XML 1059 R45.htm IDEA: XBRL DOCUMENT v3.21.1
Investments - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, Fair Value, and Other-Than-Temporary-Impairment of Fixed Maturity and Equity Securities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost $ 722.0 $ 760.8
Gross Unrealized Gains 241.8 196.3
Gross Unrealized Losses (2.0) (0.4)
Fair Value 961.8 956.7
OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   12.2
U.S. government and government agencies and authorities    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 0.6 0.6
Gross Unrealized Gains 0.1 0.1
Gross Unrealized Losses 0.0 0.0
Fair Value 0.7 0.7
U.S. government and government agencies and authorities | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.0
States, municipalities and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 12.9 13.0
Gross Unrealized Gains 2.6 1.9
Gross Unrealized Losses 0.0 0.0
Fair Value 15.5 14.9
States, municipalities and political subdivisions | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.0
Foreign governments    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 18.4 8.4
Gross Unrealized Gains 6.1 2.4
Gross Unrealized Losses (0.4) 0.0
Fair Value 24.1 10.8
Foreign governments | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.0
Asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 99.0 102.1
Gross Unrealized Gains 1.5 0.7
Gross Unrealized Losses (0.3) (0.4)
Fair Value 100.2 102.4
Asset-backed | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.0
Commercial mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 7.5 5.0
Gross Unrealized Gains 0.5 0.0
Gross Unrealized Losses 0.0 0.0
Fair Value 8.0 5.0
Commercial mortgage-backed | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.0
Residential mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 27.2 31.8
Gross Unrealized Gains 2.9 2.1
Gross Unrealized Losses 0.0 0.0
Fair Value 30.1 33.9
Residential mortgage-backed | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   0.6
U.S. corporate    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 462.8 491.3
Gross Unrealized Gains 189.5 154.8
Gross Unrealized Losses (1.3) 0.0
Fair Value 651.0 646.1
U.S. corporate | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   11.6
Foreign corporate    
Debt Securities, Available-for-sale [Line Items]    
Cost or Amortized Cost 93.6 108.6
Gross Unrealized Gains 38.6 34.3
Gross Unrealized Losses 0.0 0.0
Fair Value $ 132.2 142.9
Foreign corporate | OTTI    
Debt Securities, Available-for-sale [Line Items]    
OTTI in AOCI   $ 0.0