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Financial Instruments - Derivative Hedging Activities (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]        
Interest expense $ (127.6) $ (105.2) $ (378.8) $ (282.7)
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax:        
(Loss) gain on cash flow hedging relationships 2.3 0.0 7.1 (2.1)
Net swap settlements        
Interest rate swaps:        
Gain (loss) on interest rate swaps   0.4 (2.2) 3.7
Interest Expense | Net swap settlements | Fair Value Hedging        
Interest rate swaps:        
Gain (loss) on interest rate swaps 0.0 0.4 (2.2) 3.7
Interest Expense | Net periodic (loss) earnings | Fair Value Hedging        
Interest rate swaps:        
Gain (loss) on interest rate swaps 0.0 (0.9) (1.1) (2.1)
Interest Expense | Interest rate swap locks | Cash Flow Hedging        
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax:        
(Loss) gain on cash flow hedging relationships (0.9) (1.1) (2.9) (3.2)
Interest Expense | 2022 interest rate swap | Cash Flow Hedging        
Amount of (loss) gain reclassified from accumulated other comprehensive loss into earnings, net of tax:        
(Loss) gain on cash flow hedging relationships 3.2 1.1 10.0 1.1
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax 3.2 1.1 10.0 1.1
Interest Expense | Freestanding Derviatives        
Gain (loss) on free-standing derivative instruments:        
Gain (loss) on change in fair value of free-standing derivative instruments 0.0 (0.8) 1.0 (5.2)
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 $ (0.6) $ 0.5 $ (1.9) $ 2.2