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Investment Information (Tables)
6 Months Ended
Jun. 30, 2022
Disclosure Investment Information [Abstract]  
Summary of fair value and cost or amortized cost of available for sale securities
The following table summarizes the fair value and cost or amortized cost of the Company’s securities classified as available for sale:
Estimated
Fair
Value
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Allowance for Expected Credit Losses Cost or
Amortized
Cost
June 30, 2022
Fixed maturities:
Corporate bonds$7,288,555 $32,021 $(655,664)$(38,494)$7,950,692 
Mortgage backed securities698,168 4,427 (55,898)— 749,639 
Municipal bonds417,380 4,129 (18,936)(298)432,485 
Commercial mortgage backed securities1,023,088 1,533 (42,056)(3,594)1,067,205 
U.S. government and government agencies4,368,150 25,112 (240,786)— 4,583,824 
Non-U.S. government securities2,181,943 16,175 (163,724)(1,335)2,330,827 
Asset backed securities1,607,745 1,001 (80,267)(14,689)1,701,700 
Total17,585,029 84,398 (1,257,331)(58,410)18,816,372 
Short-term investments2,227,874 2,458 (1,257)— 2,226,673 
Total$19,812,903 $86,856 $(1,258,588)$(58,410)$21,043,045 
December 31, 2021
Fixed maturities:
Corporate bonds$6,553,333 $104,170 $(69,194)$(2,037)$6,520,394 
Mortgage backed securities408,477 2,825 (5,410)(48)411,110 
Municipal bonds404,666 18,724 (1,409)(2)387,353 
Commercial mortgage backed securities1,046,484 1,740 (3,117)(6)1,047,867 
U.S. government and government agencies4,772,764 10,076 (45,967)— 4,808,655 
Non-U.S. government securities2,120,294 54,048 (34,749)(82)2,101,077 
Asset backed securities2,692,091 6,540 (11,108)(708)2,697,367 
Total17,998,109 198,123 (170,954)(2,883)17,973,823 
Short-term investments1,734,716 568 (590)— 1,734,738 
Total$19,732,825 $198,691 $(171,544)$(2,883)$19,708,561 
Summary of available for sale securities in a continual unrealized loss position
The following table summarizes, for all available for sale securities in an unrealized loss position, the fair value and gross unrealized loss by length of time the security has been in a continual unrealized loss position:
 Less than 12 Months12 Months or MoreTotal
Estimated
Fair
Value
Gross
Unrealized
Losses
Estimated
Fair
Value
Gross
Unrealized
Losses
Estimated
Fair
Value
Gross
Unrealized
Losses
June 30, 2022
Fixed maturities:
Corporate bonds$6,583,215 $(580,235)$489,098 $(75,429)$7,072,313 $(655,664)
Mortgage backed securities595,485 (46,415)61,751 (9,483)657,236 (55,898)
Municipal bonds271,481 (17,908)8,876 (1,028)280,357 (18,936)
Commercial mortgage backed securities973,212 (42,056)— — 973,212 (42,056)
U.S. government and government agencies4,029,550 (235,510)69,596 (5,276)4,099,146 (240,786)
Non-U.S. government securities1,929,278 (148,781)103,969 (14,943)2,033,247 (163,724)
Asset backed securities1,292,087 (73,575)136,119 (6,692)1,428,206 (80,267)
Total15,674,308 (1,144,480)869,409 (112,851)16,543,717 (1,257,331)
Short-term investments505,798 (1,257)— — 505,798 (1,257)
Total$16,180,106 $(1,145,737)$869,409 $(112,851)$17,049,515 $(1,258,588)
December 31, 2021
Fixed maturities:
Corporate bonds$3,639,582 $(63,938)$98,867 $(5,256)$3,738,449 $(69,194)
Mortgage backed securities222,176 (3,545)46,809 (1,865)268,985 (5,410)
Municipal bonds26,665 (385)16,361 (1,024)43,026 (1,409)
Commercial mortgage backed securities675,603 (2,805)5,908 (312)681,511 (3,117)
U.S. government and government agencies4,211,621 (44,180)33,373 (1,787)4,244,994 (45,967)
Non-U.S. government securities1,511,301 (31,983)62,957 (2,766)1,574,258 (34,749)
Asset backed securities1,667,002 (9,853)33,082 (1,255)1,700,084 (11,108)
Total11,953,950 (156,689)297,357 (14,265)12,251,307 (170,954)
