v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Numerator:        
Net Income (Loss) Attributable to Parent $ 647.9 $ 810.4 $ 1,242.7 $ 1,655.3
Denominator:        
Denominator for basic earnings per share — weighted average shares 287.9 312.5 290.1 317.0
Effect of dilutive securities:        
Employee stock awards (shares) 1.1 1.5 1.1 1.7
Denominator for diluted earnings per share — adjusted weighted average shares 289.0 314.0 291.2 318.7
Basic net income per common share attributable to Parent (in dollars per share) $ 2.25 $ 2.59 $ 4.28 $ 5.22
Diluted net income per common share attributable to Parent (in dollars per share) $ 2.24 $ 2.58 $ 4.27 $ 5.19