v3.25.4

Revenues by Geography, Concentration of Credit Risk and Remaining Performance Obligations - Summary of Revenues by Geographical Region and Reportable Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue
Total revenues	$ 16,310	$ 15,405	$ 14,984
Americas
Disaggregation of Revenue
Total revenues	7,745	7,356	7,552
Europe and Africa
Disaggregation of Revenue
Total revenues	5,185	4,920	4,459
Asia-Pacific
Disaggregation of Revenue
Total revenues	3,380	3,129	2,973
Technology & Analytics Solutions
Disaggregation of Revenue
Total revenues	6,626	6,160	5,862
Technology & Analytics Solutions | Americas
Disaggregation of Revenue
Total revenues	3,363	3,182	3,091
Technology & Analytics Solutions | Europe and Africa
Disaggregation of Revenue
Total revenues	2,646	2,397	2,156
Technology & Analytics Solutions | Asia-Pacific
Disaggregation of Revenue
Total revenues	617	581	615
Research & Development Solutions
Disaggregation of Revenue
Total revenues	8,896	8,527	8,395
Research & Development Solutions | Americas
Disaggregation of Revenue
Total revenues	4,105	3,894	4,157
Research & Development Solutions | Europe and Africa
Disaggregation of Revenue
Total revenues	2,273	2,304	2,103
Research & Development Solutions | Asia-Pacific
Disaggregation of Revenue
Total revenues	2,518	2,329	2,135
Contract Sales & Medical Solutions
Disaggregation of Revenue
Total revenues	788	718	727
Contract Sales & Medical Solutions | Americas
Disaggregation of Revenue
Total revenues	277	280	304
Contract Sales & Medical Solutions | Europe and Africa
Disaggregation of Revenue
Total revenues	266	219	200
Contract Sales & Medical Solutions | Asia-Pacific
Disaggregation of Revenue
Total revenues	$ 245	$ 219	$ 223

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