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Goodwill and Other Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2011
SPX Heat Transfer Inc.
Jul. 02, 2011
SPX Heat Transfer Inc.
Dec. 31, 2011
SPX Heat Transfer Inc.
Dec. 31, 2012
Flow Technology reportable segment
Dec. 31, 2011
Flow Technology reportable segment
Dec. 31, 2012
Thermal Equipment and Services reportable segment
Dec. 31, 2011
Thermal Equipment and Services reportable segment
Dec. 31, 2012
Industrial Products and Services
Dec. 31, 2011
Industrial Products and Services
Changes in the carrying amount of goodwill                        
Gross goodwill, beginning of the period   $ 2,057.1 $ 1,745.7       $ 1,019.9 $ 702.7 $ 586.6 $ 591.5 $ 450.6 $ 451.5
Accumulated impairment, balance at the beginning of the period   (285.0) (264.3)           (125.3) (104.5) (159.7) (159.8)
Goodwill, balance at the beginning of the period   1,772.1 1,481.4       1,019.9 702.7 461.3 487.0 290.9 291.7
Goodwill resulting from business combinations   14.6 324.8       14.6 324.8        
Impairments (270.4) (270.4) (20.8) (3.6) (17.2) (20.8)     (270.4) (20.8)    
Gross goodwill related to foreign currency translation and other   59.6 (13.4)       80.1 (7.6) (22.9) (4.9) 2.4 (0.9)
Accumulated impairments related to foreign currency translation and other   (1.9) 0.1               (1.9) 0.1
Goodwill related to foreign currency translation and other   57.7 (13.3)       80.1 (7.6) (22.9) (4.9) 0.5 (0.8)
Gross goodwill, end of the period 2,131.3 2,131.3 2,057.1       1,114.6 1,019.9 563.7 586.6 453.0 450.6
Accumulated impairment, balance at the end of the period (557.3) (557.3) (285.0)           (395.7) (125.3) (161.6) (159.7)
Goodwill, balance at the end of the period 1,574.0 1,574.0 1,772.1       1,114.6 1,019.9 168.0 461.3 291.4 290.9
Adjustments resulting from revisions to estimates of fair value of certain assets and liabilities and acquisitions   73.6 3.8                  
Foreign currency translation adjustments   8.4 9.5                  
Allocation of goodwill relating to deconsolidation of dry cooling products   $ 24.3