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Investments (Narratives) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2022
Insurance Regulatory Authorites: |  |  |
Assets held by insurance regulators |  | $ 21.4 | $ 27.1
Available for sale securities: |  |  |
Fair value of sold available for sale securites | $ 147.6 | 352.3 |
Available for sale securities, realized gains | 1.1 | 9.5 |
Available for sale securities, gross realized losses | 0.5 | $ 1.4 |
Other-than-temporary impairments | $ 2.2 |  |

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