CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Income Statement [Abstract]
Sales	$ 33,756	$ 32,779	$ 67,656	$ 64,217
Cost of sales	26,047	25,998	52,374	50,806
Gross profit	7,708	6,781	15,283	13,411
Selling, general and administrative expenses	6,565	6,029	12,956	11,820
Equity earnings (loss) in AmerisourceBergen	103	80	202	(1,293)
Operating income	1,246	832	2,529	298
Other (expense) income	(198)	251	2,418	313
Earnings before interest and tax	1,047	1,083	4,947	611
Interest expense, net	100	137	186	272
Earnings before tax	947	946	4,761	339
Income tax provision (benefit)	172	42	447	(165)
Post tax earnings from other equity method investments	31	13	24	29
Net earnings from continuing operations	806	918	4,337	532
Net earnings from discontinued operations	0	107	0	194
Net earnings	806	1,025	4,337	726
Net (loss) earnings attributable to non-controlling interests - continuing operations	(78)	(4)	(126)	1
Net earnings attributable to non-controlling interests - discontinued operations	0	3	0	7
Net earnings attributable to Walgreens Boots Alliance, Inc.	883	1,026	4,463	718
Net earnings attributable to Walgreens Boots Alliance, Inc.:
Continuing operations	883	922	4,463	531
Discontinued operations	0	104	0	187
Total	$ 883	$ 1,026	$ 4,463	$ 718
Basic net earnings per common share:
Continuing operations (in dollars per share)	$ 1.02	$ 1.07	$ 5.16	$ 0.61
Discontinued operations (in dollars per share)	0	0.12	0	0.22
Total (in dollars per share)	1.02	1.19	5.16	0.83
Diluted net earnings per common share:
Continuing operations (in dollars per share)	1.02	1.06	5.15	0.61
Discontinued operations (in dollars per share)	0	0.12	0	0.22
Total (in dollars per share)	$ 1.02	$ 1.19	$ 5.15	$ 0.83
Weighted average common shares outstanding:
Basic (in shares)	863.5	864,200.0	864.6	864.7
Diluted (in shares)	865.2	865.6	866.4	865.7