Quarterly report [Sections 13 or 15(d)]

EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details)

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EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) $ 104 $ 99 $ 353 $ 325  
Payments to Acquire Interest in Joint Venture     255    
Total Remaining Joint Venture Contribution 551   551    
Investments and advances related to equity method investees 1,972   1,972   $ 1,889
Chongqing Cummins Engine Company, Ltd.          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 23 15 68 51  
Beijing Foton Cummins Engine Company          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 17 6 47 29  
Dongfeng Cummins Engine Company Ltd          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 13 14 52 51  
Tata Cummins, Ltd.          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 6 6 23 22  
All other manufacturers          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 6 7 27 41  
Komatsu Cummins Chile, Ltda. (Distribution)          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 12 15 41 42  
All other distributors          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) 5 3 17 10  
Cummin's Share of Equity Earnings          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) $ 82 66 $ 275 246  
Amplify Cell Technologies, LLC          
Schedule of Equity Method Investments [Line Items]          
Equity Method Investment, Ownership Percentage 30.00%   30.00%    
Partners Investment Ownership Percentage 10.00%   10.00%    
Investments and advances related to equity method investees $ 215   $ 215    
Royalty and interest income          
Schedule of Equity Method Investments [Line Items]          
Equity, royalty and interest income from investees (Note 4) $ 22 $ 33 $ 78 $ 79