Financial Instruments - Impact of Derivative Financial Instruments on Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended
	May 04, 2019	May 05, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income	$ 20,995	$ 34,500
Intercompany Balances, Primarily And Related Interest | Selling, General And Administrative Expenses | Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income	3,633	(1,792)
Intercompany Dividends | Selling, General And Administrative Expenses | Economic Hedges For Which Hedge Accounting Was Not Elected
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income	3,257	0
Diesel 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 (loss) recognized in income	3,687	4,953
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 (loss) recognized in income	2,151	(118)
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 (loss) recognized in income	(1,522)	0
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 (loss) recognized in income	$ 9,789	$ 31,457