F&G Insurance Subsidiary Financial Information and Regulatory Matters - Schedule of Statutory Accounting Practices Disclosure (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
IOWA
Statutory Accounting Practices
Statutory Capital and Surplus:	$ 1,229		$ 1,229		$ 1,654
IOWA \| F&G
Statutory Accounting Practices
Statutory Net income (loss):	(13)	$ (6)	(216)	$ 71
New York
Statutory Accounting Practices
Statutory Capital and Surplus:	102		102		97
New York \| F&G
Statutory Accounting Practices
Statutory Net income (loss):	1	1	7	7
Vermont \| Raven Re (VT)
Statutory Accounting Practices
Statutory Capital and Surplus:	172		172		168
Vermont \| Raven Re (VT) \| F&G
Statutory Accounting Practices
Statutory Net income (loss):	8	13	28	41
Vermont \| Corbeau Re (VT)
Statutory Accounting Practices
Statutory Capital and Surplus:	207		207		178
Vermont \| Corbeau Re (VT) \| F&G
Statutory Accounting Practices
Statutory Net income (loss):	(70)	5	(168)	(394)
Cayman Islands
Statutory Accounting Practices
Statutory Net income (loss):	(19)	(11)	0	(27)
Statutory Capital and Surplus:	1,096		1,096		734
Bermuda
Statutory Accounting Practices
Statutory Net income (loss):	46	$ 102	95	$ 181
Statutory Capital and Surplus:	$ 218		$ 218		$ 123