Financial Instruments - Schedule of Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions	Jul. 31, 2024	Oct. 31, 2023
Cash Equivalents:
Cost	$ 1,968	$ 2,489
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	1,968	2,489
Available-for-Sale Investments:
Cost	126	43
Gross Unrealized Gain	60	38
Gross Unrealized Loss	0	0
Fair Value	186	81
Total cash equivalents and available-for-sale investments, cost	2,094	2,532
Total cash equivalents and available-for-sale investments, gross unrealized gain	60	38
Total cash equivalents and available-for-sale investments, gross unrealized loss	0	0
Total cash equivalents and available-for-sale investments, fair value	2,154	2,570
Corporate debt
Cash Equivalents:
Cost	990	589
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	990	589
Government debt
Cash Equivalents:
Cost	978	1,900
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Fair Value	978	1,900
Financial institution instruments
Available-for-Sale Investments:
Debt securities, cost	3	3
Debt securities, gross unrealized gain	0	0
Debt securities, gross unrealized loss	0	0
Debt securities, fair value	3	3
Marketable securities and mutual funds
Available-for-Sale Investments:
Equity securities, cost	123	40
Equity securities, gross unrealized gain	60	38
Equity securities, gross unrealized loss	0	0
Equity securities, fair value	183	$ 78
Debt securities, restricted	$ 82