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Employee Benefit Plans (Information About The Expected Cash Flows For The Qualified and Non-Qualified Pension Plans) (Details)
Dec. 31, 2023
USD ($)
Qualified Plan [Member] | Pension Plan [Member]  
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]  
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year $ 0
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 122,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 124,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 125,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 127,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 126,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 602,000,000
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]  
Defined Benefit Plan, Expected Future Employer Contributions [Abstract]  
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year 9,000,000
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 9,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 9,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 10,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 9,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 9,000,000
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter $ 35,000,000