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Derivative Financial Instruments - Credit Derivatives Sold (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
Credit derivatives sold disclosures |  |
Notional amount | $ 733.3 | $ 470.0
Fair value | (12.4) | 17.4
Maximum future payments | $ 733.3 | $ 470.0
Weighted average expected life | 15 years 8 months 12 days | 15 years 10 months 24 days
Single name credit default swaps |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 233.3 | $ 220.0
Fair value | 2.7 | 3.9
Maximum future payments | $ 233.3 | $ 220.0
Weighted average expected life | 3 years 1 month 6 days | 1 year 8 months 12 days
Single name credit default swaps | Corporate debt securities | AA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 56.7 |
Fair value | 0.2 |
Maximum future payments | $ 56.7 |
Weighted average expected life | 4 years 6 months |
Single name credit default swaps | Corporate debt securities | A |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 46.6 | $ 40.0
Fair value | (0.4) | 0.2
Maximum future payments | $ 46.6 | $ 40.0
Weighted average expected life | 4 years 6 months | 6 months
Single name credit default swaps | Corporate debt securities | BBB |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 130.0 | $ 160.0
Fair value | 2.9 | 3.6
Maximum future payments | $ 130.0 | $ 160.0
Weighted average expected life | 2 years | 2 years 1 month 6 days
Single name credit default swaps | Sovereign | A |  |
Credit derivatives sold disclosures |  |
Notional amount |  | $ 20.0
Fair value |  | 0.1
Maximum future payments |  | $ 20.0
Weighted average expected life |  | 6 months
Single name total return swaps |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 500.0 | $ 250.0
Fair value | (15.1) | 13.5
Maximum future payments | $ 500.0 | $ 250.0
Weighted average expected life | 21 years 7 months 6 days | 28 years 6 months
Single name total return swaps | Government/municipalities | AAA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 40.0 | $ 40.0
Fair value | (2.6) | 2.3
Maximum future payments | $ 40.0 | $ 40.0
Weighted average expected life | 30 years 1 month 6 days | 30 years 7 months 6 days
Single name total return swaps | Government/municipalities | AA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 195.0 | $ 130.0
Fair value | (6.3) | 6.4
Maximum future payments | $ 195.0 | $ 130.0
Weighted average expected life | 21 years | 26 years 6 months
Single name total return swaps | Government/municipalities | A |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 210.0 | $ 80.0
Fair value | (4.8) | 4.8
Maximum future payments | $ 210.0 | $ 80.0
Weighted average expected life | 22 years 1 month 6 days | 30 years 8 months 12 days
Single name total return swaps | Government/municipalities | BBB |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 55.0 |
Fair value | (1.4) |
Maximum future payments | $ 55.0 |
Weighted average expected life | 15 years 9 months 18 days |

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- Definition Discloses the notional amount of the credit derivatives sold (or each group of similar credit derivatives) as of the date of the statement of financial position. + References No definition available. + Details
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- Definition Discloses the fair value of the credit derivatives sold (or each group of similar credit derivatives) as of the date of the statement of financial position. + References No definition available. + Details
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- Definition Represents the weighted-average expected life in years for credit derivatives sold. + References No definition available. + Details
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- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4K -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K + Details
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