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Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible assets, less accumulated amortization | $ 307 | $ 326 |
Finite-Lived Intangible Assets, Net | 292 | 312 |
2018 | 30 |  |
2019 | 28 |  |
2020 | 26 |  |
2021 | 24 |  |
2022 | 22 |  |
Thereafter | 162 |  |
Amortization of intangible assets | 29 | 47 | $ 55
Goodwill | 70 | 61 | 46
Goodwill, Acquired During Period | 9 | 15 |
Goodwill, Impaired, Accumulated Impairment Loss | 0 | 0 |
License |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets, Gross (Excluding Goodwill) | 14 | 14 |
Other Intangible Assets |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets, Gross (Excluding Goodwill) | 57 | 52 |
Finite-Lived Intangible Assets, Accumulated Amortization | 10 | 6 |
Intangible assets, less accumulated amortization | 47 | 47 |
2018 | 5 |  |
2019 | 4 |  |
2020 | 4 |  |
2021 | 4 |  |
2022 | 4 |  |
Thereafter | $ 26 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 5 years 3 months 18 days |  |
Amortization of intangible assets | $ 4 | 3 | 3
Insurance Intangible Asset [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Intangible Assets, Gross (Excluding Goodwill) | 1,258 | 1,247 |
Finite-Lived Intangible Assets, Accumulated Amortization | 1,013 | 981 |
Intangible assets, less accumulated amortization | 245 | 266 |
2018 | 26 |  |
2019 | 24 |  |
2020 | 22 |  |
2021 | 20 |  |
2022 | 18 |  |
Thereafter | $ 136 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 7 years 1 month 6 days |  |
Amortization of intangible assets | $ 25 | $ 44 | $ 52

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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