Condensed Consolidated Statements Of Shareholders' Equity (Unaudited) - 9 months ended Oct. 28, 2017 - USD ($) $ in Millions	Total	Common shares at par value	Additional paid-in capital	Other reserves	Treasury shares	Retained earnings	Accumulated other comprehensive loss
Beginning Balance at Jan. 28, 2017	$ 2,490.2	$ 15.7	$ 280.7	$ 0.4	$ (1,494.8)	$ 3,995.9	$ (307.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	168.0					168.0
Other comprehensive income	15.3						15.3
Dividends on common shares	(58.7)					(58.7)
Dividends on redeemable convertible preferred shares	(24.6)					(24.6)
Repurchase of common shares	(460.0)				(460.0)
Net settlement of equity based awards	(2.4)		(6.1)		9.4	(5.7)
Share options exercised	0.2				0.2
Share-based compensation expense	11.0		11.0
Ending Balance at Oct. 28, 2017	$ 2,139.0	$ 15.7	$ 285.6	$ 0.4	$ (1,945.2)	$ 4,074.9	$ (292.4)