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Market valuation of entity divided by earnings before interest, taxes, depreciation, and amortization (EBITDA), used as an input to measure fair value.

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Actuarially determined assumption around contract lapse rates used as in input in calculating fair value of future policy benefits (primarily embedded derivatives associated with living benefit features on annuity contracts.

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Fair Value Inputs Liquidation Premium

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Liquidation value of asset or liability used as an input to a fair value calculation.

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Actuarially determined assumption around client mortality rates used as in input in calculating fair value of future policy benefits (primarily embedded derivatives associated with living benefit features on annuity contracts.

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Fair value inputs option budget.

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Fair Value Inputs, Policyholder Age

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Fair Value Inputs Spread Over Sofr

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Actuarially determined assumption around utilization rates used as in input in calculating fair value of future policy benefits (primarily embedded derivatives associated with living benefit features on annuity contracts.

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Actuarially determined assumption around withdrawal rates used as in input in calculating fair value of future policy benefits (primarily embedded derivatives associated with living benefit features on annuity contracts.

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Quantitative Info Commercial Mortgage Backed Securities.

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Receivables from parent and affiliates.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder.

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Amount of asset position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of liability position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of investment in marketable security.

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Amount of assets classified as other.

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Amount due to policyholders for funds held that are returnable under the terms of insurance contracts, classified as other.

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Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Fair Value of Assets and Liabilities (Quantitative Info for Level 3 Inputs) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Corporate securities	$ 531,417	$ 824,270
Market risk benefits assets	2,499,234	2,367,243	$ 2,519,000
Other assets	2,934,252	2,078,938
Reinsurance recoverables	43,285,050	38,709,651
Receivables from parent and affiliates	618,259	332,583
Market risk benefit liabilities	4,915,163	5,144,401	$ 4,371,000
Fair Value, Measurements, Recurring
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Market risk benefits assets	2,499,234	2,367,243
Other assets	509,723	224,019
Reinsurance recoverables	201,559	69,745
Receivables from parent and affiliates	491,146	147,984
Market risk benefit liabilities	4,915,163	5,144,401
Policyholders’ account balances	11,854,608	7,689,929
Level 3
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Funds held under reinsurance agreements	$ 10,000,000
Level 3 \| Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Policyholder Age	50 years
Level 3 \| Minimum \| Market risk benefit liabilities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortality rate	0.00%
Level 3 \| Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair Value Inputs, Policyholder Age	90 years
Level 3 \| Fair Value, Measurements, Recurring
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Market risk benefits assets	$ 2,499,234	2,367,243
Other assets	509,723	224,019
Reinsurance recoverables	201,559	69,745
Receivables from parent and affiliates	339,041	0
Market risk benefit liabilities	4,915,163	5,144,401
Policyholders’ account balances	$ 11,854,608	$ 7,689,929
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Market risk benefit liabilities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	1.00%	1.00%
Spread over SOFR	0.37%	0.41%
Utilization rate	37.00%	38.00%
Withdrawal rate (greater than maximum range)	78.00%	81.00%
Mortality rate	0.00%	0.00%
Equity volatility curve	15.00%	15.00%
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Policyholders' account balances
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	0.00%	1.00%
Spread over SOFR	0.37%	0.41%
Mortality rate	0.00%	0.00%
Option budget	(1.00%)	(1.00%)
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate	6.66%	6.98%
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Commercial mortgage-backed securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidity premium	1.00%	0.60%
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Market risk benefit assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	1.00%	1.00%
Spread over SOFR	0.37%	0.41%
Utilization rate	37.00%	38.00%
Withdrawal rate (greater than maximum range)	78.00%	81.00%
Mortality rate	0.00%	0.00%
Equity volatility curve	15.00%	15.00%
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Other assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	1.00%	1.00%
Spread over SOFR	0.37%	0.41%
Mortality rate		0.00%
Option budget	0.00%	(1.00%)
Level 3 \| Internal \| Minimum \| Discounted cash flow \| Reinsurance Recoverables
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	0.00%
Spread over SOFR	0.37%
Option budget	(1.00%)
Level 3 \| Internal \| Minimum \| Market comparables \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
EBITDA multiples	5.0
Level 3 \| Internal \| Minimum \| Liquidation \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value		63.62%
Level 3 \| Internal \| Minimum \| Liquidation \| Receivable from parent and affiliates
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value	100.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Market risk benefit liabilities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	20.00%	20.00%
Spread over SOFR	1.85%	1.91%
Utilization rate	94.00%	95.00%
Withdrawal rate (greater than maximum range)	100.00%	100.00%
Mortality rate	16.00%	15.00%
Equity volatility curve	25.00%	25.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Policyholders' account balances
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	80.00%	80.00%
Spread over SOFR	1.85%	1.85%
Mortality rate	23.00%	23.00%
Option budget	7.00%	7.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate	20.00%	20.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Commercial mortgage-backed securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidity premium	1.00%	0.75%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Market risk benefit assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	20.00%	20.00%
Spread over SOFR	1.85%	1.91%
Utilization rate	94.00%	95.00%
Withdrawal rate (greater than maximum range)	100.00%	100.00%
Mortality rate	16.00%	15.00%
Equity volatility curve	25.00%	25.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Other assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	50.00%	80.00%
Spread over SOFR	1.84%	1.85%
Mortality rate		23.00%
Option budget	6.00%	7.00%
Level 3 \| Internal \| Maximum \| Discounted cash flow \| Reinsurance Recoverables
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Lapse rate	80.00%
Spread over SOFR	1.84%
Option budget	7.00%
Level 3 \| Internal \| Maximum \| Market comparables \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
EBITDA multiples	5.0
Level 3 \| Internal \| Maximum \| Liquidation \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value		63.62%
Level 3 \| Internal \| Maximum \| Liquidation \| Receivable from parent and affiliates
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value	100.00%
Level 3 \| Internal \| Weighted Average \| Discounted cash flow \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Discount rate	11.66%	9.73%
Level 3 \| Internal \| Weighted Average \| Discounted cash flow \| Commercial mortgage-backed securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidity premium	1.00%	0.71%
Level 3 \| Internal \| Weighted Average \| Market comparables \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
EBITDA multiples	5.0
Level 3 \| Internal \| Weighted Average \| Liquidation \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value		63.62%
Level 3 \| Internal \| Weighted Average \| Liquidation \| Receivable from parent and affiliates
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Liquidation value	100.00%
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Market risk benefit liabilities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Market risk benefit liabilities	$ 4,915,163	$ 5,144,401
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Policyholders' account balances
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Policyholders’ account balances	11,854,608	7,689,929
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Corporate securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Corporate securities	1,255,960	81,635
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Commercial mortgage-backed securities
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Commercial mortgage-backed securities	80,254	78,115
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Market risk benefit assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Market risk benefits assets	2,499,234	2,367,243
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Other assets
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Other assets	509,723	$ 224,019
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Reinsurance Recoverables
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Reinsurance recoverables	201,559
Level 3 \| Internal \| Fair Value, Measurements, Recurring \| Receivable from parent and affiliates
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Receivables from parent and affiliates	$ 319,181