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Pension and Other Postretirement Benefits (Details 4) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Pooled Property Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] |  | Fair Value Measured at Net Asset Value Per Share [Member] |
Funds measured at NAV |  |  |
Pension and Other Postretirement Benefits |  |  |
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] | Fair Value Measured at Net Asset Value Per Share [Member] |  |
United Kingdom | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 320 | $ 505 | $ 491
Total assets at fair value | 316 |  |
Receivable from redemption | 4 |  |
United Kingdom | Pension Plans | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 41 |  |
United Kingdom | Pension Plans | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 15 |
United Kingdom | Pension Plans | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 122 |
United Kingdom | Pension Plans | Fixed income: Pooled UK government index-linked securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 78 |
United Kingdom | Pension Plans | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 88 |
United Kingdom | Pension Plans | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 30 | 67 |
United Kingdom | Pension Plans | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 67 |  |
United Kingdom | Pension Plans | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 47 |  |
United Kingdom | Pension Plans | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 44 | 52 |
United Kingdom | Pension Plans | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 26 |  |
United Kingdom | Pension Plans | Pooled Property Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 83 |
United Kingdom | Pension Plans | Funds measured at NAV |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 61 |  |
United Kingdom | Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 255 | 422 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 9 | 8 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 8 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | 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 | Pension Plans | 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 | Pension Plans | Quoted Prices in Active Markets (Level 1) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Quoted Prices in Active Markets (Level 1) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 9 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 246 | 414 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 41 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 7 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 122 |
United Kingdom | Pension Plans | 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 | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 88 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 30 | 67 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 67 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 47 |  |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 44 | 52 |
United Kingdom | Pension Plans | Significant Other Observable Inputs (Level 2) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 17 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Cash [Member] |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Target Return Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | 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 | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Pooled fixed income funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Liability-driven investment funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled UK Government Securities Funds Index-Linked Securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Global Debt Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Diversified Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
United Kingdom | Pension Plans | Significant Unobservable Inputs (Level 3) | Cash and Cash Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Pension Plans |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 273 | 830 | $ 846
North America | Pension Plans | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 3 | 14 |
North America | Pension Plans | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 28 | 157 |
North America | Pension Plans | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 16 | 34 |
North America | Pension Plans | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 6 | 7 |
North America | Pension Plans | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 81 | 103 |
North America | Pension Plans | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 109 | 460 |
North America | Pension Plans | Fixed income: U.S.Treasury bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 14 | 61 |
North America | Pension Plans | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 16 |  |
North America | Pension Plans | Accruals and payables—net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Pension Plans | Accruals and payables—net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets |  | (6) |
North America | Pension Plans | 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 | 836 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 44 | 228 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 2 | 10 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 28 | 157 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | 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 | Pension Plans | 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 | Pension Plans | 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 | 14 | 61 |
North America | Pension Plans | Quoted Prices in Active Markets (Level 1) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 |  |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 229 | 608 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 1 | 4 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 16 | 34 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 6 | 7 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Government and agency securities |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 81 | 103 |
North America | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income: Corporate bonds and notes |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 109 | 460 |
North America | Pension Plans | 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 | Pension Plans | Significant Other Observable Inputs (Level 2) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 16 |  |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Defined Benefit Plan, Assets Before Receivables, Net |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Equity mutual funds: Index equity |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Pooled Equity Funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income: Other |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | 0 | 0 |
North America | Pension Plans | 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 | Pension Plans | 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 | Pension Plans | 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 | Pension Plans | Significant Unobservable Inputs (Level 3) | Fixed income mutual funds |  |  |
Pension and Other Postretirement Benefits |  |  |
Fair value of plan assets | $ 0 |  |

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