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v3.20.4

Summary of Significant Accounting Policies (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Summary of Significant Accounting Policies |  |
Cash and cash equivalents | The following represents the Company’s cash, cash equivalents and restricted cash as of September 30, 2020 and December 31, 2019 ($ in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of
​ | ​ | September 30, | ​ | December 31,
​ |  | 2020 |  | 2019
Cash and cash equivalents | ​ | $ | 575.4 | ​ | $ | 270.0
Restricted cash | ​ |  | 0.3 | ​ |  | 0.3
Total cash, cash equivalents and restricted cash | ​ | $ | 575.7 | ​ | $ | 270.3
| The following represents the Company’s cash, cash equivalents and restricted cash as of December 31, 2018 and 2019 ($ in millions). ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2018 |  | 2019
Cash and cash equivalents | ​ | $ | 102.2 | ​ | $ | 270.0
Restricted cash | ​ |  | 0.2 | ​ |  | 0.3
Total cash, cash equivalents and restricted cash | ​ | $ | 102.4 | ​ | $ | 270.3
Restricted cash | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of
​ | ​ | September 30, | ​ | December 31,
​ |  | 2020 |  | 2019
Cash and cash equivalents | ​ | $ | 575.4 | ​ | $ | 270.0
Restricted cash | ​ |  | 0.3 | ​ |  | 0.3
Total cash, cash equivalents and restricted cash | ​ | $ | 575.7 | ​ | $ | 270.3
| ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2018 |  | 2019
Cash and cash equivalents | ​ | $ | 102.2 | ​ | $ | 270.0
Restricted cash | ​ |  | 0.2 | ​ |  | 0.3
Total cash, cash equivalents and restricted cash | ​ | $ | 102.4 | ​ | $ | 270.3

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- Definition Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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