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Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Numerator    
Net Income Available to Common Shareholders $ 474.8 $ 344.3
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic 0.8 0.3
Net Income Available to Common Shareholders - Basic Excluding Participating Securities 474.0 344.0
Net Income Available to Common Shareholders - Diluted $ 474.0 $ 344.0
Denominator    
Basic Average Common Shares Outstanding 470.4 447.9
Dilutive potential common shares    
Shares contingently issuable under employee stock plans 1.4 0.9
Shares restricted under stock plans 0.7 0.4
ATM forward sale agreements 0.0 0.2
Diluted Average Common Shares 472.5 449.4
Basic Earnings Per Share $ 1.01 $ 0.77
Diluted Earnings Per Share $ 1.00 $ 0.77