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Note 2 (Tables)
6 Months Ended
Jun. 30, 2021
Principles Of Consoldiation, Acounting policies and measurement bases applied and recent IFRS pronouncements [Abstract]  
Hedging Intsruments Affected By IBOR [Table Text Block]
Millions of Euros
Loans & AdvancesDebt Securities AssetsDebt Securities Issued (Liabilities)DepositsDerivatives (notional)
EONIA with maturity > December 31, 2021— — 9,213 102,203 
LIBOR ex USD & LIBOR USD 1W/2M with maturity > December 31, 20213,666 — 244 1,215 37,695 
LIBOR USD with maturity > June 30, 202317,308 153 1,975 2,146 372,575 
Total20,980 153 2,219 12,575 512,473