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v3.23.2

Fair Value (Available-For-Sale Securities) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Disclosure [Line Items] |  |
Amortized Cost | $ 168.8 | $ 166.7
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | (13.2) | (14.2)
Allowance for Credit Loss | (0.7) | (0.9)
Fair Value | 154.9 | 151.6
U.S. Treasury debt securities |  |
Fair Value Disclosure [Line Items] |  |
Amortized Cost | 70.1 | 67.7
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | (4.2) | (4.5)
Allowance for Credit Loss | 0.0 | 0.0
Fair Value | 65.9 | 63.2
Debt Securities, Available-for-sale, Unrealized Loss Position | 59.9 | 61.0
Corporate/Other debt securities |  |
Fair Value Disclosure [Line Items] |  |
Amortized Cost | 98.7 | 99.0
Gross Unrealized Gains | 0.0 | 0.0
Gross Unrealized Losses | (9.0) | (9.7)
Allowance for Credit Loss | (0.7) | (0.9)
Fair Value | 89.0 | 88.4
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 83.7 | $ 85.5

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