v3.26.1
Financial Instruments - Impact of Derivative Financial Instruments on Statement of Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
May 02, 2026
May 03, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative $ 54 $ (97)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of sales, including buying and occupancy costs, Selling, general and administrative expenses Cost of sales, including buying and occupancy costs, Selling, general and administrative expenses
Intercompany balances, primarily debt | Fair value hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative $ (1) $ (23)
Intercompany balances in TJX International | Economic hedges for which hedge accounting was not elected    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative 4 0
Diesel fuel contracts | Economic hedges for which hedge accounting was not elected    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative 47 (12)
Intercompany billings in TJX International, primarily merchandise | Economic hedges for which hedge accounting was not elected    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative 2 (3)
Merchandise purchase commitments | Economic hedges for which hedge accounting was not elected    
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of Gain (Loss) Recognized in Income by Derivative $ 2 $ (59)