v3.26.1
SEGMENT INFORMATION - Financial Information by Segment (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue $ 2,185 $ 1,898 $ 4,264 $ 3,822
Compensation expense 663 635 1,344 1,277
Non-compensation expense 314 297 607 585
Total 977 932 1,951 1,862
Adjusted Operating Income 1,208 966 2,313 1,960
Depreciation and amortization 126 120 248 233
Restructuring 32 27 59 60
Reserve for international non-income tax obligation 2 0 36 0
Duplicate Rent 2 0 2 0
Charges related to asset abandonment 0 1 0 3
Operating income 1,046 818 1,968 1,664
Non-operating income (expense), net 125 (46) 73 (88)
Income before provision for income taxes 1,171 772 2,041 1,576
Eliminations        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue (55) (53) (109) (105)
Intersegment expense   (53)   (105)
Total (55) (53) (109) (105)
Adjusted Operating Income 0 0 0 0
Depreciation and amortization 0 0 0 0
Restructuring 0 0 0 0
Reserve for international non-income tax obligation 0 0 0 0
Duplicate Rent 0 0 0 0
Charges related to asset abandonment 0 0 0 0
MA        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 925 888 1,851 1,747
Compensation expense 357 355 731 717
Non-compensation expense 207 200 409 392
MA | Eliminations        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 3 3 6 6
Intersegment expense 52 50 103 99
MA | Operating Segments        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 928 891 1,857 1,753
Total 616 605 1,243 1,208
Adjusted Operating Income 312 286 614 545
Depreciation and amortization 102 97 202 191
Restructuring 27 18 47 44
Reserve for international non-income tax obligation 2 0 36 0
Duplicate Rent 1 0 1 0
Charges related to asset abandonment 0 1 0 3
MIS        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 1,260 1,010 2,413 2,075
Compensation expense 306 280 613 560
Non-compensation expense 107 97 198 193
MIS | Eliminations        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 52 50 103 99
Intersegment expense 3 3 6 6
MIS | Operating Segments        
Segment Reporting, Operating Income (Loss) [Abstract]        
Revenue 1,312 1,060 2,516 2,174
Total 416 380 817 759
Adjusted Operating Income 896 680 1,699 1,415
Depreciation and amortization 24 23 46 42
Restructuring 5 9 12 16
Reserve for international non-income tax obligation 0 0 0 0
Duplicate Rent 1 0 1 0
Charges related to asset abandonment $ 0 $ 0 $ 0 $ 0