Accumulated Other Comprehensive Income - Changes in Accumulated Balances of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Tax
Accumulated other comprehensive income (loss) tax provision (benefit), beginning balance	$ (404)	$ (288)	$ (360)	$ (316)
Other comprehensive income (loss) before reclassifications, tax	156	(35)	112	(7)
Amount of gain (loss) reclassified from accumulated other comprehensive income, tax	0	0	0	0
Net current period other comprehensive income, tax	156	(35)	112	(7)
Distribution of PayPal, tax	0		0
Accumulated other comprehensive income (loss) tax provision (benefit), ending balance	(248)	(323)	(248)	(323)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated other comprehensive income (loss), net of tax, beginning balance	942	1,231	1,171	1,156
Other comprehensive income (loss) before reclassifications	(444)	(3)	(531)	38
Amount of gain (loss) reclassified from accumulated other comprehensive income	43	5	185	(29)
Other comprehensive income (loss), net tax	(487)	(8)	(716)	67
Distribution of PayPal	(12)		(12)
Accumulated other comprehensive income (loss), net of tax, ending balance	443	1,223	443	1,223
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Before Tax
Accumulated other comprehensive income (loss), before tax, beginning balance	105	(69)	168	(106)
Other comprehensive income (loss), before reclassifications, before tax	21	158	102	147
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	40	(16)	184	(64)
Net current period other comprehensive income , before tax	(19)	174	(82)	211
Distribution of PayPal, before tax	(67)		(67)
Accumulated other comprehensive income (loss), before tax, ending balance	19	105	19	105
Unrealized Gains on Investments
Accumulated Other Comprehensive Income (Loss), Before Tax
Accumulated other comprehensive income (loss), before tax, beginning balance	1,151	840	1,029	921
Other comprehensive income (loss), before reclassifications, before tax	(439)	88	(319)	21
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	3	21	1	35
Net current period other comprehensive income , before tax	(442)	67	(320)	(14)
Distribution of PayPal, before tax	3		3
Accumulated other comprehensive income (loss), before tax, ending balance	712	907	712	907
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Before Tax
Accumulated other comprehensive income (loss), before tax, beginning balance	90	748	334	657
Other comprehensive income (loss), before reclassifications, before tax	(182)	(214)	(426)	(123)
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	0	0	0	0
Net current period other comprehensive income , before tax	(182)	(214)	(426)	(123)
Distribution of PayPal, before tax	52		52
Accumulated other comprehensive income (loss), before tax, ending balance	$ (40)	$ 534	$ (40)	$ 534