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Fair Value of Assets and Liabilities
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value of Assets and Liabilities FAIR VALUE OF ASSETS AND LIABILITIES
Fair Value Measurement - Fair value represents the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The authoritative fair value guidance establishes a framework for measuring fair value that includes a hierarchy used to classify the inputs used in measuring fair value. The level in the fair value hierarchy within which the fair value measurement falls is determined based on the lowest level input that is significant to the fair value measurement. The levels of the fair value hierarchy are as follows:
Level 1 - Fair value is based on unadjusted quoted prices in active markets that are accessible to the Company for identical assets or liabilities. The Company’s Level 1 assets and liabilities primarily include certain cash equivalents and short-term investments, equity securities, derivative contracts that trade on an active exchange market, separate account assets and other liabilities.
Level 2 - Fair value is based on significant inputs, other than quoted prices included in Level 1, that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability through corroboration with observable market data. Level 2 inputs include quoted prices in active markets for similar assets and liabilities, quoted prices in markets that are not active for identical or similar assets or liabilities, and other market observable inputs. The Company’s Level 2 assets and liabilities include: fixed maturities (corporate public and private bonds, most government securities, certain asset-backed and mortgage-backed securities, etc.), certain equity securities (mutual funds, which do not trade in active markets because they are not publicly available), certain cash equivalents (primarily commercial paper), short-term investments and certain OTC derivatives and embedded derivatives resulting from reinsurance.
Level 3 - Fair value is based on at least one significant unobservable input for the asset or liability. The assets and liabilities in this category may require significant judgment or estimation in determining the fair value. The Company’s Level 3 assets and liabilities primarily include: certain private fixed maturities and equity securities, certain manually priced public equity securities and fixed maturities, certain highly structured OTC derivative contracts, contracts or contract features pertaining to living benefit features (market risk benefits) of the Company's variable annuity contracts and embedded derivatives associated with the index-linked features of certain universal life and annuity products.
Assets and Liabilities by Hierarchy Level - The tables below present the balances of assets and liabilities reported at fair value on a recurring basis, as of the dates indicated.
 December 31, 2023
Level 1Level 2Level 3Netting(1)Total
(in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$$975,287 $$$975,287 
Obligations of U.S. states and their political subdivisions776,627 776,627 
Foreign government bonds281,304 682 281,986 
U.S. corporate public securities9,495,912 9,495,912 
U.S. corporate private securities4,476,258 513,236 4,989,494 
Foreign corporate public securities1,698,965 7,129 1,706,094 
Foreign corporate private securities4,137,004 493,978 4,630,982 
Asset-backed securities(2)1,928,428 99,122 2,027,550 
Commercial mortgage-backed securities773,663 78,115 851,778 
Residential mortgage-backed securities396,070 396,070 
Subtotal24,939,518 1,192,262 26,131,780 
Market risk benefit assets2,367,243 2,367,243 
Fixed maturities, trading2,762,398 34,048 2,796,446 
Equity securities(3)790,346 11,285 28,709 830,340 
Short-term investments31,879 280,228 1,759 313,866 
Cash equivalents447,396 1,196,729 1,644,125 
Other invested assets(4)23,432 9,022,304 (9,028,019)17,718 
Other assets224,019 224,019 
Reinsurance recoverables69,745 69,745 
Receivables from parent and affiliates147,984 147,984 
Subtotal excluding separate account assets1,293,053 38,360,446 3,917,786 (9,028,019)34,543,266 
Separate account assets(5)(6)176,239 113,747,569 5,985 113,929,793 
Total assets$1,469,292 $152,108,015 $3,923,771 $(9,028,019)$148,473,059 
Market risk benefit liabilities$$$5,144,401 $$5,144,401 
Policyholders' account balances7,689,929 7,689,929 
Payables to parent and affiliates21,239,770 (18,588,647)2,651,123 
Other liabilities(7)8,032 6,340 (8,032)6,340 
Total liabilities$8,032 $21,246,110 $12,834,330 $(18,596,679)$15,491,793 
 December 31, 2022
 Level 1Level 2Level 3Netting(1)Total
 (in thousands)
Fixed maturities, available-for-sale:
U.S. Treasury securities and obligations of U.S. government authorities and agencies$$281,792 $$$281,792 
Obligations of U.S. states and their political subdivisions628,200 628,200 
Foreign government bonds272,738 724 273,462 
U.S. corporate public securities6,443,944 6,443,944 
U.S. corporate private securities3,573,269 243,460 3,816,729 
Foreign corporate public securities1,371,354 6,868 1,378,222 
Foreign corporate private securities3,509,162 257,168 3,766,330 
Asset-backed securities(2)1,421,852 20,502 1,442,354 
Commercial mortgage-backed securities573,930 84,222 658,152 
Residential mortgage-backed securities336,216 336,216 
Subtotal18,412,457 612,944 19,025,401 
Market risk benefit assets(8)1,393,237 1,393,237 
Fixed maturities, trading1,936,159 1,936,159 
Equity securities108,076 6,403 28,593 143,072 
Short-term investments81,215 16,945 98,160 
Cash equivalents1,432,182 1,432,182 
Other invested assets(4)4,223 7,680,827 (7,637,939)47,111 
Other assets141,041 141,041 
Receivables from parent and affiliates148,075 148,075 
Subtotal excluding separate account assets112,299 29,697,318 2,192,760 (7,637,939)24,364,438 
Separate account assets(5)(6)102,243 108,682,425 4,645 108,789,313 
Total assets$214,542 $138,379,743 $2,197,405 $(7,637,939)$133,153,751 
Market risk benefit liabilities(8)$$$5,521,601 $$5,521,601 
Policyholders' account balances3,502,096 3,502,096 
Payables to parent and affiliates18,653,159 (16,568,242)2,084,917 
Other liabilities(7)899 (9,496)(670)(9,267)
Total liabilities$899 $18,643,663 $9,023,697 $(16,568,912)$11,099,347 

(1)“Netting” amounts represent cash collateral of $(9,569) million and $(8,931) million as of December 31, 2023 and 2022, respectively.
