Schedule II - Condensed Financial Information of Parent - Returns of Capital and Dividends (Details) - Parent Issuer - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	$ 1,064	$ 1,282	$ 1,093
Voya Holdings Inc.
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	786	708	1,020
Return of capital contributions and dividends from subsidiaries, noncash		70
Security Life of Denver International Ltd
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	228	425	0
Security Life of Denver Insurance Company
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	0	52	73
Voya Financial Products Company, Inc.
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	0	12	0
Voya Services Company
Condensed Financial Statements, Captions [Line Items]
Return of capital contributions and dividends from subsidiaries	$ 50	85	$ 0
Return of capital contributions and dividends from subsidiaries, noncash		$ 5