Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Profit of consolidated companies	$ 114	$ 105	$ 258	$ 229
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	(61)	(167)	(165)	(61)
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	2	(1)	2	(1)
(Gains) losses reclassified to earnings, net of tax (expense)/benefit	1	0	2	1
Total Other comprehensive income (loss), net of tax	(58)	(168)	(161)	(61)
Comprehensive income (loss)	56	(63)	97	168
Less: Comprehensive income attributable to the noncontrolling interests	5	2	8	5
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 51	$ (65)	$ 89	$ 163