Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,058	$ 1,058
Accumulated Amortization	(706)	(663)
Net Carrying Amount	352	395
Non-amortizing intangible assets	148	148
Intangible assets other than goodwill	500	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)	4 years 11 months
Gross Carrying Amount	$ 917	917
Accumulated Amortization	(622)	(589)
Net Carrying Amount	$ 295	328
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	8 years 6 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)	1 year 8 months
Gross Carrying Amount	$ 86	86
Accumulated Amortization	(57)	(49)
Net Carrying Amount	$ 29	37
Gaming rights
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	7 years 9 months
Gross Carrying Amount	$ 52	52
Accumulated Amortization	(26)	(24)
Net Carrying Amount	$ 26	$ 28