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Investments - Continuous Unrealized Loss (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
U.S. Government and Government Agencies and Authorities |  |
Fair Value |  |
Less Than 12 Months | $ 21.0 | $ 10.5
12 Months or Longer | 0.1 | 0.0
Total | 21.1 | 10.5
Unrealized Losses |  |
Less Than 12 Months | (1.3) | (0.1)
12 Months or Longer | 0.0 | 0.0
Total | (1.3) | (0.1)
States and Political Subdivisions |  |
Fair Value |  |
Less Than 12 Months | 335.7 | 23.3
12 Months or Longer | 0.7 | 0.0
Total | 336.4 | 23.3
Unrealized Losses |  |
Less Than 12 Months | (11.6) | (0.2)
12 Months or Longer | 0.0 | 0.0
Total | (11.6) | (0.2)
Foreign Governments |  |
Fair Value |  |
Less Than 12 Months | 0.2 | 0.5
12 Months or Longer | 2.2 | 2.6
Total | 2.4 | 3.1
Unrealized Losses |  |
Less Than 12 Months | (0.1) | (0.1)
12 Months or Longer | (1.1) | (1.0)
Total | (1.2) | (1.1)
Bonds and Notes |  |
Fair Value |  |
Less Than 12 Months | 559.1 | 132.9
12 Months or Longer | 59.6 | 46.1
Total | 618.7 | 179.0
Unrealized Losses |  |
Less Than 12 Months | (25.8) | (7.5)
12 Months or Longer | (4.6) | (3.1)
Total | (30.4) | (10.6)
Redeemable Preferred Stocks |  |
Fair Value |  |
Less Than 12 Months | 5.4 |
12 Months or Longer | 0.0 |
Total | 5.4 |
Unrealized Losses |  |
Less Than 12 Months | (0.1) |
12 Months or Longer | 0.0 |
Total | (0.1) |
Collateralized Loan Obligations |  |
Fair Value |  |
Less Than 12 Months | 42.1 | 145.2
12 Months or Longer | 320.8 | 371.4
Total | 362.9 | 516.6
Unrealized Losses |  |
Less Than 12 Months | (0.2) | (3.8)
12 Months or Longer | (10.3) | (15.9)
Total | (10.5) | (19.7)
Other Mortgage- and Asset-backed |  |
Fair Value |  |
Less Than 12 Months | 17.3 | 6.3
12 Months or Longer | 0.1 | 0.0
Total | 17.4 | 6.3
Unrealized Losses |  |
Less Than 12 Months | (0.1) | 0.0
12 Months or Longer | 0.0 | 0.0
Total | (0.1) | 0.0
Investments in Fixed Maturities |  |
Fair Value |  |
Less Than 12 Months | 980.8 | 318.7
12 Months or Longer | 383.5 | 420.1
Total | 1,364.3 | 738.8
Unrealized Losses |  |
Less Than 12 Months | (39.2) | (11.7)
12 Months or Longer | (16.0) | (20.0)
Total | (55.2) | (31.7)
Investments in Fixed Maturities | Non-investment-grade |  |
Unrealized Losses |  |
Total | $ (15.4) | $ (23.7)

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