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Fair Values of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
The following tables present additional information about our private equity partnerships, including commitments for additional investments which may or may not be funded:

September 30, 2020
Investment CategoryFair ValueRedemption Term / Redemption NoticeUnfunded Commitments
(in millions of dollars)(in millions of dollars)
Private Credit(a)$221.0 Not redeemable$193.3 
40.1 Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice— 
Total Private Credit261.1 193.3 
Private Equity(b)198.5 Not redeemable204.6 
2.1Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice37.8
Total Private Equity200.6242.4
Real Assets(c)171.8 Not redeemable186.6 
55.1 Quarterly / 90 days notice— 
Total Real Assets226.9 186.6 
Total Partnerships$688.6 $622.3 
December 31, 2019
Investment CategoryFair ValueRedemption Term / Redemption NoticeUnfunded Commitments
(in millions of dollars)(in millions of dollars)
Private Credit(a)$223.6 Not redeemable$152.6 
39.6 Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice0.1 
Total Private Credit263.2 152.7 
Private Equity(b)149.3 Not redeemable166.8 
Real Assets(c)173.8 Not redeemable130.6 
30.4 Quarterly / 90 days notice25.0 
Total Real Assets204.2 155.6 
Total Partnerships$616.7 $475.1 
Fair Values by Fair Value Hierarchy Input level
The following tables present information about financial instruments measured at fair value on a recurring basis by fair value level, based on the observability of the inputs used:

 September 30, 2020
 Level 1Level 2Level 3NAVTotal
(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities$— $1,249.9 $— $— $1,249.9 
States, Municipalities, and Political Subdivisions18.5 3,897.1 14.4 — 3,930.0 
Foreign Governments— 1,093.4 21.7 — 1,115.1 
Public Utilities550.0 7,104.2 361.8 — 8,016.0 
Mortgage/Asset-Backed Securities— 1,344.3 87.8 — 1,432.1 
All Other Corporate Bonds8,556.3 24,260.9 700.4 — 33,517.6 
Redeemable Preferred Stocks— 9.5 — — 9.5 
Total Fixed Maturity Securities9,124.8 38,959.3 1,186.1 — 49,270.2 
Other Long-term Investments
Derivatives
Forwards— 0.1 — — 0.1 
Foreign Exchange Contracts— 38.0 — — 38.0 
       Credit Default Swaps— 0.2 — — 0.2 
Total Derivatives— 38.3 — — 38.3 
Perpetual Preferred and Equity Securities19.3 0.2 4.6 — 24.1 
Private Equity Partnerships— — — 688.6 688.6 
Total Other Long-term Investments19.3 38.5 4.6 688.6 751.0 
Total Financial Instrument Assets Carried at Fair Value$9,144.1 $38,997.8 $1,190.7 $688.6 $50,021.2 
Liabilities
Other Liabilities
Derivatives
Foreign Exchange Contracts$— $34.0 $— $— $34.0 
Embedded Derivative in Modified Coinsurance Arrangement— — 53.7 — 53.7 
Total Derivatives— 34.0 53.7 — 87.7 
Total Financial Instrument Liabilities Carried at Fair Value$— $34.0 $53.7 $— $87.7 
 December 31, 2019
 Level 1Level 2Level 3NAVTotal
(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities$412.8 $988.9 $— $— $1,401.7 
States, Municipalities, and Political Subdivisions— 3,321.6 41.8 — 3,363.4 
Foreign Governments— 995.9 21.8 — 1,017.7 
Public Utilities171.1 7,546.5 14.6 — 7,732.2 
Mortgage/Asset-Backed Securities— 1,444.6 34.1 — 1,478.7 
All Other Corporate Bonds4,114.4 27,695.5 600.5 — 32,410.4 
Redeemable Preferred Stocks— 39.6 — — 39.6 
Total Fixed Maturity Securities4,698.3 42,032.6 712.8 — 47,443.7 
Other Long-term Investments
Derivatives
Foreign Exchange Contracts— 27.0 — — 27.0 
Credit Default Swaps— 0.5 — — 0.5 
Total Derivatives— 27.5 — — 27.5 
Perpetual Preferred and Equity Securities— 28.0 4.6 — 32.6 
Private Equity Partnerships— — — 616.7 616.7 
Total Other Long-term Investments— 55.5 4.6 616.7 676.8 
Total Financial Instrument Assets Carried at Fair Value$4,698.3 $42,088.1 $717.4 $616.7 $48,120.5 
Liabilities
Other Liabilities
Derivatives
Interest Rate Swaps$— $0.6 $— $— $0.6 
Foreign Exchange Contracts— 34.0 — — 34.0 
Embedded Derivative in Modified Coinsurance Arrangement— — 22.8 — 22.8 
Total Derivatives— 34.6 22.8 — 57.4 
Total Financial Instrument Liabilities Carried at Fair Value$— $34.6 $22.8 $— $57.4 
Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs
Changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows:

