Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Pro Forma [Member]
Pro Forma [Member]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-15
Accounting Standards Update 2016-15 [Member]
Accounting Standards Update 2016-02 [Member]
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash paid for debt extinguishment
Payment for Debt Extinguishment or Debt Prepayment Cost
Increase in assets
Assets
Increase in liabilities
Liabilities
New Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS
Fair Value Disclosures [Text Block]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
5.00% Note, Due 2021
Five Point Zero Percent Note, Due 2021 [Member]
Five Point Zero Percent Note, Due 2021 [Member]
5.25% Acquisition Notes, due 2020
Five Point Two Five Percent Notes Acquired in Acquisition, Due 2020 [Member]
5.25% Notes Acquired in Acquisition, Due 2020 [Member]
5.75% Acquisition Notes, due 2023
Five Point Seven Five Percent Notes Acquired in Acquisition, Due 2023 [Member]
Five Point Seven Five Percent Notes Acquired in Acquisition, Due 2023 [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Secured Senior Notes and Acquisition Notes
Secure Senior Notes and Acquisition Notes [Member]
Secured Senior Notes and Acquisition Notes
Long term debt - term loans
Long term debt - term loans [Member]
Long term debt - term loans
Senior Notes
Senior Notes [Member]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Fair Value, Inputs, Level 1
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred compensation plan assets
Deferred Compensation Plan Assets
Long-term debt, fair value
Long-term Debt, Fair Value
Long-term debt
Long-term Debt
Stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Income Tax Disclosure [Abstract]
Effective tax rate
Effective Income Tax Rate Reconciliation, Percent
Federal statutory tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Tax Cuts and Jobs Act, deferred tax liability, provisional income tax benefit
Tax Cuts And Jobs Act, Incomplete Accounting, Change In Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit
Tax Cuts And Jobs Act, Incomplete Accounting, Change In Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit
Tax Cuts and Jobs Act, decrease in effective tax rate
Tax Cuts And Jobs Act, Measurement Period Adjustment, Increase (Decrease) In Effective Tax Rate
Tax Cuts And Jobs Act, Measurement Period Adjustment, Increase (Decrease) In Effective Tax Rate
Statement of Comprehensive Income [Abstract]
Net income
Net Income (Loss) Attributable to Parent
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Total comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Commitments and Contingencies Disclosure [Abstract]
LEGAL PROCEEDINGS
Legal Matters and Contingencies [Text Block]
Income Taxes
Income Tax Disclosure [Text Block]
Weighted Average Number of Shares Outstanding (shares)
Weighted Average Number of Shares Outstanding, Basic
Basic net income per share (usd per share)
Earnings Per Share, Basic
Incremental Common Shares Attributable to Share-based Payment Arrangements
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted average number of shares and dilutive potential shares outstanding (shares)
Weighted Average Number of Shares Outstanding, Diluted
Diluted net income per share (usd per share)
Earnings Per Share, Diluted
Statement of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Merchandise inventories, net
Retail Related Inventory, Merchandise
Other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net of accumulated depreciation of $3,571.8, $3,192.1 and $3,060.1, respectively
Property, Plant and Equipment, Net
Assets available for sale
Assets Held-for-sale, Not Part of Disposal Group, Noncurrent
Assets Held-for-sale, Not Part of Disposal Group, Noncurrent
Goodwill
Goodwill
Favorable lease rights, net of accumulated amortization of $290.6, $230.9 and $224.7, respectively
Finite-Lived Intangible Asset, Off-market Lease, Favorable, Gross
Tradename intangible asset
Finite-Lived Trade Names, Gross
Other intangible assets, net
Other Intangible Assets, Net
Other assets
Other Assets, Noncurrent
Total assets
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Current liabilities:
Liabilities, Current [Abstract]
Current portion of long-term debt
Long-term Debt, Current Maturities
Accounts payable
Accounts Payable, Current
Income taxes payable
Accrued Income Taxes, Current
Other current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term debt, net, excluding current portion
Long-term Debt, Excluding Current Maturities
Unfavorable lease rights, net of accumulated amortization of $77.0, $61.1 and $57.0, respectively
Off-market Lease, Unfavorable
Deferred tax liabilities, net
Deferred Tax Liabilities, Net, Noncurrent
Income taxes payable, long-term
Accrued Income Taxes, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Total liabilities
Shareholders’ equity
Stockholders' Equity Attributable to Parent
