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Related parties (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Related parties (Details) - USD ($) $ in Millions	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024	Mar. 06, 2025	Aug. 31, 2024
Subsequent Event \| 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	$ 19,077	$ 17,804	$ 39,116	$ 36,114
Trade accounts payable, net of receivables	$ 9,006		$ 9,006			$ 9,259