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Schedule I. Summary of Investments Other Than Investments in Related Parties (Details) $ in Thousands | Dec. 31, 2023 USD ($)
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SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | $ 29,216,143
Amount at Which Shown in the Balance Sheet | 29,216,143
Fixed maturity investments trading |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 20,872,450
Fair Value | 20,877,108
Amount at Which Shown in the Balance Sheet | 20,877,108
U.S. treasuries |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 9,993,460
Fair Value | 10,060,203
Amount at Which Shown in the Balance Sheet | 10,060,203
Corporate |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 6,540,091
Fair Value | 6,499,075
Amount at Which Shown in the Balance Sheet | 6,499,075
Asset-backed |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 1,490,641
Fair Value | 1,491,695
Amount at Which Shown in the Balance Sheet | 1,491,695
Residential mortgage-backed |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 1,421,470
Fair Value | 1,420,362
Amount at Which Shown in the Balance Sheet | 1,420,362
Agencies |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 499,084
Fair Value | 489,117
Amount at Which Shown in the Balance Sheet | 489,117
Non-U.S. government |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 484,654
Fair Value | 483,576
Amount at Which Shown in the Balance Sheet | 483,576
Commercial mortgage-backed |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 443,050
Fair Value | 433,080
Amount at Which Shown in the Balance Sheet | 433,080
Short term investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost or Cost | 4,603,340
Fair Value | 4,604,079
Amount at Which Shown in the Balance Sheet | 4,604,079
Equity investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 106,766
Amount at Which Shown in the Balance Sheet | 106,766
Total other investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 3,515,566
Amount at Which Shown in the Balance Sheet | 3,515,566
Catastrophe bonds |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 1,942,199
Amount at Which Shown in the Balance Sheet | 1,942,199
Fund investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 1,415,804
Amount at Which Shown in the Balance Sheet | 1,415,804
Term loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 97,658
Amount at Which Shown in the Balance Sheet | 97,658
Direct private equity investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 59,905
Amount at Which Shown in the Balance Sheet | 59,905
Investments in other ventures, under equity method |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair Value | 112,624
Amount at Which Shown in the Balance Sheet | $ 112,624

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