 Three Months Ended September 30, 2020
 Fair Value Beginning of PeriodTotal Realized
and Unrealized
Investment Gains (Losses) in
  Level 3 TransfersFair Value End of PeriodChange in Unrealized Gain (Loss) on Securities Held at the End of Period included in
 Earnings
OCI1
PurchasesSalesIntoOut of
OCI1
Earnings
(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions$13.8 $— $0.6 $— $— $— $— $14.4 $0.1 $— 
Foreign Governments22.0 — (0.3)— — — — 21.7 (0.2)— 
Public Utilities309.2 — 2.8 — — 128.1 (78.3)361.8 2.9 — 
Mortgage/Asset-Backed Securities174.3 — (1.0)— — — (85.5)87.8 (0.9)— 
All Other Corporate Bonds546.5 — 11.4 60.0 (1.0)208.3 (124.8)700.4 10.2 — 
Total Fixed Maturity Securities1,065.8 — 13.5 60.0 (1.0)336.4 (288.6)1,186.1 12.1 — 
Equity Securities4.5 0.1 — — — — — 4.6 — 0.1 
Embedded Derivative in Modified Coinsurance Arrangement(67.8)14.1 — — — — — (53.7)— 14.1 

1 Other Comprehensive Income (Loss)
 Three Months Ended September 30, 2019
 Fair Value Beginning of PeriodTotal Realized and Unrealized Investment Gains (Losses) in  Level 3 TransfersFair Value End of Period
 EarningsOCIPurchasesSalesIntoOut of
(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions$— $— $— $13.1 $— $— $— $13.1 
Foreign Governments31.9 — — — — — — 31.9 
Public Utilities189.1 — 3.6 — — 84.2 (180.7)96.2 
Mortgage/Asset-Backed Securities— — (0.8)— — 62.0 — 61.2 
All Other Corporate Bonds1,014.1 — 2.7 19.8 (1.4)76.5 (690.0)421.7 
Redeemable Preferred Stocks— — — — — — — — 
Total Fixed Maturity Securities1,235.1 — 5.5 32.9 (1.4)222.7 (870.7)624.1 
Equity Securities4.6 — — — — — — 4.6 
Embedded Derivative in Modified Coinsurance Arrangement(26.4)(11.1)— — — — — (37.5)
 Nine Months Ended September 30, 2020
 Fair Value Beginning of YearTotal Realized
and Unrealized
Investment Gains (Losses) in
  Level 3 TransfersFair Value End of PeriodChange in Unrealized Gain (Loss) on Securities Held at the End of Period included in
 EarningsOCIPurchasesSalesIntoOut ofOCIEarnings
(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions$41.8 $— $1.1 $— $— $— $(28.5)$14.4 $1.4 $— 
Foreign Governments21.8 — (0.1)— — — — 21.7 (0.1)— 
Public Utilities14.6 — 7.0 — — 340.2 — 361.8 7.1 — 
Mortgage/Asset-Backed Securities34.1 — (1.8)— (7.0)62.7 (0.2)87.8 (1.8)— 
All Other Corporate Bonds600.5 — 7.3 105.0 (29.1)183.0 (166.3)700.4 11.3 — 
Total Fixed Maturity Securities712.8 — 13.5 105.0 (36.1)585.9 (195.0)1,186.1 17.9 — 
Equity Securities4.6 — — — — — — 4.6 — — 
Embedded Derivative in Modified Coinsurance Arrangement(22.8)(30.9)— — — — — (53.7)— (30.9)
 Nine Months Ended September 30, 2019
 Fair Value Beginning of YearTotal Realized and Unrealized Investment Gains (Losses) in  Level 3 TransfersFair Value End of Period
 EarningsOCIPurchasesSalesIntoOut of
(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions$— $— $— $13.1 $— $— $— $13.1 
Foreign Governments31.4 — 0.5 — — — — 31.9 
Public Utilities84.7 — 0.8 — — 87.5 (76.8)96.2 
Mortgage/Asset-Backed Securities— — (1.2)— — 62.4 — 61.2 
All Other Corporate Bonds1,495.8 — 15.5 35.2 (48.6)146.5 (1,222.7)421.7 
Redeemable Preferred Stocks21.1 — — — — — (21.1)— 
Total Fixed Maturity Securities1,633.0 — 15.6 48.3 (48.6)296.4 (1,320.6)624.1 
Equity Securities4.6 — — — — — — 4.6 
Embedded Derivative in Modified Coinsurance Arrangement(31.1)(6.4)— — — — — (37.5)
Realized and unrealized investment gains and losses presented in the preceding tables represent gains and losses only for the time during which the applicable financial instruments were classified as Level 3. The transfers between levels resulted primarily from a change in observability of three inputs used to determine fair values of the securities transferred: (1) transactional data for new issuance and secondary trades, (2) broker/dealer quotes and pricing, primarily related to changes in the level of activity in the market and whether the market was considered orderly, and (3) comparable bond metrics from which to perform an analysis. For fair value measurements of financial instruments that were transferred either into or out of Level 3, we reflect the transfers using the fair value at the beginning of the period. We believe this allows for greater transparency, as all changes in fair value that arise during the reporting period of the transfer are disclosed as a component of our Level 3 reconciliation.
Quantitative Information Regarding Significant Unobservable Inputs
The table below provides quantitative information regarding the significant unobservable inputs used in Level 3 fair value measurements derived from internal models. Unobservable inputs for fixed maturity securities are weighted by the fair value of the securities. Certain securities classified as Level 3 are excluded from the table below due to limitations in our ability to obtain the underlying inputs used by external pricing sources.

