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Receivables and Allowances (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Receivables and Allowances [Abstract]    
Trade accounts receivable $ 407.7 $ 351.7
Non-trade receivables 12.4 14.5
Accounts receivable, gross 420.1 366.2
Allowance for credit memos, returns, and cash discounts (22.8) (20.8)
Allowance for doubtful accounts (3.0) (3.6)
Total allowances (25.8) (24.4)
Receivables Net Current $ 394.3 $ 341.8