Fair Value - Carrying Value and Fair Value Classified by Level (Details) - Nonrecurring - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Carrying Value
Assets:
Mortgage loans	$ 1,273	$ 1,044
Equity securities	519	411
Liabilities:
Investment contracts liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	324	332
Long-term debt	61,914	52,257
Carrying Value \| Disposal Group, Held-for-sale, Not Discontinued Operations
Liabilities:
Long-term debt		3
Estimated Fair Value
Assets:
Mortgage loans	1,203	978
Liabilities:
Investment contracts liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	277	305
Long-term debt	54,807	47,653
Level 1 \| Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contracts liabilities with a fixed maturity	0	0
Investment contracts liabilities without a fixed maturity	0	0
Long-term debt	54,807	47,653
Level 2 \| Estimated Fair Value
Assets:
Mortgage loans	0	0
Liabilities:
Investment contracts 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	1,203	978
Liabilities:
Investment contracts liabilities with a fixed maturity	1	3
Investment contracts liabilities without a fixed maturity	277	305
Long-term debt	$ 0	$ 0

Investment Contracts With Fixed Maturity, Fair Value Disclosure.

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- Definition

Investment Contracts Without A Fixed Maturity, Fair Value Disclosure.

+ References

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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
-SubTopic 20
-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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

Fair value portion of mortgage loans held-for-sale.

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