Total liabilities and shareholders’ equity
Liabilities and Equity
Common shares outstanding
Common Stock, Shares, Outstanding
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
London Interbank Offered Rate (LIBOR)
London Interbank Offered Rate (LIBOR) [Member]
Letter of Credit
Letter of Credit [Member]
Term Loan Facility
Term Loan Facility [Member]
Term Loan Facility [Member]
Senior Floating Note
Senior Floating Note [Member]
Senior Floating Note [Member]
Fixed Rate Note
Fixed Rate Note [Member]
Fixed Rate Note [Member]
Acquisition Notes
Acquisition Notes [Member]
Acquisition Notes [Member]
3.70% Note, Due 2023
Three Point Seven Zero Percent Note, Due 2023 [Member]
Three Point Seven Zero Percent Note, Due 2023 [Member]
4.00% Note, Due 2025
Four Point Zero Percent Note, Due 2025 [Member]
Four Point Zero Percent Note, Due 2025 [Member]
4.20% Note, Due 2028
Four Point Two Zero Percent Note, Due 2028 [Member]
Four Point Two Zero Percent Note, Due 2028 [Member]
Term Loan B-2
Term Loan B-2 [Member]
Fixed-rate Term Loan B-2
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Senior Credit Facility
Senior Credit Facility [Member]
Senior Credit Facility [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Line of credit facility, utilized amount
Line of Credit Facility, Utilized Amount
Line of Credit Facility, Utilized Amount
Debt instrument, basis spread on variable rate
Debt Instrument, Basis Spread on Variable Rate
Registered offering, amount
Registered Offering, Amount
Registered Offering, Amount
Debt instrument, redemption price, percentage of principal amount redeemed
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed
Repayments of debt
Repayments of Debt
Acceleration of amortization of debt issuance costs
Acceleration of Amortization of Debt Issuance Costs
Acceleration of Amortization of Debt Issuance Costs due to prepayment
Debt instrument, face amount
Debt Instrument, Face Amount
Debt, prepayment premium, amount
Debt, Prepayment Premium, Amount
Debt, Prepayment Premium, Amount
Debt, prepayment premium, percent
Debt, Prepayment Premium, Percent
Debt, Prepayment Premium, Percent
Redemption premium
Redemption Premium
Redemption premium, percentage
Redemption Premium, Percentage
Redemption Premium, Percentage
Accelerated amortizable non-cash deferred financing costs
Accelerated Amortizable Non-cash Deferred Financing Costs
Accelerated Amortizable Non-cash Deferred Financing Costs
Amortization of debt transaction-related costs
Amortization of Debt Transaction-related Costs
Amortization of Debt Transaction-related Costs
Deferred financing costs
Deferred Financing Costs
Deferred Financing Costs
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Geographical [Axis]
Geographical [Axis]
Geographical [Domain]
Geographical [Domain]
CANADA
CANADA
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Dollar Tree
Dollar Tree [Member]
Dollar Tree
Family Dollar
Family Dollar [Member]
Family Dollar [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Net sales
Revenue from Contract with Customer, Excluding Assessed Tax
Gross profit
Gross Profit
Depreciation and amortization expense
Depreciation and Amortization, Net of Currency Translation
Depreciation and Amortization, Net of Currency Translation
Operating income (loss)
Operating Income (Loss)
Capital expenditures
Capital Expenditures
Capital Expenditures
Assets
Goodwill
Number of retail discount stores
Number of retail discount stores
Number of retail discount stores
Number of states stores operating in
Number of states stores operating in
Number of states stores operating in
Number Of Canadian provinces
Number Of Canadian Provinces
Number Of Canadian Provinces
Number of reportable segments
Number of Reportable Segments
Price Point
Price Point
Fixed price for offering merchandise in discount variety stores
Number of distribution centers
Number Of Distribution Centers
Number Of Distribution Centers
Goodwill, transfers in (out)
Goodwill, Transfers
Document and Entity Information [Text Block] [Abstract]
Document and Entity Information [Text Block] [Abstract]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Document Type
Document Type
Amendment Flag
Amendment Flag
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Small Business
Entity Small Business
Document Period End Date
Document Period End Date
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Income Statement [Abstract]
Net sales
Cost of sales
Cost of Goods and Services Sold
Gross profit
Selling, general and administrative expenses, excluding Receivable impairment
Selling, General and Administrative Expense, Excluding Receivable Impairment
Selling, General and Administrative Expense, Excluding Receivable Impairment
Receivable impairment
Asset Impairment Charges
Selling, general and administrative expenses, excluding Receivable impairment
Selling, General and Administrative Expense
Operating income
Interest expense, net
Interest Income (Expense), Net
