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v3.21.1

Basis of Presentation and Summary of Accounting Policies - Lease Accounting (Additional Information) (Details) | 12 Months Ended
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Jan. 30, 2021
Minimum |
Lessee, Lease, Description [Line Items] |
Operating lease term of possession previous to opening store | 30 days
Maximum |
Lessee, Lease, Description [Line Items] |
Operating lease term of possession previous to opening store | 60 days

X
- Definition Lessee, Operating Lease, Term Of Possession Previous To Opening Store + References No definition available. + Details
Name: | tjx_LesseeOperatingLeaseTermOfPossessionPreviousToOpeningStore
Namespace Prefix: | tjx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |