Segment Reporting - Sales By Geographic Regions (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Feb. 28, 2018	Feb. 28, 2017	May 31, 2018	May 31, 2017	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 8,583,982	$ 9,087,328	$ 6,980,153	$ 8,031,884	$ 7,996,339	$ 8,638,410	$ 7,400,773	$ 8,001,904	$ 15,012,037	$ 15,402,677	$ 24,099,365	$ 24,041,087	$ 32,683,347	$ 32,037,426	$ 30,355,260
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales													29,475,724	29,068,842	26,571,367
South America
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales													1,569,330	1,441,316	1,847,284
Europe, the Middle East and Africa (EMEA)
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales													536,501	652,308	878,407
Asia Pacific (APAC)
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales													$ 1,101,792	$ 874,960	$ 1,058,202