Financial Instruments - Impact of Derivative Financial Instruments on Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain recognized in income / (loss)	$ (2,153)	$ (5,410)	$ (27,681)	$ 10,047
Intercompany balances, primarily debt and related interest | Selling, general and administrative expenses | Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain recognized in income / (loss)	(2,086)	7,238	(45,319)	526
Intercompany receivable | Selling, general and administrative expenses | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) gain recognized in income / (loss)	0	0	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]
(Loss) gain recognized in income / (loss)	(7,059)	529	(19,790)	(2,103)
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]
(Loss) gain recognized in income / (loss)	(310)	5,144	(4,201)	944
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]
(Loss) gain recognized in income / (loss)	0	301	0	(1,113)
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]
(Loss) gain recognized in income / (loss)	$ 7,302	$ (18,622)	$ 41,629	$ 8,536