Property and Equipment (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 9,057	$ 16,711
Less: accumulated depreciation	(1,427)	(3,255)
Property and equipment, net	7,630	13,456
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,582	6,218
Buildings, riverboats, and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	4,113	7,506
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,321	2,685
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 41	$ 302