Acquisitions, Investments, Dispositions and Divestitures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended				9 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Showboat Atlantic City [Member]	Sep. 30, 2014 Showboat Atlantic City [Member]	Sep. 30, 2014 CIE RMG BEL [Member]	Sep. 30, 2014 CIE RMG BEL [Member]	Mar. 31, 2014 Harrahs Tunica [Member]	Sep. 30, 2013 Harrahs Tunica [Member]	Sep. 30, 2014 Harrahs Tunica [Member]	Sep. 30, 2014 Golden Nugget Casino [Member]	Sep. 30, 2014 Claridge Hotel Tower, Atlantic City [Member]	Dec. 31, 2013 Claridge Hotel Tower, Atlantic City [Member]	Sep. 30, 2014 Council Bluffs, Iowa [Member]	Sep. 30, 2014 AC Conference Center [Member]	Sep. 30, 2014 Accrued Liabilities [Member] Golden Nugget Casino [Member]
Business Acquisition, Dispositions and Divestitures [Line Items]
Business Exit Costs						$ 15.8	$ 4.8					$ 10.9	$ 13.1			$ 65.0		$ 10.2
Goodwill, Impairment Loss			304.2						15.5
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net								4.5	4.5
Gain/(loss) on early extinguishment of debt								1.4
Impairment of intangible and tangible assets	498.6	818.6	548.8	945.9								68.0	1.7
Tangible Asset Impairment Charges										66.8	112.3
Proceeds received from sale of assets			32.4	0										12.5
Assets held for sale	2.9		2.9		11.9										11.9
Business exit costs fair value																41.4
Book value of Assets Sold																	$ 81.7