Financing Agreements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term loan to affiliate	$ 431	$ 431		$ 69
Due to affiliates	$ 71	$ 71		95
Voya Financial, Inc. \| Affiliated Entity \| Reciprocal Loan Agreement
Short-term Debt [Line Items]
Percentage of Statutory admitted assets that can be borrowed under Reciprocal Loan Agreement	3.00%	3.00%
Short-term loan to affiliate	$ 431	$ 431		69
Due to affiliates	73	73		$ 0
Interest Income, Related Party	$ 1	$ 4	$ 2

Contractual interest rate for funds borrowed, under the debt agreement.

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