Consolidated Statement of Changes in Stockholders' Equity (USD $) In Millions		Total	Common stock	Treasury stock	Profit employed in the business	Accumulated other comprehensive income (loss)	Noncontrolling interests	Comprehensive income (loss)
Balance at Dec. 31, 2009 (Before adjustment)		$ 8,823			$ 19,711	$ (3,764)
Balance (Restatement Adjustment) (Adjustment to adopt consolidation of variable interest entities)	[1]	(3)			(6)	3
Balance at Dec. 31, 2009		8,820	3,439	(10,646)	19,705	(3,761)	83
Increase (Decrease) in Stockholders' Equity
Profit (loss) of consolidated and affiliated companies		1,770			1,732		38	1,770
Foreign currency translation, net of tax of $15 and $51 for the nine months ended September 30, 2011 and 2010, respectively		(26)				(40)	14	(26)
Pension and other postretirement benefits
Current year actuarial gain (loss), net of tax of $500	[2]	(857)				(857)		(857)
Amortization of actuarial (gain) loss, net of tax of $158 and $121 for the nine months ended September 30, 2011 and 2010, respectively		221				218	3	221
Current year prior service (cost) credit, net of tax of $1	[2]	(1)				(1)		(1)
Amortization of prior service (credit) cost, net of tax of $9 and $9 for the nine months ended September 30, 2011 and 2010, respectively		(11)				(11)		(11)
Amortization of transition (asset) obligation, net of tax of $1 and $0 for the nine months ended September 30, 2011 and 2010, respectively		1				1		1
Derivative financial instruments
Gains (losses) deferred, net of tax of $15 and $15 for the nine months ended September 30, 2011 and 2010, respectively		(29)				(29)		(29)
(Gains) losses reclassified to earnings, net of tax of $14 and $16 for the nine months ended September 30, 2011 and 2010, respectively		32				32		32
Available-for-sale securities
Gains (losses) deferred, net of tax of $8 and $23 for the nine months ended September 30, 2011 and 2010, respectively		35				35		35
(Gains) losses reclassified to earnings, net of tax of $0		1				1		1
Change in ownership from noncontrolling interests		(134)	(68)				(66)
Dividends declared		(542)			(542)
Common shares issued from treasury stock for stock-based compensation: 7,797,655 and 8,502,582 for the nine months ended September 30, 2011 and 2010, respectively		193	37	156
Common shares issued from treasury stock for benefit plans: 1,447,500	[3]	93	66	27
Stock-based compensation expense		196	196
Net excess tax benefits from stock-based compensation		87	87
Cat Japan share redemption	[4]	26			60		(34)
Comprehensive income (loss)								1,136
Balance at Sep. 30, 2010		9,875	3,757	(10,463)	20,955	(4,412)	38
Balance at Dec. 31, 2010		10,864	3,888	(10,397)	21,384	(4,051)	40
Increase (Decrease) in Stockholders' Equity
Profit (loss) of consolidated and affiliated companies		3,419			3,381		38	3,419
Foreign currency translation, net of tax of $15 and $51 for the nine months ended September 30, 2011 and 2010, respectively		(212)				(244)	32	(212)
Pension and other postretirement benefits
Amortization of actuarial (gain) loss, net of tax of $158 and $121 for the nine months ended September 30, 2011 and 2010, respectively		299				300	(1)	299
Amortization of prior service (credit) cost, net of tax of $9 and $9 for the nine months ended September 30, 2011 and 2010, respectively		(15)				(15)		(15)
Amortization of transition (asset) obligation, net of tax of $1 and $0 for the nine months ended September 30, 2011 and 2010, respectively		1				1		1
Derivative financial instruments
Gains (losses) deferred, net of tax of $15 and $15 for the nine months ended September 30, 2011 and 2010, respectively		24				24		24
(Gains) losses reclassified to earnings, net of tax of $14 and $16 for the nine months ended September 30, 2011 and 2010, respectively		(21)				(21)		(21)
Available-for-sale securities
Gains (losses) deferred, net of tax of $8 and $23 for the nine months ended September 30, 2011 and 2010, respectively		(11)				(11)		(11)
(Gains) losses reclassified to earnings, net of tax of $0		(2)				(2)		(2)
Change in ownership from noncontrolling interests		4					4
Dividends declared		(581)			(581)
Distribution to noncontrolling interests		(3)					(3)
Common shares issued from treasury stock for stock-based compensation: 7,797,655 and 8,502,582 for the nine months ended September 30, 2011 and 2010, respectively		110	12	98
Stock-based compensation expense		163	163
Net excess tax benefits from stock-based compensation		166	166
Cat Japan share redemption	[4]	8			67		(59)
Comprehensive income (loss)								3,482
Balance at Sep. 30, 2011		$ 14,213	$ 4,229	$ (10,299)	$ 24,251	$ (4,019)	$ 51

[1] See Note 15 for additional information.

[2] Changes in amounts due to plan re-measurements. See Note 9 for additional information.

[3] See Note 9 regarding shares issued for benefit plans.

[4] See Note 16 regarding the Cat Japan share redemption.