Income Taxes (Reconciliations of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
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

Amount of increase (decrease) in unrecognized tax benefits resulting from foreign exchange rate adjustments.

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The gross amount of decreases in unrecognized tax benefits resulting from cash settlements.

+ References

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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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
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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