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Schedule IV - Reinsurance (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Title Insurance and Services
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Premiums and escrow fees before reinsurance	$ 6,879	$ 5,265	$ 4,573
Ceded to other companies	22	16	13
Assumed from other companies	0	0	1
Premiums and escrow fees	$ 6,857	$ 5,249	$ 4,561
Percentage of amount assumed to premiums and escrow fees	0.00%	0.00%	0.00%
Specialty Insurance
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items]
Premiums and escrow fees before reinsurance	$ 504	$ 508	$ 483
Ceded to other companies	6	10	12
Assumed from other companies	0	0	0
Premiums and escrow fees	$ 498	$ 498	$ 471
Percentage of amount assumed to premiums and escrow fees	0.00%	0.00%	0.00%

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