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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 |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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