Equity Method Investments, Summarized Financial Information of Equity Method Investees (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Feb. 29, 2016	Feb. 28, 2015	[4]	Feb. 29, 2016	Feb. 28, 2015	[4]	Aug. 31, 2015
Balance Sheet [Abstract]
Current assets	[1]	$ 5,687			$ 5,687			$ 5,015
Noncurrent assets	[1]	1,592			1,592			1,548
Current liabilities	[1]	4,598			4,598			3,936
Noncurrent liabilities	[1]	876			876			837
Shareholders' equity	[1],[2]	1,805			1,805			$ 1,790
Statements of Earnings [Abstract]
Net sales	[3]	3,286	$ 5,317		6,489	$ 14,978
Gross Profit	[3]	374	979		702	3,168
Net Income	[3]	26	246		50	743
Share of income from equity method investments	[3]	$ 9	$ 109		$ 20	$ 323

[1] Balance sheet information of foreign equity method investments are translated at their respective February 29, 2016 and August 31, 2015 spot rates.

[2] Shareholders' equity at February 29, 2016 and August 31, 2015 includes $170 million and $163 million, respectively, related to noncontrolling interests.

[3] Statement of earnings information of foreign equity method investments are translated at their respective average exchange rates.

[4] Includes equity method investment in Alliance Boots from Walgreen Co.'s pre-merger 45 percent interest for one month (December 2014) and four months (September through December 2014), respectively. See Note 1, Organization.