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Employee Benefits- Fair Value of Investments (Details) - Pension Plan - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 246 | $ 253 | $ 228
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 232 |  |
Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 14 |  |
Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap value |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 14 |  |
Large-cap value | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 14 |  |
Large-cap value | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap value | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap growth |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 28 |  |
Large-cap growth | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 28 |  |
Large-cap growth | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap growth | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap core |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 21 |  |
Large-cap core | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 21 |  |
Large-cap core | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large-cap core | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Mid-cap core |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 17 |  |
Mid-cap core | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 17 |  |
Mid-cap core | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Mid-cap core | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Small-cap core |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 17 |  |
Small-cap core | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 17 |  |
Small-cap core | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Small-cap core | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
International growth |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 18 |  |
International growth | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 18 |  |
International growth | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
International growth | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
International value |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 12 |  |
International value | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 12 |  |
International value | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
International value | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Fixed Income Funds, Intermediate Core Plus |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 96 |  |
Fixed Income Funds, Intermediate Core Plus | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 96 |  |
Fixed Income Funds, Intermediate Core Plus | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Fixed Income Funds, Intermediate Core Plus | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Company common stock |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9 |  |
Company common stock | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 9 |  |
Company common stock | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Company common stock | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large cap value |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 14 |  |
Large cap value | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 0 |  |
Large cap value | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | 14 |  |
Large cap value | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plan, Plan Assets, Category [Line Items] |  |  |
Defined Benefit Plan, Plan Assets, Amount | $ 0 |  |

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