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Summary of Reserve for Title Claim Losses - Summary (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Loss Contingencies [Line Items]    
Change in insurance recoverable $ 27 $ (209)
Title    
Loss Contingencies [Line Items]    
Beginning balance 1,810 1,883
Change in insurance recoverable 0 (108)
Claim loss provision related to:    
Current year 100 177
Total title claim loss provision 100 177
Claims paid, net of recoupments related to:    
Current year (4) (7)
Prior years (125) (102)
Total title claims paid, net of recoupments (129) (109)
Ending balance of claim loss reserve for title insurance $ 1,781 $ 1,843
Provision for title insurance claim losses as a percentage of title insurance premiums 4.50% 4.50%