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Fair Value Measurements - Schedule of Significant Financial Instruments not Measured at Fair Value (Details) - USD ($)
$ in Millions
Apr. 30, 2016
Jan. 30, 2016
May. 02, 2015
Carrying Amount      
Financial Instruments, Balance Sheet Groupings      
Debt $ 13,280 $ 11,859 $ 11,878
Fair Value      
Financial Instruments, Balance Sheet Groupings      
Debt $ 14,974 $ 13,385 $ 13,542