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v3.23.4

Segment Reporting - Summary of Gross and Net Written and Earned Premiums, Underwriting Results, Ratios and Reserves for Each of Company's Business Segments (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |
Gross written premiums | $ 2,125.2 | $ 2,351.3 | $ 4,338.7 | $ 3,938.4 | $ 3,698.5 |
Net written premiums | 1,350.5 | 1,506.1 | 2,896.0 | 2,587.7 | 2,577.8 |
Gross earned premiums |  |  | 3,988.0 | 3,618.3 | 3,638.4 |
Net earned premiums | 1,287.4 | 1,327.2 | 2,688.7 | 2,410.5 | 2,527.5 |
Losses and loss adjustment expenses | 717.1 | 767.7 | 1,680.0 | 1,693.3 | 1,840.8 |
Acquisition costs | 192.9 | 216.5 | 431.8 | 414.1 | 465.7 |
General and administrative expenses | 169.0 | 186.5 | 386.5 | 333.1 | 308.0 |
Underwriting income (loss) | 208.4 | 156.5 | 190.4 | (30.0) | (87.0) |
Corporate Expenses | (53.1) | (37.5) | (71.7) | (64.3) | (70.2) |
Non-operating expenses (1) | (10.6) | (3.6) | (36.0) | (20.6) | (32.7) |
Net investment income (1) | 129.4 | 88.7 | 188.1 | 147.5 | 154.6 |
Realized and unrealized investment gains | 36.1 | 2.5 | 5.0 | 56.2 | 98.5 |
Realized and unrealized investment losses | (18.1) | (128.9) | (182.6) | (47.4) | (27.4) |
Change in fair value of derivatives | 19.6 | (84.9) | (80.5) | (35.9) | (65.1) |
Interest Expense, Debt | (42.9) | (9.1) | (43.7) | (14.3) | (33.9) |
Net realized and unrealized foreign exchange gains | (13.7) | 75.2 | 15.9 | 40.0 | (13.8) |
Other income |  |  | 8.2 | 14.7 | 49.8 |
Other expenses |  |  | 20.1 | 10.8 | 10.8 |
Income (loss) from operations before income taxes | 255.1 | 53.1 | (27.0) | 35.1 | (38.0) |
Income Tax Expense (Benefit) | (36.2) | (4.7) | 78.1 | (5.3) | (18.4) |
Net income/(loss) | 218.9 | 48.4 | 51.1 | 29.8 | (56.4) |
Losses and loss adjustment expenses | 7,740.9 | 7,511.8 | 7,710.9 | 7,611.8 | 7,165.3 | $ 6,951.8
Liability for Unpaid Claims and Claims Adjustment Expense, Net, Total | $ 3,082.9 | $ 2,505.3 | $ 2,813.2 | $ 4,313.7 | $ 3,970.1 | $ 4,632.0
Ratios |  |  |  |  |  |
Loss ratio | 55.70% | 57.80% | 62.50% | 70.20% | 72.80% |
Acquisition cost ratio | 15.00% | 16.30% | 16.10% | 17.20% | 18.40% |
General and administrative expense ratio | 13.10% | 14.10% | 14.40% | 13.80% | 12.20% |
Expense ratio | 28.10% | 30.40% | 30.50% | 31.00% | 30.60% |
Combined ratio | 83.80% | 88.20% | 93.00% | 101.20% | 103.40% |
Non-operating expenses related to fixed income writeoff |  |  | $ 32.7 |  |  |
Non-operating expenses related to severance, retention awards and other non-recurring costs |  |  | 10.0 |  | $ 18.2 |
Non-operating expenses related to impairment charges on lease assets |  |  | 6.7 | $ 0.4 | 12.9 |
Non-operating expenses related to Merger Agreement |  |  |  | 19.3 |  |
Non-operating expenses related to Effectiveness And Efficiency Program |  |  |  | 0.9 | 1.6 |
