Intangible assets and goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Intangible assets and goodwill

Intangible assets

		December 31, 2011
(Millions of dollars)	Weighted Amortizable Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net
Customer relationships	15	$	2,811	$	(213	)	$	2,598
Intellectual property	11	1,794		(244		)	1,550
Other	11	299		(97		)	202
Total finite-lived intangible assets	13	4,904		(554		)	4,350
Indefinite-lived intangible assets - In-process research & development		18		—			18
Total intangible assets		$	4,922	$	(554	)	$	4,368

		December 31, 2010
(Millions of dollars)	Weighted Amortizable Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net
Customer relationships	17	$	630	$	(108	)	$	522
Intellectual property	9	306		(166		)	140
Other	13	197		(72		)	125
Total finite-lived intangible assets	14	1,133		(346		)	787
Indefinite-lived intangible assets - In-process research & development		18		—			18
Total intangible assets		$	1,151	$	(346	)	$	805

		December 31, 2009
(Millions of dollars)	Weighted Amortizable Life (Years)	Gross Carrying Amount		Accumulated Amortization			Net
Customer relationships	18	$	396	$	(75	)	$	321
Intellectual property	10	211		(143		)	68
Other	11	130		(54		)	76
Total intangible assets	15	$	737	$	(272	)	$	465

Expected amortization expense related to intangible assets

(Millions of dollars)

2012		2013		2014		2015		2016		Thereafter
$	389	$	382	$	379	$	373	$	364	$	2,481

Goodwill

(Millions of dollars)	Construction Industries		Resource Industries			Power Systems			Other1			Consolidated Total
Balance at January 1, 2009	$	319	$	66		$	1,747		$	129		$	2,261
Impairments	—		(22		)	—			—			(22		)
Other adjustments2	23		3			4			—			30
Balance at December 31, 2009	342		47			1,751			129			2,269
Business combinations	5		3			326			—			334
Other adjustments2	10		1			—			—			11
Balance at December 31, 2010	357		51			2,077			129			2,614
Business combinations	—		4,616			410			—			5,026
Business divestitures3	—		(101		)	—			(12		)	(113		)
Held for sale3	—		(296		)	—			—			(296		)
Other adjustments2	21		(171		)	(1		)	—			(151		)
Balance at December 31, 2011	$	378	$	4,099		$	2,486		$	117		$	7,080

1      Includes all other operating segments (See Note 22).

2      Other adjustments are comprised primarily of foreign currency translation.

3      See Note 25 for additional information.