CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Income Statement [Abstract]
Sales	$ 147,658	$ 139,081	$ 132,703
Cost of sales	121,134	112,009	104,437
Gross profit	26,524	27,072	28,265
Selling, general and administrative expenses	28,113	34,205	27,295
Impairment of goodwill	12,701	0	0
Equity earnings in Cencora	213	252	418
Operating (loss) income	(14,076)	(6,882)	1,387
Other income, net	340	2,043	2,998
(Loss) earnings before interest and income tax provision (benefit)	(13,736)	(4,839)	4,385
Interest expense, net	482	580	400
(Loss) earnings before income tax provision (benefit)	(14,219)	(5,419)	3,985
Income tax provision (benefit)	1,246	(1,858)	(30)
Post-tax earnings from other equity method investments	17	33	50
Net earnings (loss)	(15,448)	(3,528)	4,065
Net loss attributable to non-controlling interests	(6,812)	(448)	(271)
Net (loss) earnings attributable to Walgreens Boots Alliance, Inc.	$ (8,636)	$ (3,080)	$ 4,337
Net (loss) earnings per common share:
Total (in dollars per share)	$ (10.01)	$ (3.57)	$ 5.02
Earnings Per Share, Diluted [Abstract]
Total (in dollars per share)	$ (10.01)	$ (3.57)	$ 5.01
Weighted average common shares outstanding:
Basic (in shares)	863.1	863.2	864.4
Diluted (in shares)	863.1	863.2	865.9