Staff costs - Schedule of detail of staff costs (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Classes of employee benefits expense [abstract]
Wages and salaries	€ 9,563	€ 8,466	€ 8,070
Social Security costs	1,441	1,323	1,277
Additions to provisions for defined benefit pension plans (note 25)	65	73	76
Contributions to defined contribution pension funds	296	286	283
Other Staff costs	1,182	1,068	1,077
Total staff costs	€ 12,547	€ 11,216	€ 10,783

No definition available.

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The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment.

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The amount of employee expenses that the entity does not separately disclose in the same statement or note.

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- Definition

The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [member]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss]

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The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods.

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- Definition

A class of employee benefits expense that represents social security contributions. [Refer: Employee benefits expense]

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A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense]

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