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Summary of Carrying Amount and Fair Value of Financial Instruments (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Short-term Debt
    
Carrying Amounts and Fair Values of Financial Instruments [Line Items]    
Notional Amount $ 0.3 $ 9.0
Fair Value 0.3 9.0
Long-term Debt
    
Carrying Amounts and Fair Values of Financial Instruments [Line Items]    
Notional Amount 157.5 [1] 214.1 [1]
Fair Value $ 208.2 [1] $ 212.4 [1]
[1] Long-term debt includes current portions of long-term debt and current portions of capital lease obligations of $4.7 million and $0.1 million as of December 31, 2012 and 2011, respectively, and $0.9 million of financial service borrowings at December 31, 2011, which is included in discontinued operations.