Fair Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities Measured at Fair Value) (Details) - Recurring - USD ($) $ in Millions	Aug. 31, 2021	Aug. 31, 2020
Level 1 | Cash and cash equivalents
Assets:
Cash equivalents	$ 36	$ 34
Level 1 | Prepaid expenses and other current assets
Assets:
Short-term investments	18	17
Level 2 | Prepaid expenses and other current assets | Designated as Hedging Instruments | Forward foreign exchange contracts
Assets:
Derivative asset	9	11
Level 2 | Prepaid expenses and other current assets | Not Designated as Hedging Instruments | Forward foreign exchange contracts
Assets:
Derivative asset	20	59
Level 2 | Accrued expenses | Designated as Hedging Instruments | Forward foreign exchange contracts
Liabilities:
Derivative liability	6	2
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Forward foreign exchange contracts
Liabilities:
Derivative liability	9	9
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Interest rate swaps
Liabilities:
Derivative liability	3	1
Level 2 | Accrued expenses | Not Designated as Hedging Instruments | Extended Interest Rate Swap
Liabilities:
Extended interest rate swap not designated as a hedging instrument	10	26
Level 2 | Other liabilities | Designated as Hedging Instruments | Interest rate swaps | Forward contracts
Liabilities:
Derivative liability	7	0
Level 2 | Other liabilities | Not Designated as Hedging Instruments
Liabilities:
Extended interest rate swap not designated as a hedging instrument	0	13
Level 2 | Other assets | Designated as Hedging Instruments | Interest rate swaps
Assets:
Derivative asset	$ 9	$ 0