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Fixed interest rate related to the interest rate derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Financial Instruments (Details) - USD ($) $ in Millions	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016	Aug. 31, 2016
Interest rate swaps \| Six-month LIBOR
Derivatives, Fair Value [Line Items]
Fair Value	$ 250		$ 250
Fixed interest rate percentage	5.25%		5.25%
Foreign currency forwards \| Not Designated as Hedging Instrument \| Selling, general and administrative expense
Effect of Fair Value Hedges on Results of Operations [Abstract]
Gains and (losses) due to changes in fair value of derivative instruments	$ (2)	$ (23)	$ 47	$ (25)
Foreign currency forwards \| Not Designated as Hedging Instrument \| Other income (expense)
Effect of Fair Value Hedges on Results of Operations [Abstract]
Gains and (losses) due to changes in fair value of derivative instruments	(15)	$ 33	(14)	$ 33
Other non-current liabilities \| Interest rate swaps \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	250		250		$ 0
Fair Value	1		1		0
Other non-current liabilities \| Interest rate swaps \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	0		0		250
Fair Value	0		0		3
Other current assets \| Foreign currency forwards \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	253		253		1,177
Fair Value	2		2		16
Other current assets \| Basis swaps \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	0		0		2
Fair Value	0		0		1
Other current liabilities \| Foreign currency forwards \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	1,052		1,052		41
Fair Value	11		11		0
Other current liabilities \| Basis swaps \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional	2		2		0
Fair Value	$ 1		$ 1		$ 0