Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)

v3.20.4
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period $ (2,028)    
Before tax amount (70) $ (276) $ (382)
Tax benefit (expense) 43 27 7
After tax amount (27) (249) (375)
Amounts reclassified from accumulated other comprehensive income(1) 63 23 42
Net current period other comprehensive (loss) income 36 (226) (333)
Balance at the end of period (1,982) (2,028)  
Total attributable to Cummins Inc.      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (2,028) (1,807) (1,503)
Before tax amount (60) (271) (352)
Tax benefit (expense) 43 27 7
After tax amount (17) (244) (345)
Amounts reclassified from accumulated other comprehensive income(1) 63 23 41
Net current period other comprehensive (loss) income 46 (221) (304)
Balance at the end of period (1,982) (2,028) (1,807)
Change in pensions and other postretirement defined benefit plans      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (734) (671) (689)
Before tax amount (92) (106) (42)
Tax benefit (expense) 26 16 7
After tax amount (66) (90) (35)
Amounts reclassified from accumulated other comprehensive income(1) 65 27 53
Net current period other comprehensive (loss) income (1) (63) 18
Balance at the end of period (735) (734) (671)
Foreign currency translation adjustment      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (1,285) (1,138) (812)
Before tax amount 73 (153) (333)
Tax benefit (expense) 8 6 7
After tax amount 81 (147) (326)
Amounts reclassified from accumulated other comprehensive income(1) 0 0  
Net current period other comprehensive (loss) income 81 (147) (326)
Balance at the end of period (1,204) (1,285) (1,138)
Unrealized gain (loss) on debt securities      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period 0 0 1
Before tax amount 0 0 2
Tax benefit (expense) 0 0 0
After tax amount 0 0 2
Amounts reclassified from accumulated other comprehensive income(1) 0 0 (3)
Net current period other comprehensive (loss) income 0 0 (1)
Balance at the end of period 0 0 0
Unrealized gain (loss) on derivatives      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (9) 2 (3)
Before tax amount (41) (12) 21
Tax benefit (expense) 9 5 (7)
After tax amount (32) (7) 14
Amounts reclassified from accumulated other comprehensive income(1) (2) (4) (9)
Net current period other comprehensive (loss) income (34) (11) 5
Balance at the end of period (43) (9) 2
Noncontrolling interests      
Changes in accumulated other comprehensive income (loss) by component:      
Before tax amount (10) (5) (30)
Tax benefit (expense) 0 0 0
After tax amount (10) (5) (30)
Amounts reclassified from accumulated other comprehensive income(1) 0 0 1
Net current period other comprehensive (loss) income $ (10) $ (5) $ (29)