss	49	77
Changes in fair value recognised in equity	0	0
Level reclassifications	(168)	(13)
Other	(26)	(1)
Financial assets, at fair value, period ending	1,201	481
Financial assets held for trading | Level 3 | Swaps
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	577	139
Purchases/Settlements	281	0
Sales/Amortisation	(94)	(3)
Changes in fair value recognized in profit or loss	(3)	93
Changes in fair value recognised in equity	0	0
Level reclassifications	38
Level reclassifications		0
Other	0	(12)
Financial assets, at fair value, period ending	799	217
Financial assets held for trading | Level 3 | Exchange rate options
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	9	4
Purchases/Settlements	0	0
Sales/Amortisation	(1)	0
Changes in fair value recognized in profit or loss	3	(1)
Changes in fair value recognised in equity	0	0
Level reclassifications	(2)	0
Other	(1)	0
Financial assets, at fair value, period ending	8	3
Financial assets held for trading | Level 3 | Interest rate options
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	153	39
Purchases/Settlements	0	0
Sales/Amortisation	0	0
Changes in fair value recognized in profit or loss	(16)	(10)
Changes in fair value recognised in equity	0	0
Level reclassifications	(107)	0
Other	0	0
Financial assets, at fair value, period ending	30	29
Financial assets held for trading | Level 3 | Index and securities options
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	235	48
Purchases/Settlements	11	52
Sales/Amortisation	(47)	0
Changes in fair value recognized in profit or loss	79	3
Changes in fair value recognised in equity	0	0
Level reclassifications	(66)	(23)
Other	(16)	5
Financial assets, at fair value, period ending	196	85
Financial assets held for trading | Level 3 | Other Derivatives
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	173	110
Purchases/Settlements	75	94
Sales/Amortisation	(26)	(65)
Changes in fair value recognized in profit or loss	(14)	(8)
Changes in fair value recognised in equity	0	0
Level reclassifications		10
Level reclassifications	(31)
Other	(9)	6
Financial assets, at fair value, period ending	168	147
Financial assets held for trading | Level 3 | Loans and advances to customers
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	24
Purchases/Settlements	275
Sales/Amortisation	(24)
Changes in fair value recognized in profit or loss	2
Changes in fair value recognised in equity	0
Level reclassifications	30
Other	0
Financial assets, at fair value, period ending	307
Financial assets at fair value through profit and loss | Level 3
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	181	427
Purchases/Settlements	593	0
Sales/Amortisation	(126)	0
Changes in fair value recognized in profit or loss	28	(40)
Changes in fair value recognised in equity	0	0
Level reclassifications	61
Level reclassifications		0
Other	(28)	30
Financial assets, at fair value, period ending	709	417
Financial assets at fair value through profit and loss | Level 3 | Debt instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	150	422
Purchases/Settlements	405	0
Sales/Amortisation	(123)	0
Changes in fair value recognized in profit or loss	36	(40)
Changes in fair value recognised in equity	0	0
Level reclassifications	61
Level reclassifications		0
Other	(44)	30
Financial assets, at fair value, period ending	485	412
Financial assets at fair value through profit and loss | Level 3 | Loans and advances to customers
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	31	5
Purchases/Settlements	188	0
Sales/Amortisation	(3)	0
Changes in fair value recognized in profit or loss	(8)	0
Changes in fair value recognised in equity	0	0
Level reclassifications	0	0
Other	16	0
Financial assets, at fair value, period ending	224	5
Non-trading financial assets mandatorily at fair value through profit or loss | Level 3
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	2,095	1,833
Purchases/Settlements	167	163
Sales/Amortisation	(189)	(116)
Changes in fair value recognized in profit or loss	71	48
Changes in fair value recognised in equity	0	0
Level reclassifications	(69)	0
Other	20	(16)
Financial assets, at fair value, period ending	2,095	1,912
Non-trading financial assets mandatorily at fair value through profit or loss | Level 3 | Debt instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	313	325
Purchases/Settlements	5	32
Sales/Amortisation	(73)	(25)
Changes in fair value recognized in profit or loss	2	3
Changes in fair value recognised in equity	0	0
Level reclassifications	0	0
Other	(3)	2
Financial assets, at fair value, period ending	244	337
Non-trading financial assets mandatorily at fair value through profit or loss | Level 3 | Equity instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	1,495	1,269
Purchases/Settlements	119	72
Sales/Amortisation	(19)	(28)
Changes in fair value recognized in profit or loss	24	61
Changes in fair value recognised in equity	0	0
Level reclassifications	71
Level reclassifications		0
Other	29	(27)
Financial assets, at fair value, period ending	1,719	1,347
Non-trading financial assets mandatorily at fair value through profit or loss | Level 3 | Loans and advances to customers
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	287	239
Purchases/Settlements	43	59
Sales/Amortisation	(97)	(63)
Changes in fair value recognized in profit or loss	45	(16)
Changes in fair value recognised in equity	0	0
Level reclassifications	(140)	0
Other	(6)	9
Financial assets, at fair value, period ending	132	228
Financial assets at fair value through other comprehensive income | Level 3
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	5,989	5,647
Purchases/Settlements	3,034	4,197
Sales/Amortisation	(2,522)	(3,595)
Changes in fair value recognized in profit or loss	0	0
Changes in fair value recognised in equity	(123)	(222)
Level reclassifications	23	505
Other	(53)	86
Financial assets, at fair value, period ending	6,348	6,618
Financial assets at fair value through other comprehensive income | Level 3 | Debt instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	559	229
Purchases/Settlements	186	0
Sales/Amortisation	(2)	(3)
Changes in fair value recognized in profit or loss	0	0
Changes in fair value recognised in equity	(17)	(1)
Level reclassifications	7	32
Other	(56)	6
Financial assets, at fair value, period ending	677	263
Financial assets at fair value through other comprehensive income | Level 3 | Equity instruments
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	492	700
Purchases/Settlements	3	1
Sales/Amortisation	(15)	(2)
Changes in fair value recognized in profit or loss	0	0
Changes in fair value recognised in equity	(126)	(244)
Level reclassifications	0	0
Other	1	41
Financial assets, at fair value, period ending	355	496
Financial assets at fair value through other comprehensive income | Level 3 | Loans and advances to customers
Changes in financial instruments, Assets
Financial assets, at fair value, beginning period	4,938	4,718
Purchases/Settlements	2,845	4,196
Sales/Amortisation	(2,505)	(3,590)
Changes in fair value recognized in profit or loss	0	0
Changes in fair value recognised in equity	20	23
Level reclassifications	16	473
Other	2	39
Financial assets, at fair value, period ending	€ 5,316	€ 5,859