(2)Includes credit-tranched securities collateralized by syndicated bank loans, sub-prime mortgages, auto loans, credit cards, education loans and other asset types.
(3)Equity securities excluded from the fair value hierarchy include a fund for which fair value is measured at net asset value ("NAV") per share (or its equivalent) as a practical expedient. As of December 31, 2023, the fair value of this investment was $14.6 million.
(4)Other invested assets excluded from the fair value hierarchy include certain hedge funds, private equity funds and other funds for which fair value is measured at NAV per share (or its equivalent) as a practical expedient. At December 31, 2023 and 2022, the fair values of such investments were $67 million and $69 million, respectively.
(5)Separate account assets represent segregated funds that are invested for certain customers. Investment risks associated with market value changes are borne by the customers, except to the extent of minimum guarantees made by the Company with respect to certain accounts. Separate account liabilities are not included in the above table as they are reported at contract value and not fair value in the Company's Consolidated Statements of Financial Position.
(6)Separate account assets included in the fair value hierarchy exclude investments in entities that calculate NAV per share (or its equivalent) as a practical expedient. Such investments excluded from the fair value hierarchy include investments in real estate, hedge funds and a corporate owned life insurance fund, for which fair value is measured at NAV per share (or its equivalent). At December 31, 2023 and 2022, the fair value of such investments was $5,259 million and $5,262 million, respectively.
(7)Other liabilities includes embedded derivatives associated with reinsurance agreements.
(8)Amounts reflect the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.
The methods and assumptions the Company uses to estimate the fair value of assets and liabilities measured at fair value on a recurring basis are summarized below.
Fixed Maturity Securities - The fair values of the Company’s public fixed maturity securities are generally based on prices obtained from independent pricing services. Prices for each security are generally sourced from multiple pricing vendors, and a vendor hierarchy is maintained by asset type based on historical pricing experience and vendor expertise. The Company ultimately uses the price from the pricing service highest in the vendor hierarchy based on the respective asset type. The pricing hierarchy is updated for new financial products and recent pricing experience with various vendors. Consistent with the fair value hierarchy described above, securities with validated quotes from pricing services are generally reflected within Level 2, as they are primarily based on observable pricing for similar assets and/or other market observable inputs. Typical inputs used by these pricing services include but are not limited to, reported trades, benchmark yields, issuer spreads, bids, offers, and/or estimated cash flow, prepayment speeds, and default rates. If the pricing information received from third-party pricing services is deemed not reflective of market activity or other inputs observable in the market, the Company may challenge the price through a formal process with the pricing service or classify the securities as Level 3. If the pricing service updates the price to be more consistent with the presented market observations, the security remains within Level 2.
Internally-developed valuations or indicative broker quotes are also used to determine fair value in circumstances where vendor pricing is not available, or where the Company ultimately concludes that pricing information received from the independent pricing services is not reflective of market activity. If the Company concludes the values from both pricing services and brokers are not reflective of market activity, it may override the information with an internally-developed valuation. As of December 31, 2023 and 2022, overrides on a net basis were not material. Pricing service overrides, internally-developed valuations and indicative broker quotes are generally included in Level 3 in the fair value hierarchy.
The Company conducts several specific price monitoring activities. Daily analyses identify price changes over predetermined thresholds defined at the financial instrument level. Various pricing integrity reports are reviewed on a daily and monthly basis to determine if pricing is reflective of market activity or if it would warrant any adjustments. Other procedures performed include, but are not limited to, reviews of third-party pricing services methodologies, reviews of pricing trends and back testing.
The fair values of private fixed maturities, which are originated by internal private asset managers, are primarily determined using discounted cash flow models. These models primarily use observable inputs that include Treasury or similar base rates plus estimated credit spreads to value each security. The credit spreads are obtained through a survey of private market intermediaries who are active in both primary and secondary transactions, and consider, among other factors, the credit quality and the reduced liquidity associated with private placements. Internal adjustments are made to reflect variation in observed sector spreads. Since most private placements are valued using standard market observable inputs and inputs derived from, or corroborated by, market observable data including, but not limited to observed prices and spreads for similar publicly or privately traded issues, they have been reflected within Level 2. For certain private fixed maturities, the discounted cash flow model may incorporate significant unobservable inputs, which reflect the Company’s own assumptions about the inputs that market participants would use in pricing the asset. To the extent management determines that such unobservable inputs are significant to the price of a security, a Level 3 classification is made.
