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	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,585.8	$ 1,546.8
Accumulated Amortization	(882.8)	(816.8)
Net Carrying Amount	703.0	730.0
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	2,711.5	2,757.7
Intangible assets other than goodwill	3,414.5	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	1,131.0	1,159.5
Trademarks [Member]
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	1,580.5	1,598.2
Customer relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	5 years 6 months
Gross Carrying Amount	1,265.2	1,268.1
Accumulated Amortization	(690.1)	(645.5)
Net Carrying Amount	575.1	622.6
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	3 years 5 months
Gross Carrying Amount	86.1	97.6
Accumulated Amortization	(81.2)	(79.4)
Net Carrying Amount	4.9	18.2
Developed Technology Rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	2 years 11 months
Gross Carrying Amount	187.9	138.3
Accumulated Amortization	(92.3)	(76.5)
Net Carrying Amount	95.6	61.8
Gaming rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	10 years
Gross Carrying Amount	42.8	42.8
Accumulated Amortization	(16.7)	(15.4)
Net Carrying Amount	26.1	27.4
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	0 years 6 months
Gross Carrying Amount	3.8	0
Accumulated Amortization	(2.5)	0
Net Carrying Amount	$ 1.3	$ 0