F&G Insurance Subsidiary Financial Information and Regulatory Matters - Schedule of Statutory Accounting Practices Disclosure (Details) - F&G - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
IOWA
Statutory Accounting Practices
Statutory Net income (loss)	$ (14)	$ (127)
Statutory Capital and Surplus	1,551		$ 1,735
New York
Statutory Accounting Practices
Statutory Net income (loss)	3	4
Statutory Capital and Surplus	125		122
Vermont \| Raven Re (VT)
Statutory Accounting Practices
Statutory Net income (loss)	8	10
Statutory Capital and Surplus	190		182
Vermont \| Corbeau Re (VT)
Statutory Accounting Practices
Statutory Net income (loss)	(40)	(52)
Statutory Capital and Surplus	228		236
Cayman Islands
Statutory Accounting Practices
Statutory Net income (loss)	(9)	$ 15
Statutory Capital and Surplus	$ 1,145		$ 1,134

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 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-5

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-3

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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