Condensed Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Oct. 29, 2016	Oct. 31, 2015
Income Statement [Abstract]
Sales	$ 1,186.2			$ 1,216.4			$ 4,138.5	$ 4,157.6
Cost of sales	(836.2)			(848.7)			(2,723.2)	(2,733.2)
Gross margin	350.0			367.7			1,415.3	1,424.4
Selling, general and administrative expenses	(386.5)			(395.0)			(1,264.9)	(1,301.0)
Other operating income, net	68.6			60.9			213.6	187.2
Operating income	32.1			33.6			364.0	310.6
Interest expense, net	(12.7)			(11.7)			(36.4)	(33.8)
Income before income taxes	19.4			21.9			327.6	276.8
Income taxes	(2.4)			(6.9)			(81.9)	(80.8)
Net income	17.0			15.0			245.7	196.0
Dividends on redeemable convertible preferred shares	(2.2)			0.0			(2.2)	0.0
Net income attributable to common shareholders	$ 14.8			$ 15.0			$ 243.5	$ 196.0
Earnings per common share:
Earnings per share: basic (usd per share)	$ 0.20			$ 0.19			$ 3.19	$ 2.46
Earnings per share: diluted (usd per share)	$ 0.20			$ 0.19			$ 3.18	$ 2.45
Weighted average common shares outstanding:
Weighted average common shares outstanding: basic (shares)	73.5			79.3			76.4	79.7
Weighted average common shares outstanding: diluted (shares)	73.6			79.5			76.5	79.9
Dividends declared per common share (usd per share)	$ 0.26	$ 0.26	$ 0.26	$ 0.22	$ 0.22	$ 0.22	$ 0.78	$ 0.66