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Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Jul. 31, 2025
Oct. 31, 2024
Assets:    
Cash Equivalents: $ 2,171 $ 2,344
Derivative Instruments: 134 229
Liabilities:    
Derivative Instruments: 377 182
Fair Value Measured on a Recurring Basis    
Assets:    
Total assets 2,439 2,760
Liabilities:    
Total liabilities 377 182
Fair Value Measured on a Recurring Basis | Time deposits    
Assets:    
Cash Equivalents: 1,773 1,012
Fair Value Measured on a Recurring Basis | Government debt    
Assets:    
Cash Equivalents: 398 1,332
Fair Value Measured on a Recurring Basis | Financial institution instruments    
Assets:    
Available-for-Sale Investments: 3 3
Fair Value Measured on a Recurring Basis | Marketable securities and mutual funds    
Assets:    
Available-for-Sale Investments: 131 184
Liabilities:    
Debt securities, restricted 67 78
Fair Value Measured on a Recurring Basis | Interest rate contracts    
Assets:    
Derivative Instruments: 0 4
Liabilities:    
Derivative Instruments: 4 22
Fair Value Measured on a Recurring Basis | Foreign currency contracts    
Assets:    
Derivative Instruments: 133 225
Liabilities:    
Derivative Instruments: 372 158
Fair Value Measured on a Recurring Basis | Other derivatives    
Assets:    
Derivative Instruments: 1 0
Liabilities:    
Derivative Instruments: 1 2
Fair Value Measured on a Recurring Basis | Level 1    
Assets:    
Total assets 406 1,386
Liabilities:    
Total liabilities 0 0
Fair Value Measured on a Recurring Basis | Level 1 | Time deposits    
Assets:    
Cash Equivalents: 0 0
Fair Value Measured on a Recurring Basis | Level 1 | Government debt    
Assets:    
Cash Equivalents: 398 1,332
Fair Value Measured on a Recurring Basis | Level 1 | Financial institution instruments    
Assets:    
Available-for-Sale Investments: 0 0
Fair Value Measured on a Recurring Basis | Level 1 | Marketable securities and mutual funds    
Assets:    
Available-for-Sale Investments: 8 54
Fair Value Measured on a Recurring Basis | Level 1 | Interest rate contracts    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: 0 0
Fair Value Measured on a Recurring Basis | Level 1 | Foreign currency contracts    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: 0 0
Fair Value Measured on a Recurring Basis | Level 1 | Other derivatives    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: 0 0
Fair Value Measured on a Recurring Basis | Level 2    
Assets:    
Total assets 2,033 1,374
Liabilities:    
Total liabilities 377 182
Fair Value Measured on a Recurring Basis | Level 2 | Time deposits    
Assets:    
Cash Equivalents: 1,773 1,012
Fair Value Measured on a Recurring Basis | Level 2 | Government debt    
Assets:    
Cash Equivalents: 0 0
Fair Value Measured on a Recurring Basis | Level 2 | Financial institution instruments    
Assets:    
Available-for-Sale Investments: 3 3
Fair Value Measured on a Recurring Basis | Level 2 | Marketable securities and mutual funds    
Assets:    
Available-for-Sale Investments: 123 130
Fair Value Measured on a Recurring Basis | Level 2 | Interest rate contracts    
Assets:    
Derivative Instruments: 0 4
Liabilities:    
Derivative Instruments: 4 22
Fair Value Measured on a Recurring Basis | Level 2 | Foreign currency contracts    
Assets:    
Derivative Instruments: 133 225
Liabilities:    
Derivative Instruments: 372 158
Fair Value Measured on a Recurring Basis | Level 2 | Other derivatives    
Assets:    
Derivative Instruments: 1 0
Liabilities:    
Derivative Instruments: 1 2
Fair Value Measured on a Recurring Basis | Level 3    
Assets:    
Total assets 0 0
Liabilities:    
Total liabilities 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Time deposits    
Assets:    
Cash Equivalents: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Government debt    
Assets:    
Cash Equivalents: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Financial institution instruments    
Assets:    
Available-for-Sale Investments: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Marketable securities and mutual funds    
Assets:    
Available-for-Sale Investments: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Interest rate contracts    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Foreign currency contracts    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: 0 0
Fair Value Measured on a Recurring Basis | Level 3 | Other derivatives    
Assets:    
Derivative Instruments: 0 0
Liabilities:    
Derivative Instruments: $ 0 $ 0