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, 2013	$ 3,991	$ 745	$ 2	$ 3,004	$ 117	$ 123
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Profit of consolidated companies	134			131		3
Dividend paid to Caterpillar	0
Foreign currency translation, net of tax	4				5	(1)
Derivative financial instruments, net of tax	(1)				(1)
Balance at Mar. 31, 2014	4,128	745	2	3,135	121	125
Balance at Dec. 31, 2014	3,654	745	2	3,139	(364)	132
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Profit of consolidated companies	135			133		2
Dividend paid to Caterpillar	(100)			(100)
Foreign currency translation, net of tax	(402)				(401)	(1)
Derivative financial instruments, net of tax	2				2
Balance at Mar. 31, 2015	$ 3,289	$ 745	$ 2	$ 3,172	$ (763)	$ 133