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Summary of Significant Accounting Policies - Restricted Assets (Details) - USD ($) $ in Millions | Jan. 28, 2017 | Jan. 30, 2016
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Accounting Policies [Abstract] |  |
Restricted Cash and Investments | $ 193 | $ 185

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. + References No definition available. + Details
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