Entity tax identification number Entity Tax Identification Number Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual Funds Mutual Fund [Member] Core account allocation one, percent EBP, Investment Options, Core Account Allocation Election One, Percentage EBP, Investment Options, Core Account Allocation Election One, Percentage EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Table] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Percentage of total contributions for a pay period, highly compensated EBP, Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Fully Benefit-Responsive Investment Contract [Abstract] Total investments, at fair value Total EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Level 1 Inputs Fair Value, Inputs, Level 1 [Member] Par value per share (in dollars per share) EBP, Net Asset Value per Share or Unit Investment Contracts EBP, Fully Benefit-Responsive Investment Contract [Text Block] EBP, Investment, Fair Value and NAV [Abstract] Total assets EBP, Asset Assets EBP, Asset [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] Additions EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Total liabilities EBP, Liability Amendment Flag Amendment Flag Percentage of total contributions for a pay period, not highly compensated EBP, Not Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Not Highly Compensated Participant Contribution, Pretax, Maximum Annual Compensation To Total Compensation, Percentage Basis of Accounting EBP, Basis of Accounting [Policy Text Block] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Vesting percentage EBP, Employer Contribution Vesting Percentage Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age Number of shares (in shares) EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] Summary of Fair Value EBP, Investment, Fair Value and NAV [Table Text Block] EBP, Contingency [Table] EBP, Contingency [Table] Core account allocation three, percent EBP, Investment Options, Core Account Allocation Election Three, Percentage EBP, Investment Options, Core Account Allocation Election Three, Percentage EBP, Contingency [Abstract] Investments [Domain] Investments [Domain] Use of Estimates EBP, Use of Estimate [Policy Text Block] Schedule H, Line 4i – Schedule of Assets (Held At End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Benefit payments requested by terminated vested participants EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Allocation to Withdrawing Participant, Not yet Paid Employer contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Synthetic Investment Contracts EBP, Synthetic Investment Contract [Member] Minimum Minimum [Member] EBP, Schedule of Reportable Transaction [Abstract] Dividends and interest receivable EBP, Investment Income, Receivable Investment Type [Axis] Investment Type [Axis] Employee contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Net appreciation, net of investment expenses EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number Percentage of total contributions for a payroll cycle of compensation, choice account allocation EBP, Participant Contribution To Choice Account, Pretax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Participant Contribution To Choice Account, Pretax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Description of the Plan EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] Schedule H, 4(j) - Schedule of Reportable Transactions EBP, Schedule of Reportable Transaction [Text Block] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] Interest EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Investment Stanley Black & Decker, Inc. Stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions to net assets EBP, Change in Net Asset Available for Benefit, Increase EBP, Schedule of Reportable Transaction [Table] EBP, Schedule of Reportable Transaction [Table] Involuntary cash-out limit EBP, Involuntary Cash-out Limit EBP, Involuntary Cash-out Limit Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Short-term Investments Short-Term Investments [Member] Investment, Identifier [Axis] Investment, Identifier [Axis] Administrative expenses Fees paid EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Total EBP, Asset Held for Investment Income credit to participants EBP, Income Credited To Participants EBP, Income Credited To Participants Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] Forfeited non-vested account amount EBP, Nonvested Account, Forfeited During Year EBP, Nonvested Account, Forfeited During Year EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] EBP, Schedule of Reportable Transaction [Line Items] EBP, Schedule of Reportable Transaction [Line Items] Participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Inputs Fair Value, Inputs, Level 2 [Member] EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Fully Benefit-Responsive Investment Contract [Line Items] EBP, Tax Status [Table] EBP, Tax Status [Table] Increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Related Parties and Parties-In-Interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Contribution receivable from employer EBP, Employer Contribution, Receivable Investments, at Fair Value: EBP, Investment, Fair Value [Abstract] Fixed Maturity Synthetic GICs EBP, Fixed Maturity Synthetic Investment Contract [Member] EBP, Fixed Maturity Synthetic Investment Contract Distributions EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Dividends EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Total investments EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Equity Fund, S&P 500 Index Fund Equity Fund, S&P 500 Index Fund [Member] Equity Fund, S&P 500 Index Fund Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Core account allocation two, percent EBP, Investment Options, Core Account Allocation Election Two, Percentage EBP, Investment Options, Core Account Allocation Election Two, Percentage Basis spread on variable rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Participant Loan, Basis Spread On Variable Rate EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Investments, at Contract Value: EBP, Investment, Contract Value [Abstract] EBP, Tax Status [Abstract] Schedule of Fully Benefit-Responsive Investment Contract EBP, Fully Benefit-Responsive Investment Contract [Table Text Block] Other liabilities EBP, Other Liability Expenses EBP, Expense [Policy Text Block] EBP 009 EBP 009 [Member] EBP 009 Loans to participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Investments, Income Recognition, Gains or Losses on Sales of Investments EBP, Investment [Policy Text Block] Contribution receivable from participants EBP, Participant Contribution, Receivable Document Type Document Type Entity Central Index Key Entity Central Index Key Constant Duration Synthetic GICs EBP, Constant Duration Synthetic Investment Contract [Member] EBP, Constant Duration Synthetic Investment Contract Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Common/Collective Trusts Common Collective Trust [Member] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Subsequent Event [Table] EBP, Subsequent Event [Table] Deductions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Forfeited nonvested account, decrease from employer contribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Notes receivable from participants EBP, Note Receivable from Participant Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name EBP, Subsequent Event [Abstract] Liabilities EBP, Liability [Abstract] Subsequent Events EBP, Subsequent Event [Text Block] Income Tax Status EBP, Tax Status [Text Block] Primary residence, borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Legal Proceedings EBP, Contingency [Text Block] Concentration of investments at fair value to total investments, percent EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Percentage EBP, Subsequent Event [Line Items] EBP, Subsequent Event [Line Items] EBP, Contingency [Line Items] EBP, Contingency [Line Items] Document Information [Table] Document Information [Table] Vesting period EBP, Employer Contribution Vesting Service Period Minimum Vesting service period for company contribution and/ or investment earning to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions. Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 Inputs Fair Value, Inputs, Level 3 [Member] Net assets available for benefits Net assets available for benefits at the beginning of the year Net assets available for benefits at the end of the year EBP, Net Asset Available for Benefit Total investments EBP, Investment, Excluding Plan Interest in Master Trust, Fair and Contract Value Entity [Domain] Entity [Domain] Total investment, at contract value EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Promissory note maturity period EBP, Asset Held For Investment, Participant Loan, Maturity Period EBP, Asset Held For Investment, Participant Loan, Maturity Period Forfeited non-vested account EBP, Forfeited Nonvested Account General loan, borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] Percentage of total contributions for a pay period, choice account allocation EBP, Participant Contribution To Choice Account, After Tax, Maximum Annual Compensation To Total Compensation, Percentage EBP, Participant Contribution To Choice Account, After Tax, Maximum Annual Compensation To Total Compensation, Percentage