Share-Based Compensation - Summary of Activity of Awards Granted under Share Saving Plan (Details) - Saving Share Plans - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance (shares)	0.3
Granted (shares)	0.1
Exercised (shares)	0.0
Lapsed (shares)	(0.1)
Ending Balance (shares)	0.3	0.3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning Balance (usd per share)	$ 74.30
Granted (usd per share)	52.00
Exercised (usd per share)	46.55
Lapsed (usd per share)	82.91
Ending Balance (usd per share)	$ 62.80	$ 74.30
Weighted average remaining contractual life	1 year 9 months 24 days	1 year 11 months 24 days
Intrinsic value	$ 0.0	$ 3.0
Shares Exercisable (shares)	0.0	0.0
Weighted Average Exercise Price, Shares Exercisable (usd per share)	$ 0.00	$ 0.00
Intrinsic Value, Shares Exercisable	$ 0.0	$ 0.0