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Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets by class

Intangible assets consisted of the following:



(In millions)	Gross Carrying Amount				Accumulated Amortization				Net Book Value
September 30, 2018	Gross Carrying Amount				Accumulated Amortization				Net Book Value
Customer related intangible assets	$	2,292			$	1,260			$	1,032
Acquired software and technology	578				483				95
Trade names	117				69				48
Capitalized software development costs	783				301				482
Purchased software	262				117				145
Total	$	4,032			$	2,230			$	1,802



(In millions)	Gross Carrying Amount				Accumulated Amortization				Net Book Value
December 31, 2017	Gross Carrying Amount				Accumulated Amortization				Net Book Value
Customer related intangible assets	$	2,293			$	1,168			$	1,125
Acquired software and technology	579				460				119
Trade names	117				64				53
Capitalized software development costs	737				282				455
Purchased software	241				111				130
Total	$	3,967			$	2,085			$	1,882