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Provisions, income tax liabilities and other liabilities - Summary of Financial and Demographic Assumptions (Details) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of defined benefit plans [line items] |  |  |  |
Weighted average duration of defined benefit obligation |  | 10 years |  |
Minimum Plan 1 |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Weighted average duration of defined benefit obligation |  | 0 years |  |
Maximum Plan 1 |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Weighted average duration of defined benefit obligation |  | 7 years |  |
Minimum plan 2 |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Weighted average duration of defined benefit obligation |  | 7 years |  |
Maximum plan 2 |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Weighted average duration of defined benefit obligation |  | 10 years |  |
France |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
General inflation rate | [1] | 2.10% | 2.20% | 2.50%
Pension benefit indexation |  | 2.10% | 2.20% |
Weighted average duration of defined benefit obligation |  | 11 years | 10 years | 10 years
France | Bottom of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 2.95% | 2.95% | 3.55%
Pension benefit indexation |  |  |  | 2.50%
Retirement age |  | 62 years | 62 years | 62 years
France | Top of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 3.40% | 3.15% | 3.75%
Retirement age |  | 67 years | 67 years | 67 years
Germany |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
General inflation rate | [1] | 2.10% | 2.20% | 2.50%
Pension benefit indexation |  | 2.10% | 2.20% | 2.50%
Retirement age |  | 63 years | 63 years | 63 years
Weighted average duration of defined benefit obligation |  | 12 years | 12 years | 12 years
Germany | Bottom of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 2.95% | 2.95% | 3.55%
Germany | Top of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 3.40% | 3.15% | 3.75%
US |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 5.45% | 4.75% | 4.90%
Weighted average duration of defined benefit obligation |  | 10 years | 11 years | 11 years
US | Bottom of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Healthcare cost inflation rate | [4] | 4.00% | 4.00% | 3.29%
Retirement age |  | 55 years | 55 years | 55 years
US | Top of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Healthcare cost inflation rate | [4] | 5.93% | 9.75% | 6.56%
Retirement age |  | 70 years | 70 years | 70 years
UK |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Discount rate | [2],[3] | 5.50% | 4.50% | 4.75%
General inflation rate | [1] | 3.20% | 3.05% | 3.25%
Pension benefit indexation |  | 3.00% | 2.90% | 3.00%
Weighted average duration of defined benefit obligation |  | 11 years | 13 years | 13 years
UK | Bottom of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Retirement age |  | 60 years | 60 years | 60 years
UK | Top of range |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Retirement age |  | 65 years | 65 years | 65 years
[1] | (c)Inflation for the euro zone is determined using a multi-criterion method.
[2] | (a)The discount rates used were based on market rates for high quality corporate bonds with a duration close to that of the expected benefit payments under the plans. The benchmarks used to determine discount rates were the same for all periods presented.
[3] | (b)The rate depends on the duration of the plan (0 to 7 years, 7 to 10 years, or more than 10 years).
[4] | (d)No post-employment healthcare benefits are provided in France since 2020, Germany and UK

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