Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives for Significant Property and Equipment Categories (Detail)	12 Months Ended
	Dec. 31, 2014
Minimum [Member] | Vehicles - Excluding Rail Haul Cars [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Minimum [Member] | Vehicles - Rail Haul Cars [Member]
Property, Plant and Equipment [Line Items]
Useful Life	10 years
Minimum [Member] | Machinery and Equipment - Including Containers [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Minimum [Member] | Buildings and Improvements - Excluding Waste - to - Energy Facilities [Member]
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Minimum [Member] | Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Maximum [Member] | Vehicles - Excluding Rail Haul Cars [Member]
Property, Plant and Equipment [Line Items]
Useful Life	10 years
Maximum [Member] | Vehicles - Rail Haul Cars [Member]
Property, Plant and Equipment [Line Items]
Useful Life	20 years
Maximum [Member] | Machinery and Equipment - Including Containers [Member]
Property, Plant and Equipment [Line Items]
Useful Life	30 years
Maximum [Member] | Buildings and Improvements - Excluding Waste - to - Energy Facilities [Member]
Property, Plant and Equipment [Line Items]
Useful Life	40 years
Maximum [Member] | Waste-to-Energy Facilities and Related Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	50 years
Maximum [Member] | Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful Life	10 years