Annual report pursuant to Section 13 and 15(d)

Share-based awards - Assumptions to Estimate Fair Value of Stock Options (Details)

v3.8.0.1
Share-based awards - Assumptions to Estimate Fair Value of Stock Options (Details) - Stock options
12 Months Ended
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Weighted-average assumptions to estimate fair value      
Volatility rate (as a percent) 30.90% 35.00% 37.90%
Average risk-free interest rate (as a percent) 1.60% 1.20% 1.60%
Average expected life 3 years 6 months 3 years 6 months 4 years 10 months 24 days
Dividend yield (as a percent) 0.00% 0.00% 0.00%