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Acquisitions - Carrying Value and Estimated Useful Lives (Details) - USD ($) $ in Millions | Jan. 01, 2023 | Aug. 09, 2022
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TitlePoint |  |
Property, Plant and Equipment [Line Items] |  |
Gross Carrying Value | $ 73 |
TitlePoint | Customer relationships |  |
Property, Plant and Equipment [Line Items] |  |
Gross Carrying Value | $ 9 |
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 | $ 60 |
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

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- 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 + Details
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