Equity Securities - Equity securities consist principally of investments in common and preferred stock of publicly traded companies, privately traded securities, as well as mutual fund shares. The fair values of most publicly traded equity securities are based on quoted market prices in active markets for identical assets and are classified within Level 1 in the fair value hierarchy. Estimated fair values for most privately traded equity securities are determined using discounted cash flow, earnings multiple and other valuation models that require a substantial level of judgment around inputs and therefore are classified within Level 3. The fair values of mutual fund shares that transact regularly (but do not trade in active markets because they are not publicly available) are based on transaction prices of identical fund shares and are classified within Level 2 in the fair value hierarchy.
Derivative Instruments - Derivatives are recorded at fair value either as assets, within “Other invested assets”, or as liabilities within “Payables to parent and affiliates” or "Other liabilities", except for embedded derivatives which are recorded with the associated host contract. The fair values of derivative contracts can be affected by changes in interest rates, foreign exchange rates, credit spreads, market volatility, expected returns, NPR, liquidity and other factors.
The Company's exchange-traded futures and options include treasury and equity futures. Exchange-traded futures and options are valued using quoted prices in active markets and are classified within Level 1 in the fair value hierarchy.
The majority of the Company’s derivative positions are traded in the OTC derivative market and are classified within Level 2 in the fair value hierarchy. OTC derivatives classified within Level 2 are valued using models that utilize actively quoted or observable market inputs from external market data providers, third-party pricing vendors and/or recent trading activity. The Company’s policy is to use mid-market pricing in determining its best estimate of fair value. The fair values of most OTC derivatives, including interest rate and cross-currency swaps, currency forward contracts and credit default swaps are determined using discounted cash flow models. The fair values of European style option contracts are determined using Black-Scholes option pricing models. These models’ key inputs include the contractual terms of the respective contract, along with significant observable inputs, including interest rates, currency rates, credit spreads, equity prices, index dividend yields, NPR, volatility and other factors.
The Company’s cleared interest rate swaps and credit derivatives linked to an index are valued using models that utilize actively quoted or observable market inputs, including SOFR, obtained from external market data providers, third-party pricing vendors and/or recent trading activity. These derivatives are classified as Level 2 in the fair value hierarchy.
Cash Equivalents and Short-Term Investments - Cash equivalents and short-term investments include money market instruments, commercial paper and other highly liquid debt instruments. Certain money market instruments are valued using unadjusted quoted prices in active markets that are accessible for identical assets and are primarily classified as Level 1. The remaining instruments in this category are generally fair valued based on market observable inputs and these investments have primarily been classified within Level 2.
Separate Account Assets - Separate account assets include fixed maturity securities, treasuries, equity securities, real estate, mutual funds and commercial mortgage loans for which values are determined consistent with similar instruments described above under “Fixed Maturity Securities” and “Equity Securities”.
Receivables from Parent and Affiliates - Receivables from parent and affiliates carried at fair value include affiliated bonds within the Company’s legal entity where fair value is determined consistent with similar securities described above under “Fixed Maturity Securities” managed by affiliated asset managers.
Other Assets - Consists primarily of deposit assets related to reinsurance agreements using deposit accounting under U.S. GAAP, which include amounts representing the fair value of embedded derivative instruments associated with the index-linked features of certain annuity products. The methods and assumptions used to estimate the fair value are consistent with those described below in “Policyholders' account balances”.
Reinsurance Recoverables - Reinsurance recoverables primarily includes an embedded derivative associated with receivables from modified coinsurance arrangements.
Market Risk Benefits - As a result of the adoption of ASU 2018-12 in the first quarter of 2023, the Company is required to measure all market risk benefits (e.g., living benefit and death benefit guarantees associated with variable annuities) at fair value. Market risk benefit liabilities (or assets) represent contracts or contract features that provide protection to the contractholder and expose the insurance entity to other than nominal capital market risk, primarily related to deferred annuities with guaranteed minimum benefits in the annuities products including GMDB, GMIB, GMAB, GMWB and GMIWB. The benefits are bundled together and accounted for as single compound market risk benefits using a fair value measurement framework.
The fair value of these market risk benefits is calculated as the present value of expected future benefit payments to contractholders less the present value of expected future rider fees attributable to the market risk benefits. The fair value of these benefit features is based on assumptions a market participant would use in valuing market risk benefits. This methodology could result in either a liability or asset balance, given changing capital market conditions and various actuarial assumptions. Since there is no observable active market for the transfer of these obligations, the valuations are calculated using internally-developed models with option pricing techniques. The models are based on a risk neutral valuation framework and incorporate premiums for risks inherent in valuation techniques, inputs, and the general uncertainty around the timing and amount of future cash flows. The determination of these risk premiums requires the use of management’s judgment.

The significant inputs to the valuation models for these market risk benefits include capital market assumptions, such as interest rate levels and volatility assumptions, the Company’s market-perceived NPR, as well as actuarially determined assumptions, including contractholder behavior, such as lapse rates, benefit utilization rates, withdrawal rates, and mortality rates. Since many of these assumptions are unobservable and are considered to be significant inputs to the valuations, the assets and liabilities included in market risk benefits have been reflected within Level 3 in the fair value hierarchy.
