XML 71 R57.htm IDEA: XBRL DOCUMENT v3.20.4
Investments, Continuous Loss Position (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Debt Securities, Available-for-sale [Line Items]      
Investments $ 2,778.4   $ 2,757.2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 82.2   205.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 45.9   0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (0.6)   (2.3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (0.6)   $ 0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 99   199
Debt Securities, number of issues in loss position, 12 months or longer | shares 38   0
Debt Securities [Member]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value $ 82.2   $ 205.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 45.9   0.0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ 0.6   $ 0.0
Number of Issues available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months. | shares 38   0
Available-for-sale Securities, unrealized losses, less than 12 months $ 0.6   $ 2.3
Number of Issues available for sale securities continous unrealized loss position less than twelve months | shares 99   199
Total impairments, value $ 0.0 $ 3.3  
Total impairments, number of securitites | shares   66  
Corporate Debt Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 0.0   $ 9.7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 0.0   $ (0.3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 0   10
Residential Mortgage Backed Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 56.9   $ 47.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 40.0   0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (0.2)   (0.3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (0.5)   $ 0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 29   13
Debt Securities, number of issues in loss position, 12 months or longer | shares 19   0
Commercial Mortgage Backed Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 0.0   $ 5.5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 0.0   $ (0.1)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 0   6
Asset-backed Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 10.1   $ 7.8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ (0.1)   $ (0.3)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 6   6
Other Debt Obligations [Member]      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 15.2   $ 60.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 5.9   0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss (0.3)   (0.5)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss $ (0.1)   $ 0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 64   146
Debt Securities, number of issues in loss position, 12 months or longer | shares 19   0
Collateralized Loan Obligations      
Debt Securities, Available-for-sale [Line Items]      
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months $ 0.0   $ 74.6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss $ 0.0   $ (0.8)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Number of Positions [Abstract]      
Debt Securities, number of issues in loss position, less than 12 months | shares 0   18