Financial Instruments - Impact of Derivative Financial Instruments on Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	May 02, 2020	May 04, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	$ 20,256	$ 20,995
Intercompany balances, primarily debt and related interest | Selling, general and administrative expenses | Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	(5,173)	3,633
Intercompany receivable | Selling, general and administrative expenses | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	0	3,257
Diesel fuel contracts | Cost of sales, including buying and occupancy costs | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	(22,854)	3,687
Intercompany billings in TJX International, primarily merchandise related | Cost of sales, including buying and occupancy costs | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	(1,852)	2,151
International lease liabilities | Cost of sales, including buying and occupancy costs | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	0	(1,522)
Merchandise purchase commitments | Cost of sales, including buying and occupancy costs | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	$ 50,135	$ 9,789