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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Effective income tax rate (as a percent) | 18.70% | 16.50% | 12.60%
Federal statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
Discrete tax adjustments | $ 8,200 |  | $ 1,700
Discrete tax adjustments, prior year | 17,000 | $ 19,800 |
Deduction in FDII | 37,200 |  |
Tax benefits | 14,400 | 29,800 | 92,500
Investment tax credits | 10,000 |  |
Increase in valuation allowance | 4,200 |  |
Tax credit carryforward | 29,900 | 24,400 |
Valuation allowance | 29,171 | 24,987 |
Unrecognized tax benefits that would impact effective tax rate | 44,200 | 37,800 |
Interest and penalties related to income tax | 8,900 | $ 7,200 | $ 8,900
Undistributed earnings | $ 300,000 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126928070&loc=d3e28511-109314 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126928070&loc=d3e28446-109314 + Details
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