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Accumulated Other Comprehensive Income (Reclassification from AOCI) (Details) - USD ($)
$ in Millions
 3 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Cost of revenue $ (7,892) $ (7,198)
Interest expense (33) (32)
Other expense (income) (1) 1
Income before income tax 317 285
Loss to be reclassified in next 12 months 7  
Reclassification out of AOCI    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Income before income tax (2) (16)
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 (17)
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 1 1
Reclassification out of AOCI | Actuarial gain    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Other expense (income) 5 0
Reclassification out of AOCI | Prior service cost    
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]    
Other expense (income) $ (1) $ 0