Earnings (loss) per common share ("EPS") - Schedule of Antidilutive Securities Excluded From the Calculation of Earnings Per Share (Details) - shares shares in Millions	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from the calculation of earnings per share	8.2	0.4	0.1
Performance Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from the calculation of earnings per share	1.1	0.4	0.1
Series A Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from the calculation of earnings per share	7.1	0.0	0.0