XML 54 R42.htm IDEA: XBRL DOCUMENT v3.4.0.3
Commitments and Contingencies - Additional information (Detail)
 3 Months Ended
Mar. 31, 2016
USD ($)
site
Landfill
Homeowners
Dec. 31, 2015
USD ($)
Commitments And Contingencies [Line Items]    
Term of guarantees of financial obligations Guarantees of unconsolidated entities' financial obligations maturing through 2020  
Maximum future payments regarding guarantees of unconsolidated entities financial obligations $ 7,000,000  
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value | Landfill 21  
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value | Homeowners 850  
Environmental remediation reasonably possible additional losses high estimate $ 190,000,000  
Environmental remediation liabilities $ 207,000,000  
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  
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 3 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 24 months  
Wheelabrator [Member]    
Commitments And Contingencies [Line Items]    
Maximum future payments regarding guarantees of unconsolidated entities financial obligations   $ 106,000,000
Financial and performance obligations, net liability $ 13,000,000 $ 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