Financial Instruments - Schedule of Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions	Apr. 30, 2023	Oct. 31, 2022
Cash Equivalents:
Cost	$ 981	$ 2,193
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	981	2,193
Available-for-Sale Investments:
Cost	44	55
Gross Unrealized Gain	12	8
Gross Unrealized Loss	0	0
Fair Value	56	63
Total cash equivalents and available-for-sale investments, Cost	1,025	2,248
Total cash equivalents and available-for-sale investments, Gross Unrealized Gain	12	8
Total cash equivalents and available-for-sale investments, Gross Unrealized Loss	0	0
Total cash equivalents and available-for-sale investments, Fair Value	1,037	2,256
Corporate debt
Cash Equivalents:
Cost	607	904
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	607	904
Government debt
Cash Equivalents:
Cost	374	1,289
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	374	1,289
Financial institution instruments
Available-for-Sale Investments:
Debt securities, cost	3	5
Debt securities, Gross Unrealized Gain	0	0
Debt securities, Gross Unrealized Loss	0	0
Debt securities, Fair value	3	5
Marketable securities and mutual funds
Available-for-Sale Investments:
Equity securities, Cost	41	50
Equity securities, Gross Unrealized Gain	12	8
Equity securities, Gross Unrealized Loss	0	0
Equity securities, Fair Value	$ 53	$ 58