v3.23.2
REVENUE RECOGNITION - Disaggregation of Operating Revenue (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Disaggregation Of Revenue [Line Items]        
Operating revenues $ 621,157 $ 551,806 $ 1,213,375 $ 1,111,751
Index        
Disaggregation Of Revenue [Line Items]        
Operating revenues 362,316 320,949 701,698 651,708
Analytics        
Disaggregation Of Revenue [Line Items]        
Operating revenues 149,881 141,684 296,951 281,481
ESG and Climate        
Disaggregation Of Revenue [Line Items]        
Operating revenues 71,219 55,128 138,277 107,157
All Other - Private Assets        
Disaggregation Of Revenue [Line Items]        
Operating revenues 37,741 34,045 76,449 71,405
Recurring subscriptions        
Disaggregation Of Revenue [Line Items]        
Operating revenues 455,692 407,049 900,939 806,809
Recurring subscriptions | Index        
Disaggregation Of Revenue [Line Items]        
Operating revenues 200,714 179,711 397,392 354,209
Recurring subscriptions | Analytics        
Disaggregation Of Revenue [Line Items]        
Operating revenues 147,504 139,497 292,007 277,296
Recurring subscriptions | ESG and Climate        
Disaggregation Of Revenue [Line Items]        
Operating revenues 70,047 54,037 135,779 104,609
Recurring subscriptions | All Other - Private Assets        
Disaggregation Of Revenue [Line Items]        
Operating revenues 37,427 33,804 75,761 70,695
Asset-based fees        
Disaggregation Of Revenue [Line Items]        
Operating revenues 138,162 132,216 271,288 277,269
Asset-based fees | Index        
Disaggregation Of Revenue [Line Items]        
Operating revenues 138,162 132,216 271,288 277,269
Asset-based fees | Analytics        
Disaggregation Of Revenue [Line Items]        
Operating revenues 0 0 0 0
Asset-based fees | ESG and Climate        
Disaggregation Of Revenue [Line Items]        
Operating revenues 0 0 0 0
Asset-based fees | All Other - Private Assets        
Disaggregation Of Revenue [Line Items]        
Operating revenues 0 0 0 0
Non-recurring        
Disaggregation Of Revenue [Line Items]        
Operating revenues 27,303 12,541 41,148 27,673
Non-recurring | Index        
Disaggregation Of Revenue [Line Items]        
Operating revenues 23,440 9,022 33,018 20,230
Non-recurring | Analytics        
Disaggregation Of Revenue [Line Items]        
Operating revenues 2,377 2,187 4,944 4,185
Non-recurring | ESG and Climate        
Disaggregation Of Revenue [Line Items]        
Operating revenues 1,172 1,091 2,498 2,548
Non-recurring | All Other - Private Assets        
Disaggregation Of Revenue [Line Items]        
Operating revenues $ 314 $ 241 $ 688 $ 710