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Income Taxes (Reconciliation of Income Tax Rate) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Aug. 31, 2021 | Aug. 31, 2020 | Aug. 31, 2019
Income Tax Disclosure [Abstract] |  |  |
U.S. federal statutory income tax rate | 21.00% | 21.00% | 21.00%
State income taxes, net of federal tax benefit | 0.20% | (2.60%) | (1.70%)
Impact of foreign tax rates | (4.60%) | (0.90%) | (9.90%)
Permanent differences | (0.40%) | 3.20% | 1.80%
Income tax credits | (0.40%) | (2.50%) | (3.10%)
Changes in tax rates on deferred tax assets and liabilities | 0.00% | 10.30% | 0.20%
One-time transition tax related to the Tax Act | 0 | 0 | (0.005)
Indefinite reinvestment assertion impact | 0.00% | 0.00% | 0.90%
Valuation allowance | 1.30% | 16.80% | 1.30%
Non-deductible equity compensation | 0.60% | 2.20% | 1.40%
Impact of intercompany charges and dividends | 4.40% | 15.00% | 10.40%
Global Intangible Low-Taxed Income | 3.00% | 13.70% | 10.40%
Other, net | 0.90% | 2.00% | 3.60%
Effective income tax rate | 26.00% | 78.20% | 35.80%
Income tax benefit on income from subsidiaries | $ 51 | $ 43 | $ 67
Per basic share income tax benefit on income from subsidiaries (in dollars per share) | $ 0.34 | $ 0.28 | $ 0.43
Income tax expense associated with remeasurement of referred tax assets |  | $ 21 |
Reversal of valuation allowance |  |  | $ 18

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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 intercompany charges under enacted tax laws. + References No definition available. + Details
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- Definition Total value of income tax benefit earned on various foreign subsidiary operations of the Company that have been granted tax incentives. + References No definition available. + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: 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=121826272&loc=d3e32687-109319 + Details
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