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v3.23.1

Investments (Narratives) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |
Assets held by insurance regulators | $ 23.4 | $ 27.1 |
Fair value of sold available-for-sale securities | 196.2 | 352.3 | $ 523.9
Available for sale securities, realized gain | 0.9 | 9.5 | 9.6
Available for sale securities, realized loss | 0.3 | $ 1.4 | $ 2.1
Other-than-temporary impairments | 2.0 |  |
Available for sale investments, unrealized loss position |  |  |
Available for sale investments, fair value, recovery amount | $ 0.5 |  |
Mortgages [Member] | Minimum [Member] |  |  |
Real Estate [Abstract] |  |  |
Mortgage loan interest rate | 3.50% |  |
Mortgages [Member] | Maximum [Member] |  |  |
Real Estate [Abstract] |  |  |
Mortgage loan interest rate | 6.50% |  |

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