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Accumulated Other Comprehensive Income - Reclassification from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Feb. 28, 2023
Feb. 28, 2022
Feb. 28, 2023
Feb. 28, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Cost of revenue $ 7,473 $ 6,944 $ 16,365 $ 14,836
Interest expense 72 33 133 66
Other expense (income) 17 (4) 32 (3)
Total amounts reclassified from AOCI (207) (222) (430) (463)
Loss to be reclassified in next 12 months (less than)     1  
Reclassification out of AOCI        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Total amounts reclassified from AOCI (2) (9) 39 (11)
Reclassification out of AOCI | Realized losses (gain) on derivative instruments | Foreign exchange contracts        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Cost of revenue 1 (6) 44 (5)
Reclassification out of AOCI | Realized losses (gain) on derivative instruments | Interest rate contracts        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Interest expense 0 1 0 2
Reclassification out of AOCI | Actuarial gain        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Other expense (income) (4) (5) (7) (10)
Reclassification out of AOCI | Prior service cost        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Other expense (income) $ 1 $ 1 $ 2 $ 2