Acquisitions, Investments, Dispositions and Divestitures - Income from Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ (2.0)	$ 3.3	$ 218.3	$ 267.9
Pre-tax (loss)/income from operations	0.7	(29.8)	(64.5)	55.1
(Loss)/income, net of income taxes		(30.0)	(114.6)	27.3
Harrahs St. Louis [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		0	208.4	257.7
Pre-tax (loss)/income from operations		(0.8)	62.2	75.3
(Loss)/income, net of income taxes		(0.6)	(1.7)	45.8
Macau [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		2.9	3.6	3.5
Pre-tax (loss)/income from operations		(5.1)	(121.6)	(16.1)
(Loss)/income, net of income taxes		(5.5)	(107.8)	(14.4)
Alea Leeds [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		0.4	6.3	6.7
Pre-tax (loss)/income from operations		(23.9)	(5.1)	(4.1)
(Loss)/income, net of income taxes		$ (23.9)	$ (5.1)	$ (4.1)