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Investment in associates and joint ventures - Summary of changes in investments in associates and joint ventures (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of investments in associates and joint ventures [line items]
Opening balance as at 1 January	€ 1,500
Share of results	149	€ 92	€ 141
Closing balance	1,509	1,500
Associates and joint ventures
Disclosure of investments in associates and joint ventures [line items]
Opening balance as at 1 January	1,500	1,587
Additions	55	48
Revaluations	4	(8)
Share of results	149	92
Dividends received	(74)	(48)
Disposals	(89)	(10)
Impairments	(5)	(192)
Exchange rate differences	(32)	27
Other		4
Closing balance	€ 1,509	€ 1,500	€ 1,587

X

- Definition

The increase (decrease) in financial assets resulting from foreign exchange. [Refer: Financial assets]

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- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries reported in separate financial statements]

+ References

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- Definition

The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)]

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Additions in investments in associates and joint ventures.

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Disclosure of investments in associates and joint ventures.

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The amount of other changes in investments accounted for using equity method.

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