Property and Equipment - Property and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment
Property and equipment , gross	$ 43,117	$ 39,794
Less accumulated depreciation, depletion and amortization	(23,777)	(22,826)
Property and equipment, net	19,340	16,968
Land [Member]
Property, Plant and Equipment
Property and equipment , gross	873	772
Landfill [Member]
Property, Plant and Equipment
Property and equipment , gross	20,273	19,473
Vehicles [Member]
Property, Plant and Equipment
Property and equipment , gross	7,065	6,581
Machinery and Equipment [Member]
Property, Plant and Equipment
Property and equipment , gross	5,757	4,989
Machinery and Equipment [Member] \| Recycling Processing and Sales [Member]
Property, Plant and Equipment
Property and equipment , gross	1,700	1,500
Machinery and Equipment [Member] \| WM Renewable Energy [Member]
Property, Plant and Equipment
Property and equipment , gross	834	720
Machinery and Equipment [Member] \| WM Healthcare Solutions [Member]
Property, Plant and Equipment
Property and equipment , gross	419
Containers [Member]
Property, Plant and Equipment
Property and equipment , gross	3,369	3,104
Building and Improvements [Member]
Property, Plant and Equipment
Property and equipment , gross	5,210	4,266
Furniture, Fixtures and Office Equipment [Member]
Property, Plant and Equipment
Property and equipment , gross	570	609
Tangible Property and Equipment [Member]
Property, Plant and Equipment
Less accumulated depreciation, depletion and amortization	(11,518)	(11,183)
Landfill Airspace [Member]
Property, Plant and Equipment
Less accumulated depreciation, depletion and amortization	(12,259)	(11,643)
Construction in Progress [Member]
Property, Plant and Equipment
Property and equipment, net	$ 3,400	$ 2,800

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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- Definition

Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Publisher FASB
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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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