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Changes in Accumulated Other Comprehensive Loss by Component - Summary of Reclassifications Out of AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Gain (loss) on cash flow hedges:    
Interest expense $ (139.3) $ (126.7)
Total before tax 598.9 522.1
Tax provision (145.2) (138.2)
Net income 453.7 383.9
Amount Reclassified from Accumulated Other Comprehensive Income    
Gain (loss) on cash flow hedges:    
Net income 2.1 2.6
Amount Reclassified from Accumulated Other Comprehensive Income | Cash Flow Hedges    
Gain (loss) on cash flow hedges:    
Total before tax 2.8 3.5
Tax provision (0.7) (0.9)
Amount Reclassified from Accumulated Other Comprehensive Income | Cash Flow Hedges | Terminated interest rate locks    
Gain (loss) on cash flow hedges:    
Interest expense (1.2) (1.4)
Amount Reclassified from Accumulated Other Comprehensive Income | Cash Flow Hedges | 2022 interest rate swap    
Gain (loss) on cash flow hedges:    
Interest expense $ 4.0 $ 4.9