Segment and Related Information - Summary (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Operating revenues	$ 3,739	$ 3,677	$ 7,250	$ 7,117
Income from operations	715	673	1,323	1,231
Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,739	3,677	7,250	7,117
Income from operations	844	815	1,599	1,533
Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,182	3,076	6,140	5,961
Income from operations	831	833	1,609	1,583
Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,216	1,159	2,348	2,261
Income from operations	395	395	760	761
Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	540	537	1,042	1,028
Income from operations	141	142	263	258
Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,426	1,380	2,750	2,672
Income from operations	295	296	586	564
Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	557	601	1,110	1,156
Income from operations	13	(18)	(10)	(50)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,537	4,416	8,763	8,528
Operating Segments [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	4,537	4,416	8,763	8,528
Operating Segments [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	3,924	3,759	7,543	7,268
Operating Segments [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,485	1,417	2,858	2,757
Operating Segments [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	663	651	1,276	1,243
Operating Segments [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	1,776	1,691	3,409	3,268
Operating Segments [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	613	657	1,220	1,260
Intercompany Operating Revenues [Member]
Segment Reporting Information [Line Items]
Operating revenues	(798)	(739)	(1,513)	(1,411)
Intercompany Operating Revenues [Member] | Operating Group Total [Member]
Segment Reporting Information [Line Items]
Operating revenues	(798)	(739)	(1,513)	(1,411)
Intercompany Operating Revenues [Member] | Solid Waste [Member]
Segment Reporting Information [Line Items]
Operating revenues	(742)	(683)	(1,403)	(1,307)
Intercompany Operating Revenues [Member] | Tier 1 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(269)	(258)	(510)	(496)
Intercompany Operating Revenues [Member] | Tier 2 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(123)	(114)	(234)	(215)
Intercompany Operating Revenues [Member] | Tier 3 [Member]
Segment Reporting Information [Line Items]
Operating revenues	(350)	(311)	(659)	(596)
Intercompany Operating Revenues [Member] | Other [Member]
Segment Reporting Information [Line Items]
Operating revenues	(56)	(56)	(110)	(104)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Income from operations	$ (129)	$ (142)	$ (276)	$ (302)