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Long-Term Debt and Credit Lines - Additional Information (Detail)
12 Months Ended
Feb. 01, 2020
USD ($)
CreditFacility
Feb. 01, 2020
USD ($)
CreditFacility
Feb. 02, 2019
USD ($)
CreditFacility
Mar. 20, 2020
USD ($)
Feb. 01, 2020
GBP (£)
CreditFacility
Feb. 01, 2020
CAD ($)
CreditFacility
Feb. 02, 2019
GBP (£)
CreditFacility
Feb. 02, 2019
CAD ($)
CreditFacility
Debt Instrument [Line Items]                
Revolving credit facilities, number | CreditFacility 2 2     2 2    
Quarterly payments on unused committed amounts   0.06%            
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%    
Credit facilities, amount outstanding $ 0 $ 0 $ 0          
Subsequent Event                
Debt Instrument [Line Items]                
Current borrowing capacity       $ 1,000,000,000        
TJX Canada                
Debt Instrument [Line Items]                
Current borrowing capacity           $ 10,000,000   $ 10,000,000
Revolving credit facilities, number | CreditFacility 2 2 2   2 2 2 2
Credit facilities, amount outstanding           $ 0   $ 0
TJX Canada | Letter of Credit                
Debt Instrument [Line Items]                
Current borrowing capacity           $ 10,000,000   $ 10,000,000
TJX International | TJX Europe Credit Line                
Debt Instrument [Line Items]                
Current borrowing capacity | £         £ 5,000,000   £ 5,000,000  
Credit facilities, amount outstanding | £         £ 0   £ 0  
2.25% Ten-Year Notes                
Debt Instrument [Line Items]                
Aggregate principal amount $ 1,000,000,000.0 $ 1,000,000,000.0            
Debt instrument, interest rate 2.25% 2.25%     2.25% 2.25%    
Debt instrument maturity period, years 10 years              
Effective fixed rate 2.36% 2.36%     2.36% 2.36%    
2.25% Ten-Year Notes | Interest Rate Contract                
Debt Instrument [Line Items]                
Derivative notional amount $ 700,000,000 $ 700,000,000            
2.50% Ten-Year Notes                
Debt Instrument [Line Items]                
Debt instrument, interest rate 2.50% 2.50%     2.50% 2.50%    
Debt instrument maturity period, years   10 years            
Current borrowing capacity $ 500,000,000 $ 500,000,000            
Effective fixed rate 2.57% 2.57%     2.57% 2.57%    
2.50% Ten-Year Notes | Interest Rate Contract                
Debt Instrument [Line Items]                
Derivative notional amount $ 250,000,000 $ 250,000,000            
2.75% Seven-Year Notes                
Debt Instrument [Line Items]                
Aggregate principal amount $ 750,000,000 $ 750,000,000            
Debt instrument, interest rate 2.75% 2.75%     2.75% 2.75%    
Debt instrument maturity period, years   7 years            
Effective fixed rate 2.91% 2.91%     2.91% 2.91%    
Cash flow hedges, pre-tax realized loss   $ 7,900,000            
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          
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