Related parties (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024	Mar. 06, 2025	Aug. 31, 2024
Walgreens Boots Alliance, Inc. | Stefano Pessina
Related Party Transaction [Line Items]
Equity ownership, excluding consolidated entity and equity method investee, percentage					17.00%
Related Party | Cencora
Related Party Transaction [Line Items]
Purchases, net	$ 19,727	$ 18,181	$ 58,843	$ 54,296
Trade accounts payable, net of receivables	$ 8,943		$ 8,943			$ 9,259