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Provisions, income tax liabilities and other liabilities - Service Cost for Pension and Other post-employment Benefit Plans, by Geographical Region (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
France |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | € (156) | € (106) | € 23
Germany |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | (205) | (113) | 121
US |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | (382) | (156) | 22
UK |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 131 | (237) | 115
Pensions and other post-employment benefits |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 193 | 227 | 221
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | (68) | 5 | (199)
Net interest cost/(income) including administration costs and taxes paid during the period | 49 | 49 | 69
Contributions from plan members | (6) | (6) | (7)
Expense/(gain) recognized directly in profit or loss | 168 | 276 | 84
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 650 | 685 | (266)
Expense/(gain) for the period | (482) | (409) | 350
Pensions and other post-employment benefits | France |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 61 | 72 | 65
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | (60) | 2 | (87)
Net interest cost/(income) including administration costs and taxes paid during the period | 10 | 5 | 7
Contributions from plan members | 0 | 0 | 0
Expense/(gain) recognized directly in profit or loss | 11 | 80 | (15)
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 156 | 106 | (23)
Expense/(gain) for the period | (145) | (26) | 8
Pensions and other post-employment benefits | Germany |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 44 | 47 | 49
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | 2 | 0 | 10
Net interest cost/(income) including administration costs and taxes paid during the period | 7 | 5 | 13
Contributions from plan members | 0 | 0 | 0
Expense/(gain) recognized directly in profit or loss | 53 | 52 | 72
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 204 | 113 | (121)
Expense/(gain) for the period | (151) | (61) | 193
Pensions and other post-employment benefits | US |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 50 | 57 | 51
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | 1 | 0 | (123)
Net interest cost/(income) including administration costs and taxes paid during the period | 30 | 27 | 34
Contributions from plan members | 0 | 0 | 0
Expense/(gain) recognized directly in profit or loss | 81 | 84 | (38)
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 382 | 157 | (22)
Expense/(gain) for the period | (301) | (73) | (16)
Pensions and other post-employment benefits | UK |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 0 | 0 | 0
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | (6) | 3 | 0
Net interest cost/(income) including administration costs and taxes paid during the period | (7) | 3 | 5
Contributions from plan members | 0 | 0 | 0
Expense/(gain) recognized directly in profit or loss | (13) | 6 | 5
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | (130) | 236 | (115)
Expense/(gain) for the period | 117 | (230) | 120
Pensions and other post-employment benefits | Other |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost | 38 | 51 | 56
(Gains)/losses related to plan amendments, curtailments or settlements not specified in the terms of the plan | (5) | 0 | 1
Net interest cost/(income) including administration costs and taxes paid during the period | 9 | 9 | 10
Contributions from plan members | (6) | (6) | (7)
Expense/(gain) recognized directly in profit or loss | 36 | 54 | 60
Remeasurement of net defined-benefit (asset)/ liability (actuarial gains and losses) | 38 | 73 | 15
Expense/(gain) for the period | € (2) | € (19) | € 45

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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_f&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_a&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2021-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2021-en-r&anchor=para_141_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Total expense for pensions and other post-employment benefits recognized directly in profit or loss. + References No definition available. + Details
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