Consolidated Statements of Changes in Stockholder's Equity (USD $) In Millions	Total	Common stock [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Accumulated other comprehensive income/(loss) [Member]	Noncontrolling interests [Member]
Balance at Dec. 31, 2010	$ 3,781	$ 745	$ 2	$ 2,734	$ 217	$ 83
Profit of consolidated companies	198			190		8
Dividend paid to Cat Inc.	(300)			(300)
Foreign currency translation, net of tax	251				249	2
Derivative financial instruments, net of tax	8				8
Balance at Jun. 30, 2011	3,938	745	2	2,624	474	93
Balance at Dec. 31, 2011	3,470	745	2	2,512	116	95
Profit of consolidated companies	229			224		5
Dividend paid to Cat Inc.	(250)			(250)
Foreign currency translation, net of tax	(61)				(61)
Derivative financial instruments, net of tax	0				0
Balance at Jun. 30, 2012	$ 3,388	$ 745	$ 2	$ 2,486	$ 55	$ 100