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Equity - Schedule of changes in currency translation reserve (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of equity [Line Items]
Opening balance	€ 2,767	€ 2,192
Closing balance	687	2,767	€ 2,192
Currency translation reserve
Disclosure of equity [Line Items]
Opening balance	(2,527)	(2,395)	(3,483)
Unrealised revaluations	(222)	183	(7)
Realised gains/losses transferred to the statement of profit or loss	1		4
Exchange rate differences	763	(316)	444
Closing balance	€ (1,986)	€ (2,527)	(2,395)
Currency translation reserve | Impact IAS 29 on opening balance
Disclosure of equity [Line Items]
Opening balance			€ 647

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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

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- Definition

The gains (losses) excluding exchange differences, recognised in profit or loss, on the fair value measurement of the entity's own equity instruments. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2024-01-01
-Paragraph 93
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- Definition

The gains (losses) on exchange differences, recognised in profit or loss, on the fair value measurement of the entity's own equity instruments. [Refer: At fair value [member]]

+ References

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- Definition

A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]

+ References

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-IssueDate 2024-01-01
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- Definition

The increase (decrease) in reserves resulting from revaluations to fair value.

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