Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 95	$ 117
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	71	80
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(26)	(12)
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	20	14
Total Other comprehensive income (loss), net of tax	65	82
Comprehensive income (loss)	160	199
Less: Comprehensive income (loss) attributable to the noncontrolling interests	10	2
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 150	$ 197