Quarterly report [Sections 13 or 15(d)]

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Revenue by External Sales (Details)

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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Revenue by External Sales (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Total net sales $ 9,438 $ 8,317 $ 27,293 $ 25,134
China        
Disaggregation of Revenue [Line Items]        
Total net sales 974 844 3,048 2,449
India        
Disaggregation of Revenue [Line Items]        
Total net sales 466 447 1,383 1,288
Engine        
Disaggregation of Revenue [Line Items]        
Total net sales 2,389 1,922 6,704 6,124
Engine | Total on-highway        
Disaggregation of Revenue [Line Items]        
Total net sales 2,066 1,656 5,691 5,320
Engine | Heavy-duty truck        
Disaggregation of Revenue [Line Items]        
Total net sales 803 540 2,105 1,921
Engine | Medium-duty truck and bus        
Disaggregation of Revenue [Line Items]        
Total net sales 767 533 2,152 1,909
Engine | Light-duty automotive        
Disaggregation of Revenue [Line Items]        
Total net sales 496 583 1,434 1,490
Engine | Off-highway        
Disaggregation of Revenue [Line Items]        
Total net sales 323 266 1,013 804
Components        
Disaggregation of Revenue [Line Items]        
Total net sales 2,397 1,986 6,966 6,551
Components | Drivetrain and braking systems        
Disaggregation of Revenue [Line Items]        
Total net sales 1,107 916 3,144 3,066
Components | Emission solutions        
Disaggregation of Revenue [Line Items]        
Total net sales 837 702 2,497 2,270
Components | Components and software        
Disaggregation of Revenue [Line Items]        
Total net sales 308 281 968 888
Components | Automated transmissions        
Disaggregation of Revenue [Line Items]        
Total net sales 145 87 357 327
Distribution        
Disaggregation of Revenue [Line Items]        
Total net sales 3,307 3,170 9,736 9,106
Distribution | North America        
Disaggregation of Revenue [Line Items]        
Total net sales 2,302 2,200 6,823 6,373
Distribution | Asia Pacific        
Disaggregation of Revenue [Line Items]        
Total net sales 367 311 1,013 831
Distribution | Europe        
Disaggregation of Revenue [Line Items]        
Total net sales 285 273 888 865
Distribution | China        
Disaggregation of Revenue [Line Items]        
Total net sales 143 121 393 357
Distribution | India        
Disaggregation of Revenue [Line Items]        
Total net sales 95 93 271 256
Distribution | Africa and Middle East        
Disaggregation of Revenue [Line Items]        
Total net sales 69 74 195 193
Distribution | Latin America        
Disaggregation of Revenue [Line Items]        
Total net sales 46 98 153 231
Distribution | Power generation        
Disaggregation of Revenue [Line Items]        
Total net sales 1,328 1,246 3,976 3,536
Distribution | Parts        
Disaggregation of Revenue [Line Items]        
Total net sales 1,049 1,014 3,190 3,051
Distribution | Service        
Disaggregation of Revenue [Line Items]        
Total net sales 482 494 1,385 1,349
Distribution | Engines        
Disaggregation of Revenue [Line Items]        
Total net sales 448 416 1,185 1,170
Power Systems        
Disaggregation of Revenue [Line Items]        
Total net sales 1,250 1,126 3,560 3,052
Power Systems | Power generation        
Disaggregation of Revenue [Line Items]        
Total net sales 742 623 2,126 1,652
Power Systems | Industrial        
Disaggregation of Revenue [Line Items]        
Total net sales 301 323 892 905
Power Systems | Generator technologies        
Disaggregation of Revenue [Line Items]        
Total net sales $ 207 $ 180 $ 542 $ 495