Note 24 Provisions for taxes, legal contingencies and other provisions changes over the year (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes over the year of provisions for taxes, legal contingencies and other provisions [Line Items]
Provisions for taxes legal contingents and other provisions	€ 1,148	€ 1,065	€ 990
Additions of provisions for taxes legal contingents and other provisions	370	651	417
Acquisition of subsidiaries of provisions for taxes legal contingents and other provisions	0	0	0
Unused amounts reversed during the year of provisions for taxes legal contingents and other provisions	(92)	(385)	(130)
Amount used and other variations of provisions for taxes legal contingents and other provisions	(206)	(183)	(211)
Provisions for taxes legal contingents and other provisions	€ 1,220	€ 1,148	€ 1,065

Acquisition of subsidiaries of provisions for taxes legal contingents and other provisions

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Additions of provisions for taxes legal contingents and other provisions

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Changes over the year of provisions for taxes, legal contingencies and other provisions

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Provisions for taxes legal contingents and other provisions

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Unused amounts reversed during the year of provisions for taxes legal contingents and other provisions

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