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Regulation and Equity - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2025
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus	$ 33	$ 34
Combined statutory unearned premium reserve required	1,608
Net assets restricted from dividend payments without prior approval	1,141
Statutory capital and surplus	1,223	1,225
Statutory net income	587	503	$ 778
Minimum net worth required for compliance	1
Corbeau Re (VT)
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus	1,230	765
Non-permitted statutory accounting practices deficit	(1,052)	(594)
F&G Cayman Re Ltd
Statutory Accounting Practices [Line Items]
Permitted practice, statutory surplus	(64)	102
Iowa
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus	454	194
Iowa | F&G
Statutory Accounting Practices [Line Items]
Statutory Capital and Surplus:	1,654	2,009
New York | F&G
Statutory Accounting Practices [Line Items]
Statutory Capital and Surplus:	97	86
Vermont | Corbeau Re (VT) | F&G
Statutory Accounting Practices [Line Items]
Statutory Capital and Surplus:	178	171
Vermont | Raven Re (VT) | F&G
Statutory Accounting Practices [Line Items]
Statutory Capital and Surplus:	168	140
Vermont | Raven Re (VT)
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus	175	200
Statutory capital and surplus	168	140
Non-permitted statutory accounting practices deficit	$ (13)	$ (89)
Forecast
Statutory Accounting Practices [Line Items]
Statutory amount available for distributions without prior approval				$ 498
Forecast | Iowa
Statutory Accounting Practices [Line Items]
Statutory account practices, amount available for dividend (maximum)				0
Forecast | New York
Statutory Accounting Practices [Line Items]
Statutory account practices, amount available for dividend (maximum)				$ 10

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Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

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The amount of retained earnings as of the balance sheet date that cannot be distributed to stockholders pursuant to statutory rules and regulations.

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