v2.4.0.6
Business Acquisitions, Disposition of Assets, Asset Impairments and Restructuring Charges (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Business Acquisitions Disposition of Assets Asset Impairments and Restructuring Charges (Textual) [Abstract]                      
Proceeds from dispositions of assets impairment                 $ 14.2 $ 4.0 $ 153.5
Gain (loss) on disposition of businesses                 21.0   (10.2)
Impairment loss related to long lived assets                 20.4 15.1 7.1
Restructuring and integration charges         1.8 2.6 1.4 5.6   11.4 63.2
Aggregate amount of cash used for business acquisitions 42.6       58.9       42.6 58.9  
Loss (gain) on disposition of assets and impairments, net 3.3 5.8 19.4 (0.4) (8.0) 25.5 1.1 0.5 28.1 19.1 (137.0)
Business Acquisition [Line Items]                      
(loss) on disposition of assets, net                 (43.0) (11.2) (147.1)
Severance and other termination benefits [Member]
                     
Business Acquisition [Line Items]                      
Severance and other termination benefit 0.3               0.3    
Southern Region [Member]
                     
Business Acquisition [Line Items]                      
Asset impairment charges                 28.7    
Miami-Dade County [Member]
                     
Business Acquisition [Line Items]                      
(loss) on disposition of assets, net                     $ (10.2)