Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Apr. 30, 2025	Oct. 31, 2024
Assets:
Cash Equivalents:	$ 1,958	$ 2,344
Derivative Instruments:	66	229
Liabilities:
Derivative Instruments:	571	182
Fair Value Measured on a Recurring Basis
Assets:
Total assets	2,203	2,760
Liabilities:
Total liabilities	571	182
Fair Value Measured on a Recurring Basis | Time deposits
Assets:
Cash Equivalents:	1,237	1,012
Fair Value Measured on a Recurring Basis | Government debt
Assets:
Cash Equivalents:	721	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:	176	184
Liabilities:
Debt securities, restricted	69	78
Fair Value Measured on a Recurring Basis | Interest rate contracts
Assets:
Derivative Instruments:	0	4
Liabilities:
Derivative Instruments:	6	22
Fair Value Measured on a Recurring Basis | Foreign currency contracts
Assets:
Derivative Instruments:	63	225
Liabilities:
Derivative Instruments:	565	158
Fair Value Measured on a Recurring Basis | Other derivatives
Assets:
Derivative Instruments:	3	0
Liabilities:
Derivative Instruments:	0	2
Fair Value Measured on a Recurring Basis | Level 1
Assets:
Total assets	774	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:	721	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:	53	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	1,429	1,374
Liabilities:
Total liabilities	571	182
Fair Value Measured on a Recurring Basis | Level 2 | Time deposits
Assets:
Cash Equivalents:	1,237	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:	6	22
Fair Value Measured on a Recurring Basis | Level 2 | Foreign currency contracts
Assets:
Derivative Instruments:	63	225
Liabilities:
Derivative Instruments:	565	158
Fair Value Measured on a Recurring Basis | Level 2 | Other derivatives
Assets:
Derivative Instruments:	3	0
Liabilities:
Derivative Instruments:	0	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