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Notes Payable - Narrative (Details) - USD ($) |  |  |  |  |  |  |  |  |  | 3 Months Ended |  |  |  |  |  |  |
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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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