Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Details)

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Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Current income taxes:              
Federal         $ 1.7    
State         3.7    
Total current         5.4    
Deferred income taxes:              
Federal         3.6    
State         0.1    
Total deferred         3.7    
Income tax expense $ (3.3) $ 7.9 $ 3.9 $ 0.6 $ 9.1 $ (0.2) $ 0.5