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Retirement Benefits (Schedule Of Expected Payments From Qualified Trust And Company Funds) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Pension Benefits | Paid From Qualified Trust  
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 267
2023 274
2024 279
2025 284
2026 288
2027 – 2031 1,476
Pension Benefits | Paid From Company Funds  
Defined Benefit Plan Disclosure [Line Items]  
2022 2
2023 2
2024 3
2025 3
2026 3
2027 – 2031 12
Postretirement Benefits | Paid From Qualified Trust  
Defined Benefit Plan Disclosure [Line Items]  
2022 59
2023 60
2024 61
2025 61
2026 60
2027 – 2031 296
Postretirement Benefits | Paid From Company Funds  
Defined Benefit Plan Disclosure [Line Items]  
2022 2
2023 2
2024 2
2025 2
2026 2
2027 – 2031 $ 9