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Net Income Per Share (Details) - shares
shares in Thousands
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2019
Earnings Per Share [Abstract]      
Weighted average common shares outstanding 236,252 233,202 230,489
Effect of dilutive securities 4,038 5,454 9,964
Weighted average common and dilutive potential common shares outstanding 240,290 238,656 240,453