Acquisitions, Investments, Dispositions and Divestitures - Income from Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ 163	$ 343	$ 613
Pre-tax (loss)/income from operations	(213)	(239)	(520)
(Loss)/income, net of income taxes	(192)	(207)	(400)
Showboat Atlantic City [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	115	199	228
Pre-tax (loss)/income from operations	(59)	(66)	(450)
(Loss)/income, net of income taxes	(38)	(83)	(281)
Harrahs Tunica [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	46	130	155
Pre-tax (loss)/income from operations	(120)	(140)	(3)
(Loss)/income, net of income taxes	(120)	(91)	(2)
Disposal Group Other [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	2	14	230
Pre-tax (loss)/income from operations	(34)	(33)	(67)
(Loss)/income, net of income taxes	$ (34)	$ (33)	$ (117)