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Warranties (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Changes in accrued product warranty costs    
Beginning balance $ 6.5 $ 5.9
Settlements made (in cash or in kind) (4.6) (4.1)
Current year accrual 5.0 4.9
Effect of foreign currency translation 0 (0.1)
Ending balance $ 6.9 $ 6.6