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3. Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Price Change Debt Security | 5.00% |
Tolerable variance Level 2 debt security pricing | 1.00% |
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more | $ 3.7 | $ 19.9
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months | 161.2 | 91.9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0.1 | 0.1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 164.9 | 111.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 2.4 | 0.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 2.3 | 0.3
Corporate Debt Securities [Member] |  |
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more | 0.0 | 2.1
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months | 106.0 | 46.5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0.0 | 0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 106.0 | 48.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 1.7 | 0.1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1.7 | 0.1
US Government Sponsored Agencies [Member] |  |
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more |  | 10.8
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months |  | 27.5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | 0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax |  | 38.3
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | 0.2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 0.2
Asset-backed Securities [Member] |  |
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more | 3.7 | 7.0
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months | 55.2 | 17.9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0.1 | 0.1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 58.9 | 24.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | 0.7 | 0.1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0.6 | $ 0.0
Fair Value, Recurring [Member] | Debt Securities [Member] |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | $ 2.4 |

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