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Income Taxes (Reconciliations of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward] |  |  |
Beginning balance | $ 164,383 | $ 256,705 | $ 201,355
Additions for tax positions of prior years | 9,841 | 20,158 | 14,465
Reductions for tax positions of prior years | (9,346) | (106,252) | (21,045)
Additions for tax positions related to current year | 26,360 | 35,769 | 81,866
Cash settlements | (510) | 0 | (1,659)
Reductions from lapses in statutes of limitations | (1,054) | (2,570) | (7,496)
Reductions from non-cash settlements with taxing authorities | (2,226) | (35,582) | (5,928)
Foreign exchange rate adjustment | 2,345 | (3,845) | (4,853)
Ending balance | 189,793 | 164,383 | 256,705
Unrecognized tax benefits that would affect the effective tax rate (if recognized) | $ 108,551 | $ 93,237 | $ 117,455

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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