Segment Information (Schedule of Selected Financial Information) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ 2,034	$ 2,026
Income (loss) before income taxes	130	306
Depreciation and amortization	41	38
Capital expenditures	50	31
Direct premiums and escrow fees	774	786
Agent premiums	948	845
Information and other	309	279
Net investment income	46	49
Net investment gains (losses)	(43)	67
Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,034	2,027
Direct premiums and escrow fees	774	786
Agent premiums	948	845
Information and other	309	279
Net investment income	46	50
Net investment gains (losses)	(43)	67
Operating Segments | Title Insurance and Services
Segment Reporting Information [Line Items]
Revenues	1,998	1,844
Income (loss) before income taxes	220	280
Depreciation and amortization	40	36
Capital expenditures	49	30
Direct premiums and escrow fees	666	658
Agent premiums	948	845
Information and other	302	276
Net investment income	53	43
Net investment gains (losses)	29	22
Operating Segments | Specialty Insurance
Segment Reporting Information [Line Items]
Revenues	115	136
Income (loss) before income taxes	12	6
Depreciation and amortization	1	2
Capital expenditures	1	1
Direct premiums and escrow fees	108	128
Agent premiums	0	0
Information and other	7	3
Net investment income	1	2
Net investment gains (losses)	(1)	3
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Revenues	(79)	47
Income (loss) before income taxes	(102)	20
Depreciation and amortization	0	0
Capital expenditures	0	0
Direct premiums and escrow fees	0	0
Agent premiums	0	0
Information and other	0	0
Net investment income	(8)	5
Net investment gains (losses)	$ (71)	42
Eliminations
Segment Reporting Information [Line Items]
Revenues		(1)
Income (loss) before income taxes		0
Depreciation and amortization		0
Capital expenditures		$ 0