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Statutory Information - Summary of statutory capital, surplus and net income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Bermuda |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | $ 19,546,128 | $ 17,528,510 |
Required statutory capital and surplus | [1] | 6,449,878 | 5,661,301 |
Statutory net income (loss) |  | 1,729,925 | 2,370,746 | $ 1,579,889
Ireland |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | 968,443 | 958,200 |
Required statutory capital and surplus | [1] | 815,194 | 794,933 |
Statutory net income (loss) |  | (52,757) | 25,191 | 18,397
United States |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | 6,194,954 | 5,600,652 |
Required statutory capital and surplus | [1] | 1,748,543 | 1,717,646 |
Statutory net income (loss) |  | 219,524 | 345,790 | 143,271
United Kingdom |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | 1,018,092 | 902,002 |
Required statutory capital and surplus | [1] | 543,104 | 563,164 |
Statutory net income (loss) |  | 56,818 | 35,286 | 4,078
Canada |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | 68,637 | 70,063 |
Required statutory capital and surplus | [1] | 47,825 | 42,513 |
Statutory net income (loss) |  | 9,215 | 6,985 | (1,049)
Australia |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |
Actual statutory capital and surplus | [1] | 284,998 | 283,693 |
Required statutory capital and surplus | [1] | 175,885 | 214,022 |
Statutory net income (loss) |  | $ 38,538 | $ 11,874 | $ (8,601)
[1] | Such amounts include ownership interests in affiliated insurance and reinsurance subsidiaries.

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- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 + Details
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- Definition Amount of statutory capital required to be maintained as of the balance sheet date under prescribed or permitted statutory accounting practices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 + Details
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