Dollar Tree, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Short-Term Borrowings and Long-Term Debt - Narrative (Details)

Short-Term Borrowings and Long-Term Debt - Narrative (Details) - USD ($)					12 Months Ended
	May 15, 2025	Mar. 21, 2025	Dec. 08, 2021	Apr. 19, 2018	Jan. 31, 2026	Feb. 01, 2025	Feb. 03, 2024	Mar. 20, 2026	Nov. 10, 2025	Jul. 31, 2023
Debt Instrument [Line Items]
Borrowing capacity					$ 85,000,000.0
Long-term debt					$ 2,431,700,000	$ 3,431,200,000
Commercial Paper
Debt Instrument [Line Items]
Short-Term Debt, Term					397 days
Debt Instrument, Face Amount					$ 10,100,000,000	3,200,000,000	$ 1,100,000,000		$ 2,500,000,000	$ 1,500,000,000
Repayments of Debt					10,100,000,000	3,200,000,000	1,100,000,000
Interest Expense, Nonoperating					15,800,000	3,900,000	2,600,000
Short-term borrowings					0	0
$1.5B Revolving Credit Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Short-term borrowings					0
Borrowing capacity					1,500,000,000
364-Day Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Short-term borrowings					$ 0
364-Day Credit Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity		$ 1,000,000,000.0
Basis spread on variable rate		1.00%
Interest rate at period end					4.89%
Debt term		364 days
New Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt term		5 years
Long-term debt					$ 0
Five-Year Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt term		5 years	5 years
Long-term debt					0	0	$ 0
Five-Year Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Long-term debt					$ 0	$ 3,800,000
Line of Credit \| New Credit Facility \| Revolving Credit Facility \| Forecast
Debt Instrument [Line Items]
Borrowing capacity								$ 1,500,000,000
Line of Credit \| Five-Year Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowing capacity		$ 1,500,000,000	$ 1,500,000,000
Line of Credit \| Five-Year Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Borrowing capacity		$ 350,000,000.0
Senior Notes \| Senior Floating Rate Notes Due 2020
Debt Instrument [Line Items]
Percentage of principal amount redeemed in event of change of control				101.00%
Senior Notes \| 4.00% Senior Notes, due May 2025
Debt Instrument [Line Items]
Proceeds from long-term debt, net of discount	$ 1,000,000,000.0
Stated percentage	4.00%				4.00%
Senior Notes \| 4.20% Senior Notes, due May 2028
Debt Instrument [Line Items]
Stated percentage					4.20%
Senior Notes \| 2.65% Senior Notes, due December 2031
Debt Instrument [Line Items]
Stated percentage					2.65%
Senior Notes \| 3.375% Senior Notes, due December 2051
Debt Instrument [Line Items]
Stated percentage					3.375%