Employee Benefit Plans (Schedule of Net Funded Status) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 179	$ 157
Defined Benefit Plan, Benefit Obligation		256	254
Defined Benefit Plan, Funded Status of Plan, Total		(77)	(97)
Qualified Plan [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount		179	157
Defined Benefit Plan, Benefit Obligation		166	160
Defined Benefit Plan, Funded Status of Plan, Total		13	(3)
Nonqualified Plan [Member]
Defined Benefit Plan Change In Benefit Obligation [Line Items]
Defined Benefit Plan, Plan Assets, Amount	[1]	0	0
Defined Benefit Plan, Benefit Obligation	[1]	90	94
Defined Benefit Plan, Funded Status of Plan, Total	[1]	$ (90)	$ (94)

[1] For non-qualified plans, there are no required funding levels.