Goodwill and Acquisition-Related Intangibles

12 Months Ended

Dec. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and acquisition-related intangibles

8. Goodwill and acquisition-related intangibles

Goodwill by segment as of December 31, 2018 and 2017, is as follows:

	Goodwill
Analog	$	4,158
Embedded Processing		172
Other		32
Total	$	4,362

We perform our annual goodwill impairment test as of October 1 and determine whether the fair value of each of our reporting units is in excess of its carrying value. Determination of fair value is based upon management estimates and judgment, using unobservable inputs in discounted cash flow models to calculate the fair value of each reporting unit. These unobservable inputs are considered Level 3 measurements, as described in Note 7. In2018, 2017and 2016, we determined no impairment was indicated.

The components of acquisition-related intangibles are as follows:

	Amortization	December 31, 2018						December 31, 2017
	Period	Gross Carrying		Accumulated				Gross Carrying		Accumulated
	(Years)	Amount		Amortization		Net		Amount		Amortization		Net
Developed technology	7 - 10	$	2,125	$	1,573	$	552	$	2,130	$	1,361	$	769
Customer relationships	8		810		734		76		810		633		177
Total		$	2,935	$	2,307	$	628	$	2,940	$	1,994	$	946

Acquisition charges

Acquisition charges represent the ongoing amortization of intangible assets resulting from the acquisition of National Semiconductor Corporation. These amounts are included in Other for segment reporting purposes, consistent with how management measures the performance of its segments.

Amortization of acquisition-related intangibles was $318 million, $318 million and $319 million in 2018, 2017and 2016, respectively. Fully amortized assets are written off against accumulated amortization. Remaining estimated amortization is as follows:

	Amortization of Acquisition-Related Intangibles
2019	$	288
2020		198
2021		142