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Amounts Recognized In Consolidated Balance Sheets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Retirement Plans [Line Items]    
Other assets $ 9.8 $ 1.0
Accrued compensation and benefits (4.6) (3.9)
Other long-term liabilities (65.6) (126.4)
Net amount recognized $ (60.4) $ (129.3)