v3.8.0.1
Employee Benefit Plans - Weighted Average Assumptions Used to Calculate Fair Value Awards for Employee Stock Purchase Plan (Details) - Employee Stock Purchase Plan - $ / shares
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Estimated fair value (in usd per share) $ 6.03 $ 3.83 $ 3.24
Expected volatility (as a percent) 30.00% 39.00% 41.00%
Expected term (in years) 1 year 2 months 12 days 1 year 2 months 12 days 1 year 3 months 18 days
Risk-free interest rate (as a percent) 1.60% 0.70% 0.60%
Expected dividend yield (as a percent) 1.10% 1.90% 2.40%