v3.5.0.2
Goodwill and Other Intangible Assets, Net - Other Intangible Assets, Net (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Gross Intangible Assets    
Beginning balance $ 748.0  
Acquisitions 5.3  
Ending balance 753.3  
Accumulated Amortization    
Beginning balance (501.6)  
Additions Charged to Expense (50.3)  
Ending balance (551.9)  
Other Intangible Assets, Net 201.4 $ 246.4
Customer relationships, franchise and other municipal agreements    
Gross Intangible Assets    
Beginning balance 651.6  
Acquisitions 4.4  
Ending balance 656.0  
Accumulated Amortization    
Beginning balance (431.0)  
Additions Charged to Expense (46.8)  
Ending balance (477.8)  
Other Intangible Assets, Net 178.2  
Non-compete agreements    
Gross Intangible Assets    
Beginning balance 30.8  
Acquisitions 0.9  
Ending balance 31.7  
Accumulated Amortization    
Beginning balance (22.1)  
Additions Charged to Expense (2.4)  
Ending balance (24.5)  
Other Intangible Assets, Net 7.2  
Other intangible assets    
Gross Intangible Assets    
Beginning balance 65.6  
Acquisitions 0.0  
Ending balance 65.6  
Accumulated Amortization    
Beginning balance (48.5)  
Additions Charged to Expense (1.1)  
Ending balance (49.6)  
Other Intangible Assets, Net $ 16.0