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	3 Months Ended		12 Months Ended
	May 03, 2025 EUR (€) gal / mo	May 04, 2024 EUR (€) gal / mo	Feb. 01, 2025 EUR (€) gal / mo	May 03, 2025 GBP (£)	May 03, 2025 USD ($)	May 03, 2025 AUD ($)	May 03, 2025 CAD ($)	May 03, 2025 PLN (zł)	Feb. 01, 2025 GBP (£)	Feb. 01, 2025 USD ($)	Feb. 01, 2025 AUD ($)	Feb. 01, 2025 CAD ($)	Feb. 01, 2025 PLN (zł)	May 04, 2024 GBP (£)	May 04, 2024 USD ($)	May 04, 2024 AUD ($)	May 04, 2024 CAD ($)	May 04, 2024 PLN (zł)
Derivatives, Fair Value [Line Items]
Current Asset U.S.$					$ 14.3					$ 53.1					$ 15.5
Current (Liability) U.S.$					(79.5)					(18.1)					(14.5)
Net Fair Value in U.S.$					(65.2)					35.0					1.0
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.$					(16.1)					(9.1)					(8.1)
Net Fair Value in U.S.$					$ (16.1)					$ (9.1)					$ (8.1)
Conversion of Euro to Pound \| Intercompany billings in TJX International, primarily merchandise \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.8547												0.8547	0.8547	0.8547	0.8547	0.8547
Current Asset U.S.$															$ 0.0
Current (Liability) U.S.$															(0.6)
Net Fair Value in U.S.$															$ (0.6)
Conversion of Euro to Pound \| Intercompany billings in TJX International, primarily merchandise \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8549		0.8442	0.8549	0.8549	0.8549	0.8549	0.8549	0.8442	0.8442	0.8442	0.8442	0.8442
Current Asset U.S.$					$ 0.8					$ 1.5
Current (Liability) U.S.$					0.0					0.0
Net Fair Value in U.S.$					$ 0.8					$ 1.5
Conversion of Australian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.6346	0.6633	0.6448	0.6346	0.6346	0.6346	0.6346	0.6346	0.6448	0.6448	0.6448	0.6448	0.6448	0.6633	0.6633	0.6633	0.6633	0.6633
Current Asset U.S.$					$ 0.0					$ 1.7					$ 0.3
Current (Liability) U.S.$					(0.9)					(0.1)					(0.3)
Net Fair Value in U.S.$					$ (0.9)					$ 1.6					$ 0.0
Conversion of Pound to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	1.2778	1.2585	1.2742	1.2778	1.2778	1.2778	1.2778	1.2778	1.2742	1.2742	1.2742	1.2742	1.2742	1.2585	1.2585	1.2585	1.2585	1.2585
Current Asset U.S.$					$ 0.5					$ 15.2					$ 2.7
Current (Liability) U.S.$					(24.9)					(1.1)					(1.6)
Net Fair Value in U.S.$					$ (24.4)					$ 14.1					$ 1.1
Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.7070			0.7070	0.7070	0.7070	0.7070	0.7070
Current Asset U.S.$					$ 0.0
Current (Liability) U.S.$					(18.1)
Net Fair Value in U.S.$					$ (18.1)
Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.7400												0.7400	0.7400	0.7400	0.7400	0.7400
Current Asset U.S.$															$ 7.7
Current (Liability) U.S.$															(0.6)
Net Fair Value in U.S.$															$ 7.1
Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate			0.7159						0.7159	0.7159	0.7159	0.7159	0.7159
Current Asset U.S.$										$ 21.9
Current (Liability) U.S.$										0.0
Net Fair Value in U.S.$										$ 21.9
Conversion of Canadian Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.6546	0.6812	0.6673	0.6546	0.6546	0.6546	0.6546	0.6546	0.6673	0.6673	0.6673	0.6673	0.6673	0.6812	0.6812	0.6812	0.6812	0.6812
Current Asset U.S.$					$ 0.5					$ 0.1					$ 0.1
Current (Liability) U.S.$					(0.0)					(0.0)					(0.0)
Net Fair Value in U.S.$					$ 0.5					$ 0.1					$ 0.1
Conversion of Zloty to Pound \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate			0.1933						0.1933	0.1933	0.1933	0.1933	0.1933
Current Asset U.S.$										$ 0.0
Current (Liability) U.S.$										(3.5)
Net Fair Value in U.S.$										$ (3.5)
Conversion of Zloty to Pound \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.1950	0.1971		0.1950	0.1950	0.1950	0.1950	0.1950						0.1971	0.1971	0.1971	0.1971	0.1971
Current Asset U.S.$					$ 0.1										$ 0.0
Current (Liability) U.S.$					(2.4)										(0.7)
Net Fair Value in U.S.$					$ (2.3)										$ (0.7)
Conversion of US Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.9204	0.9190	0.9317	0.9204	0.9204	0.9204	0.9204	0.9204	0.9317	0.9317	0.9317	0.9317	0.9317	0.9190	0.9190	0.9190	0.9190	0.9190
Current Asset U.S.$					$ 5.1					$ 0.1					$ 0.1
Current (Liability) U.S.$					(0.2)					(2.9)					(1.2)
Net Fair Value in U.S.$					4.9					(2.8)					(1.1)
Pay \| Economic hedges for which hedge accounting was not elected \| (Accrued Exp) \| Minimum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount \| gal / mo	3.1	3.0	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 \| €		€ 142
Pay \| Conversion of Euro to Pound \| Intercompany billings in TJX International, primarily merchandise \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount \| €	€ 195		€ 175
Pay \| Conversion of Australian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount						$ 93					$ 81					$ 94
Pay \| Conversion of Pound to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £				£ 488					£ 416					£ 379
Pay \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount							$ 926
Pay \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount																	$ 851
Pay \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount												$ 873
Pay \| Conversion of Canadian Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount							$ 31					$ 33					$ 37
Pay \| Conversion of Zloty to Pound \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| zł													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 489										zł 534
Pay \| Conversion of US Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					109.0					87.0					133.0
Receive \| Economic hedges for which hedge accounting was not elected \| (Accrued Exp) \| Minimum
Derivatives, Fair Value [Line Items]
Derivative nonmonetary notional amount \| gal / mo	3.1	3.0	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 \| £														121
