v3.26.1
Financing Agreements - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 28, 2026
May 21, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 03, 2026
Mar. 02, 2026
Dec. 31, 2025
May 01, 2023
Debt Instrument [Line Items]                
Outstanding par amount of guaranteed debentures     $ 2,103       $ 2,104  
Total fees associated with credit facilities     0 $ 0        
Business agreement processing and operation services period   10 years            
Facility Agreement, Face Amount   $ 600 550          
Revolving Credit agreement                
Debt Instrument [Line Items]                
Outstanding borrowings     0          
Revolving Credit agreement                
Debt Instrument [Line Items]                
Maximum borrowing capacity     500          
Minimum net worth required for compliance               $ 4,998
Senior Notes                
Debt Instrument [Line Items]                
Annual interest rate on debt   1.518%            
Revolving Credit agreement                
Debt Instrument [Line Items]                
Amount of letters of credit outstanding     0          
Outstanding borrowings     0          
5.0% Senior Notes, due 2034 | Senior Notes                
Debt Instrument [Line Items]                
Debt instrument face amount     $ 400          
Annual interest rate on debt     5.00%          
Outstanding par amount of guaranteed debentures     $ 396       396  
Five Point Zero Five Percent Senior Notes, Due 2036 | Senior Notes                
Debt Instrument [Line Items]                
Debt instrument face amount     $ 400     $ 400    
Annual interest rate on debt     5.05%     5.05%    
Outstanding par amount of guaranteed debentures     $ 395       0  
7.63% Voya Holdings Inc. debentures, due 2026 | Debentures                
Debt Instrument [Line Items]                
Debt instrument face amount     $ 139          
Annual interest rate on debt     7.625%          
Outstanding par amount of guaranteed debentures     $ 139       139  
6.97% Voya Holdings Inc. debentures, due 2036 | Debentures                
Debt Instrument [Line Items]                
Debt instrument face amount     $ 78          
Annual interest rate on debt     6.97%          
Outstanding par amount of guaranteed debentures     $ 79       $ 79  
Voya Holdings Debentures | Aetna Notes                
Debt Instrument [Line Items]                
Amount of collateral for credit facility     233          
Voya Holdings Debentures | Debentures                
Debt Instrument [Line Items]                
Outstanding par amount of guaranteed debentures     $ 218          
Short-term Debt | Revolving Credit agreement                
Debt Instrument [Line Items]                
Maximum borrowing capacity               $ 25
SixPointZeroOneTwoPercentSeniorNotesDue2025Member [Member] | Subsequent Event                
Debt Instrument [Line Items]                
Debt Instrument, Issued, Principal $ 125              
Proceeds from Issuance of Debt $ 125              
SixPointZeroOneTwoPercentSeniorNotesDue2025Member [Member] | Senior Notes                
Debt Instrument [Line Items]                
Debt instrument face amount           $ 50    
Annual interest rate on debt     6.012%   6.012%