Employee Benefit Plans (Expected Future Benefit Payments To Be Paid) (Details) $ in Millions	Dec. 31, 2021 USD ($)
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	62
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	67
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	73
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	80
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	474
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	15
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	14
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	13
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	13
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	11
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 46