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Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | $ 84,159 |  | $ 76,120 |
Separate account liabilities | 90,332 | $ 88,271 | 87,440 |
Universal Life Insurance |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 2,561 | 2,550 | 2,595 | $ 2,658
Separate account liabilities | 6,259 |  | 5,483 |
Total account balances | 8,820 |  | 8,078 |
Net amount at risk | 34,968 |  | 37,420 |
Cash surrender value | 8,245 |  | 7,449 |
Variable Annuities |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 4,170 | 4,307 | 4,767 | 4,908
Separate account liabilities | 81,792 | 79,990 | 79,770 | 77,653
Total account balances | 85,962 |  | 84,537 |
Net amount at risk | 12,269 |  | 14,894 |
Cash surrender value | 85,533 |  | 84,090 |
Index-linked Annuities |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 44,350 | 41,627 | 35,922 | 33,896
Separate account liabilities | 0 |  | 0 |
Total account balances | 44,350 |  | 35,922 |
Cash surrender value | 41,958 |  | 33,567 |
Fixed Rate Annuities |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 14,923 | 14,672 | 14,684 | 14,274
Separate account liabilities | 0 |  | 0 |
Total account balances | 14,923 |  | 14,684 |
Cash surrender value | 14,260 |  | 14,106 |
ULSG |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 4,984 | 5,052 | 5,219 | 5,307
Separate account liabilities | 0 |  | 0 |
Total account balances | 4,984 |  | 5,219 |
Net amount at risk | 64,837 |  | 70,062 |
Cash surrender value | 4,455 |  | 6,203 |
Company-Owned Life Insurance |  |  |  |
Net Amount at Risk by Product and Guarantee [Line Items] |  |  |  |
Policyholder Account Balance | 856 | 653 | 644 | 641
Separate account liabilities | 2,054 | $ 2,162 | 2,019 | $ 1,932
Total account balances | 2,910 |  | 2,663 |
Net amount at risk | 2,685 |  | 3,422 |
Cash surrender value | $ 2,381 |  | $ 2,443 |

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