Fair Value - Schedule of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Apr. 30, 2025	Oct. 31, 2024
Assets
Total assets	$ 10,629	$ 13,744
Liabilities
Total liabilities	417	163
Time deposits
Assets
Total assets	2,335	601
Money market funds
Assets
Total assets	7,969	12,639
Equity investments
Assets
Total assets	54	88
Foreign bonds
Assets
Total assets	107	103
Other debt securities
Assets
Total assets	9	14
Foreign exchange contracts
Assets
Total assets	152	299
Liabilities
Total liabilities	389	103
Interest rate contracts
Liabilities
Total liabilities	28	58
Other derivatives
Assets
Total assets	3	0
Liabilities
Total liabilities	0	2
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets	7,969	12,639
Liabilities
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Time deposits
Assets
Total assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Money market funds
Assets
Total assets	7,969	12,639
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Equity investments
Assets
Total assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Foreign bonds
Assets
Total assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other debt securities
Assets
Total assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Foreign exchange contracts
Assets
Total assets	0	0
Liabilities
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Interest rate contracts
Liabilities
Total liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other derivatives
Assets
Total assets	0	0
Liabilities
Total liabilities	0	0
Significant Other Observable Remaining Inputs (Level 2)
Assets
Total assets	2,596	1,002
Liabilities
Total liabilities	417	163
Significant Other Observable Remaining Inputs (Level 2) \| Time deposits
Assets
Total assets	2,335	601
Significant Other Observable Remaining Inputs (Level 2) \| Money market funds
Assets
Total assets	0	0
Significant Other Observable Remaining Inputs (Level 2) \| Equity investments
Assets
Total assets	0	0
Significant Other Observable Remaining Inputs (Level 2) \| Foreign bonds
Assets
Total assets	106	102
Significant Other Observable Remaining Inputs (Level 2) \| Other debt securities
Assets
Total assets	0	0
Significant Other Observable Remaining Inputs (Level 2) \| Foreign exchange contracts
Assets
Total assets	152	299
Liabilities
Total liabilities	389	103
Significant Other Observable Remaining Inputs (Level 2) \| Interest rate contracts
Liabilities
Total liabilities	28	58
Significant Other Observable Remaining Inputs (Level 2) \| Other derivatives
Assets
Total assets	3	0
Liabilities
Total liabilities	0	2
Significant Other Unobservable Remaining Inputs (Level 3)
Assets
Total assets	64	103
Liabilities
Total liabilities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) \| Time deposits
Assets
Total assets	0	0
Significant Other Unobservable Remaining Inputs (Level 3) \| Money market funds
Assets
Total assets	0	0
Significant Other Unobservable Remaining Inputs (Level 3) \| Equity investments
Assets
Total assets	54	88
Significant Other Unobservable Remaining Inputs (Level 3) \| Foreign bonds
Assets
Total assets	1	1
Significant Other Unobservable Remaining Inputs (Level 3) \| Other debt securities
Assets
Total assets	9	14
Significant Other Unobservable Remaining Inputs (Level 3) \| Foreign exchange contracts
Assets
Total assets	0	0
Liabilities
Total liabilities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) \| Interest rate contracts
Liabilities
Total liabilities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) \| Other derivatives
Assets
Total assets	0	0
Liabilities
Total liabilities	$ 0	$ 0