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Note 8 - Fair Value - Main Valuation Techniques Financial Instruments Assets - Significant Observable Inputs Used In Fair Value Measurement Of Assets (Details) - EUR (€) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 736,176,000,000 | € 697,737,000,000 | € 675,675,000,000
Financial Assets Held For Trading [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 73,856,000,000 | 69,092,000,000 | 61,969,000,000
Financial Assets Held For Trading [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 1,847,000,000 | 1,508,000,000 | 404,000,000
Financial Assets Held For Trading [Member] | Loans and advances [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Present-value method (Discounted future cash flows) |  |
Main Observable Inputs | - Issuer´s credit risk - Current market interest rates - Funding interest rates observed in the market or in consensus services - Exchange rates |  |
Main Unobservable Inputs | - Prepayment rates - Issuer´s credit risk - Recovery rates - Funding interest rates not observed in the market or in consensus services |  |
Financial Assets Held For Trading [Member] | Loans and advances [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 28,659,000,000 | 32,321,000,000 | 28,642,000,000
Financial Assets Held For Trading [Member] | Loans and advances [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 1,609,000,000 | 1,285,000,000 | 60,000,000
Financial Assets Held For Trading [Member] | Debt Securities [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Present-value method (Discounted future cash flows) Observed prices in non active markets |  |
Main Observable Inputs | - Issuer´s credit risk - Current market interest rates - Non active markets prices |  |
Main Unobservable Inputs | - Prepayment rates - Issuer´s credit risk - Recovery rates |  |
Financial Assets Held For Trading [Member] | Debt Securities [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 11,123,000,000 | 8,178,000,000 | 7,494,000,000
Financial Assets Held For Trading [Member] | Debt Securities [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 57,000,000 | 55,000,000 | 199,000,000
Financial Assets Held For Trading [Member] | Equity instruments [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Comparable pricing (Observable price in a similar market) Net asset value |  |
Main Observable Inputs | - Brokers quotes - Market operations - NAVs published |  |
Main Unobservable Inputs | - NAV not published |  |
Financial Assets Held For Trading [Member] | Equity instruments [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 31,000,000 | 0 | 0
Financial Assets Held For Trading [Member] | Equity instruments [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 60,000,000 | 59,000,000 | 60,000,000
Financial Assets Held For Trading [Member] | Derivatives [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Main Observable Inputs | - Exchange rates - Market quoted future prices - Market interest rates - Underlying assets prices: shares, funds, commodities - Market observable volatilities - Issuer credit spread levels - Quoted dividends - Market listed correlations |  |
Financial Assets Held For Trading [Member] | Derivatives [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 34,043,000,000 | 28,593,000,000 | 25,833,000,000
Financial Assets Held For Trading [Member] | Derivatives [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 121,000,000 | 109,000,000 | 85,000,000
Financial Assets Held For Trading [Member] | Derivatives [Member] | Interest Rate Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Interest rate products (Interest rate Swaps, Call money Swaps and FRA): Discounted cash flows Caps/Floors: Black, Hull-White and SABR Bond options: Black Swaptions: Black, Hull-White and LGM Other Interest rate Options: Black, Hull-White and LGM Constant Maturity Swaps: SABR |  |
Main Unobservable Inputs | - Beta - Implicit correlations between tenors - interest rates volatility |  |
Financial Assets Held For Trading [Member] | Derivatives [Member] | Equity Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Future and Equity Forward: Discounted future cash flows Equity Options: Local Volatility, Momentum adjustment |  |
Main Unobservable Inputs | - Volatility of volatility - Implicit assets correlations - Long term implicit correlations - Implicit dividends and long term repos |  |
Financial Assets Held For Trading [Member] | Derivatives [Member] | Foreign Exchange And Gold Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Future and Equity Forward: Discounted future cash flows Foreign exchange Options: Local volatility, moments adjustment |  |
Main Unobservable Inputs | - Volatility of volatility - Implicit assets correlations - Long term implicit correlations |  |
Financial Assets Held For Trading [Member] | Derivatives [Member] | Credit Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Credit Derivatives: Default model and Gaussian copula |  |
Main Unobservable Inputs | - Correlation default - Credit spread - Recovery rates - Interest rate yield - Default volatility |  |
Financial Assets Held For Trading [Member] | Derivatives [Member] | Commodities Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Commodities: Momentum adjustment and discounted cash flows |  |
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 381,000,000 | 92,000,000 | 78,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 992,000,000 | 1,160,000,000 | 1,929,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Loans and advances [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Specific liquidation criteria regarding losses of the EPA proceedings PD and LGD of the internal models, valuations and specific criteria of the EPA proceedings Discounted future cash flows |  |
Main Unobservable Inputs | - Prepayment rates - Business plan of the underlying asset, WACC, macro scenario - Property valuation |  |
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Loans and advances [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 0 | 0 | 0
