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Schedule IV - Reinsurance (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Title Insurance and Services |  |  |
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |
Premiums and escrow fees before reinsurance | $ 4,321.2 | $ 6,228.2 | $ 6,880.0
Ceded to other companies | 17.6 | 18.9 | 22.0
Assumed from other companies | 2.1 | 1.2 | 0.0
Premiums and escrow fees | $ 4,305.7 | $ 6,210.5 | $ 6,858.0
Percentage of amount assumed to premiums and escrow fees | 0.00% | 0.00% | 0.00%
Home Warranty |  |  |
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |
Premiums and escrow fees before reinsurance | $ 395.6 | $ 413.1 | $ 399.8
Ceded to other companies | 0.0 | 0.0 | 0.0
Assumed from other companies | 0.0 | 0.0 | 0.0
Premiums and escrow fees | $ 395.6 | $ 413.1 | $ 399.8
Percentage of amount assumed to premiums and escrow fees | 0.00% | 0.00% | 0.00%
Corporate and Eliminations | Operating Segments |  |  |
Reinsurance Premiums For Insurance Companies By Product Segment [Line Items] |  |  |
Premiums and escrow fees before reinsurance | $ 0.1 | $ 9.4 | $ 103.5
Ceded to other companies | 0.0 | 0.6 | 5.8
Assumed from other companies | 0.0 | 0.0 | 0.0
Premiums and escrow fees | $ 0.1 | $ 8.8 | $ 97.7
Percentage of amount assumed to premiums and escrow fees | 0.00% | 0.00% | 0.00%

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