Supplemental information - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021	Aug. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable from related party	$ 1,200			$ 1,100
Accumulated depreciation and amortization on property, plant, and equipment	13,500			13,100
Redeemable non-controlling interest	$ 812		$ 2,787	319
Antidilutive securities excluded from EPS calculations (in shares)	17.9	17.1
Trade Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables	$ 4,100			$ 4,500