Financing Agreements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term loan to affiliate	$ 254	$ 254	$ 69
Due to affiliates	$ 80	$ 80	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	$ 254	$ 254	69
Due to affiliates	54	54	$ 0
Interest Income, Related Party	$ 2	$ 3

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

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