Landfill and Environmental Remediation Liabilities - Changes to Landfill and Environmental Remediation Liabilities (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Environmental Exit Cost [Line Items]
Risk-free discount rate of the obligations		2.50%	2.25%	2.00%
Increase (Decrease) to operating expenses due to change in discount rate used to estimate the present value of environmental remediation obligations		$ (2)	$ (3)
Increase in cost estimate associated with environmental remediation liability		44
San Jacinto Waste Pits [Member]
Environmental Exit Cost [Line Items]
Increase in cost estimate associated with environmental remediation liability	$ 42	44
Landfill [Member]
Environmental Exit Cost [Line Items]
Increase (decrease) related to year-end review of landfill capping closure and post closure obligations included in landfill liabilities		(11)	(18)
Increase in landfill liabilities related to landfill impairment		$ 13
Increase (Decrease) in landfill liabilities			7
Deffenbaugh Disposal, Inc. [Member] | Landfill [Member]
Environmental Exit Cost [Line Items]
Increase (Decrease) in landfill liabilities			$ 18