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Contingent Obligations and Contingencies (Details) $ in Millions	9 Months Ended
	Oct. 31, 2020 USD ($) Lease
Commitments and Contingencies Disclosure [Abstract]
Number of leases subject to contingent liability, maximum | Lease	8
Estimated contingent obligations | $	$ 12.0

X

- Definition

Number of leases subject to contingent liability, maximum.

+ References

No definition available.

+ Details

Name:	tjx_NumberOfLeasesSubjectToContingentLiabilityMaximum
Namespace Prefix:	tjx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant