Note 8 Fair value and carrying amount of the financial instruments (Details) - EUR (€) € in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets-liabilities [Line Items]
Cash and cash equivalents	€ 79,756	€ 67,799	€ 65,520
Current financial assets at fair value through profit or loss, classified as held for trading	110,671	123,493	105,878
Financial assets at fair value through profit or loss, mandatorily measured at fair value	6,888	6,086	5,198
Financial assets at fair value through profit or loss	913	1,092	1,117
Financial assets at fair value through other comprehensive income	58,980	60,421	69,440
Financial assets at amortised cost	422,061	372,676	367,668
Derivative financial assets held for hedging	1,891	1,805	1,991
Current financial liabilities at fair value through profit or loss, classified as held for trading	95,611	91,135	84,109
Financial liabilities at fair value through profit or loss	10,580	9,683	10,050
Financial liabilities at amortised cost	528,629	487,893	490,606
Derivative financial liabilities held for hedging	3,303	2,626	2,318
At fair value [member]
Assets-liabilities [Line Items]
Cash and cash equivalents	79,756	67,799	65,520
Current financial assets at fair value through profit or loss, classified as held for trading	110,671	123,493	105,878
Financial assets at fair value through profit or loss, mandatorily measured at fair value	6,888	6,086	5,198
Financial assets at fair value through profit or loss	913	1,092	1,117
Financial assets at fair value through other comprehensive income	58,980	60,421	69,440
Financial assets at amortised cost	419,060	377,451	374,267
Derivative financial assets held for hedging	1,891	1,805	1,991
Current financial liabilities at fair value through profit or loss, classified as held for trading	95,611	91,135	84,109
Financial liabilities at fair value through profit or loss	10,580	9,683	10,050
Financial liabilities at amortised cost	525,052	488,733	491,006
Derivative financial liabilities held for hedging	€ 3,303	€ 2,626	€ 2,318

Assets-liabilities

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The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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The amount of current financial liabilities at fair value through profit or loss that meet the definition of held for trading. [Refer: Current financial liabilities at fair value through profit or loss]

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The amount of derivative financial assets held for hedging. [Refer: Derivative financial assets]

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The amount of derivative financial liabilities held for hedging. [Refer: Derivative financial liabilities]

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The amount of financial assets at amortised cost. The amortised cost is the amount at which financial assets are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount, and adjusted for any impairment. [Refer: Financial assets]

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The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income]

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The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets]

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The amount of financial assets at fair value through profit or loss classified as held for trading. A financial asset is classified as held for trading if: (a) it is acquired principally for the purpose of selling it in the near term; (b) on initial recognition it is part of a portfolio of identified financial instruments that are managed together and for which there is evidence of a recent actual pattern of short-term profit-taking; or (c) it is a derivative (except for a derivative that is a financial guarantee contract or a designated and effective hedging instrument). [Refer: At fair value [member]; Financial assets at fair value through profit or loss]

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The amount of financial assets mandatorily measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Financial assets at fair value through profit or loss]

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The amount of financial liabilities at amortised cost. The amortised cost is the amount at which financial liabilities are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount. [Refer: Financial liabilities]

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The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities]

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