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RESERVE FOR LOSSES AND LOSS EXPENSES - Average annual percentage payout of incurred claims by age, net of reinsurance (Details) | Dec. 31, 2018
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Insurance | Property and other |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 34.50%
Year 2 | 40.20%
Year 3 | 13.20%
Year 4 | 5.80%
Year 5 | 2.00%
Year 6 | 0.80%
Year 7 | 0.70%
Year 8 | 0.20%
Year 9 | 0.30%
Year 10 | 0.00%
Insurance | Marine |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 21.90%
Year 2 | 27.30%
Year 3 | 20.80%
Year 4 | 7.20%
Year 5 | 6.20%
Year 6 | 4.10%
Year 7 | 4.00%
Year 8 | (1.50%)
Year 9 | 0.50%
Year 10 | 2.60%
Insurance | Aviation |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 22.30%
Year 2 | 24.80%
Year 3 | 20.00%
Year 4 | 15.50%
Year 5 | 8.60%
Year 6 | 3.10%
Year 7 | 2.30%
Year 8 | (0.10%)
Year 9 | 1.00%
Year 10 | (0.40%)
Insurance | Credit and political risk |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 21.70%
Year 2 | 38.90%
Year 3 | 1.60%
Year 4 | 3.10%
Year 5 | 9.90%
Year 6 | 3.30%
Year 7 | 0.40%
Year 8 | 0.00%
Year 9 | (0.50%)
Year 10 | (0.10%)
Insurance | Professional lines |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 4.10%
Year 2 | 11.80%
Year 3 | 15.70%
Year 4 | 13.40%
Year 5 | 11.60%
Year 6 | 9.10%
Year 7 | 8.20%
Year 8 | 7.70%
Year 9 | 8.60%
Year 10 | 3.20%
Insurance | Liability |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 2.80%
Year 2 | 11.80%
Year 3 | 12.90%
Year 4 | 19.40%
Year 5 | 10.00%
Year 6 | 8.10%
Year 7 | 5.00%
Year 8 | 19.00%
Year 9 | 1.30%
Year 10 | 1.30%
Reinsurance | Property and other |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 22.20%
Year 2 | 39.90%
Year 3 | 19.10%
Year 4 | 6.50%
Year 5 | 3.80%
Year 6 | 2.90%
Year 7 | 1.90%
Year 8 | 0.70%
Year 9 | 0.00%
Year 10 | (0.90%)
Reinsurance | Credit and surety |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 29.90%
Year 2 | 30.00%
Year 3 | 12.60%
Year 4 | 5.50%
Year 5 | 4.30%
Year 6 | 1.90%
Year 7 | 1.30%
Year 8 | 0.90%
Year 9 | 0.50%
Year 10 | (0.40%)
Reinsurance | Professional lines |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 0.90%
Year 2 | 5.90%
Year 3 | 12.10%
Year 4 | 14.40%
Year 5 | 13.30%
Year 6 | 12.70%
Year 7 | 10.50%
Year 8 | 5.20%
Year 9 | 3.80%
Year 10 | 3.90%
Reinsurance | Motor |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 19.50%
Year 2 | 14.10%
Year 3 | 8.60%
Year 4 | 5.80%
Year 5 | 4.70%
Year 6 | 4.90%
Year 7 | 3.00%
Year 8 | 2.60%
Year 9 | 2.80%
Year 10 | 3.20%
Reinsurance | Liability |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
Year 1 | 3.40%
Year 2 | 9.20%
Year 3 | 13.10%
Year 4 | 12.00%
Year 5 | 11.20%
Year 6 | 11.60%
Year 7 | 8.10%
Year 8 | 5.20%
Year 9 | 4.50%
Year 10 | 2.00%

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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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- 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=99384497&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=99384497&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=99384497&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=99384497&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=99384497&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the seventh 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=99384497&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the sixth 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=99384497&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the tenth 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=99384497&loc=SL65671329-158438 + Details
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- Definition Percentage of average annual payout, after reinsurance, in the third 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=99384497&loc=SL65671329-158438 + Details
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