Acquisitions and Divestitures - Intangible Allocation (Detail) - Stericycle [Member] - USD ($) $ in Millions	Nov. 04, 2024	Mar. 31, 2025
Intangible assets
Other intangible assets	$ 3,468	$ 3,468
Trade Names [Member]
Intangible assets
Other intangible assets	610
Permits [Member]
Intangible assets
Other intangible assets	319
Customer Relationships [Member]
Intangible assets
Other intangible assets	$ 2,279
Weighted average amortization periods	15 years
Trade Names [Member]
Intangible assets
Other intangible assets	$ 114
Weighted average amortization periods	2 years 10 months 24 days
ERP software [Member]
Intangible assets
Other intangible assets	$ 141
Weighted average amortization periods	4 years 8 months 12 days
Developed technology [Member]
Intangible assets
Other intangible assets	$ 5
Weighted average amortization periods	17 years