Income Taxes (Components Of Income Tax Provisions (Benefits)) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current
Federal	$ 715	$ 681	$ 189
State and local	178	98	27
Foreign	22	(6)	(1)
Total	915	773	215
Deferred
Federal	2	(1,270)	336
State and local	61	33	57
Foreign	(16)	4	1
Total	47	(1,233)	394
Total
Federal	717	(589)	525
State and local	239	131	84
Foreign	6	(2)	0
Total	$ 962	$ (460)	$ 609