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)											1 Months Ended	3 Months Ended	12 Months Ended
LONG-TERM DEBT (Details)	Mar. 01, 2018 USD ($)	Jan. 30, 2018 USD ($)	Jul. 27, 2017 USD ($)	Jan. 28, 2017 USD ($)	Jan. 20, 2017 USD ($)	Sep. 22, 2016 USD ($)	Aug. 30, 2016 USD ($)	Jan. 26, 2016 USD ($)	Jul. 06, 2015 USD ($)	Mar. 09, 2015 USD ($)	Sep. 22, 2016 USD ($)	Feb. 03, 2018 USD ($)	Feb. 03, 2018 USD ($)	Jan. 28, 2017 USD ($)	Jan. 30, 2016 USD ($)	Apr. 15, 2017	Jan. 13, 2017	Oct. 29, 2016 USD ($)	Jun. 11, 2015 USD ($)	Feb. 23, 2015 USD ($)	Jan. 28, 2012 USD ($)
Debt Instrument [Line Items]
Prepaid outstanding balance													$ 0	$ 140,000,000	$ 0
Make-whole premium													301,800,000	375,500,000	$ 599,400,000
Long-term Debt				$ 6,391,800,000								$ 5,732,700,000	$ 5,732,700,000	6,391,800,000
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
Non-operating gain on forgiveness of loan												$ 7,400,000
Forgivable Loan [Member]
Debt Instrument [Line Items]
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%		5.25%
Call for redemption of 2020 Notes		$ 750,000,000
Make-whole premium													$ 9,800,000
Long-term Debt				750,000,000								$ 750,000,000	$ 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%		5.75%
Long-term Debt				$ 2,500,000,000								$ 2,500,000,000	$ 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	3.50
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage							0.30%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.25%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.38%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate							1.75%			2.25%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate							0.75%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Line of Credit [Member] \| Tranche A Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Line of Credit [Member] \| Term Loan A-1 [Member]
Debt Instrument [Line Items]
Aggregate principal amount						$ 1,275,000,000					$ 1,275,000,000
Prepaid outstanding balance			$ 500,000,000
Outstanding balance prior to prepayment			2,200,000,000
Debt Instrument, Quarterly Amortization Payment, Percentage of Original Principal										1.25%						1.88%	1.25%
Amortization of Debt Transaction-related Costs			$ 1,200,000
Line of Credit [Member] \| Term Loan A [Member]
Debt Instrument [Line Items]
Long-term Debt							$ 937,500,000
Line of Credit [Member] \| Term Loan B-1 [Member]
Debt Instrument [Line Items]
Aggregate principal amount						2,025,000,000					2,025,000,000
Prepaid outstanding balance						242,000,000
Line of Credit [Member] \| Term B-3 Loans [Member]
Debt Instrument [Line Items]
Aggregate principal amount						$ 750,000,000					750,000,000
Prepaid outstanding balance					$ 748,100,000
Debt Instrument, Quarterly Amortization Payment, Percentage of Original Principal																	0.30%
Acceleration of Amortization of Debt Issuance Costs					$ 11,700,000
Line of Credit [Member] \| Term B-3 Loans [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate						2.50%
Line of Credit [Member] \| Term B-3 Loans [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate						1.50%
Line of Credit [Member] \| Senior Secured Credit Facilities [Member]
Debt Instrument [Line Items]
Aggregate principal amount										$ 6,200,000,000.0
Amortization of Debt Issuance Costs											26,600,000
Amortization of Debt Transaction-related Costs											$ 2,600,000
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	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												3.08%	3.08%
Long-term Debt				$ 0								$ 0	$ 0	0
Basis spread on variable rate													1.50%
Borrowing capacity												$ 1,250,000,000.00	$ 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												3.08%	3.08%
Long-term Debt				2,184,800,000								$ 1,532,700,000	$ 1,532,700,000	2,184,800,000
Loans Payable [Member] \| Term Loan A-1 [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate													1.50%
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
Loans Payable [Member] \| Term Loan B-1 [Member]
Debt Instrument [Line Items]
Long-term Debt										$ 3,950,000,000
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]
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%						4.25%
Long-term Debt				650,000,000								$ 650,000,000	$ 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%	5.00%
Debt Instrument, Redemption Price, Percentage									100.00%
Long-term Debt				$ 300,000,000								$ 300,000,000	$ 300,000,000	$ 300,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt									$ 300,000,000.0
Unsecured Senior Notes [Member] \| Specified Treasury Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate									30.00%
Subsequent Event [Member] \| Senior Notes [Member] \| Five Point Two Five Percent Notes Acquired in Acquisition, Due 2020 [Member]
Debt Instrument [Line Items]
Redemption of 2020 notes	$ 759,800,000
Amortizable non-cash deferred financing costs	$ 6,100,000