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Schedule IV - Reinsurance | 12 Months Ended
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Dec. 31, 2021
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract] |
Schedule IV - Reinsurance | SCHEDULE IV - REINSURANCE For the Twelve Months Ended December 31, 2021, 2020 and 2019 Premiums Written
|  | Direct |  | Assumed |  | Ceded |  | Net Amount
|  | ($ in millions)
2021 |  | $ | 2,341.4 |  |  | $ | 1,597.0 |  |  | $ | (1,350.7) |  |  | $ | 2,587.7 |
2020(1) |  | $ | 2,042.1 |  |  | $ | 1,656.4 |  |  | $ | (1,120.7) |  |  | $ | 2,577.8 |
2019 |  | $ | 1,956.9 |  |  | $ | 1,485.5 |  |  | $ | (1,014.5) |  |  | $ | 2,427.9 |
Premiums Earned
|  | Gross Amount |  | Assumed From Other Companies |  | Ceded to Other Companies |  | Net Amount |  | Percentage of Amount Assumed to Net
|  | ($ in millions, except for percentages)
2021 |  | $ | 2,139.1 |  |  | $ | 1,479.2 |  |  | $ | (1,207.8) |  |  | $ | 2,410.5 |  |  | 61.4 | %
2020(1) |  | $ | 2,026.4 |  |  | $ | 1,612.0 |  |  | $ | (1,110.9) |  |  | $ | 2,527.5 |  |  | 63.8 | %
2019 |  | $ | 1,927.5 |  |  | $ | 1,494.9 |  |  | $ | (1,129.1) |  |  | $ | 2,293.3 |  |  | 65.2 | %
(1) For the period twelve months ended December 31, 2020 net premiums written and net premiums earned have been corrected downward by $5.1 million for immaterial errors. Refer to Note 26 in these consolidated financial statements, “Correction of Immaterial Errors” for further details

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- Definition The entire disclosure for the supplemental schedule of reinsurance information. Reinsurance schedule includes, but is not limited to, the type of insurance, gross amount of premiums, premiums ceded to other entities, premiums assumed from other entities, net amount of premium revenue, and the percentage of the premiums assumed to net premium revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -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) -URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915 + Details
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