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Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2022
Nov. 30, 2020
Statutory Accounting Practices      
Debt instrument, face amount     $ 155.3
Interest rate     5.25%
Paid-in Capital      
Statutory Accounting Practices      
Cash on convertible notes     $ 39.2
Retained Earnings      
Statutory Accounting Practices      
Cash on convertible notes     $ 6.7
ASU 2020-06      
Statutory Accounting Practices      
Diluted earnings per share $ 8.74 $ 42.05  
Decreased by diluted earnings per share $ 0.06 $ 1.05