Goodwill and Other Intangible Assets - Changes in Goodwill and Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Goodwill and Other Intangible Assets [Roll Forward]
Amortizing Intangible Assets, Beginning Balance	$ 1,027.6
Amortizing Intangible Assets, Impairments	0
Amortizing Intangible Assets, Amortization expense	(41.4)	(43.2)
Amortizing Intangible Assets, Foreign currency translation	(0.4)
Amortizing Intangible Assets, Other	0
Amortizing Intangible Assets, Ending Balance	985.8
Goodwill, Beginning Balance	3,160.3
Goodwill, Impairments	0
Goodwill, Other	5.5
Goodwill, Ending Balance	3,165.8
Other Non-Amortizing Intangible Assets, Beginning Balance	2,958.1
Other Non-Amortizing Intangible Assets, Impairments	(20.0)
Other Non-Amortizing Intangible Assets, Foreign currency translation	(1.6)
Other Non-Amortizing Intangible Assets, Other	(0.4)
Other Non-Amortizing Intangible Assets, Ending Balance	2,936.1
Goodwill and Other Intangible Assets Narrative [Abstract]
Other Non-Amortizing Intangible Assets, Impairments	20.0
Gaming Rights [Member]
Goodwill and Other Intangible Assets [Roll Forward]
Amortizing Intangible Assets, Beginning Balance	30.0
Amortizing Intangible Assets, Ending Balance	29.3
Other Non-Amortizing Intangible Assets, Beginning Balance	1,258.4
Other Non-Amortizing Intangible Assets, Impairments	(20.0)
Other Non-Amortizing Intangible Assets, Ending Balance	1,237.1
Goodwill and Other Intangible Assets Narrative [Abstract]
Other Non-Amortizing Intangible Assets, Impairments	$ 20.0