Other Intangible Assets (Notes)

3 Months Ended

Mar. 31, 2017

Acquired Intangible Assets Disclosure [Abstract]

Acquired Intangible Assets

(4) Other Intangible Assets

Other intangible assets as of March 31, 2017 and December 31, 2016 were as follows (dollars in millions):

	Gross Carrying Amount		Accumulated Amortization			Net
March 31, 2017
Finite-Lived Intangible Assets:
Customer Contracts and Relationships	$	1,972	$	(1,159	)	$	813
Trademarks	55		(55		)	—
Patents and Developed Technology	227		(194		)	33
	2,254		(1,408		)	846
Indefinite-Lived Intangible Assets:
Trade Name	15		—			15
	$	2,269	$	(1,408	)	$	861
December 31, 2016
Finite-Lived Intangible Assets:
Customer Contracts and Relationships	$	1,973	$	(1,113	)	$	860
Trademarks	55		(55		)	—
Patents and Developed Technology	229		(189		)	40
	2,257		(1,357		)	900
Indefinite-Lived Intangible Assets:
Trade Name	15		—			15
	$	2,272	$	(1,357	)	$	915

Finite-lived intangible asset amortization expense was $52 million for the three months ended March 31, 2017 and $53 million for three months ended March 31, 2016.

At March 31, 2017, the weighted average remaining useful lives of our finite-lived intangible assets was 4.6 in total; 4.7 for customer contracts and relationships, and 2.3 for patents and developed technology.

As of March 31, 2017, estimated amortization expense for our finite-lived intangible assets over the next five years is as follows (dollars in millions):

2017 (remaining nine months)	$	147
2018	190
2019	179
2020	166
2021	143
2022	21
Thereafter	—
	$	846