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Acquisitions, Investments, Dispositions and Divestitures - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Line Items
Tangible and intangible asset impairments	$ 1	$ 994	$ 2,831
Discontinued Operations [Member]
Line Items
Tangible and intangible asset impairments	0	95	199
Discontinued Operations [Member] \| Showboat Atlantic City [Member] \| Discontinued Operations, Held-for-sale [Member]
Line Items
Discontinued Operation, Other Liabilities		18
Discontinued Operation, Accrued Liabilities, Current		26
Tangible and intangible asset impairments	0	10	69
Discontinued Operation, Other Assets		18
Discontinued Operations [Member] \| Harrahs Tunica [Member] \| Discontinued Operations, Disposed of by Means Other than Sale, Abandonment [Member]
Line Items
Discontinued Operation, Accrued Liabilities, Current		16
Tangible and intangible asset impairments	$ 0	68	$ 118
Caesars Interactive Entertainment [Member] \| Pacific Interactive [Member]
Line Items
Contingent earnout liability				$ 29
Contingency, Amount of Settlement		$ 66