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Reinsurance (Effects of Reinsurance on Balance Sheet) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021
--- | --- | --- | --- | ---
Assets |  |  |  |
Premiums, reinsurance and other receivables relating to variable interest entities | $ 28,971 | $ 17,364 |  | $ 18,169
Market risk benefits, at estimated fair value | 286 | 280 |  |
Deferred policy acquisition costs and value of business acquired | 20,151 | 19,653 | $ 19,806 | 20,417
Total assets | 49,408 | 37,297 |  |
Liabilities |  |  |  |
Net liability for future policy benefits | 196,406 | 187,222 |  | 224,358
Policyholder account balances | 219,269 | 210,597 |  |
Market risk benefits, at estimated fair value | 3,179 | 3,763 |  | 7,901
Other policy-related balances | 19,736 | 18,424 |  | $ 18,032
Other liabilities | 35,805 | 25,933 |  |
Total liabilities | 255,126 | 235,342 |  |
Direct Reinsurance [Member] |  |  |  |
Assets |  |  |  |
Premiums, reinsurance and other receivables relating to variable interest entities | 6,044 | 5,427 |  |
Market risk benefits, at estimated fair value | 279 | 273 |  |
Deferred policy acquisition costs and value of business acquired | 20,297 | 19,522 |  |
Total assets | 26,620 | 25,222 |  |
Liabilities |  |  |  |
Net liability for future policy benefits | 192,424 | 183,377 |  |
Market risk benefits, at estimated fair value | 3,141 | 3,591 |  |
Other policy-related balances | 18,852 | 17,250 |  |
Other liabilities | 27,125 | 18,654 |  |
Total liabilities | 241,542 | 222,872 |  |
Assumed Reinsurance [Member] |  |  |  |
Assets |  |  |  |
Premiums, reinsurance and other receivables relating to variable interest entities | 1,405 | 1,505 |  |
Market risk benefits, at estimated fair value | 7 | 7 |  |
Deferred policy acquisition costs and value of business acquired | 353 | 352 |  |
Total assets | 1,765 | 1,864 |  |
Liabilities |  |  |  |
Net liability for future policy benefits | 3,982 | 3,845 |  |
Market risk benefits, at estimated fair value | 38 | 172 |  |
Other policy-related balances | 1,152 | 1,183 |  |
Other liabilities | 1,892 | 2,006 |  |
Total liabilities | 7,064 | 7,206 |  |
Ceded Reinsurance [Member] |  |  |  |
Assets |  |  |  |
Premiums, reinsurance and other receivables relating to variable interest entities | 21,522 | 10,432 |  |
Market risk benefits, at estimated fair value | 0 | 0 |  |
Deferred policy acquisition costs and value of business acquired | (499) | (221) |  |
Total assets | 21,023 | 10,211 |  |
Liabilities |  |  |  |
Net liability for future policy benefits | 0 | 0 |  |
Market risk benefits, at estimated fair value | 0 | 0 |  |
Other policy-related balances | (268) | (9) |  |
Other liabilities | 6,788 | 5,273 |  |
Total liabilities | 6,520 | $ 5,264 |  |
Universal Life, Variable Universal Life, and Universal Life with Secondary Guarantees |  |  |  |
Liabilities |  |  |  |
Other liabilities | $ 770 |  |  |

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