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Income Taxes (Reconciliation of Income Tax Rate) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
U.S. federal statutory income tax rate | 21.00% | 25.70% | 35.00%
State income taxes, net of federal tax benefit | (1.70%) | (1.50%) | (3.30%)
Impact of foreign tax rates | (9.90%) | (19.30%) | (42.70%)
Permanent impact of non-deductible cost | 1.80% | 5.90% | 2.90%
Income tax credits | (3.10%) | (2.80%) | (6.30%)
Changes in tax rates on deferred tax assets and liabilities | 0.20% | 4.00% | 0.30%
One-time transition tax related to the Tax Act | (0.005) | 0.622 | 0.000
Indefinite reinvestment assertion impact | 0.90% | 5.80% | 0.00%
Valuation allowance | 1.30% | (16.40%) | 14.80%
Non-deductible equity compensation | 1.40% | 5.50% | 4.50%
Impact of intercompany charges and dividends | 10.40% | 7.30% | 38.30%
Reclassification of stranded tax effects in AOCI | (0.00%) | (4.00%) | (0.00%)
Global Intangible Low-Taxed Income | 10.40% | 0.00% | 0.00%
Other, net | 3.60% | 4.20% | 6.90%
Effective income tax rate | 35.80% | 76.60% | 50.40%
Income tax benefit on income from subsidiaries | $ 67.3 | $ 52.1 | $ 38.6
Per basic share income tax benefit on income from subsidiaries (in dollars per share) | $ 0.43 | $ 0.30 | $ 0.22
Reversal of valuation allowance | $ 17.5 |  |

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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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