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Financing Agreements - Credit Facilities (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Line of Credit Facility [Line Items]    
Capacity $ 512  
Utilization 12  
Unused Commitment 500  
Unsecured and Committed | Voya Financial, Inc.    
Line of Credit Facility [Line Items]    
Capacity 500  
Utilization 0  
Unused Commitment 500  
Unsecured and Committed | Voya Financial, Inc. Three    
Line of Credit Facility [Line Items]    
Capacity 12 $ 200
Utilization 12  
Unused Commitment $ 0