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Acquisitions and Divestitures (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Nov. 04, 2024	Mar. 31, 2025	Mar. 31, 2024	Nov. 30, 2024
Business Acquisition
Debt repayments		$ (5,163)	$ (4,570)
Operating		(3,647)	(3,140)
Selling, general and administrative		$ (687)	$ (491)
Stericycle [Member]
Business Acquisition
Business acquisition cost (dollars per share)	$ 62
Total consideration, net of cash acquired	$ 7,200
Debt incurred for acquisition	500
Debt repayments	$ (800)
Stericycle [Member] \| Senior Notes, Aggregate [Member]
Business Acquisition
Debt instrument face amount				$ 5,200