Other disclosures - Schedule _4

Other disclosures - Schedule of forborne loans (Details) - Credit risk € in Millions	Jun. 30, 2024 EUR (€) contract	Dec. 31, 2023 EUR (€) contract
Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	4,412,983	5,142,331
Forborne loan portfolio | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	536,487	569,358
Forborne loan portfolio | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 8,544	€ 8,721
Forborne loan portfolio | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 5,443	€ 5,686
Forborne loan portfolio | Credit entities | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Forborne loan portfolio | Credit entities | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Forborne loan portfolio | Credit entities | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Forborne loan portfolio | Credit entities | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Forborne loan portfolio | Public sector | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	13,541	12,851
Forborne loan portfolio | Public sector | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	49	37
Forborne loan portfolio | Public sector | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 2	€ 2
Forborne loan portfolio | Public sector | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	940	1,011
Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	679	833
Forborne loan portfolio | Other financial institutions and: individual shareholder | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 83	€ 38
Forborne loan portfolio | Other financial institutions and: individual shareholder | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 106	€ 182
Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	594,786	728,123
Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	53,944	61,110
Forborne loan portfolio | Non financial institutions and individual shareholder | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 3,883	€ 4,079
Forborne loan portfolio | Non financial institutions and individual shareholder | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 1,555	€ 1,461
Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	13,477	14,236
Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	1,933	2,035
Forborne loan portfolio | Of which: Financing for constructions and property development | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 460	€ 415
Forborne loan portfolio | Of which: Financing for constructions and property development | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 38	€ 41
Forborne loan portfolio | Other warehouses | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	3,803,716	4,400,346
Forborne loan portfolio | Other warehouses | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	481,815	507,378
Forborne loan portfolio | Other warehouses | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 4,576	€ 4,602
Forborne loan portfolio | Other warehouses | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 3,782	€ 4,043
Non-current assets or disposal groups classified as held for sale [member] | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Non-current assets or disposal groups classified as held for sale [member] | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Non-current assets or disposal groups classified as held for sale [member] | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Non-current assets or disposal groups classified as held for sale [member] | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	0	0
Gross carrying amount | Forborne loan portfolio | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	12,365	14,511
Gross carrying amount | Forborne loan portfolio | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	17,046	17,452
Gross carrying amount | Forborne loan portfolio | Credit entities | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Gross carrying amount | Forborne loan portfolio | Credit entities | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Gross carrying amount | Forborne loan portfolio | Public sector | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	417	437
Gross carrying amount | Forborne loan portfolio | Public sector | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	7	5
Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	83	258
Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	233	285
Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	6,496	7,709
Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	6,716	6,977
Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	93	106
Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	552	506
Gross carrying amount | Forborne loan portfolio | Other warehouses | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	5,369	6,107
Gross carrying amount | Forborne loan portfolio | Other warehouses | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	10,090	10,185
Gross carrying amount | Non-current assets or disposal groups classified as held for sale [member] | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Gross carrying amount | Non-current assets or disposal groups classified as held for sale [member] | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Accumulated impairment | Forborne loan portfolio | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	7,386	8,089
Accumulated impairment | Forborne loan portfolio | Credit entities | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Accumulated impairment | Forborne loan portfolio | Public sector | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	4	4
Accumulated impairment | Forborne loan portfolio | Other financial institutions and: individual shareholder | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	53	58
Accumulated impairment | Forborne loan portfolio | Non financial institutions and individual shareholder | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	3,134	3,543
Accumulated impairment | Forborne loan portfolio | Of which: Financing for constructions and property development | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	128	134
Accumulated impairment | Forborne loan portfolio | Other warehouses | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	4,195	4,484
Accumulated impairment | Non-current assets or disposal groups classified as held for sale [member] | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	€ 0	€ 0
Credit impaired | Forborne loan portfolio | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	2,047,729	2,478,437
Credit impaired | Forborne loan portfolio | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	325,134	331,093
Credit impaired | Forborne loan portfolio | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 3,590	€ 3,900
Credit impaired | Forborne loan portfolio | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 3,051	€ 3,154
Credit impaired | Forborne loan portfolio | Credit entities | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Credit impaired | Forborne loan portfolio | Credit entities | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Credit impaired | Forborne loan portfolio | Credit entities | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Credit impaired | Forborne loan portfolio | Credit entities | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Credit impaired | Forborne loan portfolio | Public sector | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	8	7
Credit impaired | Forborne loan portfolio | Public sector | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	7	7
