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Reserve for Unpaid Losses and Loss Adjustment Expenses - Average Annual Payout of Incurred Claims by Age, Group (Details) - Group Insurance Policies | Dec. 31, 2018
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Group long-term disability |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1st Year | 7.30%
2nd Year | 24.40%
3rd Year | 15.40%
4th Year | 8.70%
5th Year | 6.30%
6th Year | 5.40%
7th Year | 4.60%
8th Year | 3.90%
Group life and accident, excluding premium waiver |
Short-duration Insurance Contracts, Historical Claims Duration [Line Items] |
1st Year | 79.30%
2nd Year | 19.00%
3rd Year | 0.90%

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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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