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Financial Instruments - Summary of Derivative Financial Instruments, Related Fair Value and Balance Sheet Classification (Details) € in Millions, £ in Millions, zł in Millions, gal / mo in Millions, $ in Millions, $ in Millions, $ in Millions	6 Months Ended		12 Months Ended
	Aug. 02, 2025 EUR (€) gal / mo	Aug. 03, 2024 EUR (€) gal / mo	Feb. 01, 2025 EUR (€) gal / mo	Aug. 02, 2025 GBP (£)	Aug. 02, 2025 USD ($)	Aug. 02, 2025 AUD ($)	Aug. 02, 2025 CAD ($)	Aug. 02, 2025 PLN (zł)	Feb. 01, 2025 GBP (£)	Feb. 01, 2025 USD ($)	Feb. 01, 2025 AUD ($)	Feb. 01, 2025 CAD ($)	Feb. 01, 2025 PLN (zł)	Aug. 03, 2024 GBP (£)	Aug. 03, 2024 USD ($)	Aug. 03, 2024 AUD ($)	Aug. 03, 2024 CAD ($)	Aug. 03, 2024 PLN (zł)
Derivatives, Fair Value [Line Items]
Current Asset U.S.$					$ 14.2					$ 53.1					$ 19.1
Current (Liability) U.S.$					(39.1)					(18.1)					(28.6)
Net Fair Value in U.S.$					(24.9)					35.0					(9.5)
Economic hedges for which hedge accounting was not elected | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Current Asset U.S.$					0.0					0.0					0.0
Current (Liability) U.S.$					(0.4)					(9.1)					(15.6)
Net Fair Value in U.S.$					$ (0.4)					$ (9.1)					$ (15.6)
Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8680	0.8408		0.8680	0.8680	0.8680	0.8680	0.8680						0.8408	0.8408	0.8408	0.8408	0.8408
Current Asset U.S.$					$ 0.0										$ 0.0
Current (Liability) U.S.$					(1.1)										(2.4)
Net Fair Value in U.S.$					$ (1.1)										$ (2.4)
Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate			0.8442						0.8442	0.8442	0.8442	0.8442	0.8442
Current Asset U.S.$										$ 1.5
Current (Liability) U.S.$										0.0
Net Fair Value in U.S.$										$ 1.5
Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.6472		0.6448	0.6472	0.6472	0.6472	0.6472	0.6472	0.6448	0.6448	0.6448	0.6448	0.6448
Current Asset U.S.$					$ 0.3					$ 1.7
Current (Liability) U.S.$					(0.4)					(0.1)
Net Fair Value in U.S.$					$ (0.1)					$ 1.6
Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.6677												0.6677	0.6677	0.6677	0.6677	0.6677
Current Asset U.S.$															$ 1.8
Current (Liability) U.S.$															0.0
Net Fair Value in U.S.$															$ 1.8
Conversion of Pound to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	1.3165	1.2704	1.2742	1.3165	1.3165	1.3165	1.3165	1.3165	1.2742	1.2742	1.2742	1.2742	1.2742	1.2704	1.2704	1.2704	1.2704	1.2704
Current Asset U.S.$					$ 5.2					$ 15.2					$ 0.8
Current (Liability) U.S.$					(12.1)					(1.1)					(5.8)
Net Fair Value in U.S.$					$ (6.9)					$ 14.1					$ (5.0)
Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.7244			0.7244	0.7244	0.7244	0.7244	0.7244
Current Asset U.S.$					$ 3.3
Current (Liability) U.S.$					(6.5)
Net Fair Value in U.S.$					$ (3.2)
Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.7340	0.7159						0.7159	0.7159	0.7159	0.7159	0.7159	0.7340	0.7340	0.7340	0.7340	0.7340
Current Asset U.S.$										$ 21.9					$ 10.5
Current (Liability) U.S.$										0.0					0.0
Net Fair Value in U.S.$										$ 21.9					$ 10.5
Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate			0.6673						0.6673	0.6673	0.6673	0.6673	0.6673
Current Asset U.S.$										$ 0.1
Current (Liability) U.S.$										(0.0)
Net Fair Value in U.S.$										$ 0.1
Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.6330	0.6745		0.6330	0.6330	0.6330	0.6330	0.6330						0.6745	0.6745	0.6745	0.6745	0.6745
Current Asset U.S.$					$ 0.4										$ 0.5
Current (Liability) U.S.$					0.0										0.0
Net Fair Value in U.S.$					$ 0.4										$ 0.5
Conversion of Zloty to Pound | Merchandise purchase commitments | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.1994		0.1933	0.1994	0.1994	0.1994	0.1994	0.1994	0.1933	0.1933	0.1933	0.1933	0.1933
Current Asset U.S.$					$ 0.0					$ 0.0
Current (Liability) U.S.$					(3.0)					(3.5)
Net Fair Value in U.S.$					$ (3.0)					$ (3.5)
Conversion of Zloty to Pound | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.1970												0.1970	0.1970	0.1970	0.1970	0.1970
Current Asset U.S.$															$ 0.2
Current (Liability) U.S.$															(1.1)
Net Fair Value in U.S.$															$ (0.9)
Conversion of US Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8841	0.9200	0.9317	0.8841	0.8841	0.8841	0.8841	0.8841	0.9317	0.9317	0.9317	0.9317	0.9317	0.9200	0.9200	0.9200	0.9200	0.9200