Credit impaired | Forborne loan portfolio | Public sector | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 1	€ 1
Credit impaired | Forborne loan portfolio | Public sector | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	438	472
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	340	428
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 21	€ 21
Credit impaired | Forborne loan portfolio | Other financial institutions and: individual shareholder | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 10	€ 51
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	312,108	385,859
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	33,165	37,225
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 1,863	€ 2,134
Credit impaired | Forborne loan portfolio | Non financial institutions and individual shareholder | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 659	€ 709
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	7,480	7,759
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	1,054	1,155
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 157	€ 183
Credit impaired | Forborne loan portfolio | Of which: Financing for constructions and property development | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 23	€ 18
Credit impaired | Forborne loan portfolio | Other warehouses | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	1,735,175	2,092,099
Credit impaired | Forborne loan portfolio | Other warehouses | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	291,622	293,433
Credit impaired | Forborne loan portfolio | Other warehouses | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 1,705	€ 1,744
Credit impaired | Forborne loan portfolio | Other warehouses | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 2,382	€ 2,394
Credit impaired | Non-current assets or disposal groups classified as held for sale [member] | Without collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Credit impaired | Non-current assets or disposal groups classified as held for sale [member] | With collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Number of transactions/operations | contract	0	0
Credit impaired | Non-current assets or disposal groups classified as held for sale [member] | Mortgage collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	€ 0	€ 0
Credit impaired | Non-current assets or disposal groups classified as held for sale [member] | Other collateral
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Maximum amount of the actual collateral that can be considered	0	0
Credit impaired | Gross carrying amount | Forborne loan portfolio | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	5,268	5,928
Credit impaired | Gross carrying amount | Forborne loan portfolio | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	8,707	9,116
Credit impaired | Gross carrying amount | Forborne loan portfolio | Credit entities | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Credit impaired | Gross carrying amount | Forborne loan portfolio | Credit entities | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Credit impaired | Gross carrying amount | Forborne loan portfolio | Public sector | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	3	3
Credit impaired | Gross carrying amount | Forborne loan portfolio | Public sector | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	1	1
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	22	25
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other financial institutions and: individual shareholder | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	61	107
Credit impaired | Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	2,922	3,307
Credit impaired | Gross carrying amount | Forborne loan portfolio | Non financial institutions and individual shareholder | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	3,302	3,751
Credit impaired | Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	52	56
Credit impaired | Gross carrying amount | Forborne loan portfolio | Of which: Financing for constructions and property development | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	216	235
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other warehouses | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	2,321	2,593
Credit impaired | Gross carrying amount | Forborne loan portfolio | Other warehouses | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	5,343	5,257
Credit impaired | Gross carrying amount | Non-current assets or disposal groups classified as held for sale [member] | Without collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Credit impaired | Gross carrying amount | Non-current assets or disposal groups classified as held for sale [member] | With collateral | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Credit impaired | Accumulated impairment | Forborne loan portfolio | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	6,031	6,546
Credit impaired | Accumulated impairment | Forborne loan portfolio | Credit entities | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	0	0
Credit impaired | Accumulated impairment | Forborne loan portfolio | Public sector | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	3	3
Credit impaired | Accumulated impairment | Forborne loan portfolio | Other financial institutions and: individual shareholder | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	43	50
Credit impaired | Accumulated impairment | Forborne loan portfolio | Non financial institutions and individual shareholder | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	2,712	3,078
Credit impaired | Accumulated impairment | Forborne loan portfolio | Of which: Financing for constructions and property development | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	101	112
Credit impaired | Accumulated impairment | Forborne loan portfolio | Other warehouses | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	3,273	3,415
Credit impaired | Accumulated impairment | Non-current assets or disposal groups classified as held for sale [member] | Loans And Receivables
CURRENT REFINANCING AND RESTRUCTURING BALANCES
Financial assets	€ 0	€ 0

Other disclosures - Disclosure

Other disclosures - Disclosure of home purchase loans in Spain (Details) - Home purchase loans - Spain - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Disclosure of credit risk exposure [line items]
Percentage secured by mortgage	99.66%
Gross carrying amount
Disclosure of credit risk exposure [line items]
Financial assets	€ 60,431	€ 61,097
Gross carrying amount | Without collateral
Disclosure of credit risk exposure [line items]
Financial assets	203	215
Gross carrying amount | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	60,228	60,882
Credit impaired | Gross carrying amount
Disclosure of credit risk exposure [line items]
Financial assets	959	924
Credit impaired | Gross carrying amount | Without collateral
Disclosure of credit risk exposure [line items]
Financial assets	14	16
Credit impaired | Gross carrying amount | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	€ 945	€ 908

Other disclosures - Real estate

Other disclosures - Real estate business - Spain (Details) - Home purchase loans - Spain	6 Months Ended
	Jun. 30, 2024
Less than 80 %
Disclosure of credit risk exposure [line items]
Percentage of portfolio with LTV less than 80%	93%
Weighted average
Disclosure of credit risk exposure [line items]
Affordability rate	24%
Maximum | Less than 80 %
Disclosure of credit risk exposure [line items]
Loan-to-value (LTV) ratio (in percentage)	80%

