Property and Equipment, net - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended				1 Months Ended	3 Months Ended	12 Months Ended	1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Mississippi [Member]	Dec. 31, 2012 Atlantic City [Member]	Jun. 30, 2012 Macau [Member]	Dec. 31, 2012 Macau [Member]	Dec. 31, 2012 Building and building improvements [Member] Atlantic City [Member]	Dec. 31, 2012 Land [Member] Atlantic City [Member]	Dec. 31, 2012 Furniture, fixtures, and equipment [Member] Atlantic City [Member]
Property, Plant and Equipment [Line Items]
Interest capitalized	$ 38.2	$ 22.8	$ 1.4
Recorded impairment of tangible assets				$ 180.5	$ 450.0	$ 101.0		$ 251.0	$ 190.0	$ 9.0
Remaining term of land concession for divesting investment						35 years	35 years