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Supplemental information - Depreciation and Amortization Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Supplemental Cash Flow Elements [Abstract]    
Depreciation expense $ 335 $ 342
Intangible asset and other amortization 165 95
Total depreciation and amortization expense $ 500 $ 437