Other disclosures - Disclosur_2

Other disclosures - Disclosure of gross exposure by stages of impairment (Details) - Home purchase loans - Spain - Gross carrying amount - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of credit risk exposure [line items]
Financial assets	€ 60,431	€ 61,097
With collateral
Disclosure of credit risk exposure [line items]
Financial assets	60,228	60,882
Less than or equal to 40% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	17,665	18,728
More than 40% or less than 60% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	20,089	20,720
More than 60% and less than 80% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	18,003	18,083
More than 80% and less or equal to 100% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	3,234	2,294
More than 100% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	1,237	1,057
Credit impaired
Disclosure of credit risk exposure [line items]
Financial assets	959	924
Credit impaired | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	945	908
Credit impaired | Less than or equal to 40% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	119	131
Credit impaired | More than 40% or less than 60% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	177	192
Credit impaired | More than 60% and less than 80% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	217	199
Credit impaired | More than 80% and less or equal to 100% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	167	151
Credit impaired | More than 100% | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	€ 265	€ 235

Other disclosures - Disclosur_3

Other disclosures - Disclosure of financing for construction and real estate business in Spain (Details) - Spain - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Construction and property development loans
Disclosure of credit risk exposure [line items]
Financial assets	€ 2,491	€ 2,393
Gross carrying amount | Construction and property development loans
Disclosure of credit risk exposure [line items]
Financial assets	2,525	2,433
Written-off assets	345	346
Gross carrying amount | Construction and property development loans | Credit impaired
Disclosure of credit risk exposure [line items]
Financial assets	54	74
Excess over collateral value | Construction and property development loans
Disclosure of credit risk exposure [line items]
Risk exposure	278	259
Excess over collateral value | Construction and property development loans | Credit impaired
Disclosure of credit risk exposure [line items]
Risk exposure	5	5
Accumulated impairment
Disclosure of credit risk exposure [line items]
Financial assets	(1,162)	(1,230)
Accumulated impairment | Construction and property development loans
Disclosure of credit risk exposure [line items]
Financial assets	(34)	(40)
Accumulated impairment | Construction and property development loans | Credit impaired
Disclosure of credit risk exposure [line items]
Financial assets	€ (25)	€ (29)

Other disclosures - Disclosur_4

Other disclosures - Disclosure of financing for construction and real estate business in Spain, memorandum items (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Memorandum items:
Total consolidated assets (Total business) (book value)	€ 1,786,261	€ 1,797,062
Spain | Accumulated impairment
Memorandum items:
Impairment losses and provision for exposure classified as normal (business in Spain)	1,162	1,230
Spain | Customers excluding the public sector
Memorandum items:
Total loans and advances to customers excluding the public sector (business in Spain) (book value)	€ 244,349	€ 241,695

Other disclosures - Disclosur_5

Other disclosures - Disclosure of concentration of portfolio (Details) - Construction and property development loans - Spain - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of credit risk exposure [line items]
Financial assets	€ 2,491	€ 2,393
Gross carrying amount
Disclosure of credit risk exposure [line items]
Financial assets	2,525	2,433
Gross carrying amount | Without collateral
Disclosure of credit risk exposure [line items]
Financial assets	14	16
Gross carrying amount | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	2,511	2,417
Gross carrying amount | Completed buildings | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	994	1,032
Gross carrying amount | Completed buildings | Residential
Disclosure of credit risk exposure [line items]
Financial assets	663	642
Gross carrying amount | Completed buildings | Other
Disclosure of credit risk exposure [line items]
Financial assets	331	390
Gross carrying amount | Building and other constructions under construction | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	1,497	1,364
Gross carrying amount | Building and other constructions under construction | Residential
Disclosure of credit risk exposure [line items]
Financial assets	1,424	1,292
Gross carrying amount | Building and other constructions under construction | Other
Disclosure of credit risk exposure [line items]
Financial assets	73	72
Gross carrying amount | Land | With collateral
Disclosure of credit risk exposure [line items]
Financial assets	20	21
Gross carrying amount | Land | Developed consolidated land
Disclosure of credit risk exposure [line items]
Financial assets	13	14
Gross carrying amount | Land | Other land
Disclosure of credit risk exposure [line items]
Financial assets	€ 7	€ 7

