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v3.23.1

Investments (Fixed Maturity Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] |  |  |
Fixed maturity securities, available for sale, due in one year or less, amortized cost | $ 702,112 |  |
Fixed maturity securities, available for sale, due after one year through five years, amortized cost | 6,122,055 |  |
Fixed maturity securities, available for sale, due after five years through ten years, amortized cost | 6,116,836 |  |
Fixed maturity securities, available for sale, due after ten years through twenty years, amortized cost | 8,790,928 |  |
Fixed maturity securities, available for sale, due after twenty years, amortized cost | 9,591,352 |  |
Fixed maturity securities, available for sale, securities with a single maturity date, amortized cost | 31,323,283 |  |
Amortized Cost | 43,784,431 | $ 44,866,019 |
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |  |  |
Fixed maturity securities, available for sale, due in one year or less, fair value | 696,244 |  |
Fixed maturity securities, available for sale, due after one year through five years, fair value | 5,914,199 |  |
Fixed maturity securities, available for sale, due after five years through ten years, fair value | 5,639,129 |  |
Fixed maturity securities, available for sale, due after ten years through twenty years, fair value | 8,046,303 |  |
Fixed maturity securities, available for sale, due after twenty years, fair value | 7,626,553 |  |
Fixed maturity securities, available for sale, securities with a single maturity date, fair value | 27,922,428 |  |
Fair Value | 39,555,624 | 39,804,617 | [1]
Residential mortgage backed securities |  |  |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, amortized cost | 1,455,263 |  |
Amortized Cost | 1,455,263 | 1,492,242 |
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, fair value | 1,355,858 |  |
Fair Value | 1,355,858 | 1,377,611 |
Commercial mortgage backed securities |  |  |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, amortized cost | 4,088,679 |  |
Amortized Cost | 4,088,679 | 4,098,755 |
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, fair value | 3,677,672 |  |
Fair Value | 3,677,672 | 3,687,478 |
Other asset backed securities |  |  |
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, amortized cost | 6,917,206 |  |
Amortized Cost | 6,917,206 | 6,289,923 |
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract] |  |  |
Fixed maturity securities, available for sale, securities without a single maturity date, fair value | 6,599,666 |  |
Fair Value | $ 6,599,666 | $ 5,908,702 |
[1] | Certain prior period amounts have been recast. See Note 1 - Significant Accounting Policies for more information.

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