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Summary of Significant Accounting Policies - Cash & Cash Equivalents (Details) - USD ($) $ in Millions | 12 Months Ended
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Jan. 28, 2017 | Jan. 30, 2016
Accounting Policies [Abstract] |  |
Maximum Term of Original Maturity to Classify an Instrument as Cash Equivalents |  | 3 months
Cash Equivalents, at Carrying Value | $ 1,531 | $ 1,208
Weighted Average Interest Rate on Cash Equivalents | 0.50% | 0.50%

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- Definition This element represents the weighted-average interest rate on cash equivalents. + References No definition available. + Details
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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