Current Asset U.S.$					$ 3.1					$ 0.1					$ 1.0
Current (Liability) U.S.$					(0.2)					(2.9)					(0.1)
Net Fair Value in U.S.$					2.9					(2.8)					0.9
Pay | Economic hedges for which hedge accounting was not elected | (Accrued Exp) | Minimum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount | gal / mo	3.2	3.1	3.1
Pay | Economic hedges for which hedge accounting was not elected | (Accrued Exp) | Maximum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount | gal / mo	4.1	4.2	3.9
Pay | Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €	€ 159	€ 157
Pay | Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount | €			€ 175
Pay | Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount						$ 123					$ 81
Pay | Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount																$ 120
Pay | Conversion of Pound to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				£ 557					£ 416					£ 434
Pay | Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount							$ 987
Pay | Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount												$ 873					$ 899
Pay | Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount												$ 33
Pay | Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount							$ 43										$ 33
Pay | Conversion of Zloty to Pound | Merchandise purchase commitments | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | zł								zł 503					zł 552
Pay | Conversion of Zloty to Pound | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | zł																		zł 554
Pay | Conversion of US Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					102.0					87.0					136.0
Receive | Economic hedges for which hedge accounting was not elected | (Accrued Exp) | Minimum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount | gal / mo	3.2	3.1	3.1
Receive | Economic hedges for which hedge accounting was not elected | (Accrued Exp) | Maximum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount | gal / mo	4.1	4.2	3.9
Receive | Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				138										132
Receive | Conversion of Euro to Pound | Intercompany billings in TJX International, primarily merchandise | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount | £									148
Receive | Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					80.0					52.0
Receive | Conversion of Australian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount															80.0
Receive | Conversion of Pound to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					733.0					530.0					551.0
Receive | Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					$ 715.0
Receive | Conversion of Canadian Dollar to US Dollar | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount										$ 625.0					$ 660.0
Receive | Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €			€ 22
Receive | Conversion of Canadian Dollar to Euro | Merchandise purchase commitments | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount | €	€ 27	€ 22
Receive | Conversion of Zloty to Pound | Merchandise purchase commitments | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				£ 100					£ 107
Receive | Conversion of Zloty to Pound | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £														£ 109
Receive | Conversion of US Dollar to Euro | Merchandise purchase commitments | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €	€ 90	€ 125	€ 82
Fair value hedges | Conversion of Euro to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8684			0.8684	0.8684	0.8684	0.8684	0.8684
Current Asset U.S.$					$ 0.0
Current (Liability) U.S.$					(1.4)
Net Fair Value in U.S.$					$ (1.4)
Fair value hedges | Conversion of Euro to Pound | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.8546	0.8523						0.8523	0.8523	0.8523	0.8523	0.8523	0.8546	0.8546	0.8546	0.8546	0.8546
Current Asset U.S.$										$ 0.7					$ 0.3
Current (Liability) U.S.$										(0.1)					(0.7)
Net Fair Value in U.S.$										$ 0.6					$ (0.4)
Fair value hedges | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.6393			0.6393	0.6393	0.6393	0.6393	0.6393
Current Asset U.S.$					$ 0.4
Current (Liability) U.S.$					(2.6)
Net Fair Value in U.S.$					$ (2.2)
Fair value hedges | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.6637	0.6420						0.6420	0.6420	0.6420	0.6420	0.6420	0.6637	0.6637	0.6637	0.6637	0.6637
