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Pension and Other Postretirement Benefits (Details 4) - Pension Plans - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
United Kingdom |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 357 | $ 345 | $ 360
United Kingdom | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 2 |
United Kingdom | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 14 |
United Kingdom | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 78 |
United Kingdom | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 124 |
United Kingdom | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 52 |
United Kingdom | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 31 |
United Kingdom | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 4 |  |
United Kingdom | Pooled Property Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 43 |
United Kingdom | Receivable From Redemption |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 1 |
United Kingdom | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 352 |  |
United Kingdom | Fair Value, Inputs, Level 1, 2 and 3 | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 356 | 301 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 3 | 1 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 1 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 3 |  |
United Kingdom | Quoted Prices in Active Markets (Level 1) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 1 | 300 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 1 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 14 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 78 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 124 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 52 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 31 |
United Kingdom | Significant Other Observable Inputs (Level 2) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 1 |  |
United Kingdom | Significant Other Observable Inputs (Level 2) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 352 | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Significant Unobservable Inputs (Level 3) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Significant Unobservable Inputs (Level 3) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 352 |  |
United Kingdom | Fair Value Measured at Net Asset Value Per Share |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 1 | 344 |
North America |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 273 | 299 | $ 313
North America | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 99 | 2 |
North America | Short-Term Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 25 |  |
North America | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 41 |
North America | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 4 | 10 |
North America | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 2 | 90 |
North America | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 35 | 100 |
North America | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 12 | 14 |
North America | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 33 | 42 |
North America | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 63 |  |
North America | Fair Value, Inputs, Level 1, 2 and 3 | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 273 | 299 |
North America | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 45 | 98 |
North America | Quoted Prices in Active Markets (Level 1) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 1 |
North America | Quoted Prices in Active Markets (Level 1) | Short-Term Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Quoted Prices in Active Markets (Level 1) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 41 |
North America | Quoted Prices in Active Markets (Level 1) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Quoted Prices in Active Markets (Level 1) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Quoted Prices in Active Markets (Level 1) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Quoted Prices in Active Markets (Level 1) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 12 | 14 |
North America | Quoted Prices in Active Markets (Level 1) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 33 | 42 |
North America | Quoted Prices in Active Markets (Level 1) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 165 | 201 |
North America | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 99 | 1 |
North America | Significant Other Observable Inputs (Level 2) | Short-Term Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 25 |  |
North America | Significant Other Observable Inputs (Level 2) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
North America | Significant Other Observable Inputs (Level 2) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 4 | 10 |
North America | Significant Other Observable Inputs (Level 2) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 2 | 90 |
North America | Significant Other Observable Inputs (Level 2) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 35 | 100 |
North America | Significant Other Observable Inputs (Level 2) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Other Observable Inputs (Level 2) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Other Observable Inputs (Level 2) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 63 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Short-Term Investments |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Significant Unobservable Inputs (Level 3) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
North America | Significant Unobservable Inputs (Level 3) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Significant Unobservable Inputs (Level 3) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | $ 0 |
North America | Significant Unobservable Inputs (Level 3) | Buy-In Annuity Contracts |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 63 |  |

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