Income Taxes - Uncertain tax positions in tax expense (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 30, 2026	Jan. 31, 2025	Feb. 02, 2024
Income tax amounts associated with uncertain tax positions
Income tax expense (benefit)	$ (851)	$ 163	$ 3,930
Income tax related interest expense (benefit)	$ 154	773	$ 710
Income tax related penalty expense (benefit)		$ 826

Represents the expense recognized during the period from the resolution of unrecognized tax positions.

No definition available.

Name:	dg_UnrecognizedTaxBenefitsExpense
Namespace Prefix:	dg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpenseAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of expense for penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-15

+ Details

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

- Definition

Amount of interest expense for an underpayment of income taxes.

+ References

+ Details

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