Revenue - Revenues Disaggregated by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Disaggregation of Revenue [Line Items]
Net revenue	$ 6,066,990	$ 5,301,101	$ 12,573,265	$ 10,886,633
Point in time
Disaggregation of Revenue [Line Items]
Net revenue	2,301,695		4,824,007
Over time
Disaggregation of Revenue [Line Items]
Net revenue	3,765,295		7,749,258
EMS
Disaggregation of Revenue [Line Items]
Net revenue	3,804,727		7,307,830
EMS | Point in time
Disaggregation of Revenue [Line Items]
Net revenue	836,863		1,257,524
EMS | Over time
Disaggregation of Revenue [Line Items]
Net revenue	2,967,864		6,050,306
DMS
Disaggregation of Revenue [Line Items]
Net revenue	2,262,263		5,265,435
DMS | Point in time
Disaggregation of Revenue [Line Items]
Net revenue	1,464,832		3,566,483
DMS | Over time
Disaggregation of Revenue [Line Items]
Net revenue	$ 797,431		$ 1,698,952