v3.25.4

Goodwill and Identifiable Intangible Assets - Summary of Goodwill by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill
Beginning Balance	$ 14,710	$ 14,567
Business combinations	1,279	532
Impact of foreign currency fluctuations and other	627	(389)
Ending Balance	16,616	14,710
Technology & Analytics Solutions
Goodwill
Beginning Balance	11,957	11,976
Business combinations	865	346
Impact of foreign currency fluctuations and other	602	(365)
Ending Balance	13,424	11,957
Research & Development Solutions
Goodwill
Beginning Balance	2,608	2,439
Business combinations	394	186
Impact of foreign currency fluctuations and other	23	(17)
Ending Balance	3,025	2,608
Contract Sales & Medical Solutions
Goodwill
Beginning Balance	145	152
Business combinations	20	0
Impact of foreign currency fluctuations and other	2	(7)
Ending Balance	$ 167	$ 145

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