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Long-Term Debt and Credit Lines - Additional Information (Details) |  | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 15, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jul. 31, 2021 USD ($) | May 01, 2021 USD ($) CreditFacility | Jul. 31, 2020 | May 15, 2020 | May 02, 2020 USD ($) CreditFacility | May 01, 2021 CAD ($) CreditFacility | May 01, 2021 GBP (£) CreditFacility | Jan. 30, 2021 USD ($) CreditFacility | Jan. 30, 2021 CAD ($) CreditFacility | Jan. 30, 2021 GBP (£) CreditFacility | Dec. 31, 2020 USD ($) | Nov. 30, 2020 USD ($) | May 02, 2020 CAD ($) CreditFacility | May 02, 2020 GBP (£) CreditFacility
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments on debt |  |  |  | $ 750,000,000 |  |  | $ 0 |  |  |  |  |  |  |  |  |
TJX Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  |  | $ 10,000,000 |  |  | $ 10,000,000 |  |  |  | $ 10,000,000 |
Credit facilities, amount outstanding |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  |  | $ 0 |
Revolving credit facilities, number | CreditFacility |  |  |  | 2 |  |  | 2 | 2 | 2 | 2 | 2 | 2 |  |  | 2 | 2
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  | $ 1,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Letter of Credit | TJX Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  |  |  |  |  |  | $ 10,000,000 |  |  | $ 10,000,000 |  |  |  | $ 10,000,000 |
Credit facilities, amount outstanding |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 |  |  |  | $ 0 |
TJX Europe Credit Line | TJX International |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current borrowing capacity | £ |  |  |  |  |  |  |  |  | £ 5,000,000 |  |  | £ 5,000,000 |  |  |  | £ 5,000,000
Credit facilities, amount outstanding | £ |  |  |  |  |  |  |  |  | £ 0 |  |  | £ 0 |  |  |  | £ 0
Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Due May 10, 2024 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility Due March 11, 2022 | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  | 500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  |  |  | 2.007% | 1.757% |  |  |  |  |  |  |  |  |  |
Credit facilities, amount outstanding |  |  |  | 0 |  |  | $ 1,000,000,000 |  |  | $ 0 |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 5,368,644,000 |  |  | 7,233,629,000 |  |  | 6,118,070,000 |  |  |  |  |  |
Senior Notes | 3.50% Senior Unsecured Notes Due April 15, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 1,250,000,000 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  | 3.50% |  |  | 3.50% | 3.50% | 3.50% |  |  |  |  |  | 3.50% | 3.50%
Long-term debt |  |  |  | $ 1,246,044,000 |  |  | $ 1,245,034,000 |  |  | 1,245,792,000 |  |  |  |  |  |
Senior Notes | 3.50% Senior Unsecured Notes Due April 15, 2025 | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  | 3.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt |  | $ 1,250,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 3.75% Senior Unsecured Notes Due April 15, 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  | 3.75% |  |  | 3.75% | 3.75% | 3.75% |  |  |  |  |  | 3.75% | 3.75%
Long-term debt |  |  |  | $ 749,563,000 |  |  | $ 749,489,000 |  |  | 749,544,000 |  |  |  |  |  |
Senior Notes | 3.75% Senior Unsecured Notes Due April 15, 2027 | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Extinguishment of debt |  | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Notes | 3.875% Senior Unsecured Notes Due April 15, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 1,250,000,000 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  | 3.875% |  |  | 3.875% | 3.875% | 3.875% |  |  |  |  |  | 3.875% | 3.875%
Long-term debt |  |  |  | $ 495,297,000 |  |  | $ 1,248,451,000 |  |  | 495,282,000 |  |  | $ 495,500,000 |  |  |
Senior Notes | 4.50% Senior Unsecured Notes Due April 15, 2050 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |  |
Debt instrument, interest rate |  |  |  | 4.50% |  |  | 4.50% | 4.50% | 4.50% |  |  |  |  |  | 4.50% | 4.50%
Long-term debt |  |  |  | $ 383,310,000 |  |  | $ 745,595,000 |  |  | $ 383,291,000 |  |  | $ 385,500,000 |  |  |
Senior Notes | 1.150% Notes Due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.15% |  |
Senior Notes | 1.600% Notes Due 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 |  |
Debt instrument, interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.60% |  |
Senior Notes | 2.750% Senior Notes Due June 15, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, interest rate | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments on debt | $ 750,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount redeemed | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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