Dollar Tree, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (Details)

LONG-TERM DEBT (Details)				12 Months Ended
LONG-TERM DEBT (Details)	Jan. 20, 2017 USD ($)	Jan. 26, 2016 USD ($)	Mar. 09, 2015 USD ($)	Jan. 28, 2017 USD ($)	Jan. 30, 2016 USD ($)	Jan. 31, 2015 USD ($)	Oct. 29, 2016 USD ($)	Jul. 06, 2015 USD ($)	Jun. 11, 2015 USD ($)	Feb. 23, 2015 USD ($)	Jan. 28, 2012 USD ($)
Debt Instrument [Line Items]
Repayments of Lines of Credit				$ 140,000,000	$ 0	$ 0
Long-term Debt				$ 6,391,800,000	7,465,500,000
Term Loan A Repayment Period				5 years
Days Outstanding prior to stated maturity				91 days
Term Loan B Repayment Period				7 years
Term Loan B-1 Loan Prepayment Amount		1,000,000,000
Acceleration of Amortization of Debt Issuance Costs		$ 19,000,000
Forgivable Promissory Note Repayment Period				5 years
Forgivable Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage						1.00%
Long-Term Debt											$ 7,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount								$ 750,000,000.0
Accrued interest, unpaid interest and make whole premium								$ 89,500,000
Senior Notes [Member] \| September 16, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								4.03%
Borrowing capacity								$ 300,000,000.0
Senior Notes [Member] \| September 16, 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								4.63%
Borrowing capacity								$ 350,000,000.0
Senior Notes [Member] \| September 16, 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage								4.78%
Borrowing capacity								$ 100,000,000.0
Senior Notes [Member] \| Five Point Two Five Percent Notes Acquired in Acquisition, Due 2020 [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 750,000,000.0
Debt Instrument, Interest Rate, Stated Percentage				5.25%			5.25%			5.25%
Long-term Debt				$ 750,000,000	750,000,000		$ 750,000,000
Senior Notes [Member] \| Five Point Seven Five Percent Notes Acquired in Acquisition, Due 2023 [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 2,500,000,000.0
Debt Instrument, Interest Rate, Stated Percentage				5.75%			5.75%			5.75%
Long-term Debt				$ 2,500,000,000	2,500,000,000		$ 2,500,000,000
Senior Notes [Member] \| Acquisition Notes [Member] \| Debt Covenant, Maximum Ratio for Ability to Pay Dividends [Member]
Debt Instrument [Line Items]
Consolidated Total Net Leverage Ratio				3.50
Line of Credit [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 0	0
Borrowing capacity				$ 1,250,000,000.00
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			2.25%
Line of Credit [Member] \| Term Loan A-1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Quarterly Amortization Payment, Percentage of Original Principal			1.25%
Line of Credit [Member] \| Term B-3 Loans [Member]
Debt Instrument [Line Items]
Repayments of Lines of Credit	$ 748,100,000
Acceleration of Amortization of Debt Issuance Costs	$ 11,700,000
Line of Credit [Member] \| Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Aggregate principal amount			$ 6,200,000,000.0
Line of Credit [Member] \| Senior Secured Credit Facilities [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate principal amount			$ 1,250,000,000.00
Line of Credit [Member] \| Senior Secured Credit Facilities [Member] \| Debt Covenant, Maximum Ratio for Ability to Pay Dividends [Member]
Debt Instrument [Line Items]
Consolidated Total Net Leverage Ratio				3.50
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage				2.53%
Long-term Debt				$ 0	0
Debt Instrument, Basis Spread on Variable Rate				1.75%
Borrowing capacity				$ 1,250,000,000.00
Loans Payable [Member]
Debt Instrument [Line Items]
Prepayment Fee If Loans Subject to Certain Repricing Transactions, Amount									$ 69,100,000
Loans Payable [Member] \| Prepayment Risk [Member]
Debt Instrument [Line Items]
Prepayment fee if Loans Subject to Certain Repricing Transactions									1.00%
Loans Payable [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									2.75%
Base Rate plus Interest per Annum			1.25%						1.75%
Quarterly Amortization Payments Percentage of Original Principal Amount Year Two			2.50%
Quarterly Amortization Payments Percentage of Original Principal Amount Beyond Year Two			3.75%
Quarterly Amortization Payments of Original Principal Amount after Closing									0.25%
Prepayment fee second year									2.00%
Prepayment fee third year									1.00%
Loans Payable [Member] \| Term Loan A-1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Effective Percentage				2.53%
Long-term Debt				$ 2,184,800,000	0
Loans Payable [Member] \| Term Loan A-1 [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.75%
Loans Payable [Member] \| Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Aggregate principal amount			$ 4,950,000,000.00
Loans Payable [Member] \| Term Loan A [Member]
Debt Instrument [Line Items]
Long-term Debt			1,000,000,000	$ 0	975,000,000
Loans Payable [Member] \| Term Loan B-1 [Member]
Debt Instrument [Line Items]
Long-term Debt			$ 3,950,000,000	$ 0	2,283,500,000
Debt Instrument, Unamortized Discount, Percent			0.50%
Debt Instrument, Unamortized Discount			$ 19,800,000
Senior Secured Credit Facilities									$ 3,300,000,000.0
Loans Payable [Member] \| Term Loan B-1 [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.75%
Loans Payable [Member] \| Term Loan B-2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.25%					4.25%
Long-term Debt				$ 650,000,000	650,000,000
Senior Secured Credit Facilities									$ 650,000,000
Unsecured Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				5.00%				5.00%
Long-term Debt				$ 300,000,000	$ 300,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt								$ 300,000,000.0