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Product Warranties (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Product Liability Contingency [Line Items]    
Product warranty accrual, beginning of period $ 13.4 $ 2.3
Product warranty accrual, warranties issued 3.6 3.0
Product warranty accrual, payments (0.2) (0.2)
Product warranty accrual, preexisting, increase (decrease) (0.1) 0.1
Product warranty accrual, currency translation, increase (decrease) 0.1 0.1
Product warranty accrual, end of period $ 16.8 $ 5.3