Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - USD ($)
$ in Thousands |
Jan. 31, 2022 |
Jul. 31, 2021 |
| Financial Assets: |
|
|
| Short-term investments: |
$ 891,026
|
$ 928,006
|
| Recurring |
|
|
| Financial Assets: |
|
|
| Total measured at fair value |
1,031,493
|
1,032,588
|
| Cash |
260,282
|
181,141
|
| Total cash, cash equivalents and short-term investments |
1,291,775
|
1,213,729
|
| Recurring | Money market funds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
80,527
|
72,583
|
| Recurring | Commercial paper |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
44,944
|
29,997
|
| Short-term investments: |
300,594
|
347,088
|
| Recurring | Corporate bonds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
|
2,002
|
| Short-term investments: |
448,951
|
513,688
|
| Recurring | U.S. government securities |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
14,996
|
|
| Short-term investments: |
141,481
|
67,230
|
| Recurring | Level I |
|
|
| Financial Assets: |
|
|
| Total measured at fair value |
80,527
|
72,583
|
| Recurring | Level I | Money market funds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
80,527
|
72,583
|
| Recurring | Level I | Commercial paper |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
0
|
| Short-term investments: |
0
|
0
|
| Recurring | Level I | Corporate bonds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
0
|
0
|
| Recurring | Level I | U.S. government securities |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
|
| Short-term investments: |
0
|
|
| Recurring | Level II |
|
|
| Financial Assets: |
|
|
| Total measured at fair value |
950,966
|
960,005
|
| Recurring | Level II | Money market funds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
0
|
| Recurring | Level II | Commercial paper |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
44,944
|
29,997
|
| Short-term investments: |
300,594
|
347,088
|
| Recurring | Level II | Corporate bonds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
|
2,002
|
| Short-term investments: |
448,951
|
513,688
|
| Recurring | Level II | U.S. government securities |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
14,996
|
|
| Short-term investments: |
141,481
|
67,230
|
| Recurring | Level III |
|
|
| Financial Assets: |
|
|
| Total measured at fair value |
0
|
0
|
| Recurring | Level III | Money market funds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
0
|
| Recurring | Level III | Commercial paper |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
0
|
| Short-term investments: |
0
|
0
|
| Recurring | Level III | Corporate bonds |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
|
0
|
| Short-term investments: |
0
|
0
|
| Recurring | Level III | U.S. government securities |
|
|
| Financial Assets: |
|
|
| Cash equivalents: |
0
|
|
| Short-term investments: |
$ 0
|
$ 0
|