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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Accrued to expense $ 11.6us-gaap_ProductWarrantyAccrualWarrantiesIssued $ 2.0us-gaap_ProductWarrantyAccrualWarrantiesIssued $ 4.1us-gaap_ProductWarrantyAccrualWarrantiesIssued $ 3.6us-gaap_ProductWarrantyAccrualWarrantiesIssued $ 2.7us-gaap_ProductWarrantyAccrualWarrantiesIssued $ 4.5us-gaap_ProductWarrantyAccrualWarrantiesIssued
Discontinued operation, Revenue       0us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue 16.0us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue 25.0us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Product Warranty Accrual, Period Increase (Decrease)       (11.3)us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease (17.7)us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease 1.8us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax       (3.0)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax (0.4)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax (1.1)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Segment, Discontinued Operations            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Product Warranty Accrual, Period Increase (Decrease)         3.6us-gaap_ProductWarrantyAccrualPeriodIncreaseDecrease
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember
 
Damages from Product Defects            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Accrued to expense       $ (3.0)us-gaap_ProductWarrantyAccrualWarrantiesIssued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_DamagesFromProductDefectsMember
$ 2.0us-gaap_ProductWarrantyAccrualWarrantiesIssued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_DamagesFromProductDefectsMember
$ 3.6us-gaap_ProductWarrantyAccrualWarrantiesIssued
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_DamagesFromProductDefectsMember