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Share-Based Compensation (Summary of Stock Option Activity) (Details) - Employee Stock Options [Member]
shares in Millions
 12 Months Ended
Oct. 31, 2025
shares
$ / shares
Oct. 31, 2024
shares
$ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number outstanding, beginning of year 14.7 14.1
Granted 2.0 2.6
Exercised (2.3) (1.7)
Forfeited/expired (0.2) (0.3)
Number outstanding, end of year 14.2 14.7
Exercisable, end of year 5.2 5.4
Number outstanding, beginning of year, Weighted average exercise price | $ / shares $ 79.17 $ 76.58
Granted, Weighted average exercise price | $ / shares 75.76 81.78
Exercised, Weighted average exercise price | $ / shares 65.99 60.07
Forfeited/expired, Weighted average exercise price | $ / shares 85.29 85.36
Number outstanding, end of year, Weighted average exercise price | $ / shares 80.65 79.17
Exercisable, end of year, Weighted average exercise price | $ / shares $ 70.94 $ 68.51
Number of shares, Available for grant 3.4 5.1