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Goodwill | 12 Months Ended
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Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill |
| 8. | GOODWILL
Goodwill allocated to reportable segments as at December 31, 2020 and 2019 and changes in the carrying amount of goodwill during the years ended December 31, 2020 and 2019 are as follows:
|  | Automotive and Discrete Group (ADG) |  |  | Microcontrollers and Digital ICs Group (MDG) |  |  | Analog, MEMS & Sensors Group (AMS) |  |  | Total |
December 31, 2018 |  |  | — |  |  |  | 119 |  |  |  | 2 |  |  |  | 121 |
Business combination |  |  | 43 |  |  |  | — |  |  |  | — |  |  |  | 43 |
Foreign currency translation |  |  | — |  |  |  | (2 | ) |  |  | — |  |  |  | (2 | )
December 31, 2019 |  |  | 43 |  |  |  | 117 |  |  |  | 2 |  |  |  | 162 |
Business combination |  |  | 38 |  |  |  | 111 |  |  |  | — |  |  |  | 149 |
Foreign currency translation |  |  | 10 |  |  |  | 9 |  |  |  | — |  |  |  | 19 |
December 31, 2020 |  |  | 91 |  |  |  | 237 |  |  |  | 2 |  |  |  | 330 |
As described in Note 7, the 2020 acquisitions resulted in the recognition of $135 million in goodwill which has been included in the ADG and MDG segments to align the goodwill of the acquired businesses with the segments for which the related activities are reported. In addition, changes in the carrying amount of goodwill in 2020 include $14 million increase related to the acquisition of Norstel following finalization of the purchase price allocation in 2020. Goodwill as at December 31, 2020 and 2019 is net of accumulated impairment losses of $102 million, of which $96 million relates to the MDG segment and $6 million to Others. In 2020, 2019 and 2018, no impairment loss was recorded by the Company.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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