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Revenue Recognition (Sales by Geography and Customer Type) (Details) - Net sales | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 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 | 34.40% | 29.10% | 33.80% | 30.30%
Geographic Concentration Risk | Domestic |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage | 48.10% | 43.80% | 43.50% | 45.70%
Geographic Concentration Risk | Total United States |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage | 82.50% | 72.90% | 77.30% | 76.00%
Geographic Concentration Risk | International |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage | 17.50% | 27.10% | 22.70% | 24.00%
Customer Concentration Risk | Verizon Communications Inc. |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  |  |  | 11.20%

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