Goodwill and Other Intangible Assets - Carrying Value and Accumulated Amortization for Each Major Class of Intangible Assets Other Than Goodwill (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,584.9	$ 1,546.8
Accumulated Amortization	(915.9)	(816.8)
Net Carrying Amount	669.0	730.0
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	2,554.4	2,757.7
Intangible assets other than goodwill	3,223.4	3,487.7
Gaming rights [Member]
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	974.1	1,159.5
Trademarks [Member]
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	1,580.3	1,598.2
Customer relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	6 years 7 months
Gross Carrying Amount	1,265.1	1,268.1
Accumulated Amortization	(712.9)	(645.5)
Net Carrying Amount	552.2	622.6
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	3 years 2 months
Gross Carrying Amount	85.2	97.6
Accumulated Amortization	(80.9)	(79.4)
Net Carrying Amount	4.3	18.2
Developed technology rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	2 years 8 months
Gross Carrying Amount	188.0	138.3
Accumulated Amortization	(100.9)	(76.5)
Net Carrying Amount	87.1	61.8
Gaming rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	9 years 8 months
Gross Carrying Amount	42.8	42.8
Accumulated Amortization	(17.4)	(15.4)
Net Carrying Amount	25.4	27.4
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	0 years
Gross Carrying Amount	3.8	0
Accumulated Amortization	(3.8)	0
Net Carrying Amount	$ 0	$ 0