Goodwill and Other Intangible Assets - Impairment Charges for Goodwill and Other Non-Amortizing Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Schedule of Impairment Charges for Goodwill and Other Non-Amortizing Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 3,621	$ 710	[1]
Impairment of intangible assets other than goodwill	0	240
Continuing Operations [Member]
Schedule of Impairment Charges for Goodwill and Other Non-Amortizing Intangible Assets [Line Items]
Goodwill, Impairment Loss	0	695		$ 104
Total impairment charges	0	934		450
Continuing Operations [Member] | Trademarks [Member]
Schedule of Impairment Charges for Goodwill and Other Non-Amortizing Intangible Assets [Line Items]
Impairment of intangible assets other than goodwill	0	13		101
Continuing Operations [Member] | Gaming Rights and other [Member]
Schedule of Impairment Charges for Goodwill and Other Non-Amortizing Intangible Assets [Line Items]
Impairment of intangible assets other than goodwill	$ 0	$ 226		$ 245

[1] CIE impairment during 2014 related to CIE RMG BEL, LLC is included in discontinued operations. (See Note 7)