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Contingent Obligations, Contingencies and Commitments - Additional Information (Details) $ in Millions | 12 Months Ended |
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Jan. 30, 2021 USD ($) lease | Feb. 01, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |
Number of leases subject to contingent liability, maximum | lease | 8 |
Estimated contingent obligations | $ 11 |
Outstanding letters of credit issued for the purchase of inventory | $ 28 | $ 30

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- Definition Number of leases subject to contingent liability, maximum. + References No definition available. + Details
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Namespace Prefix: | tjx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant