Commitments and Contingencies - Additional information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014 Homeowners site Landfill
Commitments And Contingencies [Line Items]
Credit Facility, aggregate capacity	$ 2,250,000,000
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	9,000,000
Approximate number of homeowners' properties adjacent to or near certain of our landfills with agreements guaranteeing market value	825
Number of landfills adjacent to or near homeowners' properties with agreements guaranteeing market value	20
High end estimate of reasonably possible additional losses associated with environmental remediation liabilities	190,000,000
Environmental remediation liability	223,000,000
Number of sites listed on the EPA's NPL for which we have been notified we are a PRP	75
Number of owned sites listed on the EPA's NPL for which we have been notified we are a PRP	14
Number of non-owned sites listed on the EPA's NPL for which we have been notified we are a PRP	61
Dollar threshold for environmental matters requiring disclosure under item 103 of the SEC's Regulation S-K	100,000
Approximate percentage of workforce covered by collective bargaining agreements	20.00%
2013 Audit [Member]
Commitments And Contingencies [Line Items]
Number of months expected for IRS audit(s) to be completed	9 months
2014 Audit [Member]
Commitments And Contingencies [Line Items]
Number of months expected for IRS audit(s) to be completed	21 months
Central States Pension Plan [Member]
Commitments And Contingencies [Line Items]
Estimate of possible loss	40,000,000
U.S. Revolving Credit Facility [Member]
Commitments And Contingencies [Line Items]
Credit Facility, aggregate capacity	$ 2,250,000,000