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Summary of Reserve for Title Claim Losses (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Loss Contingencies [Line Items]    
Change in insurance recoverable $ (109) $ (72)
Title    
Loss Contingencies [Line Items]    
Beginning balance 1,883 1,623
Change in insurance recoverable (108) (22)
Claim loss provision related to:    
Current year 177 178
Total title claim loss provision 177 178
Claims paid, net of recoupments related to:    
Current year (7) (2)
Prior years (102) (100)
Total title claims paid, net of recoupments (109) (102)
Ending balance of claim loss reserve for title insurance $ 1,843 $ 1,677
Provision for title insurance claim losses as a percentage of title insurance premiums 4.50% 4.50%