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Income Taxes (Accrued Interest and Penalties) (Details) - USD ($) $ in Millions | Jan. 28, 2018 | Jan. 29, 2017
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Income Tax Disclosure [Abstract] |  |
Accrued interest and penalties | $ 134 | $ 109

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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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