Earnings Per Share, Basic And Diluted (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013
Earnings Per Share [Abstract]
Net (loss) income	$ (1.3)	$ 33.6	$ 153.3	$ 192.8
Basic weighted average number of shares outstanding	79.9	79.9	79.9	80.4
Dilutive effect of share awards		0.4	0.3	0.4
Diluted weighted average number of shares outstanding	79.9	80.3	80.2	80.8
(Loss) earnings per share - basic	$ (0.02)	$ 0.42	$ 1.92	$ 2.40
(Loss) earnings per share - diluted	$ (0.02)	$ 0.42	$ 1.91	$ 2.39