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Closed Block (Closed Block Liabilities and Assets Designated to Closed Block; Maximum Future Earnings to be Recognized) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Jan. 01, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | ---
Closed Block liabilities |  |  |  |  |
Future policy benefits | $ 43,587 |  | $ 44,414 |  |
Policyholders’ dividends payable | 648 |  | 617 |  |
Policyholders’ dividend obligation | 792 | $ 0 | 0 | $ 8,027 |
Policyholders’ account balances | 4,500 |  | 4,607 |  | $ 4,737
Other Closed Block liabilities | 3,605 |  | 3,499 |  |
Total Closed Block liabilities | 53,132 |  | 53,137 |  |
Closed Block assets |  |  |  |  |
Fixed maturities, available-for-sale, at fair value | 30,314 |  | 29,898 |  |
Fixed maturities, trading, at fair value | 887 |  | 900 |  |
Equity securities, at fair value | 1,970 |  | 1,733 |  |
Commercial mortgage and other loans | 7,769 |  | 7,926 |  |
Policy loans | 3,479 |  | 3,637 |  |
Other invested assets | 4,513 |  | 4,254 |  |
Short-term investments | 232 |  | 337 |  |
Total investments | 49,164 |  | 48,685 |  |
Cash and cash equivalents | 993 |  | 1,307 |  |
Accrued investment income | 421 |  | 402 |  |
Other Closed Block assets | 138 |  | 162 |  |
Total Closed Block assets | 50,716 |  | 50,556 |  |
Excess of reported Closed Block liabilities over Closed Block assets | 2,416 |  | 2,581 |  |
Portion of above representing accumulated other comprehensive income (loss): |  |  |  |  |
Net unrealized investment gains (losses) | (2,241) |  | (3,458) |  |
Allocated to policyholder dividend obligation | 2,081 |  | 3,207 |  |
Future earnings to be recognized from Closed Block assets and Closed Block liabilities | $ 2,256 |  | $ 2,330 |  |

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- Definition For the segregated group of participating or dividend-paying policies and contracts identified as the closed block, the change in the period in the obligation representing amounts to be distributed to policyholders owning contracts in the closed block. Also a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479805/944-805-55-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 50 -Paragraph 3 -Subparagraph (b)(10) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479835/944-805-50-3 + Details
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- Definition The liability as of the balance sheet date for future benefits to be paid to or on behalf of policyholders and expenses, less the present value of future net premiums payable under the insurance contracts and the policy cash accumulations, for the segregated group of participating or dividend-paying policies and contracts identified as a closed block. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479805/944-805-55-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 50 -Paragraph 3 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479835/944-805-50-3 + Details
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- Definition The liability as of the balance sheet date for the excess of the cumulative actual closed block earnings over the cumulative expected (actuarially determined) closed block earnings (each) for the period from the actuarial calculation date to the date of measurement. The excess will result in future dividends to closed block policyholders, unless offset by less favorable than expected future performance of the closed block. The policyholder dividend obligation, which may not have a negative balance, recognizes that a portion of earnings in certain cases will not inure to the stockholders of the insurance entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479805/944-805-55-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 805 -Section 50 -Paragraph 3 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479835/944-805-50-3 + Details
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