Capital market inputs and actual policyholders’ account values are updated each quarter based on capital market conditions as of the end of the quarter, including interest rates, equity markets and volatility. In the risk neutral valuation, the initial swap curve drives the total return used to grow the policyholders’ account values. The Company’s discount rate assumption is based on the SOFR swap curve adjusted for an additional spread relative to SOFR to reflect the Company’s market-perceived NPR, which is the risk that the obligation will not be fulfilled by the Company. NPR is primarily estimated by utilizing the credit spreads associated with the Company issued funding agreements, adjusted for any illiquidity risk premium. In order to reflect the financial strength ratings of the Company, credit spreads associated with funding agreements, as opposed to credit spread associated with debt, are utilized in developing this estimate because funding agreements, living benefit guarantees, and index-linked interest crediting guarantees are insurance liabilities and are therefore senior to debt.

Actuarial assumptions, including contractholder behavior and mortality, are reviewed at least annually, and updated based upon company emerging experience and industry studies, future expectations and other data, including any observable market data. These assumptions are generally updated annually unless a material change that the Company feels is indicative of a long-term trend is observed in an interim period.
Policyholders' Account Balances - The liability for policyholders’ account balances is related to certain embedded derivative instruments associated with certain universal life and annuity products that provide policyholders with index-linked interest credited over contract specified term periods. The fair values of these liabilities are determined using discounted cash flow models which include capital market assumptions such as interest rates and equity index volatility assumptions, the Company’s market-perceived NPR and actuarially determined assumptions for mortality, lapses and projected hedge costs.
As there is no observable active market for these liabilities, the fair value is determined as the present value of account balances paid to policyholders in excess of contractually guaranteed minimums using option pricing techniques for index term periods that contain deposits as of the valuation date, and the expected option cost for future index term periods, where the terms of index crediting rates have not yet been declared by the Company. Premiums for risks inherent in valuation techniques, inputs, and the general uncertainty around the timing and amount of future cash flows are also incorporated in the fair value of these liabilities. Since the valuation of these liabilities require the use of management’s judgment to determine these risk premiums and the use of unobservable inputs, these liabilities are reflected within Level 3 in the fair value hierarchy.
Capital market inputs, including interest rates and equity market volatility, and actual policyholders’ account values are updated each quarter. Actuarial assumptions are reviewed at least annually and updated based upon emerging experience, future expectations and other data, including any observable market data. Aside from these annual updates, assumptions are generally updated only if a material change is observed in an interim period that the Company believes is indicative of a long-term trend.
Other Liabilities - Other liabilities primarily includes an embedded derivative associated with certain funds withheld reinsurance arrangements that are described in Note 11. The fair value of the liability is determined based on the valuation of the underlying funds withheld assets identified to support the payable due to the applicable reinsurance counterparties.
Quantitative Information Regarding Internally-Priced Level 3 Assets and Liabilities - The tables below present quantitative information regarding significant internally-priced Level 3 assets and liabilities.
 December 31, 2023
 Fair Value    Valuation  
Techniques
Unobservable 
Inputs  
Minimum  MaximumWeighted
Average
Impact of 
Increase in Input on Fair Value(1)
 (in thousands)
Assets:
Corporate securities(2)$81,635 Discounted cash flowDiscount rate6.98 %20 %9.73 %Decrease
LiquidationLiquidation value63.62 %63.62 %63.62 %Increase
Commercial mortgage-backed securities$78,115 Discounted cash flowLiquidity premium0.60 %0.75 %0.71 %Decrease
Market risk benefit assets(4)$2,367,243 Discounted cash flowLapse rate(5)%20 %Increase
Spread over SOFR(6)0.41 %1.91 %Increase
Utilization rate(7)38 %95 %Decrease
Withdrawal rateSee table footnote (8) below.
Mortality rate(9)%15 %Increase
Equity volatility curve15 %25 %Decrease
Other assets$224,019 Discounted cash flowLapse rate(5)%80 %Increase
Spread over SOFR(6)0.41 %1.85 %Increase
Mortality rate(9)%23 %Increase
Equity volatility curve%25 %Decrease
Option Budget(11)(1)%%Decrease
Liabilities:
Market risk benefit liabilities(4)$5,144,401 Discounted cash flowLapse rate(5)%20 %Decrease
Spread over SOFR(6)0.41 %1.91 %Decrease
Utilization rate(7)38 %95 %Increase
Withdrawal rateSee table footnote (8) below.
Mortality rate(9)%15 %Decrease
Equity volatility curve15 %25 %Increase
Policyholders' account balances(10)$7,689,929 Discounted cash flowLapse rate(5)%80 %Decrease
Spread over SOFR(6)0.41 %1.85 %Decrease
Mortality rate(9)%23 %Decrease
Equity volatility curve%25 %Increase
Option Budget(11)(1)%%Increase
 December 31, 2022
 Fair ValueValuation 
Techniques
Unobservable 
Inputs   
MinimumMaximumWeighted
Average
Impact of 
Increase in Input on Fair Value(1)
 (in thousands)
Assets:
Corporate securities(2)$408,494 Discounted cash flowDiscount rate9.77 %20 %16.53 %Decrease
Market ComparablesEBITDA multiples(3)2.2 X23.5 X8.1 XIncrease
Market risk benefit assets(4)(12)$1,393,237 Discounted cash flowLapse rate(5)%20 %Increase
Spread over SOFR(6)0.50 %2.20 %Increase
Utilization rate(7)38 %95 %Decrease
Withdrawal rateSee table footnote (8) below.
