CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (UNAUDITED) [Abstract]
Net sales	$ 30,184	$ 26,573	$ 59,217	$ 46,127
Cost of sales	22,240	19,691	43,771	33,949
Gross Profit	7,944	6,882	15,446	12,178
Selling, general and administrative expenses	6,084	5,606	12,118	10,062
Equity earnings in Alliance Boots	0	101	0	315
Operating Income	1,860	1,377	3,328	2,431
Gain on previously held equity interest	0	706	0	706
Other income (expense)	(496)	504	(553)	703
Earnings Before Interest and Income Tax Provision	1,364	2,587	2,775	3,840
Interest expense, net	140	144	278	199
Earnings Before Income Tax Provision	1,224	2,443	2,497	3,641
Income tax provision	301	391	468	712
Post tax earnings from equity method investments	9	8	20	8
Net Earnings	932	2,060	2,049	2,937
Net earnings attributable to noncontrolling interests	2	18	9	45
Net Earnings Attributable to Walgreens Boots Alliance, Inc.	$ 930	$ 2,042	$ 2,040	$ 2,892
Net earnings per common share attributable to Walgreens Boots Alliance, Inc. - basic (in dollars per share)	$ 0.86	$ 1.96	$ 1.88	$ 2.91
Net earnings per common share attributable to Walgreens Boots Alliance, Inc. - diluted (in dollars per share)	0.85	1.93	1.87	2.88
Dividends declared per share (in dollars per share)	$ 0.3600	$ 0.3375	$ 0.7200	$ 0.6750
Average shares outstanding (in shares)	1,080.2	1,043.6	1,084.6	994.7
Dilutive effect of stock options (in shares)	8.2	11.1	8.9	10.6
Average diluted shares (in shares)	1,088.4	1,054.7	1,093.5	1,005.3