Income Taxes Income Taxes (Tax Cuts and Jobs Act of 2017) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Nov. 03, 2018	Nov. 03, 2018
Tax Cuts and Jobs Act of 2017 [Abstract]
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)	$ 0.4	$ 2.4

Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2A
-Subparagraph (SAB Topic 5.EE.Q2(f))
-URI http://asc.fasb.org/extlink&oid=116825942&loc=SL116722634-122817

Name:	us-gaap_TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration