Financial Instruments - Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions	Oct. 31, 2022	Oct. 31, 2021
Cash Equivalents:
Cost	$ 2,193	$ 3,043
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	2,193	3,043
Available-for-Sale Investments:
Total available-for-sale investments, Cost	55	47
Total available-for-sale investments, Gross Unrealized Gain	8	29
Total available-for-sale investments, Gross Unrealized Loss	0	0
Total available-for-sale investments, Fair Value	63	76
Cost	2,248	3,090
Gross Unrealized Gain	8	29
Gross Unrealized Loss	0	0
Fair Value	2,256	3,119
Corporate debt
Cash Equivalents:
Cost	904	1,112
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	904	1,112
Government debt
Cash Equivalents:
Cost	1,289	1,931
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	1,289	1,931
Financial Institution Instrument
Available-for-Sale Investments:
Debt securities, Cost	5	5
Debt securities, Gross Unrealized Gain	0	0
Debt securities, Gross Unrealized Loss	0	0
Debt securities, Fair Value	5	5
Marketable equity securities and mutual funds
Available-for-Sale Investments:
Equity securities, Cost	50	42
Equity securities, Gross Unrealized Gain	8	29
Equity securities, Gross Unrealized Loss	0	0
Equity securities, Fair Value	$ 58	$ 71