Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 84	$ 76	$ 188	$ 171
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	18	(262)	33	(191)
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(19)	99	(22)	73
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	(3)	(96)	(14)	(76)
Total Other comprehensive income (loss), net of tax	(4)	(259)	(3)	(194)
Comprehensive income (loss)	80	(183)	185	(23)
Less: Comprehensive income (loss) attributable to the noncontrolling interests	3	(3)	11	7
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 77	$ (180)	$ 174	$ (30)