Current Asset U.S.$										$ 3.5					$ 2.2
Current (Liability) U.S.$										0.0					0.0
Net Fair Value in U.S.$										$ 3.5					$ 2.2
Fair value hedges | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.7409			0.7409	0.7409	0.7409	0.7409	0.7409
Current Asset U.S.$					$ 0.0
Current (Liability) U.S.$					(1.1)
Net Fair Value in U.S.$					$ (1.1)
Fair value hedges | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.7898	0.8177						0.8177	0.8177	0.8177	0.8177	0.8177	0.7898	0.7898	0.7898	0.7898	0.7898
Current Asset U.S.$										$ 0.8					$ 0.7
Current (Liability) U.S.$										0.0					0.0
Net Fair Value in U.S.$										$ 0.8					$ 0.7
Fair value hedges | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate			1.2222						1.2222	1.2222	1.2222	1.2222	1.2222
Current Asset U.S.$										$ 0.0
Current (Liability) U.S.$										(0.9)
Net Fair Value in U.S.$										$ (0.9)
Fair value hedges | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		1.2712												1.2712	1.2712	1.2712	1.2712	1.2712
Current Asset U.S.$															$ 0.5
Current (Liability) U.S.$															(1.6)
Net Fair Value in U.S.$															$ (1.1)
Fair value hedges | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate	1.3490			1.3490	1.3490	1.3490	1.3490	1.3490
Current Asset U.S.$					$ 1.0
Current (Liability) U.S.$					0.0
Net Fair Value in U.S.$					$ 1.0
Fair value hedges | Conversion Of Euro To US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	1.1221	1.0949	1.0852	1.1221	1.1221	1.1221	1.1221	1.1221	1.0852	1.0852	1.0852	1.0852	1.0852	1.0949	1.0949	1.0949	1.0949	1.0949
Current Asset U.S.$					$ 0.5					$ 7.6					$ 0.6
Current (Liability) U.S.$					(10.3)					(0.4)					(1.3)
Net Fair Value in U.S.$					(9.8)					7.2					(0.7)
Fair value hedges | Pay | Conversion of Euro to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €	€ 83
Fair value hedges | Pay | Conversion of Euro to Pound | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €		€ 78	€ 79
Fair value hedges | Pay | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount						$ 210
Fair value hedges | Pay | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount											$ 210					$ 210
Fair value hedges | Pay | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					74.0
Fair value hedges | Pay | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount										67.0					70.0
Fair value hedges | Pay | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £									£ 50
Fair value hedges | Pay | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £														£ 100
Fair value hedges | Pay | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				£ 50
Fair value hedges | Pay | Conversion Of Euro To US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | €	€ 200	€ 200	€ 200
Fair value hedges | Receive | Conversion of Euro to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				72
Fair value hedges | Receive | Conversion of Euro to Pound | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £									67					67
Fair value hedges | Receive | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					134.0
Fair value hedges | Receive | Conversion of Australian Dollar to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount										135.0					139.0
Fair value hedges | Receive | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount | £				£ 55
Fair value hedges | Receive | Conversion of US Dollar to Pound | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount | £									£ 55					£ 55
Fair value hedges | Receive | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount										61.0
Fair value hedges | Receive | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount															127.0
Fair value hedges | Receive | Conversion of Pound to US Dollar | Intercompany balances, primarily debt | Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount					67.0
Fair value hedges | Receive | Conversion Of Euro To US Dollar | Intercompany balances, primarily debt | Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					$ 224.0					$ 217.0					$ 219.0

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+ References

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+ References

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- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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