CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Income Statement [Abstract]
Sales	$ 30,740	$ 28,501
Cost of sales	23,399	21,385
Gross profit	7,341	7,116
Selling, general and administrative expenses	5,907	5,686
Equity earnings (loss) in AmerisourceBergen	(112)	17
Operating income	1,322	1,447
Other income (expense)	(137)	1
Earnings before interest and income tax provision	1,185	1,448
Interest expense, net	149	173
Earnings before income tax provision	1,036	1,275
Income tax provision	227	220
Post tax earnings from other equity method investments	13	12
Net earnings	822	1,067
Net earnings attributable to noncontrolling interests	1	13
Net earnings attributable to Walgreens Boots Alliance, Inc.	$ 821	$ 1,054
Net earnings per common share:
Basic (in dollars per share)	$ 0.82	$ 0.97
Diluted (in dollars per share)	0.81	0.97
Dividends declared per share (in dollars per share)	$ 0.4000	$ 0.375
Weighted average common shares outstanding:
Basic (in shares)	1,006.1	1,082.1
Diluted (in shares)	1,011.1	1,088.3