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Goodwill (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Goodwill [Roll Forward]    
December 31, 2011 (gross) $ 8,944.0  
Acquisitions and adjustments 0.3  
Currency translation 8.2  
September 30, 2012 (gross) 8,952.5  
Accumulated Impairment (2,840.0) [1]  
Goodwill (net) 6,112.5 6,104.0
Climate Solutions [Member]
   
Goodwill [Roll Forward]    
December 31, 2011 (gross) 5,342.8  
Acquisitions and adjustments 0.3  
Currency translation 4.8  
September 30, 2012 (gross) 5,347.9  
Accumulated Impairment (839.8) [1]  
Goodwill (net) 4,508.1  
Residential Solutions [Member]
   
Goodwill [Roll Forward]    
December 31, 2011 (gross) 2,328.0  
Acquisitions and adjustments 0  
Currency translation 0  
September 30, 2012 (gross) 2,328.0  
Accumulated Impairment (1,656.2) [1]  
Goodwill (net) 671.8  
Industrial Technologies [Member]
   
Goodwill [Roll Forward]    
December 31, 2011 (gross) 366.8  
Acquisitions and adjustments 0  
Currency translation 0.6  
September 30, 2012 (gross) 367.4  
Accumulated Impairment 0 [1]  
Goodwill (net) 367.4  
Security Technologies [Member]
   
Goodwill [Roll Forward]    
December 31, 2011 (gross) 906.4  
Acquisitions and adjustments 0  
Currency translation 2.8  
September 30, 2012 (gross) 909.2  
Accumulated Impairment (344.0) [1]  
Goodwill (net) $ 565.2  
[1] No impairment charges were recorded by the Company in 2012.