Dispositions and Divestitures - Income from Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ 0	$ 60	$ 0	$ 130
Pre-tax loss from operations	0	(47)	(7)	(142)
Loss, net of income taxes	0	(45)	(7)	(129)
Showboat Atlantic City [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	46	0	82
Pre-tax loss from operations	0	(4)	(6)	(12)
Loss, net of income taxes	0	(3)	(6)	1
Harrahs Tunica [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	14	0	46
Pre-tax loss from operations	0	(26)	0	(96)
Loss, net of income taxes	0	(26)	0	(96)
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 loss from operations	0	(17)	(1)	(34)
Loss, net of income taxes	$ 0	$ (16)	$ (1)	$ (34)