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Employee Benefit Plans (Expected Future Benefit Payments To Be Paid) (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months $ 69
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 75
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 82
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 88
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 94
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 559
Other Postretirement Benefits Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 14
Defined Benefit Plan, Expected Future Benefit Payment, Year Two 13
Defined Benefit Plan, Expected Future Benefit Payment, Year Three 11
Defined Benefit Plan, Expected Future Benefit Payment, Year Four 11
Defined Benefit Plan, Expected Future Benefit Payment, Year Five 10
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter $ 41