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Pension, Postretirement and Savings Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total expense related to defined contribution plans | $ 287 | $ 253 | $ 204
Other Postretirement Benefits Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other comprehensive income (loss), defined benefit plan, after reclassification adjustment, before tax | 10 | 8 |
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other comprehensive income (loss), defined benefit plan, after reclassification adjustment, before tax | $ (14) | $ (35) |

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