Consolidated Statements of Changes in Stockholder's Equity (USD $) In Millions, unless otherwise specified	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income/(loss)	Noncontrolling interests
Balance at Dec. 31, 2011	$ 3,471	$ 745	$ 2	$ 2,513	$ 116	$ 95
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Profit of consolidated companies	439			428		11
Dividend paid to Caterpillar	(250)			(250)
Foreign currency transalation, net of tax	62				62	0
Derivative financial instruments, net of tax	(2)				(2)
Balance at Dec. 31, 2012	3,720	745	2	2,691	176	106
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Profit of consolidated companies	527			513		14
Dividend paid to Caterpillar	(200)			(200)
Foreign currency transalation, net of tax	(59)				(62)	3
Derivative financial instruments, net of tax	3				3
Balance at Dec. 31, 2013	3,991	745	2	3,004	117	123
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Profit of consolidated companies	544			535		9
Dividend paid to Caterpillar	(400)			(400)
Foreign currency transalation, net of tax	(481)				(481)	0
Derivative financial instruments, net of tax	0				0
Balance at Dec. 31, 2014	$ 3,654	$ 745	$ 2	$ 3,139	$ (364)	$ 132