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Long-Term Debt and Credit Lines - Additional Information (Details) |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  |
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Jun. 25, 2021 USD ($) | Jun. 24, 2021 USD ($) | Jun. 04, 2021 USD ($) | Apr. 15, 2021 USD ($) | Jul. 31, 2021 USD ($) CreditFacility | Aug. 01, 2020 USD ($) CreditFacility | Jul. 31, 2021 USD ($) CreditFacility | Aug. 01, 2020 USD ($) CreditFacility | Jul. 31, 2021 CAD ($) CreditFacility | Jul. 31, 2021 GBP (£) CreditFacility | Jan. 30, 2021 USD ($) CreditFacility | Jan. 30, 2021 CAD ($) CreditFacility | Jan. 30, 2021 GBP (£) CreditFacility | Dec. 31, 2020 USD ($) | Nov. 30, 2020 USD ($) | Aug. 01, 2020 CAD ($) CreditFacility | Aug. 01, 2020 GBP (£) CreditFacility | May 02, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt |  |  |  |  | $ 242,248,000 | $ 0 | $ 242,248,000 | $ 0 |  |  |  |  |  |  |  |  |  |
Payments on debt |  |  |  |  |  |  | $ 2,975,518,000 | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |
TJX Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facilities, amount outstanding |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  |  | $ 0 |  |
Revolving credit facilities, number | CreditFacility |  |  |  |  | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |  |  | 2 | 2 |
Current borrowing capacity |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  | $ 10,000,000 |  |  |  | $ 10,000,000 |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |
Letter of Credit | TJX Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facilities, amount outstanding |  |  |  |  |  |  |  |  | 0 |  |  | 0 |  |  |  | 0 |  |
Current borrowing capacity |  |  |  |  |  |  |  |  | $ 10,000,000 |  |  | $ 10,000,000 |  |  |  | $ 10,000,000 |  |
TJX Europe Credit Line | TJX International |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facilities, amount outstanding | £ |  |  |  |  |  |  |  |  |  | £ 0 |  |  | £ 0 |  |  |  | £ 0 |
Current borrowing capacity | £ |  |  |  |  |  |  |  |  |  | £ 5,000,000 |  |  | £ 5,000,000 |  |  |  | £ 5,000,000 |
Revolving Credit Facility Due June 25, 2026 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity | $ 1,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Due March 11, 2022 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facilities, amount outstanding |  |  |  |  | 0 | $ 0 | 0 | $ 0 |  |  | $ 0 |  |  |  |  |  |  |
Revolving Credit Facility Due August 2021 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, expiration period | 364 days | 364 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Due May 10, 2024 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  |  | 500,000,000 |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  | $ 3,373,316,000 | 6,234,193,000 | $ 3,373,316,000 | 6,234,193,000 |  |  | $ 6,118,070,000 |  |  |  |  |  |  |
Senior Notes | 3.50% Senior Unsecured Notes Due June 4, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 1,250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  | 3.50% |  |  |  |  |  |  |  | 3.50% | 3.50% | 3.50% |  |  |  |  |
Long-term debt |  |  |  |  |  | 1,245,287,000 |  | 1,245,287,000 |  |  | $ 1,245,792,000 |  |  |  |  |  |  |
Senior Notes | 3.75% Senior Unsecured Notes Due June 4, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  | 3.75% |  |  |  |  |  |  |  | 3.75% | 3.75% | 3.75% |  |  |  |  |
Long-term debt |  |  |  |  |  | 749,507,000 |  | 749,507,000 |  |  | $ 749,544,000 |  |  |  |  |  |  |
Senior Notes | 2.750% Senior Notes Due June 15, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments on debt |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount redeemed |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 3.875% Senior Unsecured Notes Due April 15, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  | 3.875% |  | 3.875% |  | 3.875% | 3.875% |  |  |  |  |  |  |  | 3.875%
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,250,000,000
Long-term debt |  |  |  |  | $ 495,313,000 | 1,248,490,000 | $ 495,313,000 | 1,248,490,000 |  |  | 495,282,000 |  |  | $ 495,500,000 |  |  |  |
Senior Notes | 4.50% Senior Unsecured Notes Due April 15, 2050 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  | 4.50% |  | 4.50% |  | 4.50% | 4.50% |  |  |  |  |  |  |  | 4.50%
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 750,000,000
Long-term debt |  |  |  |  | $ 383,329,000 | $ 745,632,000 | $ 383,329,000 | $ 745,632,000 |  |  | $ 383,291,000 |  |  | $ 385,500,000 |  |  |  |
Senior Notes | 1.150% Notes Due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.15% |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |
Senior Notes | 1.600% Notes Due 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.60% |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |

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- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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