XML 307 R268.htm IDEA: XBRL DOCUMENT v3.20.4
Note 41 - Gains (losses) on financial assets and liabilities (net) and Exchange Differences - Derivatives - Hedge accounting (Details) - EUR (€)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments € 1,187,000,000 € 705,000,000 € 1,136,000,000
Trading Derivatives [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 270,000,000 (1,187,000,000) 790,000,000
Trading Derivatives [Member] | Interest Rate Risk Member      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 269,000,000 (85,000,000) 61,000,000
Trading Derivatives [Member] | Securities Agreements [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments (36,000,000) (1,072,000,000) 298,000,000
Trading Derivatives [Member] | Commodities Risk [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 1,000,000 5,000,000 (2,000,000)
Trading Derivatives [Member] | Credit Risk Member      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments (89,000,000) 74,000,000 (109,000,000)
Trading Derivatives [Member] | Foreign Exchange And Gold Risk [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 88,000,000 (75,000,000) 565,000,000
Trading Derivatives [Member] | Other Risk [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 37,000,000 (35,000,000) (24,000,000)
Hedging Derivatives Ineffectiveness [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 7,000,000 55,000,000 69,000,000
Hedging Derivatives Ineffectiveness [Member] | Fair Value Risk [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 5,000,000 55,000,000 68,000,000
Hedging Derivatives Ineffectiveness [Member] | Hedging Derivatives [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments (151,000,000) (36,000,000) (135,000,000)
Hedging Derivatives Ineffectiveness [Member] | Hedged Item      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments 156,000,000 91,000,000 203,000,000
Hedging Derivatives Ineffectiveness [Member] | Cash Flow Risk [Member]      
Gains or losses en financial assets and liabilities trading derivatives line items      
Equity Instruments, gains (losses) on financial instruments € 2,000,000 € 0 € 1,000,000