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Warranties (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Changes in accrued product warranty costs      
Beginning balance $ 6.5 $ 5.9 $ 5.1
Settlements made (in cash or in kind) (6.3) (5.6) (6.3)
Current year accrual 6.5 6.5 6.8
Adjustments to preexisting warranties     0.4
Effect of foreign currency translation (0.1) (0.3) (0.1)
Ending balance $ 6.6 $ 6.5 $ 5.9