Other disclosures - Disclosur_6

Other disclosures - Disclosure of foreclosed real estate assets (Details) - Foreclosed properties - Spain - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of credit risk exposure [line items]
Loans and advances to customers	€ 2,306	€ 2,448
Of which: Financing for constructions and property development
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,004	2,100
Completed Buildings
Disclosure of credit risk exposure [line items]
Loans and advances to customers	333	439
Completed Buildings | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	95	113
Completed Buildings | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	238	326
Buildings And Other Constructions Under Construction
Disclosure of credit risk exposure [line items]
Loans and advances to customers	68	56
Buildings And Other Constructions Under Construction | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2	3
Buildings And Other Constructions Under Construction | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	66	53
Land Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,603	1,605
Land Loans | Developed Consolidated Land
Disclosure of credit risk exposure [line items]
Loans and advances to customers	471	518
Land Loans | Land Loans, Other
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,132	1,087
Home purchase loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	242	276
Other debt securities
Disclosure of credit risk exposure [line items]
Loans and advances to customers	60	72
Gross carrying amount
Disclosure of credit risk exposure [line items]
Loans and advances to customers	5,183	5,506
Gross carrying amount | Of which: Financing for constructions and property development
Disclosure of credit risk exposure [line items]
Loans and advances to customers	4,634	4,901
Gross carrying amount | Completed Buildings
Disclosure of credit risk exposure [line items]
Loans and advances to customers	817	1,054
Gross carrying amount | Completed Buildings | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	195	224
Gross carrying amount | Completed Buildings | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	622	830
Gross carrying amount | Buildings And Other Constructions Under Construction
Disclosure of credit risk exposure [line items]
Loans and advances to customers	126	101
Gross carrying amount | Buildings And Other Constructions Under Construction | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	9	12
Gross carrying amount | Buildings And Other Constructions Under Construction | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	117	89
Gross carrying amount | Land Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	3,691	3,746
Gross carrying amount | Land Loans | Developed Consolidated Land
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,001	1,107
Gross carrying amount | Land Loans | Land Loans, Other
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,690	2,639
Gross carrying amount | Home purchase loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	435	473
Gross carrying amount | Other debt securities
Disclosure of credit risk exposure [line items]
Loans and advances to customers	114	132
Accumulated impairment
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,877	3,058
Accumulated impairment | Of which: Financing for constructions and property development
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,630	2,801
Accumulated impairment | Completed Buildings
Disclosure of credit risk exposure [line items]
Loans and advances to customers	484	615
Accumulated impairment | Completed Buildings | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	100	111
Accumulated impairment | Completed Buildings | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	384	504
Accumulated impairment | Buildings And Other Constructions Under Construction
Disclosure of credit risk exposure [line items]
Loans and advances to customers	58	45
Accumulated impairment | Buildings And Other Constructions Under Construction | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	7	9
Accumulated impairment | Buildings And Other Constructions Under Construction | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	51	36
Accumulated impairment | Land Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,088	2,141
Accumulated impairment | Land Loans | Developed Consolidated Land
Disclosure of credit risk exposure [line items]
Loans and advances to customers	530	589
Accumulated impairment | Land Loans | Land Loans, Other
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,558	1,552
Accumulated impairment | Home purchase loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	193	197
Accumulated impairment | Other debt securities
Disclosure of credit risk exposure [line items]
Loans and advances to customers	54	60
Accumulated Impairment Since Initial Impairment
Disclosure of credit risk exposure [line items]
Loans and advances to customers	2,108	2,249
Accumulated Impairment Since Initial Impairment | Of which: Financing for constructions and property development
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,935	2,072
Accumulated Impairment Since Initial Impairment | Completed Buildings
Disclosure of credit risk exposure [line items]
Loans and advances to customers	406	519
Accumulated Impairment Since Initial Impairment | Completed Buildings | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	80	89
Accumulated Impairment Since Initial Impairment | Completed Buildings | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	326	430
Accumulated Impairment Since Initial Impairment | Buildings And Other Constructions Under Construction
Disclosure of credit risk exposure [line items]
Loans and advances to customers	45	36
Accumulated Impairment Since Initial Impairment | Buildings And Other Constructions Under Construction | Residential Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	5	6
Accumulated Impairment Since Initial Impairment | Buildings And Other Constructions Under Construction | Other Purposes Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	40	30
Accumulated Impairment Since Initial Impairment | Land Loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,484	1,517
Accumulated Impairment Since Initial Impairment | Land Loans | Developed Consolidated Land
Disclosure of credit risk exposure [line items]
Loans and advances to customers	333	366
Accumulated Impairment Since Initial Impairment | Land Loans | Land Loans, Other
Disclosure of credit risk exposure [line items]
Loans and advances to customers	1,151	1,151
Accumulated Impairment Since Initial Impairment | Home purchase loans
Disclosure of credit risk exposure [line items]
Loans and advances to customers	131	131
Accumulated Impairment Since Initial Impairment | Other debt securities
Disclosure of credit risk exposure [line items]
Loans and advances to customers	€ 42	€ 46

Other disclosures - Foreclosed

Other disclosures - Foreclosed real estate assets (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	€ 8,235	€ 7,646
Foreclosed properties | Spain
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	19
Foreclosed equity instruments | Spain
Disclosure of detailed information about investment property [line items]
Investments accounted for using equity method	€ 13

Other disclosures - Solvency in

Other disclosures - Solvency information (Details)	Jun. 30, 2024	Dec. 31, 2023
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	12.48%	12.30%
Tier 1 phase in capital ratio	13.89%	13.75%
Total phase-in capital	16.71%	16.39%
CET1 phase-in percentage, fully loaded	12.46%
Minimum
IFRS Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 phase-in percentage	9.62%
Pillar 1 percentage	4.50%
Pillar 2 percentage	0.98%
Capital conservation buffer, percentage	2.50%
Globally Systemically Important Entity percentage	1.25%
Percentage of anti cyclical buffer on common equity Tier1 capital	0.39%
Tier 1 phase in capital ratio	11.45%
Total phase-in capital	13.88%

