Long Term Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jun. 18, 2011	Feb. 26, 2011
Long-term debt and capital lease obligations
Accounts Receivable Securitization Facility	$ 90	$ 90
Other	101	102
Net discount on debt, using an effective interest rate of 6.28% to 8.97%	(246)	(250)
Capital lease obligations	1,133	1,154
Total debt and capital lease obligations	6,686	6,751
Less current maturities of long-term debt and capital lease obligations	(426)	(403)
Long-term debt and capital lease obligations	6,260	6,348
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate, Minimum	6.28%
Debt Instrument, Interest Rate, Maximum	8.97%
1.57% to 4.75% Revolving Credit Facility and Variable Rate Notes due June 2011 - April 2018 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	1,335	1,382
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate, Minimum	1.57%
Debt Instrument, Interest Rate, Maximum	4.75%
8.00% Notes due May 2016 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	1,000	1,000
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	8.00%
7.45% Debentures due August 2029 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	650	650
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.45%
7.50% Notes due November 2014 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	490	490
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.50%
6.34% to 7.15% Medium Term Notes due July 2012 - June 2028 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	440	440
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate, Minimum	6.34%
Debt Instrument, Interest Rate, Maximum	7.15%
8.00% Debentures due May 2031 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	400	400
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	8.00%
7.50% Notes due May 2012 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	300	300
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.50%
8.00% Debentures due June 2026 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	272	272
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	8.00%
8.70% Debentures due May 2030 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	225	225
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	8.70%
7.75% Debentures due June 2026 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	200	200
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.75%
7.25% Notes due May 2013 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	200	200
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.25%
7.90% Debentures due May 2017 [Member]
Long-term debt and capital lease obligations
Long Term Debentures and Notes due	$ 96	$ 96
Long-Term Debt (Textuals) [Abstract]
Debt Instrument, Interest Rate	7.90%

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Debt and capital lease obligations current and noncurrent.

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Long-term debt.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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-Article 7
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-Paragraph 16

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Interest rate stated in the contractual debt agreement.

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When presenting a range of interest rates, the highest stated (contractual) rate for funds borrowed under the debt agreement as of the balance sheet date.

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When presenting a range of interest rates, the lowest stated (contractual) rate for funds borrowed under the debt agreement as of the balance sheet date.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

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Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

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Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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-Name Regulation S-X (SX)
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