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Contingent Obligations and Contingencies - Additional Information (Detail) $ in Millions	6 Months Ended
	Jul. 29, 2017 USD ($) Leases
Commitment And Contingencies [Line Items]
Estimated contingent obligations | $	$ 48.7
Number of leases subject to contingent liability, maximum | Leases	9

X

- Definition

Commitment And Contingencies [Line Items]

+ References

No definition available.

+ Details

Name:	tjx_CommitmentAndContingenciesLineItems
Namespace Prefix:	tjx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248

+ Details

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