Mortality rate(9)%15 %Increase
Equity volatility curve18 %26 %Decrease
Liabilities:
Market risk benefit liabilities(4)(12)$5,521,601 Discounted cash flowLapse rate(5)%20 %Decrease
Spread over SOFR(6)0.50 %2.20 %Decrease
Utilization rate(7)38 %95 %Increase
Withdrawal rateSee table footnote (8) below.
Mortality rate(9)%15 %Decrease
Equity volatility curve18 %26 %Increase
Policyholders' account balances(10)$3,502,096 Discounted cash flowLapse rate(5)%80 %Decrease
Spread over SOFR(6)0.22 %2.26 %Decrease
Mortality rate(9)%23 %Decrease
Equity volatility curve%30 %Increase
Option Budget(11)(2)%%Increase
(1)Conversely, the impact of a decrease in input would have the opposite impact on fair value as that presented in the table.
(2)Includes assets classified as fixed maturities, available-for-sale.
(3)Represents multiples of earnings before interest, taxes, depreciation and amortization ("EBITDA"), and are amounts used when the Company has determined that market participants would use such multiples when valuing the investments.
(4)Market risk benefits primarily represent fair value for all living benefit guarantees including accumulation, withdrawal and income benefits. Since the valuation methodology for these assets and liabilities uses a range of inputs that vary at the contract level over the cash flow projection period, presenting a range, rather than weighted average, is a more meaningful representation of the unobservable inputs used in the valuation.
(5)Lapse rates for contracts with living benefit guarantees are adjusted at the contract level based on the in-the-moneyness of the living benefit and reflect other factors, such as the applicability of any surrender charges. Lapse rates are reduced when contracts are more in-the-money. Lapse rates for contracts with index-linked crediting guarantees may be adjusted at the contract level based on the applicability of any surrender charges, product type, and market related factors such as interest rates. Lapse rates are also generally assumed to be lower for the period where surrender charges apply. For any given contract, lapse rates vary throughout the period over which cash flows are projected for the purposes of valuing these balances.
(6)The spread over the SOFR swap curve and the LIBOR swap curve represents the premium added to the proxy for the risk-free rate (SOFR or LIBOR, as applicable) to reflect the Company's estimates of rates that a market participant would use to value the living benefits in both the accumulation and payout phases and index-linked interest crediting guarantees as of December 31, 2023 and 2022, respectively. This spread includes an estimate of NPR, which is the risk that the obligation will not be fulfilled by the Company. NPR is primarily estimated by utilizing the credit spreads associated with issuing funding agreements, adjusted for any illiquidity risk premium. In order to reflect the financial strength ratings of the Company, credit spreads associated with funding agreements, as opposed to credit spread associated with debt, are utilized in developing this estimate because funding agreements are insurance liabilities and are therefore senior to debt. Effective April 2023, the Company entered into an agreement with The Ohio National Life Insurance Company, now known as AuguStar Life Insurance Company ("AuguStar"), an affiliate of Constellation Insurance Holdings, Inc., to reinsure approximately $10 billion of account values of PDI traditional variable annuity contracts with guaranteed living benefits. See Note 11 for additional information regarding this transaction. As a result of this transaction, a ceded MRB asset balance was established to fair value the reinsurance reimbursements to the Company. The establishment of the fair value also required an estimate of NPR for AuguStar, which may differ from that of the Company's; however, the NPR spreads for AuguStar were developed using a methodology similar to that of the Company.
(7)The utilization rate assumption estimates the percentage of contracts that will utilize the benefit during the contract duration and begin lifetime withdrawals at various time intervals from contract inception. The remaining contractholders are assumed to either begin lifetime withdrawals immediately or never utilize the benefit. Utilization assumptions may vary by product type, tax status and age. The impact of changes in these assumptions is highly dependent on the product type, the age of the contractholder at the time of the sale, and the timing of the first lifetime income withdrawal. Range reflects the utilization rate for the vast majority of business with living benefits.
(8)The withdrawal rate assumption estimates the magnitude of annual contractholder withdrawals relative to the maximum allowable amount under the contract. These assumptions vary based on the age of the contractholder, the tax status of the contract and the duration since the contractholder began lifetime withdrawals. As of December 31, 2023 and 2022, the minimum withdrawal rate assumption is 81% and 77%, respectively. As of December 31, 2023 and 2022, the maximum withdrawal rate assumption may be greater than 100%. The fair value of the liability will generally increase the closer the withdrawal rate is to 100% and decrease as the withdrawal rate moves further away from 100%.
(9)The range reflects the mortality rates for the vast majority of business with living benefits and other contracts, with policyholders ranging from 50 to 90 years old. While the majority of living benefits have a minimum age requirement, certain other contracts do not have an age restriction. This results in contractholders with mortality rates approaching 0% for certain benefits. Mortality rates may vary by product, age and duration. A mortality improvement assumption is also incorporated into the overall mortality table.
(10)Policyholders’ account balances primarily represent general account liabilities for the index-linked interest credited on certain of the Company’s life and annuity products that are accounted for as embedded derivatives. Since the valuation methodology for these liabilities uses a range of inputs that vary at the contract level over the cash flow projection period, presenting a range, rather than weighted average, is a more meaningful representation of the unobservable inputs used in the valuation.
(11)Option budget estimates the expected long-term cost of options used to hedge exposures associated with equity price and interest rate changes. The level of option budget determines future costs of the options, which impacts the growth in account value and the valuation of embedded derivatives.
