v3.24.0.1
Financial Instruments (Outstanding Costless Collar Hedges) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Derivative [Line Items]      
Interest expense $ (508.2) $ (395.6) $ (314.6)
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax      
Realized gain (loss) on interest rate swap locks 9.3 (1.1) (4.6)
Net swap settlements      
Interest rate swaps:      
(Loss) gain on interest rate swaps 2.2 (2.9) (7.9)
2022 Interest Rate Swap      
Interest rate swaps:      
(Loss) gain on interest rate swaps (1.2) 6.0 5.2
Interest Expense | Net swap settlements | Fair Value Hedging      
Interest rate swaps:      
(Loss) gain on interest rate swaps (2.2) 2.9 7.9
Interest Expense | Net periodic loss | Fair Value Hedging      
Interest rate swaps:      
(Loss) gain on interest rate swaps (1.1) (3.3) (0.1)
Interest Expense | Interest rate swap locks | Cash Flow Hedging      
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax      
Realized gain (loss) on interest rate swap locks (3.8) (4.4) (4.6)
Interest Expense | 2022 Interest Rate Swap | Cash Flow Hedging      
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax      
Realized gain (loss) on interest rate swap locks 13.1 3.3 0.0
Interest Expense | Freestanding Derviatives      
Gain (loss) on free-standing derivative instruments:      
Gain (loss) on change in fair value of free-standing derivative instruments 1.0 (5.0) (4.4)
Interest Expense | Interest Rate Contract      
Gain (loss) on free-standing derivative instruments:      
Net (loss) gain on change in fair value of free-standing derivative instruments $ (1.9) $ 2.1 $ 0.3