Cash, Cash Equivalents and Investments - Summary of Contractual Maturity (Details) $ in Millions	Apr. 30, 2023 USD ($)
Contractual maturities of investments
Due in one year or less, Cost	$ 487
Due after one through five years, Cost	964
No single maturity date, Cost	1,025
Total short-term and long-term investments cost	2,476
Due in one year or less, Estimated Fair Value	482
Due after one through five years, Estimated Fair Value	941
No single maturity date, Estimated Fair Value	1,111
Estimated fair value of short-term and long-term investments	$ 2,534