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Income Taxes
 6 Months Ended
Jan. 31, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The Company recognized an income tax benefit of $11.0 million and $14.2 million for the three months ended January 31, 2022 and 2021, respectively, and $28.0 million and$24.9 million for the six months ended January 31, 2022 and 2021, respectively. The change in the amount of income taxes recorded for the three months ended January 31, 2022, compared to the same period a year ago, was primarily due to the increase in loss before tax, offset by the release of uncertain tax positions in the prior year. The change in the amount of income taxes recorded for the six months ended January 31, 2022, 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 the release of uncertain tax positions in the prior year and the tax impact caused by the tax status change of certain foreign subsidiaries for U.S. tax purposes. The effective tax rate of 21% and 23% for the three and six months ended January 31, 2022, respectively, could differ 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 and six months ended January 31, 2022, unrecognized tax benefits increased by $0.4 million and $0.9 million, respectively. As of January 31, 2022, the Company had unrecognized tax benefits of $11.6 million that, if recognized, would affect the Company’s effective tax rate.