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Acquisitions - Carrying Value and Estimated Useful Lives (Details) - USD ($) $ in Millions	Jan. 01, 2023	Aug. 09, 2022
TitlePoint
Property, Plant and Equipment [Line Items]
Gross Carrying Value	$ 54
TitlePoint | Customer relationships
Property, Plant and Equipment [Line Items]
Gross Carrying Value	$ 3
Weighted Average Estimated Useful Life (in years)	10 years
TitlePoint | Trade name
Property, Plant and Equipment [Line Items]
Gross Carrying Value	$ 4
Weighted Average Estimated Useful Life (in years)	10 years
TitlePoint | Software
Property, Plant and Equipment [Line Items]
Gross Carrying Value	$ 47
Weighted Average Estimated Useful Life (in years)	7 years
AllFirst Title Insurance Agency
Property, Plant and Equipment [Line Items]
Gross Carrying Value		$ 55
AllFirst Title Insurance Agency | Customer relationships
Property, Plant and Equipment [Line Items]
Gross Carrying Value		$ 46
Weighted Average Estimated Useful Life (in years)		10 years
AllFirst Title Insurance Agency | Trade name
Property, Plant and Equipment [Line Items]
Gross Carrying Value		$ 7
Weighted Average Estimated Useful Life (in years)		10 years
AllFirst Title Insurance Agency | Non-compete agreements
Property, Plant and Equipment [Line Items]
Gross Carrying Value		$ 1
Weighted Average Estimated Useful Life (in years)		5 years
AllFirst Title Insurance Agency | Software
Property, Plant and Equipment [Line Items]
Gross Carrying Value		$ 1
Weighted Average Estimated Useful Life (in years)		2 years

X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-1

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X

- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479303/805-10-55-37

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-1

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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