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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Goodwill of $1.9 billion consisted of $1.4 billion recorded in GM Financial and $504 million and $490 million included in GM Cruise at December 31, 2018 and 2017.
| December 31, 2018 |  | December 31, 2017
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Technology and intellectual property | $ | 734 |  |  | $ | 457 |  |  | $ | 277 |  |  | $ | 8,092 |  |  | $ | 7,735 |  |  | $ | 357 |
Brands | 4,299 |  |  | 1,165 |  |  | 3,134 |  |  | 4,302 |  |  | 1,044 |  |  | 3,258 |
Dealer network, customer relationships and other | 968 |  |  | 661 |  |  | 307 |  |  | 1,310 |  |  | 933 |  |  | 377 |
Total intangible assets | $ | 6,001 |  |  | $ | 2,283 |  |  | $ | 3,718 |  |  | $ | 13,704 |  |  | $ | 9,712 |  |  | $ | 3,992 |
Our amortization expense related to intangible assets was $247 million, $278 million, and $325 million in the years ended December 31, 2018, 2017 and 2016. Amortization expense related to intangible assets is estimated to be approximately $184 million in each of the next five years. We removed $7.7 billion of fully amortized intangible assets in the year ended December 31, 2018 which are no longer in use and provide no remaining economic benefit.

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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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