CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Income Statement [Abstract]
Sales	$ 139,081	$ 132,703	$ 132,509
Cost of sales	112,009	104,437	104,442
Gross profit	27,072	28,265	28,067
Selling, general and administrative expenses	34,205	27,295	24,586
Equity earnings (loss) in Cencora	252	418	(1,139)
Operating (loss) income	(6,882)	1,387	2,342
Other income, net	2,043	2,998	558
(Loss) earnings before interest and income tax (benefit) provision	(4,839)	4,385	2,900
Interest expense, net	580	400	905
(Loss) earnings before income tax (benefit) provision	(5,419)	3,985	1,995
Income tax (benefit) provision	(1,858)	(30)	667
Post-tax earnings from other equity method investments	33	50	627
Net (loss) earnings from continuing operations	(3,528)	4,065	1,955
Net earnings from discontinued operations	0	0	557
Net (loss) earnings	(3,528)	4,065	2,512
Net loss attributable to non-controlling interests - continuing operations	(448)	(271)	(39)
Net earnings attributable to non-controlling interests - discontinued operations	0	0	9
Net Income (Loss) Attributable to Parent, Total	(3,080)	4,337	2,542
Net (loss) earnings attributable to Walgreens Boots Alliance, Inc.:
Continuing operations	(3,080)	4,337	1,994
Discontinued operations	$ 0	$ 0	$ 548
Basic net (loss) earnings per common share:
Continuing operations (in dollars per share)	$ (3.57)	$ 5.02	$ 2.31
Discontinued operations (in dollars per share)	0	0	0.63
Total (in dollars per share)	(3.57)	5.02	2.94
Diluted net (loss) earnings per common share:
Continuing operations (in dollars per share)	(3.57)	5.01	2.30
Discontinued operations (in dollars per share)	0	0	0.63
Total (in dollars per share)	$ (3.57)	$ 5.01	$ 2.93
Weighted average common shares outstanding:
Basic (in shares)	863.2	864.4	864.8
Diluted (in shares)	863.2	865.9	866.4