Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,623	$ 1,344	$ 3,257	$ 2,595
Other comprehensive income (loss):
Net unrealized securities (losses) gains, net of tax	(7)	0	(18)	6
Foreign currency translation adjustments, net of tax	(96)	33	(66)	349
Net unrealized Pension and other postretirement benefits, net of tax	1	9	29	1
Other comprehensive income (loss)	(102)	42	(55)	356
Comprehensive income	$ 1,521	$ 1,386	$ 3,202	$ 2,951