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Segment and Related Information - Summary (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting Information [Line Items]        
Operating revenues $ 3,822 $ 3,716 $ 11,072 $ 10,833
Income from operations 699 701 2,022 1,932
Operating Group Total [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 3,822 3,716 11,072 10,833
Income from operations 834 837 2,433 2,370
Solid Waste [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 3,238 3,118 9,378 9,079
Income from operations 849 853 2,458 2,436
Tier 1 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 1,229 1,174 3,577 3,435
Income from operations 416 398 1,176 1,159
Tier 2 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 544 546 1,586 1,574
Income from operations 142 142 405 400
Tier 3 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 1,465 1,398 4,215 4,070
Income from operations 291 313 877 877
Other [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 584 598 1,694 1,754
Income from operations (15) (16) (25) (66)
Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 4,624 4,465 13,387 12,993
Operating Segments [Member] | Operating Group Total [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 4,624 4,465 13,387 12,993
Operating Segments [Member] | Solid Waste [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 3,995 3,803 11,538 11,071
Operating Segments [Member] | Tier 1 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 1,506 1,432 4,364 4,189
Operating Segments [Member] | Tier 2 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 671 660 1,947 1,903
Operating Segments [Member] | Tier 3 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 1,818 1,711 5,227 4,979
Operating Segments [Member] | Other [Member]        
Segment Reporting Information [Line Items]        
Operating revenues 629 662 1,849 1,922
Intercompany Operating Revenues [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (802) (749) (2,315) (2,160)
Intercompany Operating Revenues [Member] | Operating Group Total [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (802) (749) (2,315) (2,160)
Intercompany Operating Revenues [Member] | Solid Waste [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (757) (685) (2,160) (1,992)
Intercompany Operating Revenues [Member] | Tier 1 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (277) (258) (787) (754)
Intercompany Operating Revenues [Member] | Tier 2 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (127) (114) (361) (329)
Intercompany Operating Revenues [Member] | Tier 3 [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (353) (313) (1,012) (909)
Intercompany Operating Revenues [Member] | Other [Member]        
Segment Reporting Information [Line Items]        
Operating revenues (45) (64) (155) (168)
Corporate and Other [Member]        
Segment Reporting Information [Line Items]        
Income from operations $ (135) $ (136) $ (411) $ (438)