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Reserves for Losses and Adjustment Expenses Short-duration Contracts - Historical Claims Duration (Details) | Dec. 31, 2020
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Insurance |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year One | 16.30%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Two | 26.70%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Three | 16.10%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Four | 12.60%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Five | 8.40%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Six | 6.90%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Seven | 4.60%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Eight | 2.00%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Nine | 2.00%
Reinsurance |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year One | 18.00%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Two | 31.60%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Three | 15.60%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Four | 9.50%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Five | 8.60%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Six | 5.30%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Seven | 4.00%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Eight | 2.50%
Average Annual Percentage Payout of Incurred Claims, Net of Reinsurance, Year Nine | 3.80%

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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 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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