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Goodwill (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Goodwill [Roll Forward]    
December 31, 2012 (gross) $ 8,978.9  
Acquisitions and adjustments 0 [1]  
Currency translation (40.6)  
March 31, 2013 (gross) 8,938.3  
Accumulated Impairment (2,840.0) [2]  
Goodwill (net) 6,098.3 6,138.9
Climate Solutions [Member]
   
Goodwill [Roll Forward]    
December 31, 2012 (gross) 5,370.6  
Acquisitions and adjustments (1.4) [1]  
Currency translation (32.4)  
March 31, 2013 (gross) 5,336.8  
Accumulated Impairment (839.8) [2]  
Goodwill (net) 4,497.0  
Residential Solutions [Member]
   
Goodwill [Roll Forward]    
December 31, 2012 (gross) 2,317.1  
Acquisitions and adjustments 14.9 [1]  
Currency translation 0  
March 31, 2013 (gross) 2,332.0  
Accumulated Impairment (1,656.2) [2]  
Goodwill (net) 675.8  
Industrial Technologies [Member]
   
Goodwill [Roll Forward]    
December 31, 2012 (gross) 368.7  
Acquisitions and adjustments 1.1 [1]  
Currency translation (2.4)  
March 31, 2013 (gross) 367.4  
Accumulated Impairment 0 [2]  
Goodwill (net) 367.4  
Security Technologies [Member]
   
Goodwill [Roll Forward]    
December 31, 2012 (gross) 922.5  
Acquisitions and adjustments (14.6) [1]  
Currency translation (5.8)  
March 31, 2013 (gross) 902.1  
Accumulated Impairment (344.0) [2]  
Goodwill (net) $ 558.1  
[1] During 2013, the Company made reclassifications to goodwill across all segments, including a reclassification of goodwill related to a product line transfer from the Security Technologies segment to the Residential Solutions segment.
[2] No impairment charges were recorded by the Company in 2013 or 2012.