Insurance Subsidiary Financial Information and Regulatory Matters - Statutory Accounting Practices Disclosure (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
IOWA
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 1,777		$ 1,777		$ 2,009
IOWA | F&G Segment
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	77	$ (37)	77	$ (40)
New York
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	93		93		86
New York | F&G Segment
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	4	4	6	5
Vermont | Raven Reinsurance Company
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	143		143		140
Vermont | Raven Reinsurance Company | F&G Segment
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	13	14	28	28
Vermont | Corbeau Re
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	88		88		171
Vermont | Corbeau Re | F&G Segment
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	(265)	0	(399)	0
Cayman Islands
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	1	3	(16)	7
Statutory capital and surplus	631		631		543
Bermuda
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	30	$ 5	79	$ 74
Statutory capital and surplus	$ 92		$ 92		$ 11