NET INCOME (LOSS) PER SHARE Schedule of Earnings per share, basic and diluted (table details) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Earnings Per Share [Abstract]
Net income	$ 81.9	$ 133.0	$ 53.4	$ 392.7
Weighted Average Number of Shares Outstanding (shares)	234.7	205.6	218.4	206.1
Basic net income per share (usd per share)	$ 0.35	$ 0.65	$ 0.24	$ 1.91
Incremental Common Shares Attributable to Share-based Payment Arrangements	1.0	1.0	1.0	0.9
Weighted average number of shares and dilutive potential shares outstanding (shares)	235.7	206.6	219.4	207.0
Diluted net income per share (usd per share)	$ 0.35	$ 0.64	$ 0.24	$ 1.90