Schedule I. Summary of Investments (Details) $ in Millions	Dec. 31, 2025 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ (30,435)
Fair Value	29,187
Amount Shown on Consolidated Balance Sheets	29,228
U.S. Treasuries
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(517)
Fair Value	470
Amount Shown on Consolidated Balance Sheets	470
State, municipalities and political subdivisions
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(427)
Fair Value	359
Amount Shown on Consolidated Balance Sheets	359
Foreign corporate public securities and foreign governments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(2,292)
Fair Value	2,157
Amount Shown on Consolidated Balance Sheets	2,157
Residential mortgage-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(3,287)
Fair Value	3,237
Amount Shown on Consolidated Balance Sheets	3,237
Commercial mortgage-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(2,115)
Fair Value	1,879
Amount Shown on Consolidated Balance Sheets	1,879
Other asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(1,977)
Fair Value	1,975
Amount Shown on Consolidated Balance Sheets	1,975
Embedded derivatives - fixed maturities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(24,173)
Fair Value	22,838
Amount Shown on Consolidated Balance Sheets	22,838
Equity Securities [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(72)
Fair Value	72
Amount Shown on Consolidated Balance Sheets	72
Mortgage loans on real estate
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(4,602)
Fair Value	4,534
Amount Shown on Consolidated Balance Sheets	4,575
Policy loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(157)
Fair Value	157
Amount Shown on Consolidated Balance Sheets	157
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(6)
Fair Value	6
Amount Shown on Consolidated Balance Sheets	6
Limited partnerships/corporations
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(1,365)
Fair Value	1,365
Amount Shown on Consolidated Balance Sheets	1,365
Derivatives
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(1)
Fair Value	154
Amount Shown on Consolidated Balance Sheets	154
Other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(61)
Fair Value	61
Amount Shown on Consolidated Balance Sheets	61
US Government Agencies Debt Securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(29)
Fair Value	28
Amount Shown on Consolidated Balance Sheets	28
Debt Security, Corporate, US
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(6,701)
Fair Value	6,012
Amount Shown on Consolidated Balance Sheets	6,012
Private Equity Funds, US
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(4,578)
Fair Value	4,473
Amount Shown on Consolidated Balance Sheets	4,473
Private Equity Funds, Non-US
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	(2,250)
Fair Value	2,248
Amount Shown on Consolidated Balance Sheets	$ 2,248

VOYA RETIREMENT INSURANCE & ANNUITY Co 10-K