Property and Equipment, net (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 6,266.8	$ 7,208.8
Buildings, riverboats, and improvements	6,668.1	8,725.7
Furniture, fixtures, and equipment	2,297.7	2,491.0
Construction in progress	824.6	378.3
Total, Gross	16,057.2	18,803.8
Less: accumulated depreciation	(2,819.3)	(3,102.1)
Property and equipment, net	$ 13,237.9	$ 15,701.7