Employee Benefit Plans (Reconciliation of Assets Measured at Fair Value on a Recurring Basis) (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at prior measurement date		$ 11
Sales		(12)
Total gains and other, net		$ 1
Transfer of Level 3 assets from other classifications	$ 95
Plan assets at measurement date	$ 95