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Commitments and Contingencies - Additional information (Detail)
 3 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Dec. 31, 2016
USD ($)
site
Landfill
Homeowners
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Mar. 31, 2016
USD ($)
Commitments And Contingencies [Line Items]          
Maximum self insurance exposures per incident under general liability insurance program   $ 2,500,000      
Maximum self insurance exposures per incident under workers' compensation insurance program   5,000,000      
Per incident base deductible under auto liability insurance program   5,000,000      
Per incident additional deductible under auto liability insurance   4,800,000      
Low end of layer subject to additional deductibles of auto liability insurance   5,000,000      
High end of layer subject to additional deductible of auto liability insurance   10,000,000      
Rental expense   125,000,000 $ 140,000,000 $ 159,000,000  
Minimum contractual payments for operating leases in 2017   109,000,000      
Minimum contractual payments for operating leases in 2018   90,000,000      
Minimum contractual payments for operating leases in 2019   73,000,000      
Minimum contractual payments for operating leases in 2020   62,000,000      
Minimum contractual payments for operating leases in 2021   44,000,000      
Minimum contractual payments for operating leases thereafter   306,000,000      
Estimated minimum purchase obligation in 2017   179,000,000      
Estimated minimum purchase obligation in 2018   149,000,000      
Estimated minimum purchase obligation in 2019   112,000,000      
Estimated minimum purchase obligation in 2020   92,000,000      
Estimated minimum purchase obligation in 2021   88,000,000      
Estimated minimum purchase obligation in thereafter   336,000,000      
Maximum future payments regarding guarantees of unconsolidated entities financial obligations   $ 6,000,000      
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value | Homeowners   850      
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | Landfill   22      
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP | site   75      
Number of owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site   15      
Number of non-owned sites listed on the EPA's NPL for which we have been notified we are a PRP | site   60      
Increase in cost estimate associated with environmental remediation liability   $ 44,000,000      
Approximate percentage of workforce covered by collective bargaining agreements   20.00%      
Withdrawal from Multiemployer Pension Plans [Member]          
Commitments And Contingencies [Line Items]          
Charge to "Operating" expenses $ 55,000,000 $ 0 51,000,000 $ 4,000,000  
WM's Senior Indebtedness [Member]          
Commitments And Contingencies [Line Items]          
Maturity date of senior indebtedness   2045      
WM Holdings Senior Indebtedness [Member]          
Commitments And Contingencies [Line Items]          
Maturity date of senior indebtedness   2026      
Disposal [Member]          
Commitments And Contingencies [Line Items]          
Purchase agreements expiring through the period   2052      
Waste Paper [Member]          
Commitments And Contingencies [Line Items]          
Purchase agreements expiring through the period   2019      
Wheelabrator [Member]          
Commitments And Contingencies [Line Items]          
Maximum future payments regarding guarantees of unconsolidated entities financial obligations   $ 96,000,000 106,000,000    
Operational and financial performance obligations, net liability   11,000,000 $ 13,000,000    
Maximum [Member]          
Commitments And Contingencies [Line Items]          
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K   100,000      
Domestic Line of Credit [Member]          
Commitments And Contingencies [Line Items]          
Credit Facility, aggregate capacity   $ 2,250,000,000     $ 2,250,000,000