Annual report pursuant to Section 13 and 15(d)

PENDING ACQUISITION AND RELATED DEBT (Details)

v2.4.1.9
PENDING ACQUISITION AND RELATED DEBT (Details) (Subsequent Event [Member], USD $)
0 Months Ended
Feb. 24, 2015
Mar. 09, 2015
Feb. 23, 2015
Senior Notes [Line Items]      
Debt Instrument, Redemption Price, Percentage 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage    
Senior Secured Credit Facilities [Member]
     
Senior Notes [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage   2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_SeniorSecuredCreditFacilitiesMember
 
Base Rate plus Interest per Annum   1.25%dltr_BaseRateplusInterestperAnnum
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_SeniorSecuredCreditFacilitiesMember
 
Senior Secured Credit Facilities   $ 6,200,000,000dltr_SeniorSecuredCreditFacilities
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_SeniorSecuredCreditFacilitiesMember
 
Revolving Credit Facility [Member]
     
Senior Notes [Line Items]      
Senior Secured Credit Facilities   1,250,000,000dltr_SeniorSecuredCreditFacilities
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= us-gaap_RevolvingCreditFacilityMember
 
Term Loan Facilities [Member]
     
Senior Notes [Line Items]      
Senior Secured Credit Facilities   4,950,000,000dltr_SeniorSecuredCreditFacilities
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanFacilitiesMember
 
Term Loan A [Member]
     
Senior Notes [Line Items]      
Senior Secured Credit Facilities   1,000,000,000dltr_SeniorSecuredCreditFacilities
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanAMember
 
Quarterly Amortization Payments Percentage of Original Principal Amount in Year One   1.25%dltr_QuarterlyAmortizationPaymentsPercentageofOriginalPrincipalAmountinYearOne
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanAMember
 
Quarterly Amortization Payments Percentage of Original Principal Amount In Year Two   2.50%dltr_QuarterlyAmortizationPaymentsPercentageofOriginalPrincipalAmountInYearTwo
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanAMember
 
Quarterly Amortization Payments Percentage of Original Principal Amount after Year Three   3.75%dltr_QuarterlyAmortizationPaymentsPercentageofOriginalPrincipalAmountafterYearThree
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanAMember
 
Term Loan B [Member]
     
Senior Notes [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage   3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
Base Rate plus Interest per Annum   2.50%dltr_BaseRateplusInterestperAnnum
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
Senior Secured Credit Facilities   3,950,000,000dltr_SeniorSecuredCreditFacilities
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
LIBOR Floor Percentage Rate   0.75%dltr_LIBORFloorPercentageRate
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
Quarterly Amortization Percentage Payments of the Original Principal Amount after the closing   0.25%dltr_QuarterlyAmortizationPercentagePaymentsoftheOriginalPrincipalAmountaftertheclosing
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
Prepayment fee   1.00%dltr_Prepaymentfee
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ dltr_TermLoanAxis
= dltr_TermLoanBMember
 
2020 Senior Notes [Member]
     
Senior Notes [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage     5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dltr_SeniorNotesAxis
= dltr_A2020SeniorNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Senior Notes     750,000,000us-gaap_SeniorNotes
/ dltr_SeniorNotesAxis
= dltr_A2020SeniorNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
2023 Senior Notes [Member]
     
Senior Notes [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage     5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dltr_SeniorNotesAxis
= dltr_A2023SeniorNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Senior Notes     $ 2,500,000,000us-gaap_SeniorNotes
/ dltr_SeniorNotesAxis
= dltr_A2023SeniorNotesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember