DOCUMENT COVER Document
| DOCUMENT COVER Document | Oct. 29, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2019 |
| Entity Registrant Name | CUMMINS INC. |
| Entity Incorporation, State or Country Code | IN |
| Entity File Number | 1-4949 |
| Entity Tax Identification Number | 35-0257090 |
| Entity Address, Address Line One | 500 Jackson Street |
| Entity Address, Address Line Two | P. O. Box 3005 |
| Entity Address, City or Town | Columbus |
| Entity Address, State or Province | IN |
| Entity Address, Postal Zip Code | 47202-3005 |
| City Area Code | 812 |
| Local Phone Number | 377-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $2.50 par value |
| Trading Symbol | CMI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000026172 |
| Amendment Flag | false |