Fair Value of Derivatives Not Designated and Designated as Hedges (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives Fair Value [Line Items]
Derivatives assets	$ 0.4	$ 0.6
Not Designated as Hedging Instrument | Accrued Liabilities
Derivatives Fair Value [Line Items]
Derivatives liabilities	1.5	24.0
Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives Fair Value [Line Items]
Derivatives assets	1.3
Designated as Hedging Instrument | Other Noncurrent Assets
Derivatives Fair Value [Line Items]
Derivatives assets		14.7
Designated as Hedging Instrument | Other Non-current Liabilities
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 9.1