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Fair Value Measurements (Details 2) (USD $) In Millions, unless otherwise specified | May 02, 2015 | Jan. 31, 2015 | May 03, 2014
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Carrying Amount |  |  |  |  |  |
Financial liabilities |  |  |  |  |  |
Debt | $ 11,947 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | [1],[2] | $ 11,946 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | [1],[2] | $ 12,064 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember | [1],[2]
Fair Value |  |  |  |  |  |
Financial liabilities |  |  |  |  |  |
Debt | $ 13,542 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | [1],[2] | $ 14,089 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | [1],[2] | $ 13,721 us-gaap_DebtInstrumentFairValue / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | [1],[2]
[1] | The carrying amounts of certain other current assets, accounts payable, and certain accrued and other current liabilities approximate fair value due to their short-term nature.
[2] | The carrying amount and estimated fair value of debt exclude unamortized swap valuation adjustments and capital lease obligations.

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13476-108611 + Details
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