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, 2013	Dec. 31, 2012
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,804.6	$ 1,803.0
Accumulated Amortization	(856.0)	(775.4)
Net Carrying Amount	948.6	1,027.6
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	2,933.1	2,958.1
Total intangible assets other than goodwill	3,881.7	3,985.7
Gaming rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	11 years 0 months 0 days
Gross Carrying Amount	42.8	42.8
Accumulated Amortization	(14.1)	(12.8)
Net Carrying Amount	28.7	30.0
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	1,234.1	1,258.4
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	0 years
Gross Carrying Amount	0	1.7
Accumulated Amortization	0	(1.7)
Net Carrying Amount	0	0
Carrying value and accumulated amortization for each major class of intangible assets other than goodwill
Non-amortizing intangible assets	1,699.0	1,699.7
Customer relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	6 years 6 months 12 days
Gross Carrying Amount	1,456.9	1,456.7
Accumulated Amortization	(681.5)	(618.0)
Net Carrying Amount	775.4	838.7
Contract rights [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	1 year 6 months 0 days
Gross Carrying Amount	144.1	145.1
Accumulated Amortization	(72.3)	(66.3)
Net Carrying Amount	71.8	78.8
Patented technology [Member]
Intangible Assets Excluding Goodwill [Line Items]
Weighted Average Remaining Useful Life (in years)	3 years 3 months 15 days
Gross Carrying Amount	160.8	156.7
Accumulated Amortization	(88.1)	(76.6)
Net Carrying Amount	$ 72.7	$ 80.1