CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
CONSOLIDATED NET INCOME	$ 2,268	$ 2,187	$ 994
Other comprehensive income (loss), net of tax (Note 17)
Change in pension and other postretirement defined benefit plans	(63)	18	(4)
Foreign currency translation adjustments	(152)	(356)	335
Unrealized gain on debt securities	0	0	2
Unrealized (loss) gain on derivatives	(11)	5	5
Total other comprehensive (loss) income, net of tax	(226)	(333)	338
COMPREHENSIVE INCOME	2,042	1,854	1,332
Less: Comprehensive income attributable to noncontrolling interests	3	17	15
COMPREHENSIVE INCOME ATTRIBUTABLE TO CUMMINS INC.	$ 2,039	$ 1,837	$ 1,317