Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Tax
Beginning balance, tax	$ (360)	$ (316)
Other comprehensive income before reclassifications, tax	50	(44)
Amount of gain (loss) reclassified from accumulated other comprehensive income, tax	0	0
Net current period other comprehensive income, tax	50	(44)
Distribution of PayPal, tax	0
Ending balance, tax	(310)	(360)	$ (316)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance, net of tax	1,171	1,156
Other comprehensive income before reclassifications, net of tax	(428)	31
Amount of gain (loss) reclassified form accumulated other comprehensive income, net of tax	205	16
Other comprehensive income (loss), net of tax	(633)	15	300
Distribution of PayPal, net of tax	(12)
Ending balance, net of tax	526	1,171	1,156
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance, before Tax	168	(106)
Other comprehensive income before reclassifications, before tax	139	238
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	204	(36)
Net current period other comprehensive income, before tax	(65)	274
Distribution of PayPal, before tax	(67)
Ending balance, before Tax	36	168	(106)
Unrealized Gains on Investments
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance, before Tax	1,029	921
Other comprehensive income before reclassifications, before tax	(186)	160
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	1	52
Net current period other comprehensive income, before tax	(187)	108
Distribution of PayPal, before tax	3
Ending balance, before Tax	845	1,029	921
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance, before Tax	334	657
Other comprehensive income before reclassifications, before tax	(431)	(323)
Amount of gain (loss) reclassified from accumulated other comprehensive income, before tax	0	0
Net current period other comprehensive income, before tax	(431)	(323)
Distribution of PayPal, before tax	52
Ending balance, before Tax	$ (45)	$ 334	$ 657