Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Feb. 02, 2019	Nov. 03, 2018	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Computed “expected” tax rate			21.00%	21.00%	33.70%
State taxes, net of federal benefit			3.00%	1.10%	2.40%
Non-U.S. tax expense higher (lower) than federal statutory tax rate			0.00%	24.20%	(10.50%)
Tax Reform - repatriation tax adjustment			0.00%	(41.80%)	32.80%
Tax Reform - deferred tax adjustment			0.00%	0.00%	35.40%
Swiss tax reform			(6.50%)	0.00%	0.00%
Valuation reserve			(0.20%)	0.50%	12.90%
Unrecognized tax liabilities (benefits)			(6.20%)	51.30%	0.80%
Share-based compensation			0.90%	0.20%	1.50%
Net tax settlements			9.10%	0.00%	0.00%
Prior year tax adjustments			(1.80%)	0.30%	0.70%
Non-deductible permanent differences			0.60%	16.50%	(4.10%)
Foreign derived intangible income			(3.40%)	(10.20%)	0.00%
Other			1.70%	0.10%	0.00%
Effective tax rate			18.20%	63.20%	105.60%
Income tax benefit from reversal of provisional amount	$ 25.8	$ (19.6)