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New Accounting Pronouncement Share-based Compensation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 29, 2017 | Jul. 30, 2016 | Jul. 29, 2017 | Jul. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Income Tax Expense (Benefit) | $ 78 | $ 128 | $ 103 | $ 208
Net Cash Provided by Operating Activities |  |  | 221 | 508
Adjustments for New Accounting Pronouncement [Member] | Accounting Standards Update 2016-09 [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Net Cash Provided by Operating Activities |  |  |  | $ 87
Accounting Standards Update 2016-09 [Member] | Adjustments for New Accounting Pronouncement [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Income Tax Expense (Benefit) | $ 2 |  | $ 13 |

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