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Schedule III - Income Statement Captions (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Supplementary Insurance Information By Segment [Line Items] |  |  |  |
Premiums and escrow fees |  | $ 4,701.4 | $ 6,632.4 | $ 7,355.5
Net investment income (1) | [1] | 363.6 | (175.7) | 650.4
Loss provision |  | 336.3 | 486.3 | 588.7
Amortization of deferred policy acquisition costs (credits) |  | (0.2) | 4.3 | 10.8
Other operating expenses |  | 1,067.0 | 1,272.3 | 1,322.9
Premiums written |  | 398.4 | 393.9 | 449.9
Operating Segments | Title Insurance and Services |  |  |  |
Supplementary Insurance Information By Segment [Line Items] |  |  |  |
Premiums and escrow fees |  | 4,305.7 | 6,210.5 | 6,858.0
Net investment income (1) | [1] | 502.0 | 209.3 | 259.9
Loss provision |  | 139.9 | 248.4 | 274.4
Amortization of deferred policy acquisition costs (credits) |  | 0.0 | 0.0 | 0.0
Other operating expenses |  | 937.7 | 1,155.4 | 1,197.7
Premiums written |  | 0.0 | 0.0 | 0.0
Operating Segments | Home Warranty |  |  |  |
Supplementary Insurance Information By Segment [Line Items] |  |  |  |
Premiums and escrow fees |  | 395.6 | 413.1 | 399.8
Net investment income (1) | [1] | (0.1) | (7.4) | 11.2
Loss provision |  | 193.1 | 211.8 | 218.2
Amortization of deferred policy acquisition costs (credits) |  | (0.2) | 1.9 | (5.3)
Other operating expenses |  | 82.8 | 75.7 | 61.5
Premiums written |  | 398.4 | 394.9 | 412.6
Operating Segments | Corporate and Eliminations |  |  |  |
Supplementary Insurance Information By Segment [Line Items] |  |  |  |
Premiums and escrow fees |  | 0.1 | 8.8 | 97.7
Net investment income (1) | [1] | (138.3) | (377.6) | 379.3
Loss provision |  | 3.3 | 26.1 | 96.1
Amortization of deferred policy acquisition costs (credits) |  | 0.0 | 2.4 | 16.1
Other operating expenses |  | 46.5 | 41.2 | 63.7
Premiums written |  | $ 0.0 | $ (1.0) | $ 37.3
[1] | Includes net investment income and net investment gains (losses).

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