Income taxes - Unrecognized (Details) - EUR (€) € in Millions	Dec. 31, 2024	Dec. 31, 2023
Major components of tax expense (income) [abstract]
Temporary differences	€ 1,810	€ 1,743
Tax losses carried forward	19,770	19,482
Tax credits	273	344
Total	€ 21,853	€ 21,569

The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 81
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_e&doctype=Standard
-URIDate 2024-03-27

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- References

No definition available.

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- Definition

The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]]

+ References

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- Definition

The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]

+ References

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- Definition

The amount of deductible temporary differences, unused tax losses, and unused tax credits for which no deferred tax asset is recognised in the statement of financial position.

+ References

No definition available.

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