Discontinued Operations Discontinued Operations - Effect on Statements of Operations of Discontinued Operations (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
		Jun. 30, 2016	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Allocated Share-based Compensation Expense		$ 30	$ 43
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]
Social and mobile games		237	455
Platform fees		69	132
Property, general, administrative, and other (1)	[1]	115	204
Total operating expenses		184	336
Pre-tax income from discontinued operations		53	119
Income tax provision		(28)	(61)
Total income from discontinued operations, net of income taxes		25	58
Allocated Share-based Compensation Expense		$ 36	$ 51

[1] Property, general, administrative, and other includes stock-based compensation expense directly identifiable with employees of the SMG Business of $36 million and $51 million for the three and six months ended June 30, 2016