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v3.25.2

Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Income (Loss) Reclassification Adjustments (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |
Pretax change before reclassifications | $ 55.6 |  | $ (12.4) |  | $ 182.4 | $ (97.6)
Reclassifications out of AOCI | 5.8 |  | 1.5 |  | 7.8 | 5.5
Tax effect | (7.2) |  | 1.7 |  | (39.4) | 18.2
Total other comprehensive income (loss), net of tax | 54.2 | $ 96.6 | (9.2) | $ (64.7) | 150.8 | (73.9)
Unrealized Gains (Losses) on Debt Securities |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |
Pretax change before reclassifications | 19.9 |  | (8.4) |  | 142.8 | (78.7)
Reclassifications out of AOCI | 5.4 |  | 1.0 |  | 6.9 | 4.4
Tax effect | (6.3) |  | 1.6 |  | (38.4) | 17.9
Total other comprehensive income (loss), net of tax | 19.0 |  | (5.8) |  | 111.3 | (56.4)
Foreign Currency Translation Adjustment |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |
Pretax change before reclassifications | 35.7 |  | (4.0) |  | 39.6 | (18.9)
Reclassifications out of AOCI | 0.0 |  | 0.0 |  | 0.0 | 0.0
Tax effect | (0.8) |  | 0.2 |  | (0.8) | 0.6
Total other comprehensive income (loss), net of tax | 34.9 |  | (3.8) |  | 38.8 | (18.3)
Pension Benefit Adjustment |  |  |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |  |  |
Pretax change before reclassifications | 0.0 |  | 0.0 |  | 0.0 | 0.0
Reclassifications out of AOCI | 0.4 |  | 0.5 |  | 0.9 | 1.1
Tax effect | (0.1) |  | (0.1) |  | (0.2) | (0.3)
Total other comprehensive income (loss), net of tax | $ 0.3 |  | $ 0.4 |  | $ 0.7 | $ 0.8

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