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SPECIAL CHARGES, NET (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Special charges, net    
Special charges, net $ 6.6spw_SpecialCharges $ 10.0spw_SpecialCharges
Expected charges to be incurred 3.0us-gaap_RestructuringAndRelatedCostExpectedCost1  
Restructuring liabilities    
Balance at beginning of period 14.3spw_RestructuringAndIntegrationReserves 19.0spw_RestructuringAndIntegrationReserves
Special charges 6.2spw_RestructuringAndIntegrationReservesPeriodExpense 10.0spw_RestructuringAndIntegrationReservesPeriodExpense
Utilization - cash (3.9)spw_RestructuringAndIntegrationReserveSettledWithCash (9.7)spw_RestructuringAndIntegrationReserveSettledWithCash
Currency translation adjustment and other (0.7)spw_RestructuringAndIntegrationReservesTranslationAndOtherAdjustment 0.4spw_RestructuringAndIntegrationReservesTranslationAndOtherAdjustment
Balance at end of period 15.9spw_RestructuringAndIntegrationReserves 19.7spw_RestructuringAndIntegrationReserves
Non-cash special charges 0.4spw_SpecialChargesNonCash  
Discontinued operations    
Restructuring liabilities    
Utilization - cash   (0.4)spw_RestructuringAndIntegrationReserveSettledWithCash
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember
General corporate    
Special charges, net    
Special charges, net   0.6spw_SpecialCharges
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Flow Technology Reportable Segment    
Special charges, net    
Special charges, net 3.8spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_FlowTechnologyMember
8.9spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_FlowTechnologyMember
Thermal Equipment and Services reportable segment    
Special charges, net    
Special charges, net 2.3spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_ThermalEquipmentAndServicesMember
0.1spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_ThermalEquipmentAndServicesMember
Industrial Products and Services and Other    
Special charges, net    
Special charges, net $ 0.5spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_IndustrialProductsServicesAndOtherMember
$ 0.4spw_SpecialCharges
/ us-gaap_StatementBusinessSegmentsAxis
= spw_IndustrialProductsServicesAndOtherMember