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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Statement of Comprehensive Income [Abstract]    
Net income $ 15.1 $ 44.5
Other comprehensive income (loss), net of tax:    
Unrealized gain (loss) on cash flow hedges 6.9 (3.4)
Realized gain on settlement of cash flow hedges (6.7) (5.4)
Amortization of deferred losses related to the dedesignated Interest Rate Swap 0.1 0.1
Other comprehensive income (loss) before tax 0.3 (8.7)
Tax effect (0.1) 2.2
Other comprehensive income (loss), net of tax 0.2 (6.5)
Comprehensive income $ 15.3 $ 38.0