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F&G Insurance Subsidiary Financial Information and Regulatory Matters - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Statutory Accounting Practices [Line Items]    
Decrease in statutory capital surplus $ 39 $ 144
Change in statutory capital surplus (85)  
Non-permitted statutory accounting practices 30  
Statutory capital and surplus 114 84
IOWA    
Statutory Accounting Practices [Line Items]    
Change in statutory capital surplus $ 1 5
Non-permitted statutory accounting practices   $ (6)