Other disclosures - Disclosur_7

Other disclosures - Disclosure of capital ratio (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Other Disclosures
Level 1 ordinary eligible capital (EUR million)	€ 77,975	€ 76,741
Level 1 additional eligible capital (EUR million)	8,834	9,002
Level 2 eligible capital (EUR million)	17,612	16,497
Risk-weighted assets (EUR million)	€ 624,831	€ 623,731
Level 1 ordinary capital coefficient (CET 1)	12.48%	12.30%
Level 1 additional capital coefficient (AT1)	1.41%	1.45%
Level 1 capital coefficient (TIER1)	13.89%	13.75%
Level 2 capital coefficient (TIER 2)	2.82%	2.64%
Total capital ratio	16.71%	16.39%

Other disclosures - Disclosur_8

Other disclosures - Disclosure of leverage capital (Details) - EUR (€) € in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Other Disclosures
Tier 1 capital (EUR million)	€ 86,809	€ 85,742
Exposure (EIR million)	€ 1,830,215	€ 1,826,922
Leverage ratio	4.74%	4.69%

Additional disclosure require_3

Additional disclosure requirements - Condensed Balance Sheets (Details) - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Assets
Cash and due from banks	€ 134,228		€ 186,134
Trading account assets	206,874	€ 176,921
Premises and equipment, net	32,764	32,926
Other assets	9,707	8,856
TOTAL ASSETS	1,786,261	1,797,062
Liabilities
Other liabilities	18,026	17,598
TOTAL LIABILITIES	1,682,613	1,692,821
Stockholders' equity
Capital stock	7,747	8,092
TOTAL EQUITY	103,648	104,241	€ 102,044	€ 97,585
TOTAL LIABILITIES AND EQUITY	1,786,261	1,797,062
Banco Santander S.A. | Reportable legal entities
Assets
Cash and due from banks	130,150	172,524
Trading account assets	116,064	102,296
Investment securities	72,272	63,325
Investment in affiliated companies	100,430	99,326
Premises and equipment, net	6,216	6,368
Other assets	15,099	15,435
TOTAL ASSETS	751,517	757,342
Liabilities
Deposits	369,131	398,374
Short-term debt	95,981	70,771
Long-term debt	120,371	129,258
Total debt	216,352	200,029
Other liabilities	89,178	84,065
TOTAL LIABILITIES	674,661	682,468
Stockholders' equity
Capital stock	7,747	8,092
Retained earnings and other reserves	69,109	66,782
TOTAL EQUITY	76,856	74,874
TOTAL LIABILITIES AND EQUITY	751,517	757,342
Banco Santander S.A. | Reportable legal entities | Loans and Leases
Assets
Financial assets	311,285	298,068
Bank subsidiaries | Banco Santander S.A. | Reportable legal entities
Assets
Cash and due from banks	7,476	6,834
Investment securities	17,403	16,137
Investment in affiliated companies	74,374	74,016
Liabilities
Deposits	4,489	7,832
Total debt	50	0
Non-bank subsidiaries | Banco Santander S.A. | Reportable legal entities
Assets
Investment securities	992	1,229
Investment in affiliated companies	26,056	25,310
Liabilities
Deposits	17,123	14,610
Total debt	1,193	1,816
Non-bank subsidiaries | Banco Santander S.A. | Reportable legal entities | Loans and Leases
Assets
Financial assets	€ 21,680	€ 22,435

Additional disclosure require_4

Additional disclosure requirements - Condensed Statements of Income (Details) - EUR (€) € in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Condensed Income Statements, Captions [Line Items]
Interest income		€ 56,838	€ 49,922
Dividends from affiliated companies		493	382
Interest expense		(33,381)	(29,002)
Non-interest income:	[1]	409	480
Non-interest expense:		(1,391)	(1,504)
Operating profit/(loss) before tax		9,508	8,090
Income tax expense		(2,916)	(2,281)
Profit/(loss) for the period		6,592	5,809
Banco Santander S.A. | Reportable legal entities
Condensed Income Statements, Captions [Line Items]
Interest income		18,184	13,380
Dividends from affiliated companies		4,170	3,131
Interest expense		(9,993)	(6,938)
Interest income / (Charges)		8,191	6,442
Provision for credit losses		(658)	(755)
Interest income / (Charges) after provision for credit losses		7,532	5,687
Non-interest income:		2,724	2,397
Non-interest expense:		(4,517)	(4,187)
Operating profit/(loss) before tax		5,739	3,897
Income tax expense		(337)	(243)
Profit/(loss) for the period		5,402	3,654
Banco Santander S.A. | Reportable legal entities | Earnings Assets
Condensed Income Statements, Captions [Line Items]
Interest income		14,014	10,249
Banco Santander S.A. | Reportable legal entities | Bank subsidiaries
Condensed Income Statements, Captions [Line Items]
Dividends from affiliated companies		3,747	2,618
Banco Santander S.A. | Reportable legal entities | Non-bank subsidiaries
Condensed Income Statements, Captions [Line Items]
Dividends from affiliated companies		€ 423	€ 513
[1]Includes EUR -687 million at 30 June 2024 (EUR -574 million at 30 June 2023) derived from the net monetary loss generated in Argentina as a result of the application of IAS 29 Financial reporting in hyperinflationary economies.

