CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 6,732	$ 5,061	$ 15,682	$ 14,145
Other comprehensive income:
Change in foreign currency translation adjustment	441	129	1,457	166
Available-for-sale investments:
Change in net unrealized gains (losses)	578	71	803	627
Less: reclassification adjustment for net (gains) losses included in net income	47	(46)	98	137
Net change (net of tax effect of $7, $0, $191, and $0)	625	25	901	764
Cash flow hedges:
Change in net unrealized gains (losses)	(209)	32	(668)	148
Less: reclassification adjustment for net (gains) losses included in net income	125	(67)	(34)	(236)
Net change (net of tax effect of $20, $50, $29, and $342)	(84)	(35)	(702)	(88)
Other comprehensive income	982	119	1,656	842
Comprehensive income	$ 7,714	$ 5,180	$ 17,338	$ 14,987