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Investments (Tables) | 3 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities |
March 31, 2024 | Amortized Cost |  | Valuation Allowance |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  |  |  |  |
(in millions of U.S. dollars) |  |  |  |  |  |
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 3,058 |  |  | $ | — |  |  | $ | 5 |  |  | $ | (164) |  |  | $ | 2,899 |  |  |  |  |  |
Non-U.S. | 36,962 |  |  | (41) |  |  | 605 |  |  | (1,381) |  |  | 36,145 |  |  |  |  |  |
Corporate and asset-backed securities | 45,567 |  |  | (73) |  |  | 306 |  |  | (2,353) |  |  | 43,447 |  |  |  |  |  |
Mortgage-backed securities | 25,696 |  |  | (1) |  |  | 89 |  |  | (2,029) |  |  | 23,755 |  |  |  |  |  |
Municipal | 2,196 |  |  | — |  |  | 7 |  |  | (160) |  |  | 2,043 |  |  |  |  |  |
| $ | 113,479 |  |  | $ | (115) |  |  | $ | 1,012 |  |  | $ | (6,087) |  |  | $ | 108,289 |  |  |  |  |  |
December 31, 2023 | Amortized Cost |  | Valuation Allowance |  | Gross Unrealized Appreciation |  | Gross Unrealized Depreciation |  | Fair Value |  |  |  |  |  |  |  |  |  |  |
(in millions of U.S. dollars) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury / Agency | $ | 3,721 |  |  | $ | — |  |  | $ | 13 |  |  | $ | (144) |  |  | $ | 3,590 |  |  |  |  |  |  |  |  |  |  |  |
Non-U.S. | 35,918 |  |  | (49) |  |  | 592 |  |  | (1,297) |  |  | 35,164 |  |  |  |  |  |  |  |  |  |  |  |
Corporate and asset-backed securities | 44,695 |  |  | (104) |  |  | 390 |  |  | (2,151) |  |  | 42,830 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities | 23,720 |  |  | (3) |  |  | 143 |  |  | (1,802) |  |  | 22,058 |  |  |  |  |  |  |  |  |  |  |  |
Municipal | 3,074 |  |  | — |  |  | 10 |  |  | (155) |  |  | 2,929 |  |  |  |  |  |  |  |  |  |  |  |
| $ | 111,128 |  |  | $ | (156) |  |  | $ | 1,148 |  |  | $ | (5,549) |  |  | $ | 106,571 |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Fixed Maturities By Contractual Maturity | The following table presents fixed maturities by contractual maturity:
| March 31, 2024 |  | December 31, 2023
(in millions of U.S. dollars) | Net Carrying Value |  | Fair Value |  | Net Carrying Value |  | Fair Value
Available-for-sale |  |  |  |  |  |  |
Due in 1 year or less | $ | 4,521 |  |  | $ | 4,521 |  |  | $ | 4,729 |  |  | $ | 4,729 |
Due after 1 year through 5 years | 33,533 |  |  | 33,533 |  |  | 33,573 |  |  | 33,573 |
Due after 5 years through 10 years | 28,198 |  |  | 28,198 |  |  | 28,480 |  |  | 28,480 |
Due after 10 years | 18,282 |  |  | 18,282 |  |  | 17,731 |  |  | 17,731 |
| 84,534 |  |  | 84,534 |  |  | 84,513 |  |  | 84,513 |
Mortgage-backed securities | 23,755 |  |  | 23,755 |  |  | 22,058 |  |  | 22,058 |
| $ | 108,289 |  |  | $ | 108,289 |  |  | $ | 106,571 |  |  | $ | 106,571 |
Schedule Of Aggregate Fair Value And Gross Unrealized Loss By Length Of Time The Security Has Continuously Been In An Unrealized Loss Position | The following tables present, for available-for-sale (AFS) fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have expected credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
| 0 – 12 Months |  | Over 12 Months |  | Total
March 31, 2024 | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
(in millions of U.S. dollars) |  |  |  |  |
U.S. Treasury / Agency | $ | 632 |  |  | $ | (13) |  |  | $ | 2,007 |  |  | $ | (151) |  |  | $ | 2,639 |  |  | $ | (164) |
Non-U.S. | 3,793 |  |  | (64) |  |  | 15,928 |  |  | (1,079) |  |  | 19,721 |  |  | (1,143) |
Corporate and asset-backed securities | 4,675 |  |  | (71) |  |  | 19,646 |  |  | (1,487) |  |  | 24,321 |  |  | (1,558) |
Mortgage-backed securities | 4,907 |  |  | (82) |  |  | 13,783 |  |  | (1,919) |  |  | 18,690 |  |  | (2,001) |
Municipal | 443 |  |  | (12) |  |  | 1,218 |  |  | (148) |  |  | 1,661 |  |  | (160) |
