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Retirement Benefits (Benefit Payments) (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Other Postretirement Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | $ 14
2025 | 14
2026 | 13
2027 | 12
2028 | 32
2029 – 2033 | 23
Defined Benefit Plan, Funded Plan | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 1
2025 | 1
2026 | 1
2027 | 1
2028 | 1
2029 – 2033 | 7
Defined Benefit Plan, Unfunded Plan | Pension Benefits |
Defined Benefit Plan Disclosure [Line Items] |
2024 | 3
2025 | 3
2026 | 2
2027 | 2
2028 | 2
2029 – 2033 | $ 5

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