Recently Adopted Accounting Standards (Details) - USD ($) $ in Millions	Feb. 28, 2019	Aug. 31, 2018	Aug. 30, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables	$ 4,416	$ 5,592	$ 5,478
Inventories	4,390	3,590	3,595
Other current assets	211	180	164
Deferred tax assets	762	986	1,022
Other current liabilities	665	517	521
Other noncurrent liabilities	993	582	581
Retained earnings	$ 29,364	24,487	$ 24,395
ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables		114
Inventories		(5)
Other current assets		30
Deferred tax assets		(92)
Other current liabilities		(4)
Other noncurrent liabilities		1
Retained earnings		50
ASU 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables		0
Inventories		0
Other current assets		(14)
Deferred tax assets		56
Other current liabilities		0
Other noncurrent liabilities		0
Retained earnings		$ 42