(12)Amounts reflect the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

Interrelationships Between Unobservable Inputs - In addition to the sensitivities of fair value measurements to changes in each unobservable input in isolation, as reflected in the table above, interrelationships between these inputs may also exist, such that a change in one unobservable input may give rise to a change in another, or multiple, inputs. Examples of such interrelationships for significant internally-priced Level 3 assets and liabilities are as follows:
Corporate Securities – The rate used to discount future cash flows reflects current risk-free rates plus credit and liquidity spread requirements that market participants would use to value an asset. The discount rate may be influenced by many factors, including market cycles, expectations of default, collateral, term and asset complexity. Each of these factors can influence discount rates, either in isolation, or in response to other factors. During weaker economic cycles, as the expectations of default increases, credit spreads widen, which results in a decrease in fair value.
Commercial Mortgage-backed Securities – Interrelationships may exist between the prepayment rate, the default rate and/or loss severity, depending on specific market conditions. In stronger economic cycles, prepayment rates are generally driven by underlying property appreciation and subsequent cash-out refinances, while default rates and loss severity may be lower. During weaker economic cycles, prepayment rates may decline, while default rates and loss severity increase. Generally, a change in the assumption used for the probability of default would be accompanied by a directionally similar change in the assumption used for the loss severity and a directionally opposite change in the assumption used for prepayment rates. The impact of these factors on average life and economics varies with the deal structure and tranche subordination.
Market Risk Benefits – The Company expects efficient benefit utilization and withdrawal rates to generally be correlated with lapse rates. However, behavior is generally highly dependent on the facts and circumstances surrounding the individual contractholder, such as their liquidity needs or tax situation, which could drive lapse behavior independent of other contractholder behavior assumptions. To the extent more efficient contractholder behavior results in greater in-the-moneyness at the contract level, lapse rates may decline for those contracts. Similarly, to the extent that increases in equity volatility are correlated with overall declines in the capital markets, lapse rates may decline as contracts become more in-the-money.
Changes in Level 3 Assets and Liabilities - The following tables describe changes in fair values of Level 3 assets and liabilities as of the dates indicated, as well as the portion of gains or losses included in income attributable to unrealized gains or losses related to those assets and liabilities still held at the end of their respective periods (excluding MRBs disclosed in Note 10). When a determination is made to classify assets and liabilities within Level 3, the determination is based on significance of the unobservable inputs in the overall fair value measurement. All transfers are based on changes in the observability of the valuation inputs, including the availability of pricing service information that the Company can validate. Transfers into Level 3 are generally the result of unobservable inputs utilized within valuation methodologies and the use of indicative broker quotes for assets that were previously valued using observable inputs. Transfers out of Level 3 are generally due to the use of observable inputs in valuation methodologies as well as the availability of pricing service information for certain assets that the Company can validate.
Year Ended December 31, 2023(6)(7)
Fair Value, beginning of periodTotal realized and unrealized gains (losses)PurchasesSalesIssuancesSettlementsOther(1)Transfers into Level 3Transfers out of Level 3Fair Value, end of periodUnrealized gains (losses) for assets still held(2)
(in thousands)
Fixed maturities, available-for-sale:
Foreign government$724 $(42)$$$$$$$$682 $(53)
Corporate securities(3)507,496 85 567,936 (39,722)(130,688)3,129 117,671 (11,564)1,014,343 (973)
Structured securities(4)104,724 (4,442)241,159 (37)(2,147)(2,222)4,537 (164,335)177,237 (4,298)
Other assets:
Fixed maturities, trading1,083 36,284 2,931 (6,250)34,048 1,225 
Equity securities28,593 (928)2,531 (1,487)28,709 (928)
Other invested assets
Short-term investments16,945 2,573 4,922 (21,322)(1,359)1,759 
Other assets141,041 (40,062)145,922 (22,882)224,019 (62,944)
Reinsurance recoverables(5)(3,034)75,143 (2,364)69,745 (3,034)
Separate account assets4,645 408 2,216 (1,124)(160)5,985 406 
Liabilities:
Policyholders' account balances(5)(3,502,096)(2,641,436)(1,653,028)106,631 (7,689,929)(360,807)
Year Ended December 31, 2023(6)
Total realized and unrealized gains (losses)Unrealized gains (losses) for assets still held(2)
Realized investment gains (losses), netOther income (loss)Interest credited to policyholders' account balancesIncluded in other comprehensive income (loss)Net investment incomeRealized investment gains (losses), netOther income (loss)Interest credited to policyholders' account balancesIncluded in other comprehensive income (loss)
(in thousands)
Fixed maturities, available-for-sale$(2,081)$$$(2,808)$490 $(2,904)$$$(2,420)
