Income Taxes Reconciliation of Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current Provision:
Federal	$ 2,629	$ 2,897	$ 3,597
State and local	319	219	314
Foreign	564	404	254
Total current provision	3,512	3,520	4,165
Deferred provision (benefit)	230	42	(965)
Total provision for income taxes	$ 3,742	$ 3,562	$ 3,200