Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 940	$ 940
Accumulated Amortization	(639)	(590)
Net Carrying Amount	301	350
Non-amortizing intangible assets	148	148
Intangible assets other than goodwill	449	498
Gaming rights
Intangible Assets Excluding Goodwill [Line Items]
Non-amortizing intangible assets	22	22
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Non-amortizing intangible assets	$ 126	126
Customer relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	4 years 8 months
Gross Carrying Amount	$ 894	894
Accumulated Amortization	(615)	(568)
Net Carrying Amount	$ 279	326
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	8 years 3 months
Gross Carrying Amount	$ 3	3
Accumulated Amortization	(1)	(1)
Net Carrying Amount	$ 2	2
Gaming rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	7 years 9 months
Gross Carrying Amount	$ 43	43
Accumulated Amortization	(23)	(21)
Net Carrying Amount	$ 20	$ 22