Segment and Related Information - Summary (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Operating revenues	$ 3,561	$ 3,946	$ 7,290	$ 7,642
Income from operations	527	696	1,100	1,317
Asset impairments	61
Landfills and Oil Field Waste Injection Facility [Member]
Segment Reporting Information [Line Items]
Asset impairments	41
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,561	3,946	7,290	7,642
Income from operations	710	897	1,530	1,747
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,032	3,396	6,236	6,535
Income from operations	720	946	1,565	1,814
Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,147	1,280	2,370	2,468
Income from operations	316	434	709	832
Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	707	796	1,441	1,518
Income from operations	182	230	370	430
Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,178	1,320	2,425	2,549
Income from operations	222	282	486	552
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	529	550	1,054	1,107
Income from operations	(10)	(49)	(35)	(67)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,322	4,779	8,852	9,232
Operating Segments [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,322	4,779	8,852	9,232
Operating Segments [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,768	4,199	7,744	8,064
Operating Segments [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,418	1,573	2,921	3,026
Operating Segments [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	897	995	1,829	1,899
Operating Segments [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,453	1,631	2,994	3,139
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	554	580	1,108	1,168
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(761)	(833)	(1,562)	(1,590)
Intercompany Operating Revenues [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	(761)	(833)	(1,562)	(1,590)
Intercompany Operating Revenues [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	(736)	(803)	(1,508)	(1,529)
Intercompany Operating Revenues [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(271)	(293)	(551)	(558)
Intercompany Operating Revenues [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(190)	(199)	(388)	(381)
Intercompany Operating Revenues [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(275)	(311)	(569)	(590)
Intercompany Operating Revenues [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	(25)	(30)	(54)	(61)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (183)	$ (201)	$ (430)	$ (430)