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Income Taxes
 3 Months Ended
Oct. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company recognized an income tax benefit of $17.0 million and $10.7 million for the three months ended October 31, 2021 and 2020, respectively. The change in the amount of income taxes recorded for the three months ended October 31, 2021 compared to the same period a year ago was primarily due to the increase in the loss before taxes and research and development credits, offset by a tax status change of certain foreign subsidiaries for U.S. tax purposes and certain non-deductible expenses. The effective tax rate of 25% for the three months ended October 31, 2021 differs from the statutory U.S. federal income tax rate of 21% mainly due to permanent differences for stock-based compensation including excess tax benefits, research and development credits, and certain non-deductible expenses including executive compensation.
During the three months ended October 31, 2021, unrecognized tax benefits increased by $0.4 million. As of October 31, 2021, the Company had unrecognized tax benefits of $11.1 million that, if recognized, would affect the Company’s effective tax rate.