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Schedule 4 - Reinsurance Schedule (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Life Insurance in Force |  |  |  |  |  |  |  |  |  |  |
Gross Amount | $ 19,479.9 |  |  |  | $ 19,435.1 |  |  |  | $ 19,479.9 | $ 19,435.1 | $ 19,208.7
Ceded to Other Companies | 411.6 |  |  |  | 436.4 |  |  |  | 411.6 | 436.4 | 455.2
Assumed from Other Companies | 162.8 |  |  |  | 172.7 |  |  |  | 162.8 | 172.7 | 184.0
Net Amount | $ 19,231.1 |  |  |  | $ 19,171.4 |  |  |  | $ 19,231.1 | $ 19,171.4 | $ 18,937.5
Percentage of Amount Assumed to Net | 0.80% |  |  |  | 0.90% |  |  |  | 0.80% | 0.90% | 1.00%
Premiums |  |  |  |  |  |  |  |  |  |  |
Gross Amount |  |  |  |  |  |  |  |  | $ 4,407.5 | $ 3,330.8 | $ 2,295.3
Ceded to Other Companies |  |  |  |  |  |  |  |  | 27.4 | 31.6 | 18.2
Assumed from Other Companies |  |  |  |  |  |  |  |  | 92.3 | 85.2 | 72.9
Net Amount | $ 1,145.8 | $ 1,135.2 | $ 1,116.6 | $ 1,074.8 | $ 1,063.6 | $ 1,052.9 | $ 658.1 | $ 609.8 | $ 4,472.4 | $ 3,384.4 | $ 2,350.0
Percentage of Amount Assumed to Net |  |  |  |  |  |  |  |  | 2.10% | 2.50% | 3.10%
Life Insurance |  |  |  |  |  |  |  |  |  |  |
Premiums |  |  |  |  |  |  |  |  |  |  |
Gross Amount |  |  |  |  |  |  |  |  | $ 383.6 | $ 378.2 | $ 366.8
Ceded to Other Companies |  |  |  |  |  |  |  |  | 1.2 | 1.2 | 1.4
Assumed from Other Companies |  |  |  |  |  |  |  |  | 0.9 | 1.0 | 1.1
Net Amount |  |  |  |  |  |  |  |  | $ 383.3 | $ 378.0 | $ 366.5
Percentage of Amount Assumed to Net |  |  |  |  |  |  |  |  | 0.20% | 0.30% | 0.30%
Accident and Health Insurance |  |  |  |  |  |  |  |  |  |  |
Premiums |  |  |  |  |  |  |  |  |  |  |
Gross Amount |  |  |  |  |  |  |  |  | $ 188.5 | $ 174.3 | $ 171.0
Ceded to Other Companies |  |  |  |  |  |  |  |  | 1.7 | 1.7 | 1.5
Assumed from Other Companies |  |  |  |  |  |  |  |  | 5.3 | 5.3 | 5.4
Net Amount |  |  |  |  |  |  |  |  | $ 192.1 | $ 177.9 | $ 174.9
Percentage of Amount Assumed to Net |  |  |  |  |  |  |  |  | 2.80% | 3.00% | 3.10%
Property and Liability Insurance |  |  |  |  |  |  |  |  |  |  |
Premiums |  |  |  |  |  |  |  |  |  |  |
Gross Amount |  |  |  |  |  |  |  |  | $ 3,835.4 | $ 2,778.3 | $ 1,757.5
Ceded to Other Companies |  |  |  |  |  |  |  |  | 24.5 | 28.7 | 15.3
Assumed from Other Companies |  |  |  |  |  |  |  |  | 86.1 | 78.9 | 66.4
Net Amount |  |  |  |  |  |  |  |  | $ 3,897.0 | $ 2,828.5 | $ 1,808.6
Percentage of Amount Assumed to Net |  |  |  |  |  |  |  |  | 2.20% | 2.80% | 3.70%

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- Definition Percentage of assumed life insurance contract issued and outstanding to life insurance contract issued and outstanding after effect of reinsurance, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph Column F -Subsection 17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17(Column F)) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915 + Details
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