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Debt and Credit Facilities Long Term Debt (Details) - USD ($)
$ in Millions
Jul. 29, 2017
Jan. 28, 2017
Jul. 30, 2016
Debt Instrument [Line Items]      
Notes $ 1,248 $ 1,248 $ 1,248
Japan Term Loan 0 65 97
Total debt 1,248 1,313 1,345
Less: Current portion of Japan Term Loan 0 (65) (24)
Total long-term debt $ 1,248 $ 1,248 $ 1,321