Dispositions and Divestitures - Income from Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ 0	$ 34	$ 0	$ 163
Pre-tax income/(loss) from operations	0	(46)	(7)	(189)
Income/(loss), net of income taxes	0	(48)	(7)	(178)
Showboat Atlantic City [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	34	0	115
Pre-tax income/(loss) from operations	0	(24)	(6)	(36)
Income/(loss), net of income taxes	0	(26)	(6)	(25)
Harrahs Tunica [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	0	0	46
Pre-tax income/(loss) from operations	0	(23)	0	(119)
Income/(loss), net of income taxes	0	(23)	0	(119)
Other [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	0	0	2
Pre-tax income/(loss) from operations	0	1	(1)	(34)
Income/(loss), net of income taxes	$ 0	$ 1	$ (1)	$ (34)