Segment and Related Information - Summary (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Operating revenues	$ 3,967	$ 3,822	$ 11,609	$ 11,072
Income from operations	734	699	2,051	2,022
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,967	3,822	11,609	11,072
Income from operations	900	834	2,576	2,433
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,411	3,238	9,946	9,378
Income from operations	936	849	2,700	2,458
Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,310	1,229	3,835	3,577
Income from operations	432	416	1,258	1,176
Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	579	544	1,670	1,586
Income from operations	153	142	437	405
Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,522	1,465	4,441	4,215
Income from operations	351	291	1,005	877
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	556	584	1,663	1,694
Income from operations	(36)	(15)	(124)	(25)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,804	4,624	14,036	13,387
Operating Segments [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,804	4,624	14,036	13,387
Operating Segments [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,215	3,995	12,279	11,538
Operating Segments [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,610	1,506	4,704	4,364
Operating Segments [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	714	671	2,060	1,947
Operating Segments [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,891	1,818	5,515	5,227
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	589	629	1,757	1,849
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(837)	(802)	(2,427)	(2,315)
Intercompany Operating Revenues [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	(837)	(802)	(2,427)	(2,315)
Intercompany Operating Revenues [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	(804)	(757)	(2,333)	(2,160)
Intercompany Operating Revenues [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(300)	(277)	(869)	(787)
Intercompany Operating Revenues [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(135)	(127)	(390)	(361)
Intercompany Operating Revenues [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(369)	(353)	(1,074)	(1,012)
Intercompany Operating Revenues [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	(33)	(45)	(94)	(155)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (166)	$ (135)	$ (525)	$ (411)