Annual report [Section 13 and 15(d), not S-K Item 405]

REVENUE RECOGNITION DISAGGREGATION OF REVENUES REVENUE RECOGNITION DISAGGREGATION OF REVENUES (Details)

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REVENUE RECOGNITION DISAGGREGATION OF REVENUES REVENUE RECOGNITION DISAGGREGATION OF REVENUES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]      
Net sales $ 33,670 $ 34,102 $ 34,065
Heavy-duty truck (EBU market)      
Disaggregation of Revenue [Line Items]      
Net sales 2,544 3,320 3,391
Medium-duty truck and bus (EBU market)      
Disaggregation of Revenue [Line Items]      
Net sales 2,547 3,100 2,622
Light-duty automotive (EBU market)      
Disaggregation of Revenue [Line Items]      
Net sales 1,930 1,585 1,748
On-highway (EBU market)      
Disaggregation of Revenue [Line Items]      
Net sales 7,021 8,005 7,761
Off-highway (EBU market)      
Disaggregation of Revenue [Line Items]      
Net sales 1,083 982 1,113
Drivetrain and braking systems [CBU business]      
Disaggregation of Revenue [Line Items]      
Net sales 3,983 4,731 4,822
Emission solutions (CBU business)      
Disaggregation of Revenue [Line Items]      
Net sales 3,034 3,180 3,425
Engine Components and Software [CBU business]      
Disaggregation of Revenue [Line Items]      
Net sales 1,203 1,106 1,225
Automated Transmission [CBU business]      
Disaggregation of Revenue [Line Items]      
Net sales 423 588 714
Atmus - Filtration (CBU business)      
Disaggregation of Revenue [Line Items]      
Net sales 0 289 1,345
Power Generation (DBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 4,928 3,961 2,496
Parts (DBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 4,073 3,966 4,052
Service (DBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 1,798 1,747 1,664
Engine (DBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 1,587 1,678 1,987
Power Generation (PSBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 2,229 1,896 1,698
Industrial (PSBU product line)      
Disaggregation of Revenue [Line Items]      
Net sales 1,238 1,130 970
Generator technologies (PSBU product lines)      
Disaggregation of Revenue [Line Items]      
Net sales 647 474 457
Engine      
Disaggregation of Revenue [Line Items]      
Net sales 10,875 11,712 11,684
Components      
Disaggregation of Revenue [Line Items]      
Net sales 10,149 11,679 13,409
Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 12,405 11,384 10,249
Power Systems      
Disaggregation of Revenue [Line Items]      
Net sales 7,463 6,408 5,673
External Sales | Engine      
Disaggregation of Revenue [Line Items]      
Net sales 8,104 8,987 8,874
External Sales | Components      
Disaggregation of Revenue [Line Items]      
Net sales 8,643 9,894 11,531
External Sales | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 12,386 11,352 10,199
External Sales | Power Systems      
Disaggregation of Revenue [Line Items]      
Net sales 4,114 3,500 3,125
UNITED STATES      
Disaggregation of Revenue [Line Items]      
Net sales 18,974 19,422 19,302
CHINA      
Disaggregation of Revenue [Line Items]      
Net sales 3,298 2,948 3,115
CHINA | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 509 469 424
INDIA      
Disaggregation of Revenue [Line Items]      
Net sales 1,721 1,779 1,678
INDIA | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 363 310 264
OTHER INTERNATIONAL      
Disaggregation of Revenue [Line Items]      
Net sales 9,677 9,953 9,970
NORTH AMERICA | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 8,619 7,617 7,054
ASIA PACIFIC | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 1,150 1,243 1,091
EUROPE | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 1,186 1,179 848
AFRICA and MIDDLE EAST | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales 266 268 294
LATIN AMERICA | Distribution      
Disaggregation of Revenue [Line Items]      
Net sales $ 293 $ 266 $ 224