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Income Taxes (Reconciliation of Income Tax Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2018 | Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |
Tax at U.S. federal statutory income tax rate |  | $ 95,852 | $ 89,682 | $ 135,470
State income taxes, net of federal tax benefit |  | (5,417) | (8,474) | (5,121)
Impact of foreign tax rates |  | (71,889) | (109,466) | (144,521)
Permanent impact of non-deductible cost |  | 21,988 | 7,336 | 3,408
Income tax credits |  | (10,405) | (16,254) | (5,040)
Changes in tax rates on deferred tax assets and liabilities |  | 15,048 | 688 | 182
Transition tax related to the Tax Act |  | 232,405 | 0 | 0
Change in indefinite reinvestment assertion related to the Tax Act |  | 21,754 | 0 | 0
Valuation allowance |  | (61,186) | 37,934 | 11,770
Non-deductible equity compensation |  | 20,443 | 11,531 | 18,350
Impact of intercompany charges and dividends |  | 27,442 | 98,052 | 94,596
Reclassification of stranded tax effects in AOCI |  | (14,811) | 0 | 0
Other, net |  | 14,636 | 18,037 | 23,055
Total income tax expense |  | $ 285,860 | $ 129,066 | $ 132,149
U.S. federal statutory income tax rate |  | 25.67% | 35.00% | 35.00%
Tax Cuts and Jobs Act, one-time mandatory repatriation tax | $ 24,900 | $ 65,900 |  |
Tax Cuts and Jobs Act, change in indefinite reinvestment assertion on certain earnings from foreign subsidiaries | $ 85,000 | $ 85,000 |  |

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- Definition Amount 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 Amount 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 nondeductible expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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