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Retirement and Post-Retirement Benefit Plans - Schedule of Components of Pension and Post-Retirement Benefit (Credit) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 3 4 7 8
Expected return on plan assets (3) (4) (7) (8)
Amortization and deferrals:        
Actuarial loss (gain) (5) (4) (9) (8)
Prior service cost (credit) (1) (2) (3) (5)
Net periodic benefit (credit) cost (6) (6) (12) (13)
Settlement loss 0 0 0 0
Total periodic benefit (credit) cost (6) (6) (12) (13)
U.S. | Defined Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 0 0 0 0
Interest cost 53 57 106 114
Expected return on plan assets (62) (62) (121) (123)
Amortization and deferrals:        
Actuarial loss (gain) 8 7 15 14
Prior service cost (credit) 0 0 0 0
Net periodic benefit (credit) cost (1) 2 0 5
Settlement loss 0 0 0 0
Total periodic benefit (credit) cost (1) 2 0 5
Non-U.S. | Defined Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 10 9 19 18
Interest cost 10 11 20 23
Expected return on plan assets (13) (13) (27) (26)
Amortization and deferrals:        
Actuarial loss (gain) 2 0 4 0
Prior service cost (credit) 1 1 3 3
Net periodic benefit (credit) cost 10 8 19 18
Settlement loss 1 1 1 1
Total periodic benefit (credit) cost $ 11 $ 9 $ 20 $ 19