Debt - Extinguishment of Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 05, 2015	Feb. 27, 2014	Mar. 05, 2015		Feb. 27, 2014
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			$ 723
Debt Instrument, Increase (Decrease), Net			482
Cash, Increase (Decrease), Net Change As A Result Of Debt Restructure Activities			334
Debt Instrument, Decrease in Equity			(106)
(Loss) gain on restructure of debt	0	(80)	(30)		(155)
Convertible Notes Payable [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(120)
Debt Instrument, Increase (Decrease), Net			(368)
Repayments to Settle Long-term Debt Obligations, Gross			(407)
Debt Instrument, Decrease in Equity			(14)
Volume-weighted-average price of our common stock period of consecutive trading days (in days)			20
Interest and debt expense incurred through restructure of debt					112
Face value of debt extinguished					351
Convertible Notes Payable [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(36)
Extinguishment of debt carrying amount			(30)
Repayments to Settle Long-term Debt Obligations, Gross			(125)
Debt Instrument, Decrease in Equity			(92)
Face value of debt extinguished					164
Convertible Notes Payable [Member] | Exchanged [Member]
Extinguishment of Debt [Line Items]
Interest and debt expense incurred through restructure of debt					49
Face value of debt extinguished					440
Convertible Notes Payable [Member] | 2031B convertible senior notes [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(114)
Debt Instrument, Increase (Decrease), Net			(362)
Repayments to Settle Long-term Debt Obligations, Gross			(389)
Debt Instrument, Decrease in Equity			0
Convertible Notes Payable [Member] | 2032C convertible senior notes [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(5)
Extinguishment of debt carrying amount			(4)
Repayments to Settle Long-term Debt Obligations, Gross			(18)
Debt Instrument, Decrease in Equity			(13)
Convertible Notes Payable [Member] | 2032D convertible senior notes [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(31)
Extinguishment of debt carrying amount			(26)
Repayments to Settle Long-term Debt Obligations, Gross			(107)
Debt Instrument, Decrease in Equity			(79)
Convertible Notes Payable [Member] | 2033E convertible senior notes [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(6)
Debt Instrument, Increase (Decrease), Net			(6)
Repayments to Settle Long-term Debt Obligations, Gross			(18)
Debt Instrument, Decrease in Equity			(14)
Corporate bonds [Member] | 2023 senior notes [Member] | Debt Issuance [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			1,000
Debt Instrument, Increase (Decrease), Net			1,000
Proceeds from Debt, Net of Issuance Costs			988
Debt Instrument, Decrease in Equity			0
Notes Payable, Other Payables [Member] | Prepayment [Member]
Extinguishment of Debt [Line Items]
Debt Instrument, Increase (Decrease), Net Principal			(121)
Extinguishment of debt carrying amount			(120)
Repayments to Settle Long-term Debt Obligations, Gross			(122)
Debt Instrument, Decrease in Equity			0
Other Non-Operating Income Expense Net [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(30)	[1]
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(22)	[1]
Interest and debt expense incurred through restructure of debt					106
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(3)	[1]
Interest and debt expense incurred through restructure of debt					11
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | Exchanged [Member]
Extinguishment of Debt [Line Items]
Interest and debt expense incurred through restructure of debt					38
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2031B convertible senior notes [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(24)	[1]
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2032C convertible senior notes [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(1)	[1]
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2032D convertible senior notes [Member] | Repurchase [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(2)	[1]
Other Non-Operating Income Expense Net [Member] | Convertible Notes Payable [Member] | 2033E convertible senior notes [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			2	[1]
Other Non-Operating Income Expense Net [Member] | Corporate bonds [Member] | 2023 senior notes [Member] | Debt Issuance [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			0	[1]
Other Non-Operating Income Expense Net [Member] | Notes Payable, Other Payables [Member] | Prepayment [Member]
Extinguishment of Debt [Line Items]
(Loss) gain on restructure of debt			(5)	[1]
Interest Expense [Member] | Convertible Notes Payable [Member] | Conversion And Settlement [Member]
Extinguishment of Debt [Line Items]
Interest and debt expense incurred through restructure of debt					6
Interest Expense [Member] | Convertible Notes Payable [Member] | Exchanged [Member]
Extinguishment of Debt [Line Items]
Interest and debt expense incurred through restructure of debt					$ 11

[1] Included in other non-operating expense.