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Goodwill and Acquisition-Related Intangibles | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and acquisition-related intangibles | Goodwill and acquisition-related intangibles Goodwill by segment as of December 31, 2020 and 2019, 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 6. In 2020, 2019 and 2018, we determined no impairment was indicated. The components of acquisition-related intangibles are as follows:
|  |  | December 31, 2020 |  | December 31, 2019
| Amortization Period (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Developed technology | 8 – 10 |  | $ | 1,895 |  |  | $ | 1,753 |  |  | $ | 142 |  |  | $ | 2,000 |  |  | $ | 1,660 |  |  | $ | 340 |
Other intangibles | 5 | 10 |  |  | — |  |  | 10 |  |  | — |  |  | — |  |  | — |
Total |  |  | $ | 1,905 |  |  | $ | 1,753 |  |  | $ | 152 |  |  | $ | 2,000 |  |  | $ | 1,660 |  |  | $ | 340 |
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 $198 million, $288 million and $318 million in 2020, 2019 and 2018, respectively. Fully amortized assets are written off against accumulated amortization. The remaining estimated amortization is $144 million in 2021.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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