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New Accounting Pronouncement Share-based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 29, 2017
Apr. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Income Tax Expense (Benefit) $ 24 $ 81
Net Cash Provided by (Used for) Operating Activities 7 (43)
Accounting Standards Update 2016-09 [Member] | Adjustments for New Accounting Pronouncement [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Net Cash Provided by (Used for) Operating Activities   $ 71
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) $ 11