Quarterly report [Sections 13 or 15(d)]

EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES - Summary of Equity, Royalty and Interest Income from Investees (Details)

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EQUITY, ROYALTY AND INTEREST INCOME FROM INVESTEES - Summary of Equity, Royalty and Interest Income from Investees (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees $ 148 $ 131
Chongqing Cummins Engine Company, Ltd.    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 29 23
Dongfeng Cummins Engine Company, Ltd.    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 23 20
Beijing Foton Cummins Engine Co., Ltd.    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 21 15
Tata Cummins, Ltd.    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 12 10
All other manufacturers    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 16 7
Komatsu Cummins Chile, Ltda.    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 14 14
All other distributors    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 8 8
Cummins share of net income    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees 123 97
Royalty and interest income    
Schedule of Equity Method Investments [Line Items]    
Equity, royalty and interest income (loss) from investees $ 25 $ 34