Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 104	$ 95
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	15	71
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(3)	(26)
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	(11)	20
Total Other comprehensive income (loss), net of tax	1	65
Comprehensive income (loss)	105	160
Less: Comprehensive income (loss) attributable to the noncontrolling interests	8	10
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 97	$ 150