Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 52	$ 135	$ 210	$ 323
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	150	(165)	(32)	(132)
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(49)	68	(17)	46
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	57	(73)	38	(87)
Total Other comprehensive income (loss), net of tax	158	(170)	(11)	(173)
Comprehensive income (loss)	210	(35)	199	150
Less: Comprehensive income (loss) attributable to the noncontrolling interests	9	1	16	12
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 201	$ (36)	$ 183	$ 138