v3.5.0.2
Financial Instruments - Narrative (Details)
T in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
T
$ / T
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
T
$ / T
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Derivative [Line Items]          
Derivative instruments, gain (loss) recognized in income, ineffective portion and amount excluded from effectiveness testing, net $ 1.5 $ 1.9 $ 4.9 $ 5.7  
Long-term debt 7,745.3   7,745.3   $ 7,532.9
Contingent consideration - other long-term liabilities 66.3   $ 66.3   78.0
Discount rate     4.00%    
Landfill          
Derivative [Line Items]          
Expected useful life     30 years    
Sonoma County Landfill          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities 69.1   $ 69.1    
Carrying Amount          
Derivative [Line Items]          
Long-term debt 7,700.0   7,700.0   7,500.0
Contingent consideration - other long-term liabilities 69.1   69.1   69.6
Estimate of Fair Value Measurement          
Derivative [Line Items]          
Long-term debt 8,600.0   8,600.0   8,200.0
Fuel Hedges          
Derivative [Line Items]          
Derivative instruments, gain (loss) recognized in other comprehensive income (loss), effective portion, net 4.0 (5.3) 14.7 0.5  
Fuel hedges - other accrued liabilities 12.8   12.8   37.8
Fuel Hedges | Carrying Amount          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities 12.8   12.8   37.8
Fuel Hedges | Other Income (Expense)          
Derivative [Line Items]          
Derivative instruments, gain (loss) recognized in income, ineffective portion and amount excluded from effectiveness testing, net $ 0.1 $ (0.2) $ 0.6 $ (0.3)  
Recycling Commodity Hedges          
Derivative [Line Items]          
Costless collar hedge volume (in tons) | T 240   240    
Weighted average floor strike price (in dollars per ton) | $ / T 81.50   81.50    
Weighted average cap strike price (in dollars per ton) | $ / T 120.00   120.00    
Losses recognized in other comprehensive income $ 0.4   $ 0.4    
Commodity Contract | Carrying Amount          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities 0.7   0.7    
Minimum          
Derivative [Line Items]          
Undiscounted future contingent payments     89.0    
Maximum          
Derivative [Line Items]          
Undiscounted future contingent payments     178.0    
Fair Value, Measurements, Recurring          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities 69.1   69.1   69.6
Fair Value, Measurements, Recurring | Fuel Hedges          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities 12.8   12.8   37.8
Fair Value, Measurements, Recurring | Commodity Contract          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities 0.7   0.7    
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities 0.0   0.0   0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Fuel Hedges          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities 12.8   12.8   $ 37.8
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commodity Contract          
Derivative [Line Items]          
Fuel hedges - other accrued liabilities $ 0.7   $ 0.7