CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings (loss)	$ (3,528)	$ 4,065	$ 2,512
Other comprehensive (loss) income, net of tax:
Pension/post-retirement obligations	(541)	203	389
Unrealized (loss) gain on cash flow hedges	(2)	7	21
Net investment hedges (loss) gain	(130)	248	(1)
Movement on available for sale debt securities	(2)	(95)	96
Share of other comprehensive income (loss) of equity method investments	122	(226)	(18)
Currency translation adjustments	377	(865)	1,182
Total other comprehensive (loss) income	(176)	(728)	1,669
Total comprehensive (loss) income	(3,704)	3,337	4,181
Comprehensive loss attributable to non-controlling interests	(435)	(303)	(25)
Comprehensive (loss) income attributable to Walgreens Boots Alliance, Inc.	$ (3,269)	$ 3,640	$ 4,205