Acquisitions and Divestitures (Detail) $ / shares in Units, $ in Millions			12 Months Ended
	Apr. 14, 2019 USD ($) item $ / shares	Mar. 08, 2019 item	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($) item	Dec. 31, 2017 USD ($) item	Jun. 28, 2019
Business Acquisition [Line Items]
Total enterprise value			$ 515	$ 471	$ 205
Number of business acquired | item			18	32	24
Business acquisitions closed during the year, cash payments			$ 501	$ 440	$ 183
Other consideration			14	31	22
Increase (decrease) in contingent consideration			(6)
Contingent consideration paid for acquisitions closed in previous year			4	6	3
Purchase price holdbacks paid			20	20	14
Purchase price holdbacks paid for acquisitions closed in current year			9	15	13
Allocation of consideration to property and equipment			350	115	127
Allocation of consideration to other intangible assets			53	141	46
Allocation of consideration to goodwill			$ 111	$ 248	$ 39
Advanced Disposal Services [Member]
Business Acquisition [Line Items]
Price per share | $ / shares	$ 33.15
Total enterprise value	$ 4,900
Advanced Disposal's net debt	$ 1,900
Number of collection operations | item	95
Number of transfer stations | item	73
Number of landfills | item	41
Number of owned or operated recycling facilities | item	22
Merger approval percentage						85.90%
Petro Waste Environmental [Member]
Business Acquisition [Line Items]
Number of landfills | item		7