Short-term investments284,733 (590)— — 284,733 (590)
Total$12,238,683 $(157,279)$297,357 $(14,265)$12,536,040 $(171,544)
Contractual maturities of the Company's fixed maturities
The contractual maturities of the Company’s fixed maturities are shown in the following table. Expected maturities, which are management’s best estimates, will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
June 30, 2022December 31, 2021
MaturityEstimated
Fair
Value
Amortized
Cost
Estimated
Fair
Value
Amortized
Cost
Due in one year or less$412,194 $414,752 $300,889 $299,772 
Due after one year through five years9,423,547 9,927,876 8,355,255 8,339,387 
Due after five years through 10 years4,070,099 4,512,685 4,689,155 4,684,393 
Due after 10 years350,188 442,515 505,758 493,927 
 14,256,028 15,297,828 13,851,057 13,817,479 
Mortgage backed securities698,168 749,639 408,477 411,110 
Commercial mortgage backed securities1,023,088 1,067,205 1,046,484 1,047,867 
Asset backed securities1,607,745 1,701,700 2,692,091 2,697,367 
Total$17,585,029 $18,816,372 $17,998,109 $17,973,823 
Summary of other investments and other investable assets
The following table summarizes the Company’s other investments and other investable assets:
June 30,
2022
December 31,
2021
Fixed maturities$525,451 $416,698 
Other investments1,054,771 1,432,553 
Short-term investments39,657 97,806 
Equity securities14,489 26,493 
Total$1,634,368 $1,973,550 
The following table summarizes the Company’s other investments, as detailed in the previous table, by strategy:
June 30,
2022
December 31,
2021
Lending$427,812 $536,345 
Investment grade fixed income221,484 147,810 
Term loan investments152,277 484,950 
Private equity124,282 91,126 
Energy74,234 81,692 
Credit related funds54,682 70,278 
Infrastructure— 20,352 
Total$1,054,771 $1,432,553 
Summary of investments accounted for using equity method
The following table summarizes the Company’s investments accounted for using the equity method, by strategy:
June 30,
2022
December 31,
2021
Credit related funds$1,119,711 $1,022,334 
Private equity646,904 436,042 
Real estate455,044 396,395 
Lending447,028 376,649 
Equities350,587 395,090 
Infrastructure231,816 230,070 
Energy115,514 119,141 
Fixed income129,737 101,890 
Total$3,496,341 $3,077,611 
Summary of investments in limited partnership interests where the Company has a variable interest
The following table summarizes investments in limited partnership interests where the Company has a variable interest by balance sheet line item:
June 30,
2022
December 31,
2021
Investments accounted for using the equity method (1)3,496,341 3,077,611 
Investments accounted for using the fair value option (2)128,826 170,595 
Total$3,625,167 $3,248,206 
(1)    Aggregate unfunded commitments were $3.0 billion at June 30, 2022, compared to $2.6 billion at December 31, 2021.
(2)    Aggregate unfunded commitments were $21.7 million at June 30, 2022, compared to $18.8 million at December 31, 2021.
Components of net investment income
The components of net investment income were derived from the following sources:
June 30,
 20222021
Three Months Ended
Fixed maturities$105,342 $88,625 
Term loans401 16,879 
Equity securities6,121 8,584 
Short-term investments4,120 1,138 
Other (1)7,583 19,950 
Gross investment income123,567 135,176 
Investment expenses(17,175)(23,563)
Net investment income$106,392 $111,613 
Six Months Ended
Fixed maturities$187,395 $179,251 
Term loans2,018 31,607 
Equity securities12,359 14,234 
Short-term investments6,695 1,745 
Other (1)18,042 34,305 
Gross investment income226,509 261,142 
Investment expenses(39,681)(50,673)
Net investment income$186,828 $210,469 
(1)    Includes income distributions from investment funds and other items.
