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Provisions, income tax liabilities and other liabilities - Summary of Weighted Average Duration of Obligation for Pensions and Other Long-term Benefits in Principal Countries (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of defined benefit plans [line items] |  |  |
Weighted average duration in main countries | 10 years |  |
France |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Weighted average duration in main countries | 10 years | 12 years | 13 years
Germany |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Weighted average duration in main countries | 12 years | 16 years | 16 years
US |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Weighted average duration in main countries | 11 years | 15 years | 16 years
UK |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Weighted average duration in main countries | 13 years | 17 years | 18 years

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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 147 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_147_c&doctype=Standard -URIDate 2021-03-24 + Details
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