Debt - Schedule of Long-term Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 01, 2011	Dec. 02, 2010	Sep. 01, 2011
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 2,119		$ 2,001
Less current portion	(146)		(140)
Long-term debt	1,973		1,861
Proceeds from equipment sale-leaseback transactions	110	0
Convertible senior notes due June 2014 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	826		815
Stated interest rate (in hundredths)	1.875%		1.875%
Effective interest rate (in hundredths)	7.90%		7.90%
Discount	123		134
Due date	Jun. 30, 2014
Capital lease obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	525		423
Effective interest rate (in hundredths)	5.60%		6.10%
Due date	Aug. 31, 2050
Convertible senior notes due August 2031A [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	257		255
Stated interest rate (in hundredths)	1.50%		1.50%
Effective interest rate (in hundredths)	6.50%		6.50%
Discount	88		90
Due date	Aug. 31, 2031
Convertible senior notes due August 2031B [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	236		234
Stated interest rate (in hundredths)	1.875%		1.875%
Effective interest rate (in hundredths)	7.00%		7.00%
Discount	109		111
Due date	Aug. 31, 2031
Convertible senior notes due October 2013 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	139		139
Stated interest rate (in hundredths)	4.25%		4.25%
Due date	Oct. 31, 2013
Convertible senior notes due June 2027 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	136		135
Stated interest rate (in hundredths)	1.875%		1.875%
Effective interest rate (in hundredths)	6.90%		6.90%
Discount	39		40
Due date	Jun. 30, 2027
Convertible debt due 2027, aggregate principal amount		175
Sales-leaseback transactions [Member]
Debt Instrument [Line Items]
Due date	Dec. 31, 2015
Proceeds from equipment sale-leaseback transactions	110
Long-term Debt, Gross, current period additions	$ 110
Imputed interest rate of sale leaseback additions (in hundredths)	4.30%