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Long-Term Debt and Credit Lines - Additional Information (Detail)
6 Months Ended 12 Months Ended
Aug. 03, 2019
CAD ($)
CreditFacility
Aug. 04, 2018
CAD ($)
CreditFacility
Feb. 02, 2019
CAD ($)
CreditFacility
Aug. 03, 2019
GBP (£)
CreditFacility
Aug. 03, 2019
USD ($)
CreditFacility
Feb. 02, 2019
GBP (£)
CreditFacility
Feb. 02, 2019
USD ($)
CreditFacility
Aug. 04, 2018
GBP (£)
CreditFacility
Aug. 04, 2018
USD ($)
CreditFacility
Debt Instrument [Line Items]                  
Revolving credit facilities, number | CreditFacility 2 2 2 2 2 2 2 2 2
Ratio of funded debt and four-times consolidated rentals to consolidated earnings before interest, taxes, consolidated rentals, depreciation and amortization 325.00% 325.00% 325.00% 325.00% 325.00% 325.00% 325.00% 325.00% 325.00%
Credit facilities, amount outstanding         $ 0   $ 0   $ 0
Quarterly payments on unused committed amounts 0.06% 0.06% 0.06%            
TJX Canada                  
Debt Instrument [Line Items]                  
Revolving credit facilities, number | CreditFacility 2 2 2 2 2 2 2 2 2
Current borrowing capacity $ 10,000,000 $ 10,000,000 $ 10,000,000            
Credit facilities, amount outstanding 0 0 0            
TJX Canada | Letter of Credit                  
Debt Instrument [Line Items]                  
Current borrowing capacity   10,000,000 10,000,000            
Credit facilities, amount outstanding $ 0 $ 0 $ 0            
TJX International | TJX Europe Credit Line                  
Debt Instrument [Line Items]                  
Revolving credit facilities, number | CreditFacility 1 1 1 1 1 1 1 1 1
Current borrowing capacity | £       £ 5,000,000   £ 5,000,000   £ 5,000,000  
Credit facilities, amount outstanding | £       £ 0   £ 0   £ 0  
Revolving Credit Facility March 2022                  
Debt Instrument [Line Items]                  
Current borrowing capacity         $ 500,000,000   $ 500,000,000   $ 500,000,000
Maturity Month/Year 2022-03 2022-03 2022-03            
Revolving Credit Facility May 2024                  
Debt Instrument [Line Items]                  
Current borrowing capacity         $ 500,000,000   $ 500,000,000   $ 500,000,000
Maturity Month/Year 2024-05 2024-05 2024-05