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Loans and advances [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 499,000,000 | 1,038,000,000 | 1,778,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Debt Securities [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Present-value method (Discounted future cash flows) |  |
Main Observable Inputs | - Issuer credit risk - Current market interest rates |  |
Main Unobservable Inputs | - Prepayment rates - Issuer credit risk - Recovery rates |  |
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Debt Securities [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 324,000,000 | 91,000,000 | 71,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Debt Securities [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 28,000,000 | 19,000,000 | 76,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Equity instruments [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Comparable pricing (Observable price in a similar market) Net asset value |  |
Main Observable Inputs | - Brokers quotes - Market operations - NAVs published |  |
Main Unobservable Inputs | - NAV provided by the administrator of the fund |  |
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Equity instruments [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 57,000,000 | 1,000,000 | 8,000,000
Non Trading Financial Assets Mandatorily At Fair Value Through Profit Or Loss [Member] | Equity instruments [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 465,000,000 | 103,000,000 | 75,000,000
Financial assets designated at fair value through profit or loss [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 178,000,000 | 0 | 0
Financial assets designated at fair value through profit or loss [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 0 | 0 | 0
Financial assets designated at fair value through profit or loss [Member] | Debt Securities [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Present-value method (Discounted future cash flows) |  |
Main Observable Inputs | - Issuer credit risk - Current market interest rates |  |
Financial assets designated at fair value through profit or loss [Member] | Debt Securities [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 178,000,000 | 0 | 0
Financial assets designated at fair value through profit or loss [Member] | Debt Securities [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 0 | 0 | 0
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 7,866,000,000 | 9,203,000,000 | 9,323,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 598,000,000 | 1,084,000,000 | 1,190,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Debt Securities [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Present-value method (Discounted future cash flows) Observed prices in non active markets |  |
Main Observable Inputs | - Issuer´s credit risk - Current market interest rates - Non active market prices |  |
Main Unobservable Inputs | - Prepayment rates - Issuer credit risk - Recovery rates |  |
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Debt Securities [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 7,832,000,000 | 9,057,000,000 | 9,221,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Debt Securities [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 493,000,000 | 604,000,000 | 711,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Equity instruments [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Comparable pricing (Observable price in a similar market) Net asset value |  |
Main Observable Inputs | - Brokers quotes - Market operations - NAVs published |  |
Main Unobservable Inputs | - NAV provided by the administrator of the fund |  |
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Equity instruments [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 34,000,000 | 146,000,000 | 113,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Equity instruments [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 105,000,000 | 480,000,000 | 479,000,000
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Derivatives [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | 1,862,000,000 |  |
Financial Assets At Fair Value Through Other Comprehensive Income [Member] | Derivatives [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets | € 8,000,000 |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Main Observable Inputs | - Exchange rates - Market quoted future prices - Market interest rates - Underlying assets prices: shares, funds, commodities - Market observable volatilities - Issuer credit spread levels - Quoted dividends - Market listed correlations |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] | Level 2 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets |  | 1,685,000,000 | 2,882,000,000
Derivatives Hedge accounting [Member] | Derivatives [Member] | Level 3 Of Fair Value Hierarchy Member |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Assets |  | € 0 | € 3,000,000
Derivatives Hedge accounting [Member] | Derivatives [Member] | Interest Rate Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Interest rate products (Interest rate Swaps, Call money Swaps and FRA): Discounted cash flows Caps/Floors: Black, Hull-White and SABR Bond options: Black Swaptions: Black, Hull-White and LGM Other Interest rate Options: Black, Hull-White and LGM Constant maturity Swaps: SABR |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] | Equity Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Future and Equity Forward: Discounted future cash flows Equity Options: Local volatility, Momentum adjustment |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] | Foreign Exchange And Gold Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Future and Equity Forward: Discounted future cash flows Foreign exchange Options: Local volatility, moments adjustment |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] | Credit Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Credit Derivatives: Default model and Gaussian copula |  |
Derivatives Hedge accounting [Member] | Derivatives [Member] | Commodities Hedge [Member] |  |  |
Main Valuation Techniques Financial Instruments Assets Line Items |  |  |
Valuation Technique used in fair value measurement assets | Commodities: Momentum adjustment and Discounted cash flows |  |

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