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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
Revenues - Narrative (Details) - USD ($) $ in Thousands	Nov. 30, 2018	Nov. 30, 2017	Sep. 01, 2018	Aug. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Overall decrease to revenues	$ (8,484,289)	$ (8,031,884)
Contract liabilities	187,900			$ 177,900
Revenue recognized	95,200
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	(3,301,250)
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	$ 13,100