| Cover - USD ($) | 12 Months Ended | ||
| Dec. 31, 2022 | Apr. 18, 2023 | Jun. 30, 2022 | |
| Cover [Abstract] | |||
| Document Type | 10-K/A | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2022 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Transition Report | false | ||
| Entity File Number | 001-41490 | ||
| Entity Registrant Name | F&G Annuities & Life, Inc. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 85-2487422 | ||
| Entity Address, Address Line One | 801 Grand Avenue | ||
| Entity Address, Address Line Two | Suite 2600 | ||
| Entity Address, City or Town | Des Moines | ||
| Entity Address, State or Province | IA | ||
| Entity Address, Postal Zip Code | 50309 | ||
| City Area Code | 515 | ||
| Local Phone Number | 330-3340 | ||
| Title of 12(b) Security | Common stock, par value $0.001 per share | ||
| Trading Symbol | FG | ||
| Security Exchange Name | NYSE | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Voluntary Filers | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Non-accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Common Stock, Shares Outstanding | 126,379,456 | ||
| Amendment Flag | false | ||
| Document Fiscal Year Focus | 2022 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Central Index Key | 0001934850 | ||
| Entity Public Float | $ 0 | ||
| Auditor Name | Ernst & Young LLP | ||
| Auditor Location | Des Moines, Iowa | ||
| Auditor Firm ID | 42 |
