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Reinsurance (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Ceded Credit Risk [Line Items] |  |  |
Reinsurance, ACL | $ 317.0 | $ 205.0 |
Maximum retention per single insured life on fixed and VUL insurance contracts | $ 20.0 |  |
Percent of mortality risk reinsured on newly issued non-term life insurance contracts | 21.00% |  |
Reinsurance recoverables, net of allowance for credit losses | $ 19,443.0 | 22,386.0 |
Realized gain (loss) | 840.0 | (867.0) | $ (513.0)
Swiss Re [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Trust funded to support reinsurance receivable | 710,000.0 | 1,000.0 |
Reinsurance recoverables, net of allowance for credit losses |  | 1,600.0 |
Protective [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables, net of allowance for credit losses | 9,400.0 | 11,500.0 |
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments | 11.5 | 14,000.0 |
Athene Holding Ltd. [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance ACL and deposit assets | 3,800.0 | 5,000.0 |
Amount of amortization, after-tax, of deferred gain on business sold | 25.0 | 26.0 | $ 29.0
Reserves associated with modified coinsurance reinsurance arrangements | 3,809.0 | $ 5,404.0 |
Letter of credit | 117.0 |  |
Athene Holding Ltd. [Member] | Over-Collateralization [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reserves associated with modified coinsurance reinsurance arrangements | 105.0 |  |
Resolution Life [Member] |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance recoverables, net of allowance for credit losses | 4,700.0 |  |
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments | $ 4,100.0 |  |

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