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Insurance Company Subsidiary Operations (Tables) | 6 Months Ended
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Jun. 30, 2025
Reinsurance Disclosures [Abstract] |
Effects of Reinsurance on Premiums Written and Earned |
|  | Six months ended June 30, 2025 |
(in millions) |  | Written |  |  | Earned |
Direct premiums - WNFIC |  | $ | 516 |  |  | $ | 507 |
Ceded premiums - WNFIC |  |  | (516 | ) |  |  | (507 | )
Net premiums - WNFIC |  |  | — |  |  |  | — |
Assumed premiums - Quota share captive and excess of loss layer captive |  |  | 114 |  |  |  | 70 |
Ceded premiums - Quota share captive |  |  | (34 | ) |  |  | (34 | )
Net premiums - Quota share captive and excess of loss layer captive |  |  | 80 |  |  |  | 36 |
Net premiums - Total |  | $ | 80 |  |  | $ | 36 |

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- Definition Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479838/944-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479032/944-605-50-1 + Details
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