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Benefit Obligations - Schedule of Company Commitments to Fund Benefit Obligations (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2025 USD ($)
Cash contributions to defined benefit pension plans |
Defined Benefit Plan Disclosure [Line Items] |
Total contributions year-to-date | $ 19
Total expected contributions in current fiscal year | 30
Benefit payments to nonqualified pension plans |
Defined Benefit Plan Disclosure [Line Items] |
Total contributions year-to-date | 14
Total expected contributions in current fiscal year | 18
Benefit payments to other postretirement benefit plans |
Defined Benefit Plan Disclosure [Line Items] |
Total contributions year-to-date | 5
Total expected contributions in current fiscal year | $ 3

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