Reinsurance |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net written premiums |  |  | 1,426.4 | 1,199.0 | 1,297.7 |
Net earned premiums |  |  | 1,251.8 | 1,118.8 | 1,287.7 |
Losses and loss adjustment expenses | $ 1,441.2 | $ 1,190.4 | 1,360.7 | 2,148.4 | 2,095.7 |
Liability for Unpaid Claims and Claims Adjustment Expense, Net, Total |  |  | $ 1,360.7 | $ 2,148.4 | $ 2,095.7 |
Ratios |  |  |  |  |  |
Loss ratio | 52.00% | 61.40% | 61.50% | 63.00% | 74.40% |
Acquisition cost ratio | 18.50% | 20.70% | 20.20% | 19.80% | 19.10% |
General and administrative expense ratio | 10.20% | 11.60% | 11.40% | 10.80% | 8.60% |
Expense ratio | 28.70% | 32.30% | 31.60% | 30.60% | 27.70% |
Combined ratio | 80.70% | 93.70% | 93.10% | 93.60% | 102.10% |
Insurance |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net written premiums |  |  | $ 1,469.6 | $ 1,388.7 | $ 1,280.1 |
Net earned premiums |  |  | 1,436.9 | 1,291.7 | 1,239.8 |
Losses and loss adjustment expenses | $ 1,641.7 | $ 1,314.9 | 1,452.5 | 2,165.3 | 1,874.4 |
Liability for Unpaid Claims and Claims Adjustment Expense, Net, Total |  |  | $ 1,452.5 | $ 2,165.3 | $ 1,874.4 |
Ratios |  |  |  |  |  |
Loss ratio | 58.70% | 54.90% | 63.30% | 76.50% | 71.10% |
Acquisition cost ratio | 12.20% | 12.70% | 12.50% | 14.90% | 17.70% |
General and administrative expense ratio | 15.50% | 16.10% | 17.00% | 16.40% | 15.90% |
Expense ratio | 27.70% | 28.80% | 29.50% | 31.30% | 33.60% |
Combined ratio | 86.40% | 83.70% | 92.80% | 107.80% | 104.70% |
Operating Segments | Reinsurance |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Gross written premiums | $ 875.7 | $ 1,045.6 | $ 1,807.0 | $ 1,597.0 | $ 1,656.4 |
Net written premiums | 605.0 | 783.7 | 1,426.4 | 1,199.0 | 1,297.7 |
Gross earned premiums |  |  | 1,617.2 | 1,479.2 | 1,612.0 |
Net earned premiums | 572.0 | 600.8 | 1,251.8 | 1,118.8 | 1,287.7 |
Losses and loss adjustment expenses | 297.2 | 369.0 | 770.3 | 705.2 | 958.6 |
Acquisition costs | 105.7 | 124.1 | 252.4 | 221.6 | 246.0 |
General and administrative expenses | 58.4 | 69.7 | 142.5 | 121.3 | 110.8 |
Underwriting income (loss) | 110.7 | 38.0 | 86.6 | 70.7 | (27.7) |
Operating Segments | Insurance |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Gross written premiums | 1,249.5 | 1,305.7 | 2,531.7 | 2,341.4 | 2,042.1 |
Net written premiums | 745.5 | 722.4 | 1,469.6 | 1,388.7 | 1,280.1 |
Gross earned premiums |  |  | 2,370.8 | 2,139.1 | 2,026.4 |
Net earned premiums | 715.4 | 726.4 | 1,436.9 | 1,291.7 | 1,239.8 |
Losses and loss adjustment expenses | 419.9 | 398.7 | 909.7 | 988.1 | 882.2 |
Acquisition costs | 87.2 | 92.4 | 179.4 | 192.5 | 219.7 |
General and administrative expenses | 110.6 | 116.8 | 244.0 | 211.8 | 197.2 |
Underwriting income (loss) | $ 97.7 | $ 118.5 | $ 103.8 | $ (100.7) | $ (59.3) |

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