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v3.23.1

Fair Value of Financial Instruments - Rollforward of Instruments Measured on Recurring Basis (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Financial Assets |  |
Beginning balance | $ 425.3 | $ 371.4
Transfers into Level 3 | 6.3 | 72.2
Transfers out of Level 3 | 0.0 | (8.0)
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | (1.0)
Net unrealized investment gains (losses) included in OCI | 1.7 | (13.9)
Purchases | 19.2 | 0.0
Issuances | 0.0 | 0.0
Sales | (2.6) | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (3.9) | (49.5)
Ending balance | 446.0 | 371.2
Financial Liabilities |  |
Beginning balance | 91.0 | 106.6
Transfers into Level 3 | 0.0 | 0.0
Transfers out of Level 3 | 0.0 | 0.0
Total gains or losses |  |
Net investment (gains) losses included in net income related to financial liabilities | 0.2 | 5.2
Net unrealized investment gains (losses) included in OCI | 0.0 | 0.0
Purchases | 0.0 | 0.0
Issuances | 2.1 | 0.9
Sales | 0.0 | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (3.4) | (3.2)
Ending balance | 89.9 | 99.1
Municipal bonds |  |
Financial Assets |  |
Beginning balance | 54.4 | 60.8
Transfers into Level 3 | 0.0 | 0.0
Transfers out of Level 3 | 0.0 | (3.2)
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | 0.0
Net unrealized investment gains (losses) included in OCI | 1.2 | (3.4)
Purchases | 0.0 | 0.0
Issuances | 0.0 | 0.0
Sales | 0.0 | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (0.2) | (0.1)
Ending balance | 55.4 | 54.1
Corporate bonds |  |
Financial Assets |  |
Beginning balance | 261.3 | 210.3
Transfers into Level 3 | 5.9 | 67.5
Transfers out of Level 3 | 0.0 | 0.0
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | 0.0
Net unrealized investment gains (losses) included in OCI | 0.9 | (6.4)
Purchases | 19.0 | 0.0
Issuances | 0.0 | 0.0
Sales | (2.6) | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (0.5) | (45.4)
Ending balance | 284.0 | 226.0
Mortgage Backed and Other Asset- Backed Securities |  |
Financial Assets |  |
Beginning balance | 107.6 | 98.9
Transfers into Level 3 | 0.4 | 4.7
Transfers out of Level 3 | 0.0 | (4.8)
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | (0.9)
Net unrealized investment gains (losses) included in OCI | (0.4) | (4.1)
Purchases | 0.2 | 0.0
Issuances | 0.0 | 0.0
Sales | 0.0 | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (3.2) | (4.0)
Ending balance | 104.6 | 89.8
Total Fixed Maturity Securities |  |
Financial Assets |  |
Beginning balance | 423.3 | 370.0
Transfers into Level 3 | 6.3 | 72.2
Transfers out of Level 3 | 0.0 | (8.0)
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | (0.9)
Net unrealized investment gains (losses) included in OCI | 1.7 | (13.9)
Purchases | 19.2 | 0.0
Issuances | 0.0 | 0.0
Sales | (2.6) | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | (3.9) | (49.5)
Ending balance | 444.0 | 369.9
Equity securities |  |
Financial Assets |  |
Beginning balance | 2.0 | 1.4
Transfers into Level 3 | 0.0 | 0.0
Transfers out of Level 3 | 0.0 | 0.0
Total gains or losses |  |
Net investment losses included in net income related to financial assets | 0.0 | (0.1)
Net unrealized investment gains (losses) included in OCI | 0.0 | 0.0
Purchases | 0.0 | 0.0
Issuances | 0.0 | 0.0
Sales | 0.0 | 0.0
Settlements | 0.0 | 0.0
Paydowns, maturities and distributions | 0.0 | 0.0
Ending balance | $ 2.0 | $ 1.3

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