Acquisitions and Divestitures - Intangible Allocation (Detail) - USD ($) $ in Millions	Nov. 04, 2024	Dec. 31, 2025	Nov. 04, 2025	Dec. 31, 2024	Dec. 31, 2023
Stericycle [Member]
Intangible assets
Other intangible assets	$ 3,500		$ 3,493
Stericycle [Member] \| Trade Names [Member]
Intangible assets
Other intangible assets	610
Stericycle [Member] \| Permits [Member]
Intangible assets
Other intangible assets	319
Stericycle [Member] \| Customer Relationships [Member]
Intangible assets
Other intangible assets	$ 2,300
Weighted average amortization periods	15 years
Stericycle [Member] \| Trade Names [Member]
Intangible assets
Other intangible assets	$ 114
Weighted average amortization periods	2 years 10 months 24 days
Stericycle [Member] \| ERP software [Member]
Intangible assets
Other intangible assets	$ 138
Weighted average amortization periods	4 years 8 months 12 days
Stericycle [Member] \| Developed technology [Member]
Intangible assets
Other intangible assets	$ 5
Weighted average amortization periods	17 years
Aggregate smaller acquisitions [Member]
Intangible assets
Other intangible assets		$ 45		$ 79	$ 44
Aggregate smaller acquisitions [Member] \| Customer Relationships [Member]
Intangible assets
Other intangible assets		$ 39		$ 63	$ 34

WASTE MANAGEMENT INC 10-K