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Condensed Financial Information (Parent Company) (Condensed Balance Sheet) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Investments: |  |  |  |  |
Estimated Fair Value of Fixed Maturity Securities AFS | $ 281,412 | $ 276,780 |  |  |
Short-term investments, principally at estimated fair value | 6,045 | 4,935 |  |  |
Other invested assets, at estimated fair value | 18,202 | 20,038 |  |  |
Total investments | 446,137 | 433,293 |  |  |
Cash and cash equivalents | 20,639 | 20,195 |  |  |
Accrued investment income | $ 3,589 | $ 3,446 |  |  |
Investment, Issuer Affiliation [Extensible Enumeration] | Investment, Affiliated Issuer, Controlled [Member] | Investment, Affiliated Issuer, Controlled [Member] |  |  |
Other assets | $ 11,139 | $ 11,025 |  | $ 11,742 |
Total assets | 687,584 | 663,072 |  |  |
Liabilities |  |  |  |  |
Payables for collateral under derivatives transactions | $ 17,524 | $ 20,937 |  |  |
Notes Payable, Related Party, Type [Extensible Enumeration] | Affiliated Entity | Affiliated Entity |  |  |
Junior subordinated debt securities | $ 3,161 | $ 3,158 |  |  |
Other liabilities | 35,805 | 25,933 |  |  |
Total liabilities | 657,331 | 632,947 |  |  |
Stockholders’ Equity |  |  |  |  |
Preferred stock, par value $0.01 per share; $3,905 aggregate liquidation preference | 0 | 0 |  |  |
Common stock, par value $0.01 per share; 3,000,000,000 shares authorized; 1,191,823,651 and 1,189,831,471 shares issued, respectively; 730,821,111 and 779,098,414 shares outstanding, respectively | 12 | 12 |  |  |
Additional paid-in capital | 33,690 | 33,616 |  |  |
Retained earnings | 40,146 | 40,332 |  | 31,824 |
Treasury stock, at cost; 461,002,540 and 410,733,057 shares, respectively | (24,591) | (21,458) |  |  |
Accumulated other comprehensive income (loss) | (19,242) | (22,621) |  | $ 315 |
Total stockholders’ equity | 30,015 | 29,881 |  |  |
Total liabilities and stockholders' equity | 687,584 | 663,072 |  |  |
Parent Company |  |  |  |  |
Investments: |  |  |  |  |
Estimated Fair Value of Fixed Maturity Securities AFS | 1,583 | 3,729 |  |  |
Short-term investments, principally at estimated fair value | 52 | 0 |  |  |
Other invested assets, at estimated fair value | 517 | 376 |  |  |
Total investments | 2,152 | 4,105 |  |  |
Cash and cash equivalents | 3,021 | 1,290 | $ 1,961 |  | $ 441
Accrued investment income | 9 | 20 |  |  |
Investment in subsidiaries | 43,838 | 42,736 |  |  |
Loans to subsidiaries | 305 | 95 |  |  |
Other assets | 667 | 724 |  |  |
Total assets | 49,992 | 48,970 |  |  |
Liabilities |  |  |  |  |
Payables for collateral under derivatives transactions | 265 | 154 |  |  |
Long-term debt — unaffiliated | 14,516 | 13,588 |  |  |
Long-term debt — affiliated | 1,585 | 1,676 |  |  |
Junior subordinated debt securities | 2,468 | 2,465 |  |  |
Other liabilities | 1,143 | 1,206 |  |  |
Total liabilities | 19,977 | 19,089 |  |  |
Stockholders’ Equity |  |  |  |  |
Preferred stock, par value $0.01 per share; $3,905 aggregate liquidation preference | 0 | 0 |  |  |
Common stock, par value $0.01 per share; 3,000,000,000 shares authorized; 1,191,823,651 and 1,189,831,471 shares issued, respectively; 730,821,111 and 779,098,414 shares outstanding, respectively | 12 | 12 |  |  |
Additional paid-in capital | 33,690 | 33,616 |  |  |
Retained earnings | 40,146 | 40,332 |  |  |
Treasury stock, at cost; 461,002,540 and 410,733,057 shares, respectively | (24,591) | (21,458) |  |  |
Accumulated other comprehensive income (loss) | (19,242) | (22,621) |  |  |
Total stockholders’ equity | 30,015 | 29,881 |  |  |
Total liabilities and stockholders' equity | $ 49,992 | $ 48,970 |  |  |

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