Balance Sheet Components (Effects on Net Income of Amounts Reclassified from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 17,727		$ 15,955	$ 34,985	$ 31,375
Interest and other income, net	131		145	288	502
Provision for income taxes	(1,025)	$ (1,089)	(984)	(2,114)	(1,887)
Net income	3,931	$ 3,515	3,351	7,446	6,722
Gains (Losses) Reclassified from AOCI to the Consolidated Statement of Income
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Net income	379		44	637	116
Gains (Losses) Reclassified from AOCI to the Consolidated Statement of Income | Unrealized gains on available-for-sale investments
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	53		48	85	122
Provision for income taxes	(3)		(8)	(8)	(15)
Net income	50		40	77	107
Gains (Losses) Reclassified from AOCI to the Consolidated Statement of Income | Unrealized gains on cash flow hedges
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	(143)		(3)	(224)	(6)
Net income	329		4	560	9
Foreign exchange contracts | Gains (Losses) Reclassified from AOCI to the Consolidated Statement of Income | Unrealized gains on cash flow hedges
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Revenue	471		6	782	14
Interest rate contracts | Gains (Losses) Reclassified from AOCI to the Consolidated Statement of Income | Unrealized gains on cash flow hedges
Reclassification Out Of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	$ 1		$ 1	$ 2	$ 1