v3.25.4
Goodwill - Summary of Carrying Amount of Goodwill by Cash Generating Unit (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Oct. 01, 2025
Dec. 31, 2024
Disclosure of information for cash-generating units [Line Items]      
Goodwill $ 7,913 $ 7,909 $ 7,262
Legal Professionals [Member]      
Disclosure of information for cash-generating units [Line Items]      
Goodwill   3,697  
Corporates [Member]      
Disclosure of information for cash-generating units [Line Items]      
Goodwill   2,069  
Tax, Audit & Accounting Professionals [Member]      
Disclosure of information for cash-generating units [Line Items]      
Goodwill   1,663  
Reuters [member]      
Disclosure of information for cash-generating units [Line Items]      
Goodwill   231  
Global Print [Member]      
Disclosure of information for cash-generating units [Line Items]      
Goodwill   $ 249