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Statutory Results - Summary of Statutory Results (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 28, 2021
Sep. 18, 2020
Sep. 16, 2019
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2019
Statutory Accounting Practices [Line Items]              
Combined statutory net income (loss)       $ (426) $ (2) $ 245 $ 488
Statutory capital       2,153   3,142,000  
Statutory accounting practices, prescribed practice amount       $ 29   $ 51  
Talcott Resolution Life, Inc              
Statutory Accounting Practices [Line Items]              
Dividends paid with approval of regulatory agency $ 500 $ 319 $ 700