Segment Information (Narrative) (Detail) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($) State	Mar. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of states issues title insurance policies \| State	49
Number of states issues home warranty contracts \| State	35
Net investment gains (losses) \| $	$ (43)	$ 67
Corporate
Segment Reporting Information [Line Items]
Net investment gains (losses) \| $		$ 42

Amount of realized and unrealized gain (loss) on investment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(c),9(a))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 28
-Subparagraph (b)
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