Goodwill and Other Intangible Assets - Changes in Goodwill and Other Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Goodwill and Other Intangible Assets [Roll Forward]
Amortizing Intangible Assets, Beginning Balance	$ 730.0
Amortizing Intangible Assets, Additions	49.9
Amortizing Intangible Assets, Impairments	(1.9)
Amortizing Intangible Assets, Amortization expense	(101.1)
Amortizing Intangible Assets, Other	(7.9)
Amortizing Intangible Assets, Ending Balance	669.0
Goodwill	3,063.3
Goodwill, Acquired During Period	14.1
Goodwill, Impairment Loss	(304.2)
Goodwill, Other	(0.5)
Goodwill	2,772.7
Other Non-Amortizing Intangible Assets, Beginning Balance	2,757.7
Other Non-Amortizing Intangible Assets, Impairments	(199.2)
Other Non-Amortizing Intangible Assets, Other	(4.1)
Other Non-Amortizing Intangible Assets, Ending Balance	$ 2,554.4