Other assets - Schedule of other assets (Details) - EUR (€) € in Millions	Dec. 31, 2023	Dec. 31, 2022
Other assets [abstract]
Net defined benefit assets	€ 554	€ 617
Investment properties	14	18
Property development and obtained from foreclosures	32	34
Prepayments	438	366
Accrued assets	523	551
Amounts to be settled	3,869	5,191
Other	1,687	2,073
Other assets total	€ 7,117	€ 8,850

The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of items that have been transmitted from other banks but not yet been received and processed by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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- Definition

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

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Receivables that represent amounts paid for goods and services before they have been delivered.

+ References

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- Definition

The amount of surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]]

+ References

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- Definition

The amount of assets accrued as part of the total other assets

+ References

No definition available.

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- References

No definition available.

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- Definition

Miscellaneous other assets.

+ References

No definition available.

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- Definition

The amount transferred from investment property under construction or development and foreclosures to completed investment property.

+ References

No definition available.

+ Details

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Period Type:	instant