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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2023
Fair Value Disclosures [Abstract] |
Schedule of fair value hierarchy for financial assets and liabilities | The following tables present the Company’s fair value hierarchy for financial assets and liabilities measured as of September 30, 2023 and December 31, 2022 ($ in millions):
|  | September 30, 2023
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | — |  |  | $ | 451.0 |  |  | $ | — |  |  | $ | 451.0 |
U.S. Government obligations |  | — |  |  | 182.0 |  |  | — |  |  | 182.0 |
Asset-backed securities |  | — |  |  | 0.4 |  |  | — |  |  | 0.4 |
Fixed maturities |  | $ | — |  |  | $ | 633.4 |  |  | $ | — |  |  | $ | 633.4 |
Short term investments |  | — |  |  | 73.4 |  |  | — |  |  | 73.4 |
Total |  | $ | — |  |  | $ | 706.8 |  |  | $ | — |  |  | $ | 706.8 |
Financial Liabilities: |  |  |  |  |  |  |  |
Warrant Liability (1) |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
(1) Fair value of Public and Private warrant liability amounted to less than $0.1 million as of September 30, 2023.
|  | December 31, 2022
|  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Financial Assets: |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | — |  |  | $ | 530.2 |  |  | $ | — |  |  | $ | 530.2 |
U.S. Government obligations |  | — |  |  | 117.3 |  |  | — |  |  | 117.3 |
Asset-backed securities |  | — |  |  | 2.8 |  |  | — |  |  | 2.8 |
Fixed maturities |  | $ | — |  |  | $ | 650.3 |  |  | $ | — |  |  | $ | 650.3 |
Short term investments |  | — |  |  | 99.8 |  |  | — |  |  | 99.8 |
Total |  | $ | — |  |  | $ | 750.1 |  |  | $ | — |  |  | $ | 750.1 |
Financial Liabilities: |  |  |  |  |  |  |  |
Warrant Liability |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | 0.3 |
Schedule of warrant liability | The following table below presents the change in fair value of the warrant liability (Public and Private) ($ in millions):
|  | September 30, 2023
Balance as of January 1 |  | $ | 0.3 |
Change in fair value |  | (0.3) |
Balance as of September 30 (1) |  | $ | — |
(1) Fair value of Public and Private warrant liability amounted to less than $0.1 million as of September 30, 2023.

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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