Segment and Related Information - Total Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting
Total assets	$ 32,823	$ 31,367
Operating Segments [Member] | Collection and Disposal [Member]
Segment Reporting
Total assets	26,433	26,014
Operating Segments [Member] | Collection and Disposal [Member] | East Tier {Member]
Segment Reporting
Total assets	14,328	14,194
Operating Segments [Member] | Collection and Disposal [Member] | West Tier [Member]
Segment Reporting
Total assets	11,322	11,134
Operating Segments [Member] | Collection and Disposal [Member] | Other Ancillary [Member]
Segment Reporting
Total assets	783	686
Operating Segments [Member] | Recycling Processing and Sales [Member]
Segment Reporting
Total assets	2,282	1,918
Operating Segments [Member] | WM Renewable Energy [Member]
Segment Reporting
Total assets	1,077	693
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting
Total assets	3,392	3,052
Elimination of intercompany investments and advances
Segment Reporting
Total assets	$ (361)	$ (310)