Total AFS fixed maturities | $ | 14,450 |  |  | $ | (242) |  |  | $ | 52,582 |  |  | $ | (4,784) |  |  | $ | 67,032 |  |  | $ | (5,026) |
| 0 – 12 Months |  | Over 12 Months |  | Total
December 31, 2023 | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss |  | Fair Value |  | Gross Unrealized Loss
(in millions of U.S. dollars) |  |  |  |  |
U.S. Treasury / Agency | $ | 463 |  |  | $ | (9) |  |  | $ | 2,504 |  |  | $ | (135) |  |  | $ | 2,967 |  |  | $ | (144) |
Non-U.S. | 2,464 |  |  | (43) |  |  | 15,971 |  |  | (957) |  |  | 18,435 |  |  | (1,000) |
Corporate and asset-backed securities | 2,866 |  |  | (51) |  |  | 20,334 |  |  | (1,194) |  |  | 23,200 |  |  | (1,245) |
Mortgage-backed securities | 1,659 |  |  | (58) |  |  | 13,831 |  |  | (1,706) |  |  | 15,490 |  |  | (1,764) |
Municipal | 1,117 |  |  | (15) |  |  | 1,310 |  |  | (137) |  |  | 2,427 |  |  | (152) |
Total AFS fixed maturities | $ | 8,569 |  |  | $ | (176) |  |  | $ | 53,950 |  |  | $ | (4,129) |  |  | $ | 62,519 |  |  | $ | (4,305) |
Debt Securities, Available-for-sale, Allowance for Credit Loss | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
| Three Months Ended |  |
| March 31 |  |
(in millions of U.S. dollars) | 2024 |  | 2023 |  |  |  |
Available-for-sale |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 156 |  |  | $ | 169 |  |  |  |  |
Provision for expected credit loss | 31 |  |  | 59 |  |  |  |  |
Write-offs charged against the expected credit loss | (5) |  |  | (2) |  |  |  |  |
Recovery of expected credit loss | (67) |  |  | (58) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 115 |  |  | $ | 168 |  |  |  |  |
Held-to-maturity |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | — |  |  | $ | 34 |  |  |  |  |
Recovery of expected credit loss | — |  |  | (1) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | — |  |  | $ | 33 |  |  |  |  |
Private debt held-for-investment |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 4 |  |  | $ | — |  |  |  |  |
Provision for expected credit loss | 1 |  |  | — |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 5 |  |  | $ | — |  |  |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
| Three Months Ended |  |
| March 31 |  |
(in millions of U.S. dollars) | 2024 |  | 2023 |  |  |  |
Available-for-sale |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 156 |  |  | $ | 169 |  |  |  |  |
Provision for expected credit loss | 31 |  |  | 59 |  |  |  |  |
Write-offs charged against the expected credit loss | (5) |  |  | (2) |  |  |  |  |
Recovery of expected credit loss | (67) |  |  | (58) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 115 |  |  | $ | 168 |  |  |  |  |
Held-to-maturity |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | — |  |  | $ | 34 |  |  |  |  |
Recovery of expected credit loss | — |  |  | (1) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | — |  |  | $ | 33 |  |  |  |  |
Private debt held-for-investment |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 4 |  |  | $ | — |  |  |  |  |
Provision for expected credit loss | 1 |  |  | — |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 5 |  |  | $ | — |  |  |  |  |
Private debt held-for-investment, allowance for credit loss | The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
| Three Months Ended |  |
| March 31 |  |
(in millions of U.S. dollars) | 2024 |  | 2023 |  |  |  |
Available-for-sale |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 156 |  |  | $ | 169 |  |  |  |  |
Provision for expected credit loss | 31 |  |  | 59 |  |  |  |  |
Write-offs charged against the expected credit loss | (5) |  |  | (2) |  |  |  |  |
Recovery of expected credit loss | (67) |  |  | (58) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 115 |  |  | $ | 168 |  |  |  |  |
Held-to-maturity |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | — |  |  | $ | 34 |  |  |  |  |
Recovery of expected credit loss | — |  |  | (1) |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | — |  |  | $ | 33 |  |  |  |  |
