v3.25.4
Segments - Operations by Reportable Segments (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 09, 2025
Mar. 10, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information          
Revenues     $ 16,310 $ 15,405 $ 14,984
Cost of revenues, exclusive of depreciation and amortization     10,880 10,030 9,745
Selling, general and administrative expenses     1,999 1,992 2,053
Depreciation and amortization     (1,144) (1,114) (1,125)
Restructuring costs     (105) (67) (84)
Total income from operations     2,182 2,202 1,977
Interest expense     729 670 672
Investment Income, Interest     (45) (47) (36)
Loss on extinguishment of debt $ 2 $ 4 6 0 6
Other expense, net     (99) (90) (124)
Income before income taxes and equity in earnings of unconsolidated affiliates     1,591 1,669 1,459
Technology & Analytics Solutions          
Segment Reporting Information          
Revenues     6,626 6,160 5,862
Research & Development Solutions          
Segment Reporting Information          
Revenues     8,896 8,527 8,395
Contract Sales & Medical Solutions          
Segment Reporting Information          
Revenues     788 718 727
Operating Segments          
Segment Reporting Information          
Selling, general and administrative expenses     1,914 1,858 1,785
Segment profit     3,516 3,517 3,454
Operating Segments | Technology & Analytics Solutions          
Segment Reporting Information          
Revenues     6,626 6,160 5,862
Cost of revenues, exclusive of depreciation and amortization     4,076 3,721 3,496
Selling, general and administrative expenses     955 917 876
Segment profit     1,595 1,522 1,490
Operating Segments | Research & Development Solutions          
Segment Reporting Information          
Revenues     8,896 8,527 8,395
Cost of revenues, exclusive of depreciation and amortization     6,124 5,698 5,629
Selling, general and administrative expenses     899 881 851
Segment profit     1,873 1,948 1,915
Operating Segments | Contract Sales & Medical Solutions          
Segment Reporting Information          
Revenues     788 718 727
Cost of revenues, exclusive of depreciation and amortization     680 611 620
Selling, general and administrative expenses     60 60 58
Segment profit     48 47 49
General corporate and unallocated expenses          
Segment Reporting Information          
Segment profit     $ (85) $ (134) $ (268)