Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,058	$ 1,058
Accumulated Amortization	(685)	(663)
Net Carrying Amount	373	395
Non-amortizing intangible assets	148	148
Intangible assets other than goodwill	521	543
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)	5 years 1 month
Gross Carrying Amount	$ 917	917
Accumulated Amortization	(606)	(589)
Net Carrying Amount	$ 311	328
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	8 years 9 months
Gross Carrying Amount	$ 3	3
Accumulated Amortization	(1)	(1)
Net Carrying Amount	$ 2	2
Developed technology rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	2 years
Gross Carrying Amount	$ 86	86
Accumulated Amortization	(53)	(49)
Net Carrying Amount	$ 33	37
Gaming rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	8 years 1 month
Gross Carrying Amount	$ 52	52
Accumulated Amortization	(25)	(24)
Net Carrying Amount	$ 27	$ 28