Equity - Capped Calls (Details) (Call Option [Member], Convertible Debt [Member], USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	May 29, 2014 2031A and 2031B convertible senior notes [Member]	May 29, 2014 Purchased options [Member]	May 29, 2014 Purchased options [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] Maximum [Member]		May 29, 2014 Purchased options [Member] 2031A and 2031B convertible senior notes [Member]	May 29, 2014 Purchased options [Member] 2031A and 2031B convertible senior notes [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] 2031A and 2031B convertible senior notes [Member] Maximum [Member]		May 29, 2014 Purchased options [Member] 2032C convertible senior notes [Member]	May 29, 2014 Purchased options [Member] 2032C convertible senior notes [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] 2032C convertible senior notes [Member] Maximum [Member]		May 29, 2014 Purchased options [Member] 2032D convertible senior notes [Member]	May 29, 2014 Purchased options [Member] 2032D convertible senior notes [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] 2032D convertible senior notes [Member] Maximum [Member]		May 29, 2014 Purchased options [Member] 2033E convertible senior notes [Member]	May 29, 2014 Purchased options [Member] 2033E convertible senior notes [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] 2033E convertible senior notes [Member] Maximum [Member]		May 29, 2014 Purchased options [Member] 2033F convertible senior note [Member]	May 29, 2014 Purchased options [Member] 2033F convertible senior note [Member] Minimum [Member]		May 29, 2014 Purchased options [Member] 2033F convertible senior note [Member] Maximum [Member]
Option Indexed to Issuer's Equity [Line Items]
Option indexed to issuer's equity, strike price (in dollars per share)							9.50					9.80					10.16					10.93					10.93
Option Indexed to Issuer's Equity, stated cap price (in dollars per share)								$ 12.67		$ 13.17			$ 14.26		$ 15.69			$ 14.62		$ 16.04			$ 14.51		$ 14.51			$ 14.51		$ 14.51
Option Indexed to Issuer's Equity, Underlying Common Shares		188					34					56					44					27					27
Option Indexed To Issuers Equity Settlement Proceeds			$ 0	[1]	$ 864,000,000	[1]		$ 0	[1]	$ 117,000,000	[1]		$ 0	[1]	$ 307,000,000	[1]		$ 0	[1]	$ 244,000,000	[1]		$ 0	[1]	$ 98,000,000	[1]		$ 0	[1]	$ 98,000,000	[1]
Capped call fair value settlement, shares received (in shares)							3
Capped call fair value settlement, dollar value of shares received							$ 86,000,000
Capped call settlement (treasury) shares retired (in shares)	3

[1] Settlement in cash on the respective expiration dates would result in us receiving an amount ranging from zero, if the market price per share of our common stock is at or below the low strike price, to the maximum amount if the market price per share of our common stock is at or above the high cap price. If share settlement were elected, the number of shares received would be determined by the value of the capped calls at the time of settlement divided by the share price on the settlement date. Settlement of the capped calls prior to the expiration dates may be for an amount less than the maximum value at expiration.