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Fair Value Measurements (Fair Value Measurements on a Recurring Basis) (Details) - Recurring - USD ($)
$ in Millions
Feb. 28, 2022
Aug. 31, 2021
Level 1 | Cash equivalents    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash equivalents $ 5 $ 36
Level 1 | Prepaid expenses and other current assets    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term investments 17 18
Level 2 | Prepaid expenses and other current assets | Designated as Hedging Instruments | Foreign exchange contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative asset 18 9
Level 2 | Prepaid expenses and other current assets | Not Designated as Hedging Instruments | Foreign exchange contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative asset 46 20
Level 2 | Other assets | Designated as Hedging Instruments | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative asset 15 9
Level 2 | Accrued expenses | Designated as Hedging Instruments | Foreign exchange contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liability 2 6
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Foreign exchange contracts    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liability 9 9
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liability 0 3
Extended interest rate swap not designated as a hedging instrument 0 10
Level 2 | Other liabilities | Designated as Hedging Instruments | Interest rate swaps    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liability $ 3 $ 7