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Revenue Recognition (Sales by Geography and Customer Type) (Details) - Net sales	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | U.S. government
Concentration Risk [Line Items]
Concentration risk, percentage	31.50%	29.80%	33.50%	30.90%
Geographic Concentration Risk | Domestic
Concentration Risk [Line Items]
Concentration risk, percentage	42.90%	46.70%	41.50%	46.70%
Geographic Concentration Risk | Total United States
Concentration Risk [Line Items]
Concentration risk, percentage	74.40%	76.50%	75.00%	77.60%
Geographic Concentration Risk | International
Concentration Risk [Line Items]
Concentration risk, percentage	25.60%	23.50%	25.00%	22.40%
Customer Concentration Risk | Verizon Communications Inc.
Concentration Risk [Line Items]
Concentration risk, percentage		11.30%		11.90%

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