Segment and Related Information - Summary (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Operating revenues	$ 3,696	$ 3,511
Income from operations	621	608
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,696	3,511
Income from operations	815	755
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,139	2,958
Income from operations	843	778
Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,215	1,132
Income from operations	394	365
Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	522	502
Income from operations	136	122
Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,402	1,324
Income from operations	313	291
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	557	553
Income from operations	(28)	(23)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,453	4,226
Operating Segments [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,453	4,226
Operating Segments [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,865	3,619
Operating Segments [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,486	1,373
Operating Segments [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	643	613
Operating Segments [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,736	1,633
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	588	607
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(757)	(715)
Intercompany Operating Revenues [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	(757)	(715)
Intercompany Operating Revenues [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	(726)	(661)
Intercompany Operating Revenues [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(271)	(241)
Intercompany Operating Revenues [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(121)	(111)
Intercompany Operating Revenues [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(334)	(309)
Intercompany Operating Revenues [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	(31)	(54)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (194)	$ (147)