Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 104	$ 150	$ 239	$ 284
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	136	32	(266)	36
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	0	(2)	1	(4)
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	1	1	2	2
Total Other comprehensive income (loss), net of tax	137	31	(263)	34
Comprehensive income (loss)	241	181	(24)	318
Less: Comprehensive income attributable to the noncontrolling interests	2	2	3	4
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 239	$ 179	$ (27)	$ 314