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Goodwill (Carrying Amount of Goodwill by Reportable Segment) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Line Items]    
Goodwill, Beginning Balance $ 1,588 $ 1,379
Acquisitions 217 209
Transfers 0  
Foreign currency translation (7)  
Accumulated impairment losses Ending Balance (34)  
Goodwill, Ending Balance 1,798 1,588
Title Insurance and Services    
Goodwill [Line Items]    
Goodwill, Beginning Balance 1,575 1,366
Acquisitions 217 209
Transfers (28)  
Foreign currency translation (7)  
Accumulated impairment losses Ending Balance 0  
Goodwill, Ending Balance 1,757 1,575
Specialty Insurance    
Goodwill [Line Items]    
Goodwill, Beginning Balance 13 13
Acquisitions 0 0
Transfers 28  
Foreign currency translation 0  
Accumulated impairment losses Ending Balance (34)  
Goodwill, Ending Balance $ 41 $ 13