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Separate Accounts (Schedule of Reconciliation of Separate Account Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | $ 153,246 | $ 143,536 |
UL and Other [Member] |  |  |
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | 23,409 | 20,920 | $ 24,785
Variable Annuities [Member] |  |  |
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | 110,998 | 105,573 | 136,665
Retirement Plan Services [Member] |  |  |
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | 18,789 | 16,996 | $ 21,068
Other Operations [Member] |  |  |
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | 50 | 47 |
Reinsurance Agreement [Member] |  |  |
Fair Value, Separate Account Investment [Line Items] |  |  |
Separate account liabilities | $ 45 | $ 42 |

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