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Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 28, 2017
Jan. 31, 2015
Jan. 30, 2016
Income Tax Examination [Line Items]      
Income Tax Examination, Penalties and Interest Accrued $ 29   $ 23
Income Tax Examination, Penalties and Interest Expense 6 $ 2  
Unrecognized tax benefits that would impact effective tax rate 110   101
Income Taxes Receivable, Current $ 27   $ 26