Summary of net realized gains (losses), including change in allowance for credit losses on financial assets and net impairment losses recognized in earnings
Net realized gains (losses), which include changes in the allowance for credit losses on financial assets and net impairment losses recognized in earnings were as follows:
June 30,
 20222021
Three Months Ended
Available for sale securities:  
Gross gains on investment sales$15,186 $115,541 
Gross losses on investment sales(57,176)(50,627)
Change in fair value of assets and liabilities accounted for using the fair value option:
Fixed maturities(39,255)10,912 
Other investments(21,710)60,884 
Equity securities(2,124)5,492 
Short-term investments(2,008)(104)
Equity securities, at fair value:
Net realized gains (losses) on sales during the period16,879 33,570 
Net unrealized gains (losses) on equity securities still held at reporting date(106,375)65,847 
Allowance for credit losses:
Investments related(25,026)896 
Underwriting related842 1,381 
Derivative instruments (1)(45,684)(51,109)
Other(128)10,224 
Net realized gains (losses)$(266,579)$202,907 
Six Months Ended
Available for sale securities:
Gross gains on investment sales$34,893 $180,543 
Gross losses on investment sales(165,523)(113,625)
Change in fair value of assets and liabilities accounted for using the fair value option:
Fixed maturities(69,844)27,465 
Other investments(17,321)107,739 
Equity securities(5,437)7,557 
Short-term investments(2,157)632 
Equity securities, at fair value:
Net realized gains (losses) on sales during the period82,090 71,419 
Net unrealized gains (losses) on equity securities still held at reporting date(282,570)85,555 
Allowance for credit losses:
Investments related(56,748)(752)
Underwriting related(3,444)6,649 
Derivative instruments (1)(69,395)(14,993)
Other(3,537)(12,821)
Net realized gains (losses)$(558,993)$345,368 
(1)    See note 9 for information on the Company’s derivative instruments.
Rollforward of the allowance for expected credit losses of securities classified as available for sale
The following table provides a roll forward of the allowance for expected credit losses of the Company’s securities classified as available for sale:
Structured Securities (1)Municipal
Bonds
Corporate
Bonds
Total
Three Months Ended June 30, 2022
Balance at beginning of period$6,998 $106 $27,041 $34,145 
Additions for current-period provision for expected credit losses4,788 252 13,466 18,506 
Additions (reductions) for previously recognized expected credit losses 6,705 (60)(205)6,440 
Reductions due to disposals(208)— (473)(681)
Balance at end of period$18,283 $298 $39,829 $58,410 
Three Months Ended June 30, 2021
Balance at beginning of period$1,207 $$2,621 $3,830 
Additions for current-period provision for expected credit losses52 — 59 
Additions (reductions) for previously recognized expected credit losses (383)(412)(791)
Reductions due to disposals(117)— (857)(974)
Balance at end of period$759 $$1,359 $2,124 
Six Months Ended June 30, 2022
Balance at beginning of period$802 $$2,079 $2,883 
Additions for current-period provision for expected credit losses10,778 347 38,616 49,741 
Additions (reductions) for previously recognized expected credit losses 7,192 (51)(220)6,921 
Reductions due to disposals(489)— (646)(1,135)
Balance at end of period$18,283 $298 $39,829 $58,410 
Six Months Ended June 30, 2021
Balance at beginning of period$1,490 $11 $896 $2,397 
Additions for current-period provision for expected credit losses234 — 2,428 2,662 
Additions (reductions) for previously recognized expected credit losses(765)(5)(952)(1,722)
Reductions due to disposals(200)— (1,013)(1,213)
Balance at end of period$759 $$1,359 $2,124 
(1)    Includes asset backed securities, mortgage backed securities and commercial mortgage backed securities.
Summary of restricted assets
The following table details the value of the Company’s restricted assets:
June 30,
2022
December 31,
2021
Assets used for collateral or guarantees:  
Affiliated transactions$4,193,561 $4,223,955 
Third party agreements2,953,800 2,721,160 
Deposits with U.S. regulatory authorities781,024 798,100 
Deposits with non-U.S. regulatory authorities485,341 506,517 
Total restricted assets$8,413,726 $8,249,732 
Reconciliation of cash and restricted cash
The following table details reconciliation of cash and restricted cash within the Consolidated Balance Sheets:
June 30,
2022
December 31,
2021
Cash$813,548 $858,668 
Restricted cash (included in ‘other assets’)$414,683 $456,103 
Cash and restricted cash$1,228,231 $1,314,771