Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Other comprehensive income (loss):
Pension liability adjustments, tax	$ 0.1	$ 0.1	$ 0.2	$ 0.2
Postretirement liability adjustments, tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0

Other Comprehensive Income (Loss), Pension Liability Adjustment, Tax Amount

No definition available.

Name:	gco_OtherComprehensiveIncomeLossPensionLiabilityAdjustmentTaxAmount
Namespace Prefix:	gco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration