Company's Derivative Instruments and their Impact on Financial Condition of Company (Detail) (Derivatives not designated as hedging instruments, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Total derivatives not designated as hedging instruments	$ (7.0)	$ (19.9)
Foreign currency contracts | Other current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value	(0.2)	(0.3)
Commodity contracts
Derivative [Line Items]
Total derivatives not designated as hedging instruments	0.1	(1.6)
Commodity contracts | Other current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value	(0.3)	(1.5)
Commodity contracts | Other current and non-current assets
Derivative [Line Items]
Derivative Assets, Fair Value	0.4	0.1
Commodity contracts | Other current and non-current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value		(1.7)
Commodity contracts | Other non-current assets
Derivative [Line Items]
Derivative Assets, Fair Value		0
Commodity contracts | Other non-current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value		(0.2)
Interest rate contracts | Other current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value		(18.5)
Interest rate contracts | Other current and non-current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value		(19.5)
Interest rate contracts | Other non-current assets
Derivative [Line Items]
Derivative Assets, Fair Value	0.4	1.5
Interest rate contracts | Other non-current liabilities
Derivative [Line Items]
Derivative Liability, Fair Value	$ (7.3)	$ (1.0)