Discontinued Operations Discontinued Operations - Income/(loss) from Operations (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating expenses		$ 410	$ 129	$ 748	$ 371
Pre-tax income/(loss) from discontinued operations		3,973	55	4,091	156
Income/(loss), net of income taxes		3,293	36	3,351	106
Social and Mobile Games [Member] | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		222	184	678	527
Operating expenses	[1]	410	129	748	364
Gain from discontinued operations		4,161	0	4,161	0
Pre-tax income/(loss) from discontinued operations		3,973	55	4,091	163
Income/(loss), net of income taxes		3,293	36	3,351	113
Other [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Operating expenses		0	0	0	7
Pre-tax income/(loss) from discontinued operations		0	0	0	(7)
Income/(loss), net of income taxes		$ 0	$ 0	$ 0	$ (7)

[1] Operating expenses primarily consist of platform fees and property, general, administrative, and other.