Acquisitions and Divestitures (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Nov. 04, 2024	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Nov. 30, 2024
Business Acquisition
Debt repayments				$ 9,234	$ 8,752
Operating		$ (3,839)	$ (3,291)	(7,486)	(6,431)
Selling, general and administrative		$ (696)	$ (501)	(1,383)	$ (992)
Contingent consideration paid for acquisitions closed in previous year				8
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
2025 Business Acquisitions [Member]
Business Acquisition
Total consideration, net of cash acquired				411
Business acquisitions cash payments				370
Other consideration				$ 41