Income Taxes Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current Provision:
Federal	$ 2,897	$ 3,597	$ 4,302
State and local	219	314	312
Foreign	404	254	95
Total current provision	3,520	4,165	4,709
Deferred provision (benefit)	42	(965)	81
Total provision for income taxes	$ 3,562	$ 3,200	$ 4,790