Quarterly report [Sections 13 or 15(d)]

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)

v3.26.3
ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 13,906 $ 12,873 $ 13,408 $ 11,308
Other comprehensive (loss) income before reclassifications        
Before-tax amount (28) (62) (134) 176
Tax benefit (expense) 2 (2) 5 41
After-tax amount (26) (64) (129) 217
Amounts reclassified from accumulated other comprehensive income (loss) 5 2 20 3
Net current period other comprehensive income (loss) (21) (62) (109) 220
Ending balance 14,346 13,098 14,346 13,098
Total attributable to Cummins Inc.        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (2,340) (2,167) (2,278) (2,445)
Other comprehensive (loss) income before reclassifications        
Before-tax amount (22) (44) (102) 190
Tax benefit (expense) 2 (2) 5 41
After-tax amount (20) (46) (97) 231
Amounts reclassified from accumulated other comprehensive income (loss) 5 2 20 3
Net current period other comprehensive income (loss) (15) (44) (77) 234
Ending balance (2,355) (2,211) (2,355) (2,211)
Change in pension and OPEB plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (919) (863) (912) (843)
Other comprehensive (loss) income before reclassifications        
Before-tax amount 0 (1) (32) (45)
Tax benefit (expense) 0 2 7 12
After-tax amount 0 1 (25) (33)
Amounts reclassified from accumulated other comprehensive income (loss) 9 7 27 21
Net current period other comprehensive income (loss) 9 8 2 (12)
Ending balance (910) (855) (910) (855)
Foreign currency translation adjustment        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (1,520) (1,407) (1,460) (1,717)
Other comprehensive (loss) income before reclassifications        
Before-tax amount (34) (45) (92) 232
Tax benefit (expense) 5 (4) 3 29
After-tax amount (29) (49) (89) 261
Amounts reclassified from accumulated other comprehensive income (loss) 0 0 0 0
Net current period other comprehensive income (loss) (29) (49) (89) 261
Ending balance (1,549) (1,456) (1,549) (1,456)
Unrealized gain (loss) on derivatives        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 99 103 94 115
Other comprehensive (loss) income before reclassifications        
Before-tax amount 12 2 22 3
Tax benefit (expense) (3) 0 (5) 0
After-tax amount 9 2 17 3
Amounts reclassified from accumulated other comprehensive income (loss) (4) (5) (7) (18)
Net current period other comprehensive income (loss) 5 (3) 10 (15)
Ending balance 104 100 104 100
Noncontrolling interests        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 1,059 1,084 1,059 1,037
Other comprehensive (loss) income before reclassifications        
Before-tax amount (6) (18) (32) (14)
Tax benefit (expense) 0 0 0 0
After-tax amount (6) (18) (32) (14)
Amounts reclassified from accumulated other comprehensive income (loss) 0 0 0  
Net current period other comprehensive income (loss) (6) (18) (32) (14)
Ending balance $ 1,015 $ 1,034 $ 1,015 $ 1,034