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Retirement Benefits (Schedule Of Expected Payments From Qualified Trust And Company Funds) (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension Benefits | Paid from Qualified Trust Funds  
Defined Benefit Plan Disclosure [Line Items]  
2024 $ 277
2025 281
2026 287
2027 290
2028 293
2029 – 2033 1,488
Pension Benefits | Paid from Company Funds  
Defined Benefit Plan Disclosure [Line Items]  
2024 3
2025 3
2026 3
2027 3
2028 2
2029 – 2033 13
Postretirement Benefits | Paid from Qualified Trust Funds  
Defined Benefit Plan Disclosure [Line Items]  
2024 56
2025 58
2026 58
2027 58
2028 58
2029 – 2033 289
Postretirement Benefits | Paid from Company Funds  
Defined Benefit Plan Disclosure [Line Items]  
2024 3
2025 3
2026 3
2027 3
2028 3
2029 – 2033 $ 15