| Document and Entity Information | Feb. 23, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0000093556 |
| Document Type | 8-K |
| Document Period End Date | Feb. 23, 2021 |
| Entity Registrant Name | Stanley Black & Decker, Inc. |
| Entity Incorporation State Country Code | CT |
| 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, State or Province | CT |
| Entity Address, Postal Zip Code | 06053 |
| City Area Code | (860) |
| Local Phone Number | 225-5111 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock SWK [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock - $2.50 Par Value per Share |
| Trading Symbol | SWK |
| Security Exchange Name | NYSE |
| Capital Units [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Corporate Units |
| Trading Symbol | SWT |
| Security Exchange Name | NYSE |
