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Structured entities - Additional information (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2013
Disclosure of information about consolidated structured entities [line items]
Transfer of financial assets			€ 2,000
Fee income recognised	€ 20	€ 19
Combined interest and FX rate risk
Disclosure of information about consolidated structured entities [line items]
Fair value of swap	(11)	(26)
Financial assets, amounts recognized in income statement	14	14
Fee income recognised	1	1
Mont Blanc
Disclosure of information about consolidated structured entities [line items]
Undrawn borrowing facilities	3,119	2,268
Borrowing facility	0	0
Total for all consolidated structured entities | Securitisations
Disclosure of information about consolidated structured entities [line items]
Securitisations	74,000	67,000
Securitisation, issued externally | Securitisations
Disclosure of information about consolidated structured entities [line items]
Securitisations	€ 4,000	€ 2,000

X

- Definition

The amount, at the time of transfer, of all assets transferred to structured entities. [Refer: Total for all unconsolidated structured entities [member]]

+ References

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The fair value of financial assets. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2024-01-01
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- Definition

The gains (losses) including exchange differences recognised in profit or loss on the fair value measurement of assets. [Refer: At fair value [member]]

+ References

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-Name IFRS
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- Definition

The amount of income from structured entities including recurring and non-recurring fees, interest, dividends, gains or losses on the remeasurement or derecognition of interests in structured entities and gains or losses from the transfer of assets and liabilities to the structured entity. [Refer: Total for all unconsolidated structured entities [member]]

+ References

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-Name IFRS
-Number 12
-IssueDate 2024-01-01
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- Definition

The amount of borrowings that the entity does not separately disclose in the same statement or note. [Refer: Borrowings]

+ References

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- Definition

The amount of financial or other support (for example, purchasing assets of, or instruments issued by, the structured entity) provided to a structured entity without having a contractual obligation to do so, including assistance in obtaining financial support. [Refer: Total for all subsidiaries [member]; Total for all unconsolidated structured entities [member]]

+ References

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- Definition

The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

+ References

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