Annual report pursuant to Section 13 and 15(d)

OTHER COMPREHENSIVE INCOME (LOSS) (Details)

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OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period $ (1,503)    
Before tax amount (382) $ 418 $ (634)
Tax benefit 7 (51) 88
After tax amount (375) 367 (546)
Amounts reclassified from accumulated other comprehensive income [1] 42 74 56
Impact of tax legislation (Note 4)   103  
Net current period other comprehensive income (loss) (333) 338 (490)
Balance at the end of period (1,807) (1,503)  
Impact of the Tax Cuts and Jobs Act of 2017   126  
Accumulated Other Comprehensive Loss      
Changes in accumulated other comprehensive income (loss) by component:      
Net current period other comprehensive income (loss) (304) 318 (473)
Total attributable to Cummins Inc.      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (1,503) (1,821) (1,348)
Before tax amount (352) 398 (617)
Tax benefit 7 (51) 88
After tax amount (345) 347 (529)
Amounts reclassified from accumulated other comprehensive income [1] 41 74 56
Impact of tax legislation (Note 4)   103  
Net current period other comprehensive income (loss) (304) 318 (473)
Balance at the end of period (1,807) (1,503) (1,821)
Impact of the Tax Cuts and Jobs Act of 2017   126  
Change in pensions and other postretirement defined benefit plans      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (689) (685) (654)
Before tax amount (42) 73 (111)
Tax benefit 7 (36) 44
After tax amount (35) 37 (67)
Amounts reclassified from accumulated other comprehensive income [1] 53 62 36
Impact of tax legislation (Note 4) [2]   103  
Net current period other comprehensive income (loss) 18 (4) (31)
Balance at the end of period (671) (689) (685)
Foreign currency translation adjustment      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (812) (1,127) (696)
Before tax amount (333) 335 (469)
Tax benefit 7 (20) 38
After tax amount (326) 315 (431)
Impact of tax legislation (Note 4)   0  
Net current period other comprehensive income (loss) (326) 315 (431)
Balance at the end of period (1,138) (812) (1,127)
Unrealized gain (loss) on marketable securities (1)      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period [3] 1 (1) (2)
Before tax amount [3] 2 2 1
Tax benefit [3] 0    
After tax amount [3] 2 2 1
Amounts reclassified from accumulated other comprehensive income [1],[3] (3)    
Impact of tax legislation (Note 4) [3]   0  
Net current period other comprehensive income (loss) [3] (1) 2 1
Balance at the end of period [3] 0 1 (1)
Unrealized gain (loss) on derivatives      
Changes in accumulated other comprehensive income (loss) by component:      
Balance at the beginning of period (3) (8) 4
Before tax amount 21 (12) (38)
Tax benefit (7) 5 6
After tax amount 14 (7) (32)
Amounts reclassified from accumulated other comprehensive income [1] (9) 12 20
Impact of tax legislation (Note 4)   0  
Net current period other comprehensive income (loss) 5 5 (12)
Balance at the end of period 2 (3) (8)
Noncontrolling interests      
Changes in accumulated other comprehensive income (loss) by component:      
Before tax amount (30) 20 (17)
After tax amount (30) 20 (17)
Amounts reclassified from accumulated other comprehensive income [1] 1    
Impact of tax legislation (Note 4)   0  
Net current period other comprehensive income (loss) $ (29) 20 $ (17)
Tax Year 2016 | Accumulated Other Comprehensive Loss      
Changes in accumulated other comprehensive income (loss) by component:      
Impact of the Tax Cuts and Jobs Act of 2017   (126)  
Tax Year 2017 | Accumulated Other Comprehensive Loss      
Changes in accumulated other comprehensive income (loss) by component:      
Impact of the Tax Cuts and Jobs Act of 2017   $ 23  
[1] Amounts are net of tax. Reclassifications out of accumulated other comprehensive income (loss) and the related tax effects are immaterial for separate disclosure.
[2] Impact of tax legislation includes $(126) million related to Tax Legislation and $23 million related to 2017 activity. See Note 4, "INCOME TAXES," to our Consolidated Financial Statements for additional information.
[3] Effective January 1, 2018 and forward, unrealized gains and losses, net of tax for equity securities are reported in "Other income, net" on the Consolidated Statements of Income instead of comprehensive income.
Unrealized gains and losses for debt securities will continue to be reported in comprehensive income. See NOTE 1 , "SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ," "RECENTLY ADOPTED AND RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS" section for additional information.