Business and Basis of Presentation (Details)	9 Months Ended
Sep. 30, 2026 company	Jan. 21, 2026 business
Long-Lived Assets Held-for-sale [Line Items]
Number of businesses reinsured \| business		2
Number of holding companies with outstanding public debt \| company	2
Assured Life Re Acquisition
Long-Lived Assets Held-for-sale [Line Items]
Voting equity interest acquired, percentage		100.00%
Sound Point Capital Management, LP
Long-Lived Assets Held-for-sale [Line Items]
Ownership interest	0.30

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-3

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration