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Schedule III - Balance Sheet Captions (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Supplementary Insurance Information By Segment [Line Items] |  |
Deferred policy acquisition costs | $ 20.2 | $ 20.0
Claims reserves | 1,282.4 | 1,325.3
Deferred revenues | 196.8 | 196.9
Title Insurance and Services |  |
Supplementary Insurance Information By Segment [Line Items] |  |
Deferred policy acquisition costs | 0.0 | 0.0
Claims reserves | 1,242.0 | 1,269.3
Deferred revenues | 3.9 | 6.8
Home Warranty |  |
Supplementary Insurance Information By Segment [Line Items] |  |
Deferred policy acquisition costs | 20.2 | 20.0
Claims reserves | 15.7 | 19.5
Deferred revenues | 192.9 | 190.1
Corporate and Eliminations |  |
Supplementary Insurance Information By Segment [Line Items] |  |
Deferred policy acquisition costs | 0.0 | 0.0
Claims reserves | 24.7 | 36.5
Deferred revenues | $ 0.0 | $ 0.0

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