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Income Taxes (Reconciliation Of Effective Income Tax Rate And Effective Rate From Continuing Operation) (Details) | 12 Months Ended
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Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
At U.S. federal income tax rate | 21.00% | 21.00% | 26.80%
State income tax, net of federal benefit | 3.50% | 2.80% | 3.00%
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent | (3.80%) | (1.60%) | 0.00%
Change in valuation allowance | 0.00% | 0.00% | 0.30%
Excess tax benefits related to stock-based compensation | (7.10%) | (3.00%) | (20.90%)
Impacts of the Tax Act and other legislative changes | (3.20%) | 0.00% | (24.70%)
Noncontrolling interests | (2.40%) | (1.50%) | (1.70%)
Foreign rate differential | (2.40%) | 0.40% | (1.50%)
Other | 0.70% | 0.80% | 0.70%
Effective tax rate | 6.30% | 18.90% | (18.00%)

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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