Earnings Per Share (Narrative) (Details) - shares shares in Millions	9 Months Ended
Oct. 29, 2022	Oct. 30, 2021
Earnings Per Share [Abstract]
Contingently issuable shares excluded from diluted earnings per share	0.8	0.5

Additional shares excluded from calculation of diluted eps as vesting conditions have not been satisfied.

No definition available.

Name:	fl_ContingentlyIssuableSharesExcludedFromDilutedEarningsPerShare
Namespace Prefix:	fl_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration