| Document and Entity Information Document | Apr. 30, 2020 |
| Document Information [Line Items] | |
| Written Communications | false |
| Soliciting Material | false |
| Entity Central Index Key | 0000093556 |
| Entity Registrant Name | CT |
| Document Type | 8-K |
| Entity File Number | 1-5224 |
| Entity Tax Identification Number | 06-0548860 |
| Entity Address, Address Line One | 1000 STANLEY DRIVE |
| Entity Address, City or Town | NEW BRITAIN |
| Entity Address, Postal Zip Code | 06053 |
| Entity Address, State or Province | CT |
| Document Period End Date | Apr. 30, 2020 |
| Entity Registrant Name | Stanley Black & Decker, Inc. |
| City Area Code | 860 |
| Local Phone Number | 225-5111 |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Common Stock $2.50 Par Value Per Share [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | SWK |
| Security Exchange Name | NYSE |
| Corporate Units - SWP [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Corporate Units |
| Trading Symbol | SWP |
| Security Exchange Name | NYSE |
| Corporate Units - SWT [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Corporate Units |
| Trading Symbol | SWT |
| Security Exchange Name | NYSE |
