Goodwill and Other Intangible Assets - Intangible Amortization Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite Lived Intangible Assets Amortization [Line Items]
Intangible amortization	$ 107.2	$ 95.9	$ 97.1
Cost of Products Sold [Member]
Finite Lived Intangible Assets Amortization [Line Items]
Intangible amortization	15.2	18.3	24.0
Selling, General and Administrative [Member]
Finite Lived Intangible Assets Amortization [Line Items]
Intangible amortization	$ 92.0	$ 77.6	$ 73.1