Condensed Consolidated Statements Of Shareholders' Equity (Unaudited) - 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 Feb. 02, 2019	$ 1,201.6	$ 12.6	$ 236.5	$ 0.4	$ (1,027.3)	$ 2,282.2	$ (302.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10.0)					(10.0)
Other comprehensive income (loss)	(5.1)						(5.1)
Dividends declared: Common shares	(19.3)					(19.3)
Dividends declared: Preferred shares	(8.2)					(8.2)
Net settlement of equity-based awards	(1.6)		(7.8)		27.5	(21.3)
Share-based compensation expense	4.0		4.0
Ending Balance at May. 04, 2019	1,161.4	12.6	232.7	0.4	(999.8)	2,223.4	(307.9)
Beginning Balance at Feb. 02, 2019	1,201.6	12.6	236.5	0.4	(1,027.3)	2,282.2	(302.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(81.6)
Other comprehensive income (loss)	3.3
Dividends declared: Common shares	(58.0)
Ending Balance at Nov. 02, 2019	1,050.7	12.6	242.3	0.4	(984.8)	2,079.7	(299.5)
Beginning Balance at May. 04, 2019	1,161.4	12.6	232.7	0.4	(999.8)	2,223.4	(307.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(36.1)					(36.1)
Other comprehensive income (loss)	(14.4)						(14.4)
Dividends declared: Common shares	(19.3)					(19.3)
Dividends declared: Preferred shares	(8.2)					(8.2)
Net settlement of equity-based awards	0.5		(0.7)		6.8	(5.6)
Share-based compensation expense	4.3		4.3
Ending Balance at Aug. 03, 2019	1,088.2	12.6	236.3	0.4	(993.0)	2,154.2	(322.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(35.5)					(35.5)
Other comprehensive income (loss)	22.8						22.8
Dividends declared: Common shares	(19.4)					(19.4)
Dividends declared: Preferred shares	(8.2)					(8.2)
Net settlement of equity-based awards	(1.9)		1.3		8.2	(11.4)
Share-based compensation expense	4.7		4.7
Ending Balance at Nov. 02, 2019	1,050.7	12.6	242.3	0.4	(984.8)	2,079.7	(299.5)
Beginning Balance at Feb. 01, 2020	1,222.6	12.6	245.4	0.4	(984.9)	2,242.9	(293.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(197.1)					(197.1)
Other comprehensive income (loss)	(34.0)						(34.0)
Dividends declared: Common shares	0.0
Dividends declared: Preferred shares	(8.2)					(8.2)
Net settlement of equity-based awards	(0.9)		(0.4)		(0.3)	(0.2)
Share-based compensation expense	1.4		1.4
Ending Balance at May. 02, 2020	983.8	12.6	246.4	0.4	(985.2)	2,037.4	(327.8)
Beginning Balance at Feb. 01, 2020	1,222.6	12.6	245.4	0.4	(984.9)	2,242.9	(293.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(269.5)
Other comprehensive income (loss)	(20.6)
Dividends declared: Common shares	0.0
Ending Balance at Oct. 31, 2020	915.9	12.6	254.1	0.4	(980.4)	1,943.6	(314.4)
Beginning Balance at May. 02, 2020	983.8	12.6	246.4	0.4	(985.2)	2,037.4	(327.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(81.7)					(81.7)
Other comprehensive income (loss)	17.8						17.8
Dividends declared: Common shares	0.0
Dividends declared: Preferred shares	(8.3)					(8.3)
Net settlement of equity-based awards	(0.1)		(0.5)		4.1	(3.7)
Share-based compensation expense	4.9		4.9
Ending Balance at Aug. 01, 2020	916.4	12.6	250.8	0.4	(981.1)	1,943.7	(310.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	9.3					9.3
Other comprehensive income (loss)	(4.4)						(4.4)
Dividends declared: Common shares	0.0
Dividends declared: Preferred shares	(8.4)					(8.4)
Net settlement of equity-based awards	(0.3)		0.0		0.7	(1.0)
Share-based compensation expense	3.3		3.3
Ending Balance at Oct. 31, 2020	$ 915.9	$ 12.6	$ 254.1	$ 0.4	$ (980.4)	$ 1,943.6	$ (314.4)