v3.26.1
Document and Entity Information - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Aug. 07, 2026
Entity Information [Line Items]          
Document Type     10-Q    
Document Quarterly Report     true    
Document Period End Date     Jun. 30, 2026    
Document Transition Report     false    
Entity File Number     033-23376    
Entity Registrant Name     Voya Retirement Insurance and Annuity Company    
Entity Incorporation, State or Country Code     CT    
Entity Tax Identification Number     71-0294708    
Entity Address, Address Line One     One Orange Way    
Entity Address, City or Town     Windsor,    
Entity Address, State or Province     CT    
Entity Address, Postal Zip Code     06095-4774    
City Area Code     860    
Local Phone Number     580-4646    
Entity Current Reporting Status     Yes    
Entity Interactive Data Current     Yes    
Entity Filer Category     Non-accelerated Filer    
Entity Small Business     false    
Entity Emerging Growth Company     false    
Entity Shell Company     false    
Entity Common Stock, Shares Outstanding         55,000
Common Stock, Par or Stated Value Per Share $ 50   $ 50    
Entity Central Index Key     0000837010    
Current Fiscal Year End Date     --12-31    
Document Fiscal Year Focus     2026    
Document Fiscal Period Focus     Q2    
Amendment Flag     false    
Revenues $ 721 $ 716 $ 1,465 $ 1,445  
Benefits, Losses and Expenses 583 558 1,169 1,114  
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 138 158 296 331  
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ 123 $ 138 $ 262 $ 288