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Notes Payable - Narrative (Details) - USD ($)										3 Months Ended
	Feb. 01, 2025	Oct. 04, 2024	Jun. 04, 2024	Feb. 21, 2023	Nov. 22, 2022	Sep. 17, 2021	Sep. 15, 2020	Jun. 12, 2020	Apr. 20, 2018	Mar. 31, 2025	Mar. 31, 2024	Jan. 13, 2025	Dec. 31, 2024	Feb. 16, 2024	Dec. 06, 2023	Jan. 13, 2023	Apr. 22, 2020	Aug. 13, 2018
Debt Instrument [Line Items]
Debt service payments										$ 300,000,000	$ 0
Outstanding principal										$ 4,452,000,000
7.30% F&G Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										7.30%		7.30%
Aggregate principal amount												$ 375,000,000
6.25% F&G Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		6.25%								6.25%
Aggregate principal amount		$ 500,000,000
Price as percent of par on offering of unsecured notes		99.36%
Debt issuance costs, net		$ 8,000,000
Credit Agreement November 2022 | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Repayment of remaining outstanding principal		$ 365,000,000
Credit Agreement November 2022 | Line of Credit | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Facility fee, rate					0.20%
Credit Agreement November 2022 | Line of Credit | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Facility fee, rate					0.45%
6.50% F&G Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			6.50%							6.50%
Aggregate principal amount			$ 550,000,000
Price as percent of par on offering of unsecured notes			99.74%
Debt issuance costs, net			$ 6,000,000
5.50% F&G Senior Notes due May 2025 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	5.50%		5.50%						5.50%	5.50%
Aggregate principal amount									$ 550,000,000
Price as percent of par on offering of unsecured notes									99.50%
Debt service payments			$ 250,000,000
Proceeds from issuance of senior notes									$ 547,000,000
Debt instrument, unamortized premium									$ 39,000,000
Debt instrument, repurchased face amount	$ 300,000,000
Interest rate, stated percentage	100.00%
7.95% F&G Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										7.95%					7.95%
Aggregate principal amount															$ 345,000,000
Debt issuance costs, net															$ 9,000,000
7.40% F&G Senior Notes | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										7.40%						7.40%
Aggregate principal amount																$ 500,000,000
Debt issuance costs, net																$ 6,000,000
F&G Credit Agreement | Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					1.00%
F&G Credit Agreement | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility				$ 665,000,000	$ 550,000,000									$ 750,000,000
Credit facility increase in borrowing capacity				$ 115,000,000
Remaining borrowing capacity													$ 750,000,000
F&G Credit Agreement | Line of Credit | Revolving Credit Facility | Debt Terms, Condition One | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					0.30%
F&G Credit Agreement | Line of Credit | Revolving Credit Facility | Debt Terms, Condition One | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					0.80%
F&G Credit Agreement | Line of Credit | Revolving Credit Facility | Debt Terms Condition Two | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					1.30%
F&G Credit Agreement | Line of Credit | Revolving Credit Facility | Debt Terms Condition Two | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					1.80%
3.20% Notes, net of discount
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage						3.20%
Aggregate principal amount						$ 450,000,000
Proceeds from issuance debt						$ 443,000,000
3.20% Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										3.20%
Revolving Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt issuance costs, net										$ 4,000,000
Line of credit facility														$ 800,000,000
Remaining borrowing capacity										800,000,000
Outstanding principal										$ 0
2.45% Notes, net of discount
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage							2.45%
Aggregate principal amount							$ 600,000,000
Proceeds from issuance debt							593,000,000
2.45% Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										2.45%
Term Loan | Term Loan
Debt Instrument [Line Items]
Line of credit facility																	$ 1,000,000,000
Repayments of all outstanding indebtedness under term loan credit agreement							$ 260,000,000
Repayment of principal borrowed								$ 640,000,000
3.40% Notes, net of discount
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage								3.40%
Aggregate principal amount								$ 650,000,000
Proceeds from issuance debt								$ 642,000,000
3.40% Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										3.40%
4.50% Notes, net of discount
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage																		4.50%
Price as percent of par on offering of unsecured notes																		99.252%
Annual interest rate																		4.594%
4.50% Notes, net of discount | Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage										4.50%								4.50%
Aggregate principal amount																		$ 450,000,000
F&G Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)					0.50%

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