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v3.20.4

Commitment and Contingent Liabilities (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Commitment and Contingent Liabilities |  |
Aggregate minimum rental commitments under non-cancelable leases | Aggregate minimum rental commitments under non-cancelable leases at September 30, 2020 are as follows ($ in millions): ​
​ | ​ | ​ | ​
2020 (remaining three months) |  | $ | 0.9
2021 | ​ |  | 3.7
2022 | ​ |  | 3.1
2023 | ​ |  | 0.4
2024 | ​ |  | 0.4
​ | ​ | $ | 8.5
| Aggregate minimum rental commitments under non-cancelable operating leases at December 31, 2019 are as follows ($ in millions): ​
​ | ​ | ​ | ​
2020 |  | $ | 3.5
2021 | ​ |  | 3.3
2022 | ​ |  | 2.9
2023 | ​ |  | 0.3
2024 and thereafter | ​ |  | 0.3
​ | ​ | $ | 10.3

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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