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v3.23.4

Segment Reporting - Summary of the Schedule of the Company's gross written premiums based on the location of the insured risk (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
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums | $ 2,125.2 | $ 2,351.3 | $ 4,338.7 | $ 3,938.4 | $ 3,698.5
Australia/Asia |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 257.5 | 275.8 | 259.7
Europe |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 194.5 | 140.6 | 92.5
United Kingdom |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 485.8 | 393.2 | 369.0
United States & Canada |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 2,715.7 | 2,301.8 | 2,267.5
Worldwide excluding United States |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 24.2 | 31.5 | 23.1
Worldwide including United States |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | 541.7 | 592.2 | 501.2
Other (4) |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gross written premiums |  |  | $ 119.3 | $ 203.3 | $ 185.5

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- Definition Amount of direct and assumed premiums written. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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