CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 4,988	$ 3,064
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net of tax	94	60
Change in unrealized gain/loss on available-for-sale investments and other, net of tax	(161)	17
Comprehensive income	$ 4,921	$ 3,141