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INCOME TAXES (Schedule of Components of Income Tax Expense) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current:      
Federal $ 113.9 $ 64.5 $ 46.3
State 20.8 9.8 8.0
Total Current Income Tax Expense 134.7 74.3 54.3
Deferred:      
Federal 24.8 9.2 5.5
State 5.8 0.2 (0.3)
Total Deferred Income Tax Expense 30.6 9.4 5.2
Total Income Tax Expense $ 165.3 $ 83.7 $ 59.5