Financial Instruments - Impact of Derivative Financial Instruments on Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in (loss) / income	$ (45,784)	$ (5,538)	$ (25,528)	$ 15,457
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	(38,060)	(10,345)	(43,233)	(6,712)
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	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]
Gain recognized in (loss) / income	10,123	(6,319)	(12,731)	(2,632)
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	(2,039)	(6,351)	(3,891)	(4,200)
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	108	0	(1,414)
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	$ (15,808)	$ 17,369	$ 34,327	$ 27,158