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Receivables, Net - Rollforward of Allowance for Doubtful Accounts (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance For Doubtful Accounts Receivable [Line Items]      
Allowance for doubtful accounts - January 1 $ 12.9 $ 12.6 $ 20.2
Charges (benefits) to income 1.6 2.8 (3.0)
Write-offs (1.6) (2.2) (3.0)
Foreign currency and other   (0.3) (1.6)
Allowance for doubtful accounts - December 31 $ 12.9 $ 12.9 $ 12.6