Acquisitions and Divestitures - Intangible Allocation (Detail) - USD ($) $ in Millions	Nov. 04, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stericycle [Member]
Intangible assets
Other intangible assets	$ 3,536
Stericycle [Member] | Trade Names [Member]
Intangible assets
Other intangible assets	630
Stericycle [Member] | Customer Relationships [Member]
Intangible assets
Other intangible assets	$ 2,279
Weighted average amortization periods	15 years
Stericycle [Member] | Permits [Member]
Intangible assets
Other intangible assets	$ 319
Stericycle [Member] | Trade Names [Member]
Intangible assets
Other intangible assets	$ 162
Weighted average amortization periods	2 years 2 months 12 days
Stericycle [Member] | ERP software [Member]
Intangible assets
Other intangible assets	$ 141
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		$ 79	$ 44	$ 64
Aggregate smaller acquisitions [Member] | Customer Relationships [Member]
Intangible assets
Other intangible assets		63	34	45
Aggregate smaller acquisitions [Member] | Noncompete Agreements [Member]
Intangible assets
Other intangible assets		$ 14	$ 10	$ 19