v3.26.1
Weighted Average Shares Outstanding (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Weighted Average Shares Outstanding        
Basic weighted average shares outstanding (in shares) 612.0 659.0 612.0 661.0
Effect of dilutive securities:        
Stock options, unvested restricted stock and unvested performance share awards (in shares) 2.0 2.0 2.0 2.0
Diluted weighted average shares outstanding (in shares) 614.0 661.0 614.0 663.0
Antidilutive Securities        
Stock options and unvested restricted stock (in shares) 0.0 0.1 0.0 0.1