v3.25.4
Revenues - Summary of Revenues by Type (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues $ 7,476 $ 7,258
Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 7,476 7,258
Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 6,084 5,882
Transactions [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 902 857
Global Print [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 490 519
Legal Professionals [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 2,868 2,922
Legal Professionals [member] | Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 2,789 2,828
Legal Professionals [member] | Transactions [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 79 94
Corporates [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 1,987 1,844
Corporates [member] | Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 1,670 1,543
Corporates [member] | Transactions [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 317 301
Tax, Audit & Accounting Professionals [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 1,302 1,165
Tax, Audit & Accounting Professionals [member] | Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 937 867
Tax, Audit & Accounting Professionals [member] | Transactions [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 365 298
Reuters [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 853 832
Reuters [member] | Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 712 668
Reuters [member] | Transactions [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 141 164
Global Print [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] 490 519
Global Print [member] | Global Print [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues 490 519
Eliminations/ Rounding [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues [1] (24) (24)
Eliminations/ Rounding [member] | Recurring [member] | Operating segments [member]    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenues $ (24) $ (24)
[1] Revenues by geography are based on the location of the customer. Revenues from the Reuters agreement with the Data & Analytics business of London Stock Exchange Group ("LSEG"), the Company’s largest customer, are included entirely in the U.K. Canada represents the Company's country of domicile. Americas represents North America, Latin America and South America and EMEA represents Europe, Middle East and Africa.