Additional disclosure require_5

Additional disclosure requirements - Condensed Statements of Comprehensive Income (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Condensed Statement of Income Captions [Line Items]
Profit/(loss) for the period	€ 6,592	€ 5,809
OTHER RECOGNISED INCOME AND EXPENSE	(2,393)	2,091
Items that may be reclassified to profit or loss	(2,364)	2,580
Hedging instruments (items not designated)	0	0
Revaluation gains (losses)	0	0
Amounts transferred to income statement	0	0
Other reclassifications	0	0
Debt instruments at fair value with changes in other comprehensive income	(325)	790
Revaluation gains (losses)	(291)	782
Amounts transferred to income statement	(34)	8
Other reclassifications	0	0
Cash flow hedges (effective portion)	(403)	596
Revaluation gains (losses)	(887)	(1,318)
Amounts transferred to income statement	484	1,914
Amounts transferred to initial carrying amount of hedged items	0	0
Other reclassifications	0	0
Hedges of net investments in foreign operations (effective portion)	101	(1,527)
Exchange differences	(1,932)	3,094
Non-current assets held for sale	0	0
Income tax	252	(461)
Items that will not be reclassified to profit or loss	(29)	(489)
Actuarial gains/(losses) on pension plans	(59)	(402)
Other recognised income and expense of investments in subsidiaries, joint ventures and associates	(4)	(5)
Changes in the fair value of equity instruments measured at fair value through other comprehensive income	107	(201)
Gains or losses resulting from the accounting for hedges of equity instruments measured at fair value through other comprehensive income, net	0	0
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedged item)	4	(41)
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedging instrument)	(4)	41
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(90)	(50)
Income tax relating to items that will not be reclassified	17	169
Total recognised income and expenses for the year	4,199	7,900
Banco Santander S.A. | Reportable legal entities
Condensed Statement of Income Captions [Line Items]
Profit/(loss) for the period	5,402	3,654
OTHER RECOGNISED INCOME AND EXPENSE	71	(183)
Items that may be reclassified to profit or loss	93	104
Hedging instruments (items not designated)	0	0
Revaluation gains (losses)	0	0
Amounts transferred to income statement	0	0
Other reclassifications	0	0
Debt instruments at fair value with changes in other comprehensive income	(26)	43
Revaluation gains (losses)	(95)	38
Amounts transferred to income statement	69	5
Other reclassifications	0	0
Cash flow hedges (effective portion)	163	133
Revaluation gains (losses)	(13)	(24)
Amounts transferred to income statement	176	157
Amounts transferred to initial carrying amount of hedged items	0	0
Other reclassifications	0	0
Hedges of net investments in foreign operations (effective portion)	0	0
Exchange differences	0	0
Non-current assets held for sale	0	0
Income tax	(44)	(72)
Items that will not be reclassified to profit or loss	(22)	(287)
Actuarial gains/(losses) on pension plans	2	12
Other recognised income and expense of investments in subsidiaries, joint ventures and associates	0	0
Changes in the fair value of equity instruments measured at fair value through other comprehensive income	17	(275)
Gains or losses resulting from the accounting for hedges of equity instruments measured at fair value through other comprehensive income, net	0	0
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedged item)	4	(41)
Changes in the fair value of equity instruments measured at fair value through other comprehensive income (hedging instrument)	(4)	41
Changes in the fair value of financial liabilities at fair value through profit or loss attributable to changes in credit risk	(61)	(34)
Income tax relating to items that will not be reclassified	20	10
Total recognised income and expenses for the year	€ 5,473	€ 3,471

Additional disclosure require_6

Additional disclosure requirements - Condensed Cash Flow Statements (Details) - EUR (€) € in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
1. Cash flows from operating activities
Consolidated profit	€ 6,592	€ 5,809
Adjustments to profit	13,925	13,720
Net increase/decrease in operating assets	(82,440)	(45,762)
Net increase/decrease in operating liabilities	3,232	15,842
Reimbursements/payments of income tax	(1,481)	(1,504)
CASH FLOWS FROM OPERATING ACTIVITIES	(60,172)	(11,895)
2. Cash flows from investing activities
Investments (-)	(6,034)	(6,832)
Divestments (+)	3,733	4,334
CASH FLOWS FROM INVESTING ACTIVITIES	(2,301)	(2,498)
3. Cash flows from financing activities
Issuance of own equity instruments	0	0
Disposal of own equity instruments	471	467
Acquisition of own equity instruments	(2,159)	(1,723)
Dividends paid	(1,485)	(963)
CASH FLOWS FROM FINANCING ACTIVITIES	(4,173)	(2,358)
Effect of exchange rate changes on cash and cash equivalents	2,538	1,224
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(64,108)	(15,527)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	220,342	223,073
CASH AND CASH EQUIVALENTS AT END OF PERIOD	156,234	207,546
Banco Santander S.A. | Reportable legal entities
1. Cash flows from operating activities
Consolidated profit	5,402	3,654
Adjustments to profit	(2,740)	2,080
Net increase/decrease in operating assets	(45,848)	(10,186)
Net increase/decrease in operating liabilities	(11,864)	(14,608)
Reimbursements/payments of income tax	1,063	1,134
CASH FLOWS FROM OPERATING ACTIVITIES	(53,987)	(17,926)
2. Cash flows from investing activities
Investments (-)	(1,850)	(2,438)
Divestments (+)	4,285	4,099
CASH FLOWS FROM INVESTING ACTIVITIES	2,435	1,661
3. Cash flows from financing activities
Issuance of own equity instruments	0	0
Disposal of own equity instruments	302	336
Acquisition of own equity instruments	(2,032)	(1,622)
Issuance of debt securities	3,908	1,500
Redemption of debt securities	(2,994)	(438)
Dividends paid	(1,485)	(963)
Issuance/Redemption of equity instruments	0	0
Other collections/payments related to financing activities	(151)	(87)
CASH FLOWS FROM FINANCING ACTIVITIES	(2,452)	(1,274)
Effect of exchange rate changes on cash and cash equivalents	1,156	(429)
NET INCREASE/(DECREASE) IN CASH AND CASH EQUIVALENTS	(52,848)	(17,968)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	125,020	130,083
CASH AND CASH EQUIVALENTS AT END OF PERIOD	€ 72,172	€ 112,115

