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v3.25.3

Segments and Disaggregated Revenue - Narrative (Details) | 9 Months Ended
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Nov. 01, 2025 USD ($) distributionCenter
Segment Reporting Information [Line Items] |
Merchandise Fixed Price, Price Point One | $ | $ 1.25
United States |
Segment Reporting Information [Line Items] |
Number of distribution centers | 16
Canada |
Segment Reporting Information [Line Items] |
Number of distribution centers | 2

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- Definition Merchandise Fixed Price, Price Point One + References No definition available. + Details
Name: | dltr_MerchandiseFixedPricePricePointOne
Namespace Prefix: | dltr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number Of Distribution Centers + References No definition available. + Details
Name: | dltr_NumberOfDistributionCenters
Namespace Prefix: | dltr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |