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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Revenues - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Revenues - Narrative (Details) - USD ($) $ in Thousands	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Sep. 01, 2018	Aug. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Overall decrease to revenues	$ (8,497,941)	$ (9,087,328)	$ (23,465,769)	$ (24,099,365)
Contract liabilities	182,900		182,900			$ 172,000
Revenue recognized	67,900		148,900
Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect of adoption for all contracts and customers that had not been completed as of the adoption date					$ 1,000
Overall decrease to revenues	(3,783,752)		(9,415,783)
Difference between Revenue Guidance in Effect before and after Topic 606 \| Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Overall decrease to revenues	$ 14,200		$ 36,900