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Financing Agreements - Narrative (Details) - USD ($)		6 Months Ended
	Mar. 17, 2015	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	May 03, 2023	May 01, 2023	May 16, 2013
Debt Instrument [Line Items]
Outstanding par amount of guaranteed debentures		$ 2,102,000,000		$ 2,098,000,000
Total fees associated with credit facilities		0	$ 0
Business agreement processing and operation services period	10 years
Put option face amount	$ 500,000,000	100,000,000
Maximum borrowing capacity		512,000,000
Outstanding borrowings		12,000,000
Revolving Credit agreement
Debt Instrument [Line Items]
Outstanding borrowings		0
Aetna Notes
Debt Instrument [Line Items]
Amount of letters of credit outstanding		12,000,000
Revolving Credit agreement
Debt Instrument [Line Items]
Maximum borrowing capacity		500,000,000
Minimum net worth required for compliance						$ 4,998,000,000
Senior Notes
Debt Instrument [Line Items]
Annual interest rate on debt	1.875%
Revolving Credit agreement
Debt Instrument [Line Items]
Amount of letters of credit outstanding		0
Outstanding borrowings		$ 0
7.63% Voya Holdings Inc. debentures, due 2026 | Debentures
Debt Instrument [Line Items]
Annual interest rate on debt		7.625%
Outstanding par amount of guaranteed debentures		$ 139,000,000		139,000,000
6.97% Voya Holdings Inc. debentures, due 2036 | Debentures
Debt Instrument [Line Items]
Annual interest rate on debt		6.97%
Outstanding par amount of guaranteed debentures		$ 79,000,000		$ 79,000,000
Voya Holdings Debentures | Aetna Notes
Debt Instrument [Line Items]
Amount of collateral for credit facility		228,000,000
Amount of collateral deposited to a control account		216,000,000
Voya Holdings Debentures | Debentures
Debt Instrument [Line Items]
Outstanding par amount of guaranteed debentures		$ 218,000,000
Pre-Capitalized Trust | Senior Notes
Debt Instrument [Line Items]
Annual interest rate on debt	3.976%
Debt instrument face amount					$ 400,000,000
U.S. Treasuries
Debt Instrument [Line Items]
Debt instrument face amount					$ 400,000,000
Five Point Six Five Percentage Fixed-to-Floating Rate Junior Subordinated Note Due 2053
Debt Instrument [Line Items]
Annual interest rate on debt							5.65%
Short-term Debt | Revolving Credit agreement
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 25,000,000

X

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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