Segment Information (Schedule of Selected Financial Information) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 1,824	$ 2,556	$ 5,920	$ 6,848
Income (loss) before income taxes	(3)	604	268	1,309
Depreciation and amortization	41	39	124	118
Capital expenditures	70	45	194	114
Direct premiums and escrow fees	758	921	2,429	2,624
Agent premiums	910	999	2,795	2,749
Information and other	282	309	899	890
Net investment income	100	51	199	156
Net investment gains (losses)	(226)	276	(402)	429
Operating Segment
Segment Reporting Information [Line Items]
Revenues	1,824	2,556	5,920	6,848
Direct premiums and escrow fees	758	921	2,429	2,624
Agent premiums	910	999	2,795	2,749
Information and other	282	309	899	890
Net investment income	100	51	199	156
Net investment gains (losses)	(226)	276	(402)	429
Operating Segment | Title Insurance and Services
Segment Reporting Information [Line Items]
Revenues	1,883	2,145	5,933	6,053
Income (loss) before income taxes	186	351	644	989
Depreciation and amortization	40	37	120	113
Capital expenditures	69	45	192	112
Direct premiums and escrow fees	656	793	2,115	2,238
Agent premiums	910	999	2,795	2,749
Information and other	279	306	886	881
Net investment income	105	49	227	139
Net investment gains (losses)	(67)	(2)	(90)	46
Operating Segment | Specialty Insurance
Segment Reporting Information [Line Items]
Revenues	105	133	324	421
Income (loss) before income taxes	(6)	(1)	11	25
Depreciation and amortization	1	2	4	5
Capital expenditures	1	0	2	2
Direct premiums and escrow fees	102	128	314	386
Agent premiums	0	0	0	0
Information and other	3	3	13	10
Net investment income	2	2	4	6
Net investment gains (losses)	(2)	0	(7)	19
Operating Segment | Corporate and Eliminations
Segment Reporting Information [Line Items]
Revenues	(164)	278	(337)	374
Income (loss) before income taxes	(183)	254	(387)	295
Depreciation and amortization	0	0	0	0
Capital expenditures	0	0	0	0
Direct premiums and escrow fees	0	0	0	0
Agent premiums	0	0	0	0
Information and other	0	0	0	(1)
Net investment income	(7)	0	(32)	11
Net investment gains (losses)	$ (157)	$ 278	$ (305)	$ 364