v3.22.2.2
Revision of Prior Period Financial Statements - Revised Consolidated Statements of Operations (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Policyholder benefits $ 670.5 $ 617.4 $ 1,760.5 $ 1,684.2
Underwriting, general and administrative expenses   818.4   2,306.7
Total benefits, losses and expenses 2,539.3 2,449.6 7,286.6 7,000.0
Income from continuing operations before income tax expense 8.5 188.2 253.6 612.7
Income tax expense 1.2 37.2 45.1 133.8
Net income from continuing operations 7.3 151.0 208.5 478.9
Net income 7.3 879.8 208.5 1,240.9
Net Income Attributable to Stockholders 7.3 879.8 208.5 1,240.9
Net income attributable to common stockholders 7.3 879.8 208.5 1,236.2
Net income attributable to common stockholders $ 7.3 $ 879.8 $ 208.5 $ 1,236.2
Basic earnings per share from continuing operations (in dollars per share) $ 0.14 $ 2.56 $ 3.81 $ 7.94
Basic earnings per share attributable to common stockholders (in dollars per share) 0.14 14.88 3.81 20.68
Diluted earnings per share from continuing operations (in dollars per share) 0.14 2.54 3.78 7.87
Diluted earnings per share attributable to common stockholders (in dollars per share) $ 0.14 $ 14.79 $ 3.78 $ 20.39
As Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Policyholder benefits   $ 614.2   $ 1,681.2
Underwriting, general and administrative expenses   818.3   2,301.2
Total benefits, losses and expenses   2,446.3   6,991.5
Income from continuing operations before income tax expense   191.5   621.2
Income tax expense   37.9   134.4
Net income from continuing operations   153.6   486.8
Net income   882.4   1,248.8
Net Income Attributable to Stockholders   882.4   1,248.8
Net income attributable to common stockholders   882.4   1,244.1
Net income attributable to common stockholders   $ 882.4   $ 1,244.1
Basic earnings per share from continuing operations (in dollars per share)   $ 2.60   $ 8.07
Basic earnings per share attributable to common stockholders (in dollars per share)   14.92   20.81
Diluted earnings per share from continuing operations (in dollars per share)   2.58   8.00
Diluted earnings per share attributable to common stockholders (in dollars per share)   $ 14.83   $ 20.52
Adjustment        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Policyholder benefits   $ 3.2   $ 3.0
Underwriting, general and administrative expenses   0.1   5.5
Total benefits, losses and expenses   3.3   8.5
Income from continuing operations before income tax expense   (3.3)   (8.5)
Income tax expense   (0.7)   (0.6)
Net income from continuing operations   (2.6)   (7.9)
Net income   (2.6)   (7.9)
Net Income Attributable to Stockholders   (2.6)   (7.9)
Net income attributable to common stockholders   (2.6)   (7.9)
Net income attributable to common stockholders   $ (2.6)   $ (7.9)
Basic earnings per share from continuing operations (in dollars per share)   $ (0.04)   $ (0.13)
Basic earnings per share attributable to common stockholders (in dollars per share)   (0.04)   (0.13)
Diluted earnings per share from continuing operations (in dollars per share)   (0.04)   (0.13)
Diluted earnings per share attributable to common stockholders (in dollars per share)   $ (0.04)   $ (0.13)