Commitments and Contingencies - Additional information (Detail)	6 Months Ended
	Jun. 30, 2017 USD ($) site Homeowners Landfill	Dec. 31, 2016 USD ($)
Commitments And Contingencies [Line Items]
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
Environmental remediation reasonably possible additional losses high estimate	$ 115,000,000
Environmental remediation liabilities	$ 245,000,000
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP | site	76
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	61
Approximate percentage of workforce covered by collective bargaining agreements	20.00%
2014 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits	9 months
2015 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits	12 months
2016 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits	18 months
2017 Audit [Member]
Commitments And Contingencies [Line Items]
Expected time of completion of IRS audits	30 months
Wheelabrator [Member]
Commitments And Contingencies [Line Items]
Maximum future payments regarding guarantees of unconsolidated entities financial obligations	$ 96,000,000	$ 96,000,000
Operational and financial performance obligations, net liability	9,000,000	11,000,000
San Jacinto Waste Pits [Member]
Commitments And Contingencies [Line Items]
Cost estimate associated with environmental remediation liability	45,000,000	$ 46,000,000
Domestic Line of Credit [Member]
Commitments And Contingencies [Line Items]
Credit Facility, aggregate capacity	2,250,000,000
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