Income Taxes (Components of income tax expense and reconciliation of effective tax rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Federal	$ 78	$ 290	$ 97
Foreign	26	15	(6)
State and local	88	65	45
Current income tax expense	192	370	136
Deferred
Federal	260	(107)	185
Foreign	14	6	14
State and local	(6)	(20)	5
Deferred income tax expense (benefit)	268	(121)	204
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed tax at statutory tax rate	388	239	318
State income taxes, net of federal tax benefit	64	31	43
Other permanent items	1	(3)	(17)
Change in federal valuation allowance	0	(22)	(3)
Foreign tax rate differential	7	4	(1)
Total	$ 460	$ 249	$ 340