Goodwill and Other Intangibles, net (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Amortized Intangible Assets

The balances and changes in Other Intangibles, net are as follows (in millions):

	December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets
Current technology	$	24	$	(23	)	$	1
Trade names	41		(41		)	—
Unpatented technology	242		(205		)	37
Patents and patent rights	235		(215		)	20
Customer relationships	481		(240		)	241
Total	$	1,023	$	(724	)	$	299
Amortization expense for the year ended December 31, 2017			$	184

	December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets
Current technology	$	24	$	(21	)	$	3
Trade names	40		(40		)	—
Unpatented technology	241		(146		)	95
Patent and patent rights	238		(161		)	77
Customer relationships	478		(173		)	305
Total	$	1,021	$	(541	)	$	480
Amortization expense for the year ended December 31, 2016			$	229

Schedule of Future Amortization Expense

Estimated amortization expense for future periods is as follows (in millions):	Amount
For the year ended December 31, 2018	$	96
For the year ended December 31, 2019	83
For the year ended December 31, 2020	39
For the year ended December 31, 2021	37
For the year ended December 31, 2022	31
Thereafter	13
Total	$	299

Changes in Net Carrying Value of Goodwill

Changes in the net carrying value amount of goodwill were as follows (in millions):

	Total
Goodwill as of December 31, 2015	$	2,490
Impairment charge – wireless LAN divestiture	(32		)
Goodwill as of December 31, 2016	2,458
Foreign exchange impact	7
Goodwill as of December 31, 2017	$	2,465