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Allowance for Losses (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Changes in the allowance for possible losses    
Beginning balance $ 6.4 $ 6.4
(Reversal) provision for losses 0.5 (0.3)
Charges to allowance (0.6) (0.1)
Recoveries and other, including foreign exchange adjustments (0.1) 0.4
Ending balance $ 6.2 $ 6.4