Other assets:
Fixed maturities, trading1,080 1,225 
Equity securities(928)(928)
Other invested assets
Short-term investments1,857 (73)789 
Other assets(40,062)(62,944)
Reinsurance recoverables(3,034)(3,034)
Separate account assets408 406 
Liabilities:
Policyholders' account balances(2,641,436)(360,807)
Year Ended December 31, 2022(6)(7)
Fair Value, beginning of periodTotal realized and unrealized gains (losses)PurchasesSalesIssuancesSettlementsOther(1)Transfers into Level 3Transfers out of Level 3Fair Value, end of periodUnrealized gains (losses) for assets still held(2)
(in thousands)
Fixed maturities, available-for-sale:
Foreign government$150 $73 $501 $$$$$$$724 $69 
Corporate securities(3)385,634 (47,296)323,603 (62,827)(102,377)106,408 10,475 (106,124)507,496 (45,235)
Structured securities(4)173,944 (26,318)81,576 (1,993)(122,485)104,724 (28,489)
Other assets:
Equity securities12,472 (3,310)10,000 (230)9,661 28,593 (3,872)
Short-term investments114 18,046 (8,560)7,290 55 16,945 73 
Other assets72,937 44,096 49,677 (3,855)(21,814)141,041 47,951 
Separate account assets(70)7,715 (3,000)4,645 (70)
Liabilities:
Policyholders' account balances(5)(3,245,773)(409,912)(1,094,824)1,248,413 (3,502,096)(289,548)
Year Ended December 31, 2022(6)
Total realized and unrealized gains (losses)Unrealized gains (losses) for assets still held(2)
Realized investment gains (losses), netOther income (loss)Interest credited to policyholders' account balancesIncluded in other comprehensive income (loss)Net investment incomeRealized investment gains (losses), netOther income (loss)Interest credited to policyholders' account balancesIncluded in other comprehensive income (loss)
(in thousands)
Fixed maturities, available-for-sale$(16,829)$$$(56,470)$(242)$(14,416)$$$(59,239)
Other assets:
Equity securities(3,310)(3,872)
Short-term investments77 73 (36)73 
Other assets44,096 47,951 
Separate account assets(70)(70)
Liabilities:
Policyholders' account balances(409,912)(289,548)
Year Ended December 31, 2021(6)
Total realized and unrealized gains (losses)Unrealized gains (losses) for assets still held(2)
Realized investment gains (losses), netOther income (loss)Included in other comprehensive income (loss)Net investment incomeRealized investment gains (losses), netOther income (loss)Included in other comprehensive income (loss)
(in thousands)
Fixed maturities, available-for-sale$(832)$$(6,318)$388 $(1,778)$$(5,346)
Other assets:
Fixed maturities, trading46 46 
Equity securities709 709 
Short-term investments181 
Cash equivalents147 
Other assets1,258 359 
Liabilities:
Policyholders' account balances(78,321)5,476 

(1)"Other" largely represents non-cash moves related to novated variable indexed annuities under the reinsurance agreement with FLIAC. See Note 11 for more details regarding these transactions. In addition, for the prior year Policyholders' account balances represents an out of period adjustment related to certain portions of reinsurance activity that had been incorrectly recorded on the balance sheet during the fourth quarter of 2021.
(2)Unrealized gains or losses related to assets still held at the end of the period do not include amortization or accretion of premiums and discounts.
(3)Includes U.S. corporate public, U.S. corporate private, foreign corporate public, and foreign corporate private securities.
(4)Includes asset-backed and commercial mortgage-backed securities.
(5)Purchases/issuances and settlements for Policyholders' account balances and Reinsurance recoverables are presented net in the rollforward.
(6)Effective January 1, 2021, Future policy benefits previously included in "Changes in Level 3 Assets and Liabilities" are now reported as Market Risk Benefits. See Note 10 for additional information.
(7)Excludes MRB assets of $2,367 million and $1,393 million and MRB liabilities of $5,144 million and $5,522 million as of December 31, 2023 and 2022, respectively. See Note 10 for additional information.

Nonrecurring Fair Value Measurements - The following tables represent information for assets measured at fair value on a nonrecurring basis. The fair value measurement is nonrecurring as these assets are measured at fair value only when there is a triggering event (e.g., an evidence of impairment). Assets included in the table are those that were impaired during the respective reporting periods and that are still held as of the reporting date. The estimated fair values for these amounts were determined using significant unobservable inputs (Level 3). For the years ended December 31, 2023 and 2021, there were no triggering events.
Years Ended December 31,
202320222021
(in thousands)
Equity in earnings of operating joint venture, net of taxes
Investment in joint venture$$(75,000)$
Gains (Losses):
Other invested assets$$(11,125)$
December 31, 2023December 31, 2022
(in thousands)
Carrying value after measurement as of period end:
Investment in joint venture(1)$$60,456 
(1)Reported carrying value includes value as of the measurement period of June 30, 2022 for "Investment in joint venture".
Fair Value of Financial Instruments
The tables below present the carrying amount and fair value by fair value hierarchy level of certain financial instruments that are not reported at fair value. The financial instruments presented below are reported at carrying value on the Company’s Consolidated Statements of Financial Position. In some cases, as described below, the carrying amount equals or approximates fair value.
