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Summary of Reserve for Title Claim Losses - Summary (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Loss Contingencies [Line Items]    
Change in insurance recoverable $ 79 $ (47)
Title    
Loss Contingencies [Line Items]    
Beginning balance 1,810 1,883
Change in insurance recoverable 0 (1)
Claim loss provision related to:    
Current year 43 84
Total title claim loss provision 43 84
Claims paid, net of recoupments related to:    
Current year (1) (1)
Prior years (61) (53)
Total title claims paid, net of recoupments (62) (54)
Ending balance of claim loss reserve for title insurance $ 1,791 $ 1,912
Provision for title insurance claim losses as a percentage of title insurance premiums 4.50% 4.50%