Annual report pursuant to Section 13 and 15(d)

Summary of significant accounting policies - Fiscal Year (Details)

v3.19.1
Summary of significant accounting policies - Fiscal Year (Details)
 3 Months Ended 12 Months Ended
Feb. 02, 2019
Nov. 03, 2018
Aug. 04, 2018
May 05, 2018
Feb. 03, 2018
Oct. 28, 2017
Jul. 29, 2017
Apr. 29, 2017
Feb. 02, 2019
Feb. 03, 2018
Jan. 28, 2017
Summary of significant accounting policies                      
Fiscal period 91 days 91 days 91 days 91 days 98 days 91 days 91 days 91 days 364 days 371 days 364 days
Minimum                      
Summary of significant accounting policies                      
Fiscal period                 364 days    
Maximum                      
Summary of significant accounting policies                      
Fiscal period                 371 days