CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Nov. 30, 2021	Nov. 30, 2020
Income Statement [Abstract]
Sales	$ 33,901	$ 31,438
Cost of sales	26,326	24,808
Gross profit	7,574	6,630
Selling, general and administrative expenses	6,391	5,792
Equity earnings (loss) in AmerisourceBergen	100	(1,373)
Operating income (loss)	1,283	(535)
Other income	2,617	63
Earnings (loss) before interest and tax	3,900	(472)
Interest expense, net	86	136
Earnings (loss) before tax	3,814	(607)
Income tax provision (benefit)	275	(207)
Post tax (loss) earnings from other equity method investments	(7)	15
Net earnings (loss) from continuing operations	3,531	(385)
Net earnings from discontinued operations	0	87
Net earnings (loss)	3,531	(299)
Net (loss) earnings attributable to noncontrolling interests - continuing operations	(48)	5
Net earnings attributable to noncontrolling interests - discontinued operations	0	4
Net earnings (loss) attributable to Walgreens Boots Alliance, Inc.	3,580	(308)
Net earnings (loss) attributable to Walgreens Boots Alliance, Inc.:
Continuing operations	3,580	(391)
Discontinued operations	0	83
Total	$ 3,580	$ (308)
Basic net earnings (loss) per common share:
Continuing operations (in dollars per share)	$ 4.13	$ (0.45)
Discontinued operations (in dollars per share)	0	0.10
Total (in dollars per share)	4.13	(0.36)
Diluted net earnings (loss) per common share:
Continuing operations (in dollars per share)	4.13	(0.45)
Discontinued operations (in dollars per share)	0	0.10
Total (in dollars per share)	$ 4.13	$ (0.36)
Weighted average common shares outstanding:
Basic (in shares)	865.8	865.3
Diluted (in shares)	867.6	865.3