Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 135	$ 131	$ 323	$ 302
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	(165)	(50)	(132)	(241)
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	68	42	46	115
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	(73)	(42)	(87)	(118)
Total Other comprehensive income (loss), net of tax	(170)	(50)	(173)	(244)
Comprehensive income (loss)	(35)	81	150	58
Less: Comprehensive income (loss) attributable to the noncontrolling interests	1	0	12	7
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ (36)	$ 81	$ 138	$ 51