Fair Value - Carrying Value and Fair Value Classified by Level (Details) - Nonrecurring - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Carrying Value
Assets:
Mortgage loans	$ 1,311	$ 1,044
Equity securities	534	411
Liabilities:
Investment contract liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	312	332
Long-term debt	61,410	52,257
Carrying Value \| Disposal Group, Held-for-sale, Not Discontinued Operations
Liabilities:
Long-term debt		3
Estimated Fair Value
Assets:
Mortgage loans	1,274	978
Liabilities:
Investment contract liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	279	305
Long-term debt	58,451	47,653
Level 1 \| Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contract liabilities with a fixed maturity	0	0
Investment contracts liabilities without a fixed maturity	0	0
Long-term debt	58,451	47,653
Level 2 \| Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contract liabilities with a fixed maturity	0	0
Investment contracts liabilities without a fixed maturity	0	0
Long-term debt	0	0
Level 3 \| Estimated Fair Value
Assets:
Mortgage loans	1,274	978
Liabilities:
Investment contract liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	279	305
Long-term debt	$ 0	$ 0

Investment Contracts With Fixed Maturity, Fair Value Disclosure.

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Investment Contracts Without A Fixed Maturity, Fair Value Disclosure.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
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-Name Accounting Standards Codification
-Section 55
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-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

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Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
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Fair value portion of mortgage loans held-for-sale.

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