Property and Equipment, net - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Interest Costs Capitalized	$ 45	$ 38	$ 38
Recorded impairment of tangible assets	138	2,576	631
Harrah's Reno [Member]
Property, Plant and Equipment [Line Items]
Recorded impairment of tangible assets	49
Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Recorded impairment of tangible assets	60	2,381	181
Continuing Operations [Member] | MISSISSIPPI
Property, Plant and Equipment [Line Items]
Recorded impairment of tangible assets		105
Continuing Operations [Member] | Atlantic Destination [Member]
Property, Plant and Equipment [Line Items]
Recorded impairment of tangible assets		$ 499		$ 1,700