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Share-Based Compensation - Summary of Activity for Market Performance Units (Details) - Market Performance RSUs
shares in Thousands
12 Months Ended
Jan. 27, 2019
$ / shares
shares
Number of Units  
Beginning balance (in shares) | shares 154
Performance units granted (in shares) | shares 0
Performance units vested (in shares) | shares (154)
Performance units cancelled/forfeited (in shares) | shares 0
Ending balance (in shares) | shares 0
Weighted Average Grant Date Fair Value (per share)  
Beginning balance (in dollars per share) | $ / shares $ 14.88
Weighted average fair value units granted (in dollars per share) | $ / shares 0.00
Performance units vested (in dollars per share) | $ / shares 14.88
Performance units cancelled/forfeited (in dollars per share) | $ / shares 0.00
Ending balance (in dollars per share) | $ / shares $ 0.00