Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020
Pre-tax amount
Foreign currency translation adjustments	$ (4.3)	$ (2.8)	$ 3.1	$ (11.1)
Available-for-sale securities:
Unrealized gain (loss)	(0.1)	(0.1)	(0.2)	0.3
Cash flow hedges:
Unrealized gain (loss)	0.4	0.0	0.2	0.2
Reclassification adjustment for losses (gains) to earnings	0.1	(1.8)	0.6	(13.4)
Pension plan:
Actuarial loss	(72.9)	0.0	(72.9)	0.0
Reclassification adjustment for amortization of actuarial losses to earnings	1.0	0.1	1.4	0.2
Reclassification adjustment for amortization of net prior service costs to earnings	0.0	0.4	0.1	0.7
Total other comprehensive income (loss)	(75.8)	(4.2)	(67.7)	(23.1)
Tax (expense) benefit
Foreign currency translation adjustments	0.0	0.0	0.0	0.0
Available-for-sale securities:
Unrealized gain (loss)	0.0	0.0	0.0	0.0
Cash flow hedges:
Unrealized gain (loss)	0.0	0.0	0.0	0.0
Reclassification adjustment for losses (gains) to earnings	0.0	(0.1)	(0.1)	2.6
Pension plan:
Actuarial loss	14.0	0.0	14.0	0.0
Reclassification adjustment for amortization of actuarial losses to earnings	(0.2)	0.0	(0.3)	0.0
Reclassification adjustment for amortization of net prior service costs to earnings	0.0	(0.1)	0.0	(0.1)
Total other comprehensive income (loss)	13.8	(0.2)	13.6	2.5
After-tax amount
Net income (loss)	92.6	9.3	455.6	(269.5)
Foreign currency translation adjustments	(4.3)	(2.8)	3.1	(11.1)
Available-for-sale securities:
Unrealized gain (loss)	(0.1)	(0.1)	(0.2)	0.3
Cash flow hedges:
Unrealized gain (loss)	0.4	0.0	0.2	0.2
Reclassification adjustment for losses (gains) to earnings	0.1	(1.9)	0.5	(10.8)
Pension plan:
Actuarial loss	(58.9)	0.0	(58.9)	0.0
Reclassification adjustment for amortization of actuarial losses to earnings	0.8	0.1	1.1	0.2
Reclassification adjustment for amortization of net prior service costs to earnings	0.0	0.3	0.1	0.6
Total other comprehensive income (loss)	(62.0)	(4.4)	(54.1)	(20.6)
Total comprehensive income (loss)	$ 30.6	$ 4.9	$ 401.5	$ (290.1)