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GOODWILL AND OTHER INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLE ASSETS | GOODWILL AND OTHER INTANGIBLE ASSETS Changes in goodwill for the years ended December 31, 2021 and 2020 are as follows:
(in millions) | Amount
Balance at December 31, 2019 | $ | 289 |
Additions | 5 |
Balance at December 31, 2020 | $ | 294 |
Additions | — |
Balance at December 31, 2021 | $ | 294 |
Other intangibles consists of customer contact lists with a weighted average amortization period of 10 years:
(in millions) | December 31, 2021 | December 31, 2020
Gross carrying amount | $ | 98 |  | $ | 98 |
Accumulated amortization | (92) |  | (80) |
Net carrying amount | $ | 6 |  | $ | 18 |
Amortization of intangible assets during the years ended December 31, 2021, 2020 and 2019 was $5 million for each period. We evaluate the remaining useful life of intangible assets quarterly to determine whether events and circumstances warrant a revision to the estimated remaining useful life. During the year ended December 31, 2021, we recognized a $7 million impairment of a customer relationship intangible due to higher than expected attrition. Expense related to intangibles amortization in future periods as of December 31, 2021 is expected to be as follows:
Year ending December 31: | Amount (in millions)
2022 | $ | 4 |
2023 | 2 |
2024 and thereafter | — |
Total | $ | 6 |

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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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