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, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Plan assets at prior measurement date	$ 62	$ 95
Sales	(8)	(18)
Total gains and other, net	22	(8)
Transfer of Level 3 assets from other classifications		(7)
Plan assets at measurement date	$ 76	$ 62