Receive \| Conversion of Euro to Pound \| Intercompany billings in TJX International, primarily merchandise \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £				167					148
Receive \| Conversion of Australian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					59.0					52.0					63.0
Receive \| Conversion of Pound to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					624.0					530.0					477.0
Receive \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount					$ 655.0
Receive \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount															$ 630.0
Receive \| Conversion of Canadian Dollar to US Dollar \| Merchandise purchase commitments \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Derivative notional amount										$ 625.0
Receive \| Conversion of Canadian Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| €	€ 20	€ 25	€ 22
Receive \| Conversion of Zloty to Pound \| Merchandise purchase commitments \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £									£ 107
Receive \| Conversion of Zloty to Pound \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £				£ 95										£ 105
Receive \| Conversion of US Dollar to Euro \| Merchandise purchase commitments \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| €	€ 101	€ 123	€ 82
Fair value hedges \| Conversion of Euro to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8522			0.8522	0.8522	0.8522	0.8522	0.8522
Current Asset U.S.$					$ 0.0
Current (Liability) U.S.$					(0.5)
Net Fair Value in U.S.$					$ (0.5)
Fair value hedges \| Conversion of Euro to Pound \| Intercompany balances, primarily debt \| Prepaid Exp / (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.8622	0.8523						0.8523	0.8523	0.8523	0.8523	0.8523	0.8622	0.8622	0.8622	0.8622	0.8622
Current Asset U.S.$										$ 0.7					$ 0.1
Current (Liability) U.S.$										(0.1)					(0.1)
Net Fair Value in U.S.$										$ 0.6					$ 0.0
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	0.6420	0.6743		0.6420	0.6420	0.6420	0.6420	0.6420						0.6743	0.6743	0.6743	0.6743	0.6743
Current Asset U.S.$					$ 1.4										$ 1.7
Current (Liability) U.S.$					(2.1)										(0.2)
Net Fair Value in U.S.$					$ (0.7)										$ 1.5
Fair value hedges \| Conversion of Australian Dollar to US Dollar \| Intercompany balances, primarily debt \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate			0.6420						0.6420	0.6420	0.6420	0.6420	0.6420
Current Asset U.S.$										$ 3.5
Current (Liability) U.S.$										0.0
Net Fair Value in U.S.$										$ 3.5
Fair value hedges \| Conversion of US Dollar to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.7898												0.7898	0.7898	0.7898	0.7898	0.7898
Current Asset U.S.$															$ 0.0
Current (Liability) U.S.$															(0.5)
Net Fair Value in U.S.$															$ (0.5)
Fair value hedges \| Conversion of US Dollar to Pound \| Intercompany balances, primarily debt \| Prepaid Exp
Derivatives, Fair Value [Line Items]
Blended Contract Rate	0.8177		0.8177	0.8177	0.8177	0.8177	0.8177	0.8177	0.8177	0.8177	0.8177	0.8177	0.8177
Current Asset U.S.$					$ 5.8					$ 0.8
Current (Liability) U.S.$					0.0					0.0
Net Fair Value in U.S.$					$ 5.8					$ 0.8
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	1.2222	1.2222	1.2222	1.2222	1.2222	1.2222
Current Asset U.S.$					$ 0.0					$ 0.0
Current (Liability) U.S.$					(5.3)					(0.9)
Net Fair Value in U.S.$					$ (5.3)					$ (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		1.2608												1.2608	1.2608	1.2608	1.2608	1.2608
Current Asset U.S.$															$ 0.8
Current (Liability) U.S.$															(0.3)
Net Fair Value in U.S.$															$ 0.5
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	1.1005	1.0937	1.0852	1.1005	1.1005	1.1005	1.1005	1.1005	1.0852	1.0852	1.0852	1.0852	1.0852	1.0937	1.0937	1.0937	1.0937	1.0937
Current Asset U.S.$					$ 0.1					$ 7.6					$ 2.0
Current (Liability) U.S.$					(9.0)					(0.4)					(0.3)
Net Fair Value in U.S.$					(8.9)					7.2					$ 1.7
Fair value hedges \| Conversion of Zloty to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Blended Contract Rate		0.1973												0.1973	0.1973	0.1973	0.1973	0.1973
Current Asset U.S.$															$ 0.0
Current (Liability) U.S.$															(0.0)
Net Fair Value in U.S.$															0.0
Fair value hedges \| Pay \| Conversion of Euro to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| €	€ 80
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										$ 146
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
Fair value hedges \| Pay \| Conversion of US Dollar to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount															70.0
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					67.0
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					£ 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 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 \| Pay \| Conversion of Zloty to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| zł																		zł 10
Fair value hedges \| Receive \| Conversion of Euro to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £				68
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					135.0										98.0
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
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					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															126.0
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					$ 220.0					$ 217.0					$ 219.0
Fair value hedges \| Receive \| Conversion of Zloty to Pound \| Intercompany balances, primarily debt \| (Accrued Exp)
Derivatives, Fair Value [Line Items]
Derivative notional amount \| £														£ 2

TJX COMPANIES INC /DE/ 10-Q