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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | The following table presents activity related to goodwill and other intangible asset balances for the six months ended June 30, 2022.
| Goodwill |  | Intangible Assets |  |
(Dollars in millions) | Net Carrying Amount |  | Cost | Accumulated Amortization | Net Carrying Amount |  | Total Goodwill and Other Intangible Assets - Net
Balance at December, 31, 2021 | $ | 276 |  |  | $ | 180 |  | $ | (5) |  | $ | 175 |  |  | $ | 451 |
Additions | 101 |  |  | 10 |  | — |  | 10 |  |  | 111 |
Amortization | — |  |  | — |  | (5) |  | (5) |  |  | (5) |
Balance at June, 30, 2022 | $ | 377 |  |  | $ | 190 |  | $ | (10) |  | $ | 180 |  |  | $ | 557 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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