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Loss and Loss Adjustment Expense Reserves - Average Annual Percentage Payout of Incurred Losses and Allocated LAE by Age, Net of Reinsurance (Details) | Dec. 31, 2021
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Property and Accident & Health |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1 | 31.50%
2 | 33.40%
3 | 19.20%
4 | 5.70%
5 | 1.20%
6 | 1.40%
7 | 0.80%
8 | 0.30%
9 | 0.00%
10 | 0.10%
Marine & Energy |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1 | 19.80%
2 | 37.70%
3 | 20.20%
4 | 5.70%
5 | 4.30%
6 | 7.20%
7 | 0.40%
8 | 0.10%
9 | 0.40%
10 | 0.20%
Specialty |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1 | 34.00%
2 | 33.80%
3 | 7.30%
4 | 0.50%
5 | 4.60%
6 | 4.40%
7 | 4.60%
8 | 3.10%
9 | 3.50%
10 | 1.00%
Casualty - Active |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1 | 9.10%
2 | 14.70%
3 | 18.50%
4 | 14.20%
5 | 9.60%
6 | 10.70%
7 | 3.90%
8 | 3.10%
9 | 1.00%
10 | 3.10%
Casualty - Runoff |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1 | 9.40%
2 | 15.30%
3 | 17.00%
4 | 15.90%
5 | 9.70%
6 | 8.10%
7 | 7.00%
8 | 3.60%
9 | 2.50%
10 | 1.70%

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- Definition Percentage of average annual payout, after reinsurance, in the eighth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4G -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the fifth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4G -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the fourth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4G -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the ninth year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4G -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the first year after a claim is incurred, beginning with the earliest accident year disclosed for short-duration insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 4G -URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671329-158438 + Details
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