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Related Party Transactions - Financing Agreements (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]      
Due to Related Parties $ 110 $ 125  
Related Party Transaction, Due from (to) Related Party $ 1 5 $ 2
Affiliated entity | Reciprocal Loan Agreement | Voya Financial, Inc.      
Related Party Transaction [Line Items]      
Maximum borrowing capacity, percentage 3.00%    
Short-term loan to affiliate $ 130 653  
Due to Related Parties $ 19 $ 7