Other (income) expense, net
Other Nonoperating Income (Expense)
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax expense
Income Tax Expense (Benefit)
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Award Type [Axis]
Award Type [Domain]
Equity Award [Domain]
Restricted Stock Units (RSUs)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense
Share-based Compensation
Compensation expense, period
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Number of shares, beginning (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Number of shares, granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Number of shares, vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Number of shares, forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Number of shares, end (in shares)
Number of shares, beginning (USD per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Number of shares, granted (USD per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Number of shares, vested (USD per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Number of shares, forfeited (USD per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Number of shares, ending (USD per share)
SEGMENTS
Segment Reporting Disclosure [Text Block]
Schedule of Segment Reporting Information, by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Forgivable Promissory Notes
Notes Payable, Forgivable Promissory Notes [Member]
Notes Payable, Forgivable Promissory Notes [Member]
Loans Payable
Loans Payable [Member]
Line of Credit
Line of Credit [Member]
Term Loan A-1
Term Loan A-1 [Member]
Term Loan A-1 [Member]
Tranche A Revolving Credit Facility
Tranche A Revolving Credit Facility [Member]
Tranche A Revolving Credit Facility [Member]
Debt instrument, unamortized discount (premium) and debt issuance costs, net
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Debt instrument, interest rate, effective percentage
Debt Instrument, Interest Rate, Effective Percentage
Loss contingency, number of plaintiffs
Loss Contingency, Number of Plaintiffs
NET INCOME PER SHARE
Earnings Per Share [Text Block]
Schedule of Long-term Debt Instruments
Schedule of Long-term Debt Instruments [Table Text Block]
BASIS OF PRESENTATION
Basis of Presentation and Significant Accounting Policies [Text Block]
LONG-TERM DEBT
Debt Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation and amortization
Depreciation, Depletion and Amortization
Provision for deferred taxes
Deferred Income Tax Expense (Benefit)
Amortization of debt discount and debt-issuance costs
Amortization of Debt Issuance Costs and Discounts
Other non-cash adjustments to net income
Other Noncash Income (Expense)
Loss on debt extinguishment
Gain (Loss) on Extinguishment of Debt
Changes in operating assets and liabilities
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures
Payments to Acquire Property, Plant, and Equipment
Proceeds from sale of restricted and unrestricted investments
Proceeds from Sale, Maturity and Collection of Investments
Proceeds from (payments for) fixed asset disposition
Gain (Loss) on Disposition of Property Plant Equipment
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Principal payments for long-term debt
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities
Proceeds from long-term debt, net of discount
Proceeds from Issuance of Long-term Debt
Debt-issuance and debt extinguishment costs
Payments of Debt Issuance Costs
Repayments of revolving credit facility
Repayments of Lines of Credit
Proceeds from revolving credit facility
Proceeds from Lines of Credit
Proceeds from stock issued pursuant to stock-based compensation plans
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options
Cash paid for taxes on exercises/vesting of stock-based compensation
Payments Related to Tax Withholding for Share-based Compensation
Net cash used in financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of exchange rate changes on cash and cash equivalents
Effect of Exchange Rate on Cash and Cash Equivalents
Net decrease in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Supplemental disclosure of cash flow information:
Supplemental Cash Flow Information [Abstract]
Cash paid for:
Cash paid for [Abstract]
-- None. No documentation exists for this element. --
Interest, net of amounts capitalized
Interest Paid, Excluding Capitalized Interest, Operating Activities
Income taxes
Income Taxes Paid, Net
Non-cash transactions:
Non-cash transaction [Abstract]
Non-cash transaction [Abstract]
Accrued capital expenditures
Capital Expenditures Incurred but Not yet Paid
Accumulated Depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated Amortization, Favorable Lease Rights
Accumulated Amortization, Favorable Lease Rights
Accumulated Amortization, Favorable Lease Rights
Accumulated Amortization, Unfavorable Lease Rights
Accumulated Amortization, Unfavorable Lease Rights
Accumulated Amortization, Unfavorable Lease Rights