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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Statement of Other Comprehensive Income [Abstract]    
Net income $ 725.5 $ 622.6
Derivatives accounted for as cash flow hedges    
Reclassification of realized derivative gains to net income, net of tax (0.1) (0.1)
Comprehensive income 725.4 622.5
Preferred stock dividends of subsidiary 0.3 0.3
Comprehensive income attributed to noncontrolling interests (1.0) 0.0
Comprehensive income attributed to common shareholders $ 724.1 $ 622.2