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Supplementary Balance Sheet Information (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020
Balance Sheet Related Disclosures [Abstract] |  |  |
Asset impairments | $ 0 | $ 0 | $ 28,372
Amortization of Intangible Assets | 5,200 | 5,400 | 6,500
Finite-Lived Intangible Asset, Expected Amortization, Year Five | 3,800 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Four | 3,800 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Three | 3,800 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Two | 3,800 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year One | 3,800 |  |
Depreciation expense | $ 247,200 | $ 247,200 | $ 243,100

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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