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Employee Benefit Plans (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Jan. 28, 2018
Jan. 29, 2017
Jan. 31, 2016
Retirement Benefits [Abstract]      
Contributions to the Benefit Plans and the Restoration Plan $ 202 $ 195 $ 186
Common stock shares held in trust for plan participants 7