 December 31, 2023
Fair ValueCarrying
Amount(1)
Level 1Level 2Level 3TotalTotal
 (in thousands)
Assets:
Commercial mortgage and other loans$$$5,918,386 $5,918,386 $6,122,721 
Policy loans1,472,677 1,472,677 1,472,677 
Short-term investments66,500 66,500 66,500 
Cash and cash equivalents470,668 24,999 495,667 495,667 
Accrued investment income333,838 333,838 333,838 
Reinsurance recoverables22,155 22,155 23,537 
Receivables from parent and affiliates184,599 184,599 184,599 
Other assets80,646 1,489,983 1,570,629 1,570,629 
Total assets$537,168 $624,082 $8,903,201 $10,064,451 $10,270,168 
Liabilities:
Policyholders’ account balances - investment contracts$$955,647 $5,396,885 $6,352,532 $6,368,061 
Cash collateral for loaned securities218,310 218,310 218,310 
Short-term debt to affiliates176,110 176,110 180,411 
Payables to parent and affiliates16,573 16,573 16,573 
Other liabilities2,121,861 32,423 2,154,284 2,154,283 
Total liabilities$$3,488,501 $5,429,308 $8,917,809 $8,937,638 
 December 31, 2022
  
Fair ValueCarrying
Amount(1)
 Level 1Level 2Level 3TotalTotal
 (in thousands)
Assets:
Commercial mortgage and other loans$$$4,602,177 $4,602,177 $4,928,680 
Policy loans505,367 505,367 505,367 
Short-term investments26,331 26,331 26,331 
Cash and cash equivalents675,445 290,000 965,445 965,445 
Accrued investment income219,635 219,635 219,635 
Reinsurance recoverables25,127 25,127 27,183 
Receivables from parent and affiliates76,846 76,846 76,846 
Other assets94,200 730,682 824,882 824,882 
Total assets$701,776 $680,681 $5,863,353 $7,245,810 $7,574,369 
Liabilities:
Policyholders’ account balances - investment contracts$$1,192,271 $3,141,000 $4,333,271 $4,351,945 
Cash collateral for loaned securities86,750 86,750 86,750 
Short-term debt to affiliates120,325 120,325 126,250 
Long-term debt to affiliates173,905 173,905 185,563 
Payables to parent and affiliates41,654 41,654 41,654 
Other liabilities1,269,615 33,250 1,302,865 1,302,866 
Total liabilities$$2,884,520 $3,174,250 $6,058,770 $6,095,028 
(1)Carrying values presented herein differ from those in the Company’s Consolidated Statements of Financial Position because certain items within the respective financial statement captions are not considered financial instruments or out of scope under authoritative guidance relating to disclosures of the fair value of financial instruments.
The fair values presented above have been determined by using available market information and by applying market valuation methodologies, as described in more detail below.
Commercial Mortgage and Other Loans
The fair value of most commercial mortgage loans is based upon the present value of the expected future cash flows discounted at the appropriate U.S. Treasury rate or foreign government bond rate (for non-U.S. dollar-denominated loans) plus an appropriate credit spread for loans of similar quality, average life and currency. The quality ratings for these loans, a primary determinant of the credit spreads and a significant component of the pricing process, are based on an internally-developed methodology. Certain commercial mortgage loans are valued incorporating other factors, including the terms of the loans, the relative strength of the underlying collateral, the principal exit strategies for the loans, prevailing interest rates and credit risk.
Policy Loans
The Company's valuation technique for policy loans is to discount cash flows at the current policy loan coupon rate. Policy loans are fully collateralized by the cash surrender value of underlying insurance policies. As a result, the carrying value of the policy loans approximates the fair value.
Short-Term Investments, Cash and Cash Equivalents, Accrued Investment Income, Receivables from Parent and Affiliates
The Company believes that due to the short-term nature of certain assets, the carrying value approximates fair value. These assets include: certain short-term investments, which are not securities, recorded at amortized cost; cash and cash equivalent instruments, accrued investment income.
Reinsurance Recoverables
Reinsurance recoverables include corresponding receivables associated with modified coinsurance arrangements and other reinsurance arrangements between the Company and related parties. See Note 11 for additional information about the Company's reinsurance arrangements.
Other Assets
Other assets primarily consists of deposit assets related to the reinsurance agreements with Pruco Life and a third-party reinsurer, which uses deposit accounting under U.S. GAAP. The deposit assets are adjusted as amounts are paid, consistent with the underlying contracts. Also included are other assets that meet the definition of financial instruments, including receivables such as unsettled trades and accounts receivable.
Policyholders’ Account Balances - Investment Contracts
Only the portion of policyholders’ account balances related to products that are investment contracts (those without significant mortality or morbidity risk) are reflected in the table above. For fixed deferred annuities, payout annuities and other similar contracts without life contingencies, fair values are generally derived using discounted projected cash flows based on interest rates that are representative of the Company’s financial strength ratings, and hence reflect the Company’s NPR. For those balances that can be withdrawn by the customer at any time without prior notice or penalty, the fair value is the amount estimated to be payable to the customer as of the reporting date, which is generally the carrying value.
Cash Collateral for Loaned Securities
Cash collateral for loaned securities represents the collateral received or paid in connection with loaning or borrowing securities. Due to the short-term nature of these transactions, the carrying value approximates fair value.
Debt
The fair value of short-term and long-term debt is generally determined by either prices obtained from independent pricing services, which are validated by the Company, or discounted cash flow models. These fair values consider the Company’s NPR. Discounted cash flow models predominately use market observable inputs such as the borrowing rates currently available to the Company for debt and financial instruments with similar terms and remaining maturities. For debt with a maturity of less than 90 days, the carrying value approximates fair value.
Other Liabilities and Payables to Parent and Affiliates
Other liabilities includes the funds withheld liability for assets retained under the reinsurance agreement that corresponds to the deposit assets above in "Other Assets". Also included are unsettled trades, drafts, and escrow deposits. Payables to parent and affiliates is primarily related to accrued expense payables. Due to the short term until settlement of most of these liabilities, the Company believes that carrying value approximates fair value.