Reserve for Known and Incurred but Not Reported Claims - Reconciliation of the Net Incurred and Paid Claims Development Tables to the Liability for Claims and Claim Adjustment Expense (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Claims Development [Line Items]
Liability for unpaid claims and claim adjustment expenses - short-duration	$ 56
Title insurance	1,269	$ 1,210
Total loss reserves, amount	1,325	$ 1,284	$ 1,178	$ 1,063
Property and casualty insurance
Claims Development [Line Items]
Liability for unpaid claims and claim adjustment expenses - short-duration	37
Home warranty
Claims Development [Line Items]
Liability for unpaid claims and claim adjustment expenses - short-duration	$ 19