Related parties (Tables)

6 Months Ended

Feb. 28, 2018

Related Party Transactions [Abstract]

Schedule of Related Party Transactions

Related party transactions (in millions):

	Three months ended February 28,				Six months ended February 28,
	2018		2017		2018		2017
Purchases, net	$	12,132	$	10,602	$	23,736	$	21,238

	February 28, 2018		August 31, 2017
Trade accounts payable, net	$	5,488	$	4,384