CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020
Income Statement [Abstract]
Sales	$ 132,703	$ 132,509	$ 121,982
Cost of sales	104,437	104,442	95,905
Gross profit	28,265	28,067	26,078
Selling, general and administrative expenses	27,295	24,586	25,436
Equity earnings (loss) in AmerisourceBergen	418	(1,139)	341
Operating income	1,387	2,342	982
Other income, net	2,998	558	77
Earnings before interest and income tax provision	4,385	2,900	1,060
Interest expense, net	400	905	613
Earnings before income tax provision	3,985	1,995	446
Income tax (benefit) provision	(30)	667	339
Post tax earnings from other equity method investments	50	627	31
Net earnings from continuing operations	4,065	1,955	138
Net earnings from discontinued operations	0	557	286
Net earnings	4,065	2,512	424
Net (loss) attributable to non-controlling interests - continuing operations	(271)	(39)	(42)
Net earnings attributable to non-controlling interests - discontinued operations	0	9	9
Net earnings attributable to Walgreens Boots Alliance, Inc.	4,337	2,542	456
Net earnings attributable to Walgreens Boots Alliance, Inc.:
Continuing operations	4,337	1,994	180
Discontinued operations	$ 0	$ 548	$ 277
Basic net earnings per common share:
Continuing operations (in dollars per share)	$ 5.02	$ 2.31	$ 0.20
Discontinued operations (in dollars per share)	0	0.63	0.31
Total (in dollars per share)	5.02	2.94	0.52
Diluted net earnings per common share:
Continuing operations (in dollars per share)	5.01	2.30	0.20
Discontinued operations (in dollars per share)	0	0.63	0.31
Total (in dollars per share)	$ 5.01	$ 2.93	$ 0.52
Weighted average common shares outstanding:
Basic (in shares)	864.4	864.8	879.4
Diluted (in shares)	865.9	866.4	880.3