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Allowance for Losses (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Changes in the allowance for possible losses    
Beginning balance $ 11.6 $ 13.4
Provision (reversal) for losses 0.2 (1.1)
Charges to allowance (0.5) (1.1)
Recoveries and other, including foreign exchange adjustments 0.5 0.4
Ending Balance $ 11.8 $ 11.6