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Statutory Accounting and Dividend Restrictions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Insurance [Abstract]      
Statutory Net Income (Loss) $ 73 $ 81 $ (22)
Statutory Capital and Surplus 1,452 $ 831  
Net assets held at domestic insurance subsidiaries 1,500    
Statutory dividend payments permitted from insurance subsidiaries $ 147