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Summary of Reserve for Title Claim Losses (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Loss Contingencies [Line Items]    
Change in insurance recoverable $ 12 $ 38
Title    
Loss Contingencies [Line Items]    
Beginning balance 1,883 1,623
Change in insurance recoverable (1) 25
Claim loss provision related to:    
Current year 84 81
Total title claim loss provision 84 81
Claims paid, net of recoupments related to:    
Current year (1) 0
Prior years (53) (46)
Total title claims paid, net of recoupments (54) (46)
Ending balance of claim loss reserve for title insurance $ 1,912 $ 1,683
Provision for title insurance claim losses as a percentage of title insurance premiums 4.50% 4.50%