v3.10.0.1
Financial Instruments - Narrative (Details)
T in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
T
$ / T
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
T
$ / T
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Derivative [Line Items]          
Long-term debt $ 8,257,700,000   $ 8,257,700,000   $ 8,187,400,000
Contingent consideration - other long-term liabilities 70,700,000   70,700,000   71,300,000
Waste Management Contract, Sonoma County          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities $ 67,600,000   $ 67,600,000    
Waste Management Contract, Sonoma County | Measurement Input, Discount Rate          
Derivative [Line Items]          
Discount rate 0.040   0.040    
Waste Management Contract, Sonoma County | Minimum          
Derivative [Line Items]          
Undiscounted future contingent payments $ 82,000,000   $ 82,000,000    
Waste Management Contract, Sonoma County | Maximum          
Derivative [Line Items]          
Undiscounted future contingent payments 171,000,000   $ 171,000,000    
Waste Management Contract, Sonoma County | Landfill          
Derivative [Line Items]          
Expected useful life     30 years    
Landfill Acquisitions          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities $ 5,100,000   $ 5,100,000    
Landfill Acquisitions | Measurement Input, Discount Rate          
Derivative [Line Items]          
Discount rate 0.043   0.043    
Carrying Amount          
Derivative [Line Items]          
Long-term debt $ 8,300,000,000   $ 8,300,000,000   8,200,000,000
Contingent consideration - other long-term liabilities 72,700,000   72,700,000   73,300,000
Estimate of Fair Value Measurement          
Derivative [Line Items]          
Long-term debt 8,600,000,000   8,600,000,000   8,800,000,000
Fuel Hedges          
Derivative [Line Items]          
Derivative instruments, gain (loss) recognized in other comprehensive income, effective portion, net 100,000   100,000    
Fuel Hedges | Carrying Amount          
Derivative [Line Items]          
Derivatives - other current assets $ 2,600,000   $ 2,600,000   3,000,000
Recycling Commodity Hedges          
Derivative [Line Items]          
Costless collar hedge volume (in tons) | T 60   60    
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    
Gain (loss) recognized in other comprehensive income $ 300,000 $ (600,000) $ 700,000 $ (1,200,000)  
Commodity Contract | Carrying Amount          
Derivative [Line Items]          
Derivatives - other current assets 800,000   800,000    
Derivatives - other accrued liabilities         200,000
Fair Value, Measurements, Recurring          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities 72,700,000   72,700,000   73,300,000
Fair Value, Measurements, Recurring | Fuel Hedges          
Derivative [Line Items]          
Derivatives - other current assets 2,600,000   2,600,000   3,000,000
Fair Value, Measurements, Recurring | Commodity Contract          
Derivative [Line Items]          
Derivatives - other current assets 800,000   800,000    
Derivatives - other accrued liabilities         200,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2          
Derivative [Line Items]          
Contingent consideration - other long-term liabilities 0   0   0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Fuel Hedges          
Derivative [Line Items]          
Derivatives - other current assets 2,600,000   2,600,000   3,000,000
Amounts recognized in other income, net for ineffectiveness 0 0 0 0  
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Commodity Contract          
Derivative [Line Items]          
Derivatives - other current assets 800,000   800,000    
Derivatives - other accrued liabilities         $ 200,000
Amounts recognized in other income, net for ineffectiveness $ 0 $ 0 $ 0 $ 0