Goodwill and Other Intangible Assets - Changes in Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Finite-lived	[1]	$ 0	$ 0
Amortizing Intangible Assets, Amortization Expense		(68)	(67)
Finite-Lived Intangible Assets, Other Charges	[2]	0	0
Finite-lived Intangible Assets Acquired	[3]	0	0
Amortizing Intangible Assets, Other		0	0
Amortizing Intangible Assets, Ending Balance		342	355
Other Non-Amortizing Intangible Assets, Beginning Balance		1,254	148
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	[1]	(21)	0
Indefinite-lived Intangible Assets, Other Charges	[2]	0	(22)
Indefinite-lived Intangible Assets Acquired	[3]	20	0
Indefinite-lived Intangible Assets, Period Increase (Decrease)		(8)	4
Other Non-Amortizing Intangible Assets, Ending Balance		2,635	1,254
Intangible assets other than goodwill, Beginning Balance		1,609	433
Impairment of Intangible Assets (Excluding Goodwill)	[1]	(21)	0
Amortizing Intangible Assets, Amortization Expense		68	67
Intangible Assets Acquired	[3]	20	0
Increase (Decrease) in Intangible Assets, Current		(8)	4
Intangible assets other than goodwill, Ending Balance		2,977	1,609
Amortizing Intangible Assets, Beginning Balance		355	285
Centaur Holdings, LLC [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	[4]	55	0
Indefinite-lived Intangible Assets Acquired	[4]	1,390	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	[4]	1,445	0
OpCo [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	[4]	0	137
Indefinite-lived Intangible Assets Acquired	[4]	0	1,124
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	[4]	0	$ 1,261
Other U.S. [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	[1]	12
Corporate and Other [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	[1]	$ 9

[1] (1) $12 million recognized in our Other U.S. segment and $9 million recognized in our All Other segment.

[2] (2) See Note 2 or further details relating to the deconsolidation of Horseshoe Baltimore.

[3] (4) Other additions of $20 million are related to gaming rights.

[4] (3) See Note 4 for further details relating to the acquisitions of OpCo and Centaur.