Company's Derivative Instruments and their Impact on Financial Condition of Company (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Total derivatives not designated as hedging instruments	$ (1.2)	$ (0.2)
Other Current Liabilities | Foreign currency contracts
Derivative [Line Items]
Derivative liability, Fair Value	(0.3)	(0.2)
Other Current Liabilities | Commodity contracts
Derivative [Line Items]
Derivative liability, Fair Value	(1.2)	(0.3)
Other Current Liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liability, Fair Value	(26.2)	(31.2)
Other Current Assets | Foreign currency contracts
Derivative [Line Items]
Derivative Assets, Fair Value	0
Other Current Assets | Commodity contracts
Derivative [Line Items]
Derivative Assets, Fair Value	0.1	0.1
Derivatives not designated as hedging instruments
Derivative [Line Items]
Total derivatives not designated as hedging instruments	(30.5)	(52.7)
Derivatives not designated as hedging instruments | Other Current Liabilities | Foreign currency contracts
Derivative [Line Items]
Derivative liability, Fair Value	(0.3)	(0.2)
Derivatives not designated as hedging instruments | Other Current Assets | Foreign currency contracts
Derivative [Line Items]
Derivative Assets, Fair Value	0
Derivatives not designated as hedging instruments | Other Current Assets | Commodity contracts
Derivative [Line Items]
Derivative Assets, Fair Value	0.2	0.2
Derivatives not designated as hedging instruments | Other current and non-current liabilities | Commodity contracts
Derivative [Line Items]
Derivative liability, Fair Value	(1.4)	(0.4)
Derivatives not designated as hedging instruments | Other current and non-current liabilities | Interest rate contracts
Derivative [Line Items]
Derivative liability, Fair Value	$ (29.0)	$ (52.3)