Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in the carrying value of goodwill are detailed below by segment:



	Oilfield Services			Oilfield Equipment			Turbo-machinery & Process Solutions			Digital Solutions			Total
Balance at December 31, 2016, gross	$	2,779		$	3,852		$	1,814		$	1,989		$	10,434
Accumulated impairment at December 31, 2016	(2,633		)	(867		)	—			(254		)	(3,754		)
Balance at December 31, 2016	146			2,985			1,814			1,735			6,680
Acquisitions and purchase accounting adjustments ⁽¹⁾	13,052			—			—			—			13,052
Currency exchange and others	7			49			92			47			195
Balance at December 31, 2017	13,205			3,034			1,906			1,782			19,927
Acquisitions and purchase accounting adjustments ⁽¹⁾	(136		)	293			394			429			980
Currency exchange and others	(26		)	(17		)	(114		)	(33		)	(190		)
Balance at December 31, 2018	$	13,043		$	3,310		$	2,186		$	2,178		$	20,717

⁽¹⁾

Includes goodwill associated with the acquisition of Baker Hughes. The final determination of fair value of the assets and liabilities and the related goodwill associated with the acquisition of Baker Hughes was concluded in the second quarter of 2018. Of the total goodwill of $13,963 million resulting from the acquisition of Baker Hughes, $12,898 million is allocated to our Oilfield Services segment and the remainder to our other segments based on the expected benefit from the synergies of the acquisition.

Schedule of finite-lived intangible assets

Intangible assets are comprised of the following at December 31:



	2018							2017
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Technology	$	1,107	$	(526	)	$	581	$	1,177	$	(440	)	$	737
Customer relationships	3,085		(944		)	2,141		3,202		(819		)	2,383
Capitalized software	1,118		(824		)	294		1,130		(697		)	433
Trade names and trademarks	698		(229		)	469		757		(159		)	598
Other	14		(2		)	12		10		—			10
Finite-lived intangible assets	6,022		(2,525		)	3,497		6,276		(2,115		)	4,161
Indefinite-lived intangible assets ⁽¹⁾	2,222		—			2,222		2,197		—			2,197
Total intangible assets	$	8,244	$	(2,525	)	$	5,719	$	8,473	$	(2,115	)	$	6,358


⁽¹⁾	Indefinite-lived intangible assets principally comprise trade names and trademarks acquired in business combinations.

Schedule of indefinite-lived intangible assets

Intangible assets are comprised of the following at December 31:



	2018							2017
	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Technology	$	1,107	$	(526	)	$	581	$	1,177	$	(440	)	$	737
Customer relationships	3,085		(944		)	2,141		3,202		(819		)	2,383
Capitalized software	1,118		(824		)	294		1,130		(697		)	433
Trade names and trademarks	698		(229		)	469		757		(159		)	598
Other	14		(2		)	12		10		—			10
Finite-lived intangible assets	6,022		(2,525		)	3,497		6,276		(2,115		)	4,161
Indefinite-lived intangible assets ⁽¹⁾	2,222		—			2,222		2,197		—			2,197
Total intangible assets	$	8,244	$	(2,525	)	$	5,719	$	8,473	$	(2,115	)	$	6,358


⁽¹⁾	Indefinite-lived intangible assets principally comprise trade names and trademarks acquired in business combinations.

Schedule of finite-lived intangible assets, future amortization expense

Estimated amortization expense for each of the subsequent five fiscal years is expected to be as follows:



Year	Estimated Amortization Expense
2019	$	348
2020	316
2021	267
2022	225
2023	213