Quarterly report [Sections 13 or 15(d)]

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)

v3.26.1
ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 13,408 $ 11,308
Other comprehensive (loss) income before reclassifications    
Before-tax amount (138) 60
Tax benefit (expense) 3 22
After tax amount (135) 82
Amounts reclassified from accumulated other comprehensive income (loss) 8 (1)
Net current period other comprehensive (loss) income (127) 81
Ending balance 13,372 11,971
Total attributable to Cummins Inc.    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (2,278) (2,445)
Other comprehensive (loss) income before reclassifications    
Before-tax amount (110) 58
Tax benefit (expense) 3 22
After tax amount (107) 80
Amounts reclassified from accumulated other comprehensive income (loss) 8 (1)
Net current period other comprehensive (loss) income (99) 79
Ending balance (2,377) (2,366)
Change in pension and OPEB plans    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (912) (843)
Other comprehensive (loss) income before reclassifications    
Before-tax amount (31) (44)
Tax benefit (expense) 7 10
After tax amount (24) (34)
Amounts reclassified from accumulated other comprehensive income (loss) 9 7
Net current period other comprehensive (loss) income (15) (27)
Ending balance (927) (870)
Foreign currency translation adjustment    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (1,460) (1,717)
Other comprehensive (loss) income before reclassifications    
Before-tax amount (76) 104
Tax benefit (expense) (5) 11
After tax amount (81) 115
Amounts reclassified from accumulated other comprehensive income (loss) 0 0
Net current period other comprehensive (loss) income (81) 115
Ending balance (1,541) (1,602)
Unrealized gain (loss) on derivatives    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 94 115
Other comprehensive (loss) income before reclassifications    
Before-tax amount (3) (2)
Tax benefit (expense) 1 1
After tax amount (2) (1)
Amounts reclassified from accumulated other comprehensive income (loss) (1) (8)
Net current period other comprehensive (loss) income (3) (9)
Ending balance 91 106
Noncontrolling interests    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 1,059 1,037
Other comprehensive (loss) income before reclassifications    
Before-tax amount (28) 2
Tax benefit (expense) 0 0
After tax amount (28) 2
Amounts reclassified from accumulated other comprehensive income (loss) 0 0
Net current period other comprehensive (loss) income (28) 2
Ending balance $ 1,021 $ 1,047