Additional disclosure require_7

Additional disclosure requirements - Schedule of preference shares and preferred securities (Details) - Financial liabilities at amortized cost - EUR (€) € in Millions	Jun. 30, 2024	Dec. 31, 2023
Subordinated
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 8,488	€ 9,283
Preference shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	207	202
Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 8,281	€ 9,081

Additional disclosure require_8

Additional disclosure requirements - Schedule of preference shares and preferred securities by issuer (Details) € in Millions, £ in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2024 EUR (€)	Jun. 30, 2024 GBP (£)	Jun. 30, 2024 USD ($)
Santander UK plc, October 1995 | Preference shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £		£ 80.3
Interest rate	10.375%	10.375%	10.375%
Santander UK plc, February 1996 | Preference shares
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | £		£ 80.3
Interest rate	10.375%	10.375%	10.375%
Banco Santander, S.A., March 2018
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	7 years
Banco Santander, S.A., March 2018 | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 187.6
Interest rate	4.75%	4.75%	4.75%
Adjustment to reference rate, after initial interest rate period	4.097%	4.097%	4.097%
Reference rate	5-year
Banco Santander, S.A., January 2020
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	6 years
Reference rate	5-year
Reprice term	5 years
Banco Santander, S.A., January 2020 | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 1,498.6
Interest rate	4.375%	4.375%	4.375%
Adjustment to reference rate, after initial interest rate period	4.534%	4.534%	4.534%
Banco Santander, S.A., May 2021 | US Dollar
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	6 years
Reference rate	5-year
Reprice term	5 years
Banco Santander, S.A., May 2021 | Euro
Disclosure of detailed information about financial instruments [line items]
Initial interest rate term	7 years
Reference rate	5-year
Reprice term	5 years
Banco Santander, S.A., May 2021 | Preferred securities | US Dollar
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 1,000
Interest rate	4.75%	4.75%	4.75%
Adjustment to reference rate, after initial interest rate period	3.753%	3.753%	3.753%
Banco Santander, S.A., May 2021 | Preferred securities | Euro
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 750
Interest rate	4.125%	4.125%	4.125%
Adjustment to reference rate, after initial interest rate period	4.311%	4.311%	4.311%
Banco Santander, S.A., September 2021 | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 990
Interest rate	3.625%	3.625%	3.625%
Banco Santander, S.A., September 2021 | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Interest rate	3.625%	3.625%	3.625%
Initial interest rate term	8 years
Reprice term	5 years
Subordinated issue, mid-swap rate term	5 years
Banco Santander, S.A., September 2021 | Mid Swap Rate Five Year Euro | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	3.76%	3.76%	3.76%
Issuance By Banco Santander S.A. In November 2023, First Series | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Interest rate	9.625%	9.625%	9.625%
Initial interest rate term	5 years 6 months
Reprice term	5 years
Subordinated Issue, UST Rate Term	5 years
Issuance By Banco Santander S.A. In November 2023, First Series | Fixed interest rate [member] | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 1,149.6
Interest rate	9.625%	9.625%	9.625%
Issuance By Banco Santander S.A. In November 2023, First Series | UST Rate Five Year US Dollar | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	5.306%	5.306%	5.306%
Issuance By Banco Santander S.A. In November 2023, Second Series | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Interest rate	9.625%	9.625%	9.625%
Initial interest rate term	10 years
Reprice term	5 years
Subordinated Issue, UST Rate Term	5 years
Issuance By Banco Santander S.A. In November 2023, Second Series | Fixed interest rate [member] | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount | $			$ 1,349.8
Interest rate	9.625%	9.625%	9.625%
Issuance By Banco Santander S.A. In November 2023, Second Series | UST Rate Five Year US Dollar | Subordinated Liabilities, Preferred Securities
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	5.298%	5.298%	5.298%
Issuance By Banco Santander S.A. In May 2024 | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 1,500
Interest rate	7%	7%	7%
Initial interest rate term	6 years
Reprice term	5 years
Subordinated issue, mid-swap rate term	5 years
Issuance By Banco Santander S.A. In May 2024 | Mid Swap Rate Five Year Euro | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Adjustment to reference rate, after initial interest rate period	4.432%	4.432%	4.432%
Santander Finance Preferred, S.A. (Unipersonal), September 2004 | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Outstanding issue amount	€ 144
Santander Finance Preferred, S.A. (Unipersonal), September 2004 | CMS 10 interest rate | Preferred securities
Disclosure of detailed information about financial instruments [line items]
Interest rate	8%	8%	8%
Variable interest rate	0.05%	0.05%	0.05%