Discontinued Operations - Summary of Financial Information, Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Aggregate carrying amounts - held for sale assets and liabilities
Current assets of discontinued operations	$ 0				$ 17,048				$ 0	$ 17,048
Long-term assets of discontinued operations	0				6,368				0	6,368
Current liabilities of discontinued operations	0				12,511				0	12,511
Long-term liabilities of discontinued operations	0				317				0	317
Financial Results
Income (loss) from discontinued operations, net of income taxes	$ (46)	$ (6)	$ (347)	$ 177	294	$ 164	$ 218	$ 235	(222)	911	$ 789
Net cash provided by discontinued operating activities									1,156	2,449	2,063
Net cash used in discontinued investing activities									(2,938)	(1,348)	(2,392)
Net cash provided by (used in) discontinued financing activities									(1,594)	25	77
PayPal | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Aggregate carrying amounts - held for sale assets and liabilities
Current assets of discontinued operations					16,795					16,795
Long-term assets of discontinued operations					4,506					4,506
Current liabilities of discontinued operations					12,137					12,137
Long-term liabilities of discontinued operations					243					243
Financial Results
Income (loss) from discontinued operations, net of income taxes									516	1,024	926
Net cash provided by discontinued operating activities									1,252	2,280	1,913
Net cash used in discontinued investing activities									(3,725)	(1,218)	(2,221)
Net cash provided by (used in) discontinued financing activities									(1,594)	40	76
Enterprise | Discontinued Operations, Disposed of By Sale
Aggregate carrying amounts - held for sale assets and liabilities
Current assets of discontinued operations					253					253
Long-term assets of discontinued operations					1,862					1,862
Current liabilities of discontinued operations					374					374
Long-term liabilities of discontinued operations					$ 74					74
Financial Results
Income (loss) from discontinued operations, net of income taxes									(738)	(113)	(137)
Net cash provided by discontinued operating activities									(96)	169	150
Net cash used in discontinued investing activities									787	(130)	(171)
Net cash provided by (used in) discontinued financing activities									$ 0	$ (15)	$ 1