Goodwill and other intangible assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and other intangible assets

Changes in Goodwill

($ in millions)	Discrete Automation and Motion			Low Voltage Products			Process Automation			Power Products			Power Systems			Corporate and Other			Total
Cost at January 1, 2014		3,914			3,059			1,229			736			1,709			41			10,688
Accumulated impairment charges		—			—			—			—			—			(18	)		(18	)
Balance at January 1, 2014		3,914			3,059			1,229			736			1,709			23			10,670
Goodwill acquired during the year(1)		(52	)		1			24			9			—			27			9
Goodwill allocated to disposals		—			(181	)		(19	)		—			(7	)		(27	)		(234	)
Exchange rate differences and other		(92	)		(172	)		(60	)		(25	)		(42	)		(1	)		(392	)
Balance at December 31, 2014		3,770			2,707			1,174			720			1,660			22			10,053
Goodwill acquired during the year		24			—			6			4			—			—			34
Goodwill allocated to disposals		—			—			(1	)		—			(23	)		—			(24	)
Exchange rate differences and other		(92	)		(200	)		(32	)		(15	)		(52	)		(1	)		(392	)
Balance at December 31, 2015		3,702			2,507			1,147			709			1,585			21			9,671

(1) Amounts include adjustments arising during the twelve-month measurement period subsequent to the respective acquisition date.

Intangible assets other than goodwill

	December 31,
	2015							2014
($ in millions)	Gross carrying amount		Accumulated amortization			Net carrying amount		Gross carrying amount		Accumulated amortization			Net carrying amount
Capitalized software for internal use		692		(567	)		125		719		(599	)		120
Capitalized software for sale		401		(357	)		44		405		(354	)		51
Intangibles other than software:
Customer-related		2,517		(767	)		1,750		2,618		(623	)		1,995
Technology-related		790		(585	)		205		782		(479	)		303
Marketing-related		308		(140	)		168		314		(120	)		194
Other		67		(22	)		45		72		(33	)		39
Total		4,775		(2,438	)		2,337		4,910		(2,208	)		2,702

Schedule of additions to intangible assets other than goodwill

($ in millions)	2015		2014
Capitalized software for internal use		63		52
Capitalized software for sale		15		28
Intangibles other than software:
Technology-related		33		—
Other		—		16
Total		111		96

Amortization expense of intangible assets other than goodwill

($ in millions)	2015		2014		2013
Capitalized software for internal use		60		72		81
Capitalized software for sale		21		20		34
Intangibles other than software		315		362		361
Total		396		454		476

Future amortization expense of intangible assets other than goodwill

        At December 31, 2015, future amortization expense of intangible assets other than goodwill is estimated to be:

	($ in millions)
2016		364
2017		271
2018		236
2019		175
2020		175
Thereafter		1,116
Total		2,337