Private debt held-for-investment |  |  |  |  |  |  |
Valuation allowance for expected credit losses - beginning of period | $ | 4 |  |  | $ | — |  |  |  |  |
Provision for expected credit loss | 1 |  |  | — |  |  |  |  |
Valuation allowance for expected credit losses - end of period | $ | 5 |  |  | $ | — |  |  |  |  |
Schedule of Realized Gain (Loss) | The following table presents the components of net realized gains (losses):
| Three Months Ended |  |
| March 31 |  |
(in millions of U.S. dollars) | 2024 |  | 2023 |  |  |  |
Fixed maturities: |  |  |  |  |  |  |
Gross realized gains | $ | 16 |  |  | $ | 2 |  |  |  |  |
Gross realized losses | (141) |  |  | (159) |  |  |  |  |
Other investments - Fixed maturities | 168 |  |  | — |  |  |  |  |
Net (provision for) recovery of expected credit losses | 40 |  |  | 2 |  |  |  |  |
Impairment (1) | (34) |  |  | (25) |  |  |  |  |
Total fixed maturities | 49 |  |  | (180) |  |  |  |  |
Equity securities | 3 |  |  | 11 |  |  |  |  |
Private equities (less than 3 percent ownership) | 31 |  |  | 15 |  |  |  |  |
Foreign exchange | (131) |  |  | 131 |  |  |  |  |
Investment and embedded derivative instruments | (43) |  |  | (46) |  |  |  |  |
Other derivative instruments | (2) |  |  | (1) |  |  |  |  |
Other | (8) |  |  | (7) |  |  |  |  |
Net realized gains (losses) (pre-tax) | $ | (101) |  |  | $ | (77) |  |  |  |  |
(1)Relates to certain securities we intended to sell and securities written to market entering default.
Gain (Loss) on Securities | Realized gains and losses from Other investments, Equity securities and Private equities from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:
|  |  |  |  | Three Months Ended
|  |  |  |  | March 31
| 2024 |  | 2023
(in millions of U.S. dollars) | Equity Securities |  | Other Investments |  | Private Equities |  | Total |  | Equity Securities |  | Private Equities |  | Total
Net gains (losses) recognized during the period | $ | 3 |  |  | $ | 168 |  |  | $ | 31 |  |  | $ | 202 |  |  | $ | 11 |  |  | $ | 15 |  |  | $ | 26 |
Less: Net gains (losses) recognized from sales of securities | (3) |  |  | — |  |  | — |  |  | (3) |  |  | (5) |  |  | — |  |  | (5) |
Unrealized gains (losses) recognized for securities still held at reporting date | $ | 6 |  |  | $ | 168 |  |  | $ | 31 |  |  | $ | 205 |  |  | $ | 16 |  |  | $ | 15 |  |  | $ | 31 |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share |
| Expected Liquidation Period of Underlying Assets |  | March 31, 2024 |  | December 31, 2023
(in millions of U.S. dollars) | Fair Value |  | Maximum Future Funding Commitments |  | Fair Value |  | Maximum Future Funding Commitments
Financial | 2 to 10 Years |  | $ | 1,289 |  |  | $ | 341 |  |  | $ | 1,241 |  |  | $ | 364 |
Real assets | 2 to 13 Years |  | 2,095 |  |  | 424 |  |  | 2,137 |  |  | 445 |
Distressed | 2 to 8 Years |  | 1,218 |  |  | 928 |  |  | 1,206 |  |  | 936 |
Private credit | 3 to 8 Years |  | 328 |  |  | 296 |  |  | 331 |  |  | 298 |
Traditional | 2 to 14 Years |  | 9,052 |  |  | 3,916 |  |  | 8,873 |  |  | 4,167 |
Vintage | 1 to 3 Years |  | 67 |  |  | — |  |  | 72 |  |  | — |
Investment funds | Not Applicable |  | 232 |  |  | — |  |  | 218 |  |  | — |
|  |  | $ | 14,281 |  |  | $ | 5,905 |  |  | $ | 14,078 |  |  | $ | 6,210 |
Schedule Of Components Of Restricted Assets | The following table presents the components of restricted assets:
| March 31 |  | December 31
(in millions of U.S. dollars) | 2024 |  | 2023
Trust funds | $ | 8,626 |  |  | $ | 8,482 |
Deposits with U.S. regulatory authorities | 2,488 |  |  | 2,544 |
Deposits with non-U.S. regulatory authorities | 3,595 |  |  | 3,584 |
Assets pledged under repurchase agreements | 3,097 |  |  | 2,924 |
Other pledged assets | 905 |  |  | 880 |
Total | $ | 18,711 |  |  | $ | 18,414 |

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