Financial Instruments - Schedule of Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions	Jul. 31, 2023	Oct. 31, 2022
Cash Equivalents:
Cost	$ 822	$ 2,193
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	822	2,193
Available-for-Sale Investments:
Cost	44	55
Gross Unrealized Gain	35	8
Gross Unrealized Loss	0	0
Fair Value	79	63
Total cash equivalents and available-for-sale investments, Cost	866	2,248
Total cash equivalents and available-for-sale investments, Gross Unrealized Gain	35	8
Total cash equivalents and available-for-sale investments, Gross Unrealized Loss	0	0
Total cash equivalents and available-for-sale investments, Fair Value	901	2,256
Corporate debt
Cash Equivalents:
Cost	460	904
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	460	904
Government debt
Cash Equivalents:
Cost	362	1,289
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	362	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	35	8
Equity securities, Gross Unrealized Loss	0	0
Equity securities, Fair Value	$ 76	$ 58