Fair Value Measurements (Details) - Fair value, measurements, recurring - USD ($) $ in Millions | Jan. 31, 2022 | Jul. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | $ 483.7 | $ 391.9 |
Short-term investments: | 1,417.6 | 1,026.9 |
Long-term investments: | 851 | 888.3 |
Prepaid expenses and other current assets: | 2.1 | 4.1 |
Other assets: | 0 | 0.1 |
Total assets measured at fair value | 2,754.4 | 2,311.3 |
Total accrued and other liabilities | 17.2 | 6.4 |
Other long-term liabilities: | 0.1 | 0.5 |
Total liabilities measured at fair value | 17.3 | 6.9 |
Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 475 | 124.2 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Prepaid expenses and other current assets: | 0 | 0 |
Other assets: | 0 | 0 |
Total assets measured at fair value | 475 | 124.2 |
Total accrued and other liabilities | 0 | 0 |
Other long-term liabilities: | 0 | 0 |
Total liabilities measured at fair value | 0 | 0 |
Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 8.7 | 267.7 |
Short-term investments: | 1,417.6 | 1,026.9 |
Long-term investments: | 851 | 888.3 |
Prepaid expenses and other current assets: | 2.1 | 4.1 |
Other assets: | 0 | 0.1 |
Total assets measured at fair value | 2,279.4 | 2,187.1 |
Total accrued and other liabilities | 17.2 | 6.4 |
Other long-term liabilities: | 0.1 | 0.5 |
Total liabilities measured at fair value | 17.3 | 6.9 |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Prepaid expenses and other current assets: | 0 | 0 |
Other assets: | 0 | 0 |
Total assets measured at fair value | 0 | 0 |
Total accrued and other liabilities | 0 | 0 |
Other long-term liabilities: | 0 | 0 |
Total liabilities measured at fair value | 0 | 0 |
Money market funds | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 475 | 124.2 |
Money market funds | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 475 | 124.2 |
Money market funds | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Money market funds | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Certificates of deposit | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 150.4 |
Short-term investments: | 305.6 | 12.4 |
Long-term investments: | 0 | 5 |
Certificates of deposit | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Certificates of deposit | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 150.4 |
Short-term investments: | 305.6 | 12.4 |
Long-term investments: | 0 | 5 |
Certificates of deposit | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Commercial paper | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 1.2 | 0 |
Commercial paper | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 0 | 0 |
Commercial paper | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 1.2 | 0 |
Commercial paper | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 0 | 0 |
Corporate debt securities | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 8.7 | 1 |
Short-term investments: | 325.1 | 208.9 |
Long-term investments: | 454.1 | 180.7 |
Corporate debt securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Corporate debt securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 8.7 | 1 |
Short-term investments: | 325.1 | 208.9 |
Long-term investments: | 454.1 | 180.7 |
Corporate debt securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
U.S. government and agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 116.3 |
Short-term investments: | 734.2 | 762.1 |
Long-term investments: | 362.8 | 674.1 |
U.S. government and agency securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
U.S. government and agency securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 116.3 |
Short-term investments: | 734.2 | 762.1 |
Long-term investments: | 362.8 | 674.1 |
U.S. government and agency securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Cash equivalents: | 0 | 0 |
Short-term investments: | 0 | 0 |
Long-term investments: | 0 | 0 |
Non-U.S. government and agency securities | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 51.5 | 43.5 |
Long-term investments: | 8.8 | 28.5 |
Non-U.S. government and agency securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | | |
Long-term investments: | 0 | 0 |
Non-U.S. government and agency securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | 51.5 | 43.5 |
Long-term investments: | 8.8 | 28.5 |
Non-U.S. government and agency securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Short-term investments: | | |
Long-term investments: | 0 | 0 |
Asset-backed securities | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Long-term investments: | 25.3 | 0 |
Asset-backed securities | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Long-term investments: | 0 | 0 |
Asset-backed securities | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Long-term investments: | 25.3 | 0 |
Asset-backed securities | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Long-term investments: | 0 | 0 |
Foreign currency forward contracts | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Prepaid expenses and other current assets: | 2.1 | 4.1 |
Other assets: | 0 | 0.1 |
Accrued and other liabilities: | 17.2 | 6.4 |
Other long-term liabilities: | 0.1 | 0.5 |
Foreign currency forward contracts | Level 1 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Prepaid expenses and other current assets: | 0 | 0 |
Other assets: | 0 | 0 |
Accrued and other liabilities: | 0 | 0 |
Other long-term liabilities: | 0 | 0 |
Foreign currency forward contracts | Level 2 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Prepaid expenses and other current assets: | 2.1 | 4.1 |
Other assets: | 0 | 0.1 |
Accrued and other liabilities: | 17.2 | 6.4 |
Other long-term liabilities: | 0.1 | 0.5 |
Foreign currency forward contracts | Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis | | |
Prepaid expenses and other current assets: | 0 | 0 |
Other assets: | 0 | 0 |
Accrued and other liabilities: | 0 | 0 |
Other long-term liabilities: | $ 0 | $ 0 |