v3.10.0.1
Document and Entity Information - USD ($)
$ / shares in Units, $ in Billions
12 Months Ended
Dec. 31, 2018
Feb. 01, 2019
Jul. 01, 2018
Dec. 31, 2017
Document and Entity Information        
Entity Registrant Name CUMMINS INC.      
Entity Central Index Key 0000026172      
Document Period End Date Dec. 31, 2018      
Entity Filer Category Large Accelerated Filer      
Document Type 10-K      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2018      
Document Fiscal Period Focus FY      
Amendment Flag false      
Entity Emerging Growth Company false      
Entity Shell Company false      
Entity Small Business false      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Common Stock, Shares Outstanding   157,338,874    
Entity Public Float     $ 21.7  
Common Stock, Par or Stated Value Per Share $ 2.50 $ 2.50   $ 2.50