Contingencies - Commitments (Details) $ in Millions	Jan. 29, 2022 USD ($)
Commitments Disclosure [Abstract]
Self-insurance letters of credit	$ 31.5

Represents letters of credit used as collateral to cover self-insurance related matters

No definition available.

Name:	big_SelfInsuranceLettersOfCredit
Namespace Prefix:	big_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant