Income Taxes Income Taxes (Details 6) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		11 Months Ended	12 Months Ended
	Feb. 03, 2018	Nov. 03, 2018	Feb. 03, 2018	Dec. 31, 2017	Feb. 02, 2019	Feb. 03, 2018	Jan. 28, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%			35.00%	21.00%	33.72%	35.00%
Estimated Tax Benefits Related to the Tax Act		$ 2.9	$ 77.4
Estimated Tax Benefits of Tax Cuts and Jobs Act, per share amount		$ 0.11	$ 2.73