Property and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 9,161	$ 9,103
Less: accumulated depreciation	(1,601)	(1,505)
Property and equipment, net	7,560	7,598
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,584	3,584
Buildings, riverboats, and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,153	4,134
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,351	1,326
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 73	$ 59