Acquisitions, Investments, Dispositions and Divestitures - Income from Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ 1.3	$ 3.8
Pre-tax income/(loss) from operations	(15.9)	(44.8)
Income/(loss), net of income taxes	(15.9)	(42.0)
Golden Nugget Casino [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	1.3	2.1
Pre-tax income/(loss) from operations	(15.4)	(1.0)
Income/(loss), net of income taxes	(15.4)	(1.0)
Harrahs St. Louis [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	0
Pre-tax income/(loss) from operations	0	(0.7)
Income/(loss), net of income taxes	0	(0.4)
Macau [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	1.0
Pre-tax income/(loss) from operations	0	(20.7)
Income/(loss), net of income taxes	0	(18.2)
Alea Leeds [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	0	0.7
Pre-tax income/(loss) from operations	(0.5)	(22.4)
Income/(loss), net of income taxes	$ (0.5)	$ (22.4)