September 30, 2020
Fair ValueValuation MethodUnobservable InputRange/Weighted Average
(in millions of dollars)
Fixed Maturity Securities
Public Utilities$111.6 Market Approach
Lack of Marketability
(a)
0.12% - 1.27% / 0.76%
All Other Corporate Bonds - Private45.9 Market Approach
Volatility of Credit
(b)
0.50% - 15.42% / 2.43%
Equity Securities - Private4.6 Market Approach
Market Convention
(c)Priced at Cost or Owner's Equity
Embedded Derivative in Modified Coinsurance Arrangement(53.7)Discounted Cash Flows
Projected Liability Cash Flows
Weighted Spread of Swap Curve
(d)
Actuarial Assumptions

1.3%

December 31, 2019
Fair ValueValuation MethodUnobservable InputRange/Weighted Average
(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private$119.2 Market Approach
Lack of Marketability
Volatility of Credit
Market Convention
(a)
(b)
(c)
4.56% - 4.56% / 4.56%
0.35% - 17.68% / 2.2%
Priced at Par
Equity Securities - Private4.6 Market ApproachMarket Convention(c)Priced at Cost or Owner's Equity
Embedded Derivative in Modified Coinsurance Arrangement(22.8)Discounted Cash Flows
Projected Liability Cash Flows
Weighted Spread of Swap Curve
(d)
Actuarial Assumptions

0.8%

(a)Represents basis point adjustments to apply a discount due to the illiquidity of an investment
(b)Represents basis point adjustments for credit-specific factors
(c)Represents a decision to price based on par value, cost, or owner's equity when limited data is available
(d)Represents various actuarial assumptions required to derive the liability cash flows. Fair value of embedded derivative is most often driven by the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan.
Carrying Amount and Fair Value of Financial Instruments
The following table presents the carrying amounts and estimated fair values of our financial instruments not measured at fair value and indicates the level in the fair value hierarchy of the estimated fair value measurement based on the observability of the inputs used:
September 30, 2020
Estimated Fair Value
Level 1Level 2Level 3TotalCarrying Value
(in millions of dollars)
Assets
Mortgage Loans$— $2,623.3 $— $2,623.3 $2,406.5 
Policy Loans— — 3,819.2 3,819.2 3,669.1 
Other Long-term Investments
Miscellaneous Long-term Investments— 21.7 36.6 58.3 58.3 
Total Financial Instrument Assets Not Carried at Fair Value$— $2,645.0 $3,855.8 $6,500.8 $6,133.9 
Liabilities
Long-term Debt$2,561.0 $1,203.5 $— $3,764.5 $3,378.6 
Payable for Collateral on Federal Home Loan Bank (FHLB) Funding Agreements— 30.2 — 30.2 30.2 
Other Liabilities
Unfunded Commitments— 1.8 — 1.8 1.8 
Total Financial Instrument Liabilities Not Carried at Fair Value$2,561.0 $1,235.5 $— $3,796.5 $3,410.6 
December 31, 2019
Estimated Fair Value
Level 1Level 2Level 3TotalCarrying Value
(in millions of dollars)
Assets
Mortgage Loans$— $2,556.3 $— $2,556.3 $2,397.0 
Policy Loans— — 3,911.4 3,911.4 3,779.5 
Other Long-term Investments
Miscellaneous Long-term Investments— 18.5 58.4 76.9 76.9 
Total Financial Instrument Assets Not Carried at Fair Value$— $2,574.8 $3,969.8 $6,544.6 $6,253.4 
Liabilities
Long-term Debt$1,712.8 $1,526.2 $— $3,239.0 $2,926.9 
Other Liabilities
Unfunded Commitments— 1.9 — 1.9 1.9 
Total Financial Instrument Liabilities Not Carried at Fair Value$1,712.8 $1,528.1 $— $3,240.9 $2,928.8