Segment and Related Information - Summary (Detail) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of segments | segment				2
Operating revenues		$ 5,198	$ 5,075	$ 15,209	$ 14,763
Income from operations		1,021	942	2,790	2,600
Alternative fuel tax credits	$ 26
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues		4,328	4,221	12,695	12,260
Solid Waste [Member] | East Tier Region Areas {Member]
Segment Reporting Information [Line Items]
Operating revenues		2,214	2,144	6,514	6,195
Solid Waste [Member] | West Tier Region Areas [Member]
Segment Reporting Information [Line Items]
Operating revenues		2,114	2,077	6,181	6,065
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		870	854	2,514	2,503
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues		6,413	6,184	18,775	17,952
Income from operations		1,311	1,238	3,659	3,526
Operating Segments [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues		5,483	5,272	16,089	15,282
Income from operations		1,324	1,238	3,689	3,507
Operating Segments [Member] | Solid Waste [Member] | East Tier Region Areas {Member]
Segment Reporting Information [Line Items]
Operating revenues		2,789	2,652	8,192	7,644
Income from operations		671	616	1,846	1,728
Operating Segments [Member] | Solid Waste [Member] | West Tier Region Areas [Member]
Segment Reporting Information [Line Items]
Operating revenues		2,694	2,620	7,897	7,638
Income from operations		653	622	1,843	1,779
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		930	912	2,686	2,670
Income from operations		(13)		(30)	19
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues		(1,215)	(1,109)	(3,566)	(3,189)
Intercompany Operating Revenues [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues		(1,155)	(1,051)	(3,394)	(3,022)
Intercompany Operating Revenues [Member] | Solid Waste [Member] | East Tier Region Areas {Member]
Segment Reporting Information [Line Items]
Operating revenues		(575)	(508)	(1,678)	(1,449)
Intercompany Operating Revenues [Member] | Solid Waste [Member] | West Tier Region Areas [Member]
Segment Reporting Information [Line Items]
Operating revenues		(580)	(543)	(1,716)	(1,573)
Intercompany Operating Revenues [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues		(60)	(58)	(172)	(167)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations		$ (290)	$ (296)	$ (869)	$ (926)