Financial Instruments (Details) - USD ($) $ in Millions		3 Months Ended
		Nov. 30, 2016	Nov. 30, 2015	Aug. 31, 2016
Effect of Fair Value Hedges on Results of Operations [Abstract]
Cumulative fair value adjustments resulted in increase in long-term debt		$ 1		$ 2
Interest Rate Swaps [Member] | Six-month LIBOR [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Fair Value		$ 250
Fixed interest rate percentage		5.25%
Foreign Currency Forwards [Member] | Not Designated as Hedging Instrument [Member] | Selling, General and Administrative Expenses [Member]
Effect of Fair Value Hedges on Results of Operations [Abstract]
Gains and (losses) due to changes in fair value of derivative instruments		$ 50	$ (2)
Foreign Currency Forwards [Member] | Not Designated as Hedging Instrument [Member] | Other Income (Expense) [Member]
Effect of Fair Value Hedges on Results of Operations [Abstract]
Gains and (losses) due to changes in fair value of derivative instruments		1	$ 0
Other Non-Current Assets [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Notional Amount	[1]	250		250
Derivatives assets, Fair Value		0		3
Other Current Assets [Member] | Basis Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Notional Amount	[1]			2
Derivatives assets, Fair Value				1
Other Current Assets [Member] | Foreign Currency Forwards [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Notional Amount	[1]	786		1,177
Derivatives assets, Fair Value		11		16
Other Current Liabilities [Member] | Basis Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Notional Amount	[1]	2
Derivatives assets, Fair Value		1
Other Current Liabilities [Member] | Foreign Currency Forwards [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivatives assets, Notional Amount	[1]	304		41
Derivatives assets, Fair Value		$ 2		$ 0

[1] Amounts are presented in U.S. dollar equivalents, as applicable.