Income Taxes
 6 Months Ended
Feb. 28, 2022
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Effective Income Tax Rate
The U.S. federal statutory income tax rate and the Company's effective income tax rate are as follows:
Three months ended Six months ended
February 28, 2022 February 28, 2021 February 28, 2022 February 28, 2021
U.S. federal statutory income tax rate 21.0  % 21.0  % 21.0  % 21.0  %
Effective income tax rate 21.7  % 26.9  % 22.8  % 28.5  %
The effective income tax rate decreased for the three months and six months ended February 28, 2022, compared to the three months and six months ended February 28, 2021, primarily due to decreased losses in tax jurisdictions with existing valuation allowances for the three months and six months ended February 28, 2022.
The effective income tax rate differed from the U.S. federal statutory income tax rate of 21.0% during the three months and six months ended February 28, 2022 and 2021, primarily due to: (i) losses in tax jurisdictions with existing valuation allowances and (ii) tax incentives granted to sites in China, Malaysia, Singapore and Vietnam.