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Fair Value Measurements (Fair Value, Lease Guarantees On Recurring Basis, Unobservable Input) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Oct. 31, 2015 | Nov. 01, 2014 | Oct. 31, 2015 | Nov. 01, 2014
Fair Value Measurements [Abstract] |  |  |  |
Beginning Balance | $ 0 | $ 1 | $ 1 | $ 1
Change in Estimated Fair Value Reported in Earnings | 0 | 0 | (1) | 0
Ending Balance | $ 0 | $ 1 | $ 0 | $ 1

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- Definition Fair Value Measurements + References No definition available. + Details
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- Definition Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value portion of guarantee, including, but not limited to, financial standby letter of credit, fair value guarantee, guarantee of collection of scheduled contractual cash flows from financial assets, and contracts that contingently require the guarantor to make payments or perform services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12201-110248 + Details
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