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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Dec. 21, 2012
Jan. 28, 2012
Summary Of Significant Accounting Policies [Line Items]          
Weeks in the fiscal year 364 days 364 days 371 days    
Revenue recognized from store card breakage $ 17,800,000us-gaap_RevenueRecognitionGiftCardsBreakage $ 17,500,000us-gaap_RevenueRecognitionGiftCardsBreakage $ 13,900,000us-gaap_RevenueRecognitionGiftCardsBreakage    
Highly liquid investments maximum maturity days 90 days        
Cash and cash equivalents 2,493,775,000us-gaap_CashAndCashEquivalentsAtCarryingValue 2,149,746,000us-gaap_CashAndCashEquivalentsAtCarryingValue 1,811,957,000us-gaap_CashAndCashEquivalentsAtCarryingValue   1,507,112,000us-gaap_CashAndCashEquivalentsAtCarryingValue
In-transit inventory accrual 495,200,000us-gaap_OtherInventoryInTransit 451,600,000us-gaap_OtherInventoryInTransit      
Depreciation and amortization expense 595,600,000us-gaap_DepreciationNonproduction 555,800,000us-gaap_DepreciationNonproduction 515,900,000us-gaap_DepreciationNonproduction    
Amortization expense under capital lease     1,700,000us-gaap_CapitalLeasesIncomeStatementAmortizationExpense    
Property held under capital lease 0us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet        
Rent expense recorded prior to minimum number of days before opening of store, in days 30 days        
Rent expense recorded prior to maximum number of days before opening of store, in days 60 days        
Percentage owned in subsidiary company 83.00%us-gaap_EquityMethodInvestmentOwnershipPercentage        
Goodwill 169,000,000us-gaap_Goodwill 169,300,000us-gaap_Goodwill 170,300,000us-gaap_Goodwill 97,000,000us-gaap_Goodwill  
Intangible assets impairment 0us-gaap_GoodwillAndIntangibleAssetImpairment 0us-gaap_GoodwillAndIntangibleAssetImpairment 0us-gaap_GoodwillAndIntangibleAssetImpairment    
Advertising expense 371,300,000us-gaap_AdvertisingExpense 333,500,000us-gaap_AdvertisingExpense 298,600,000us-gaap_AdvertisingExpense    
Assets held for sale   10,000,000us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure 10,000,000us-gaap_AssetsHeldForSaleLongLivedFairValueDisclosure    
Marshalls          
Summary Of Significant Accounting Policies [Line Items]          
Indefinite lived Tradename carried value 107,700,000us-gaap_IndefiniteLivedTradeNames
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_MarshallsMember		        
Sierra Trading Post          
Summary Of Significant Accounting Policies [Line Items]          
Definite lived Tradename carried value 33,200,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		 35,700,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		 38,300,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		    
Definite lived trade name amortization period 15 years        
Definite lived trade name amortization 5,300,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		 2,800,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		 200,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= tjx_SierraTradingPostMember		    
Building          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 33 years        
Leaseholds and Leasehold Improvements          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful lives Amortized over their useful life or the committed lease term (typically 10 years), whichever is shorter        
Outside United States          
Summary Of Significant Accounting Policies [Line Items]          
Cash and cash equivalents 1,200,000,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_StatementBusinessSegmentsAxis
= tjx_OutsideUnitedStatesMember		        
Reinvest Undistributed Earnings          
Summary Of Significant Accounting Policies [Line Items]          
Cash and cash equivalents $ 413,900,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_StatementBusinessSegmentsAxis
= tjx_ReinvestUndistributedEarningsMember		        
Minimum          
Summary Of Significant Accounting Policies [Line Items]          
Short-term investments maturity term 90 days        
Definite lived trade name amortization period 7 years        
Minimum | Software          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 3 years        
Minimum | Furniture, Fixtures And Equipment          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 3 years        
Maximum          
Summary Of Significant Accounting Policies [Line Items]          
Short-term investments maturity term 1 year        
Definite lived trade name amortization period 10 years        
Maximum | Software          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 10 years        
Maximum | Leaseholds and Leasehold Improvements          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 10 years        
Maximum | Furniture, Fixtures And Equipment          
Summary Of Significant Accounting Policies [Line Items]          
Property, plant and equipment useful life 10 years