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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Feb. 03, 2019 | Jan. 28, 2018 | Jan. 29, 2017
Reconciliation of gross unrecognized tax benefits: |  |  |
Unrecognized tax benefits balance at beginning of fiscal year | $ 637 | $ 659 | $ 689
Additions based on tax positions related to the current year | 91 | 74 | 147
Additions for tax positions of prior years | 100 | 15 | 14
Reductions for tax positions of prior years | (245) | (93) | (161)
Reductions due to settlements | (66) | (1) | (16)
Reductions due to lapse of statute of limitations | (23) | (17) | (14)
Unrecognized tax benefits balance at end of fiscal year | $ 494 | $ 637 | $ 659

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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