Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Goodwill and Other Intangible Assets [Line Items]
Goodwill impairment loss	$ 104.3	$ 195.2	$ 3.0
Contribution of Thistledown to joint venture, Goodwill transfers	0	(20.1)
Amortizing Intangible Assets, Additions or adjustments	19.1	37.8
Impairment of non-amortizing intangible assets other than goodwill	199.6	242.0
Amortization of intangible assets	164.5	174.6	156.7
Finite-Lived Intangible Assets, Amortization Expense, 2014	136.4
Finite-Lived Intangible Assets, Amortization Expense, 2015	134.9
Finite-Lived Intangible Assets, Amortization Expense, 2016	121.4
Finite-Lived Intangible Assets, Amortization Expense, 2017	110.9
Finite-Lived Intangible Assets, Amortization Expense, 2018	90.4
Goodwill and Intangible Asset Impairment	303.9	437.2	11.0
Other Intangible Assets [Member]
Schedule of Goodwill and Other Intangible Assets [Line Items]
Goodwill and Intangible Asset Impairment	150.3
Sterling Suffolk Racecourse, LLC [Member]
Schedule of Goodwill and Other Intangible Assets [Line Items]
Goodwill and Intangible Asset Impairment	$ 60.0