Annual report pursuant to Section 13 and 15(d)


$ / shares in Units, $ in Billions
12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2019
Dec. 31, 2018
DOCUMENT COVER [Abstract]        
Document Type 10-K      
Document Period End Date Dec. 31, 2019      
Entity File Number 1-4949      
Entity Registrant Name CUMMINS INC.      
Entity Incorporation, State or Country Code IN      
Entity Tax Identification Number 35-0257090      
Entity Address, Address Line One 500 Jackson Street      
Entity Address, Address Line Two 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      
Title of 12(b) Security Common stock, $2.50 par value      
Trading Symbol CMI      
Security Exchange Name NYSE      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Filer Category Large Accelerated Filer      
Entity Small Business false      
Entity Emerging Growth Company false      
Entity Shell Company false      
Entity Public Float     $ 27.0  
Entity Common Stock, Shares Outstanding   150,269,665    
Common Stock, Par or Stated Value Per Share $ 2.50     $ 2.50
Entity Central Index Key 0000026172      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2019      
Document Fiscal Period Focus FY      
Document Annual Report true      
Amendment Flag false      
Document Transition Report false