Financing (Interest Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Feb. 02, 2013	Apr. 28, 2012	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Debt Disclosure [Abstract]
Interest on debt			$ 411us-gaap_InterestExpenseDebt	$ 407us-gaap_InterestExpenseDebt	$ 449us-gaap_InterestExpenseDebt
Amortization of debt premium			(12)	(15)	(19)
Amortization of financing costs			7us-gaap_AmortizationOfFinancingCosts	7us-gaap_AmortizationOfFinancingCosts	7us-gaap_AmortizationOfFinancingCosts
Interest on capitalized leases			2	2	3
Interest expense, gross			408us-gaap_FinancingInterestExpense	401us-gaap_FinancingInterestExpense	440us-gaap_FinancingInterestExpense
Less interest capitalized on construction			13us-gaap_InterestCostsCapitalized	11us-gaap_InterestCostsCapitalized	15us-gaap_InterestCostsCapitalized
Interest Expense, Total			395us-gaap_InterestExpense	390us-gaap_InterestExpense	425us-gaap_InterestExpense
Premium on early retirement of long-term debt	$ 133	$ 4	$ 17	$ 0	$ 137

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

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The financing charge for leasing arrangements meeting the criteria for capitalization.

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This element represents interest incurred for borrowed money which was used to produce goods or render services.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of interest capitalized during the period.

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-Glossary Allowance for Funds Used during Construction

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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