Consolidated Statements of Changes in Shareholder's Equity - USD ($) $ in Millions	Total	Total Voya Financial, Inc. Shareholders' Equity	Preferred Stock	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Appropriated	Unappropriated	Noncontrolling Interest	Previously Reported	Previously Reported Total Voya Financial, Inc. Shareholders' Equity	Previously Reported Preferred Stock	Previously Reported Common Stock	Previously Reported Treasury Stock	Previously Reported Additional Paid-In Capital	Previously Reported Accumulated Other Comprehensive Income (Loss)	Previously Reported Appropriated	Previously Reported Unappropriated	Previously Reported Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Adjustment for adoption of ASU | Accounting Standards Update 2016-09	$ 15.0	$ 15.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 15.0	$ 0.0
Balance- As adjusted	14,083.0	13,010.0	0.0	3.0	(2,796.0)	23,609.0	1,921.0	0.0	(9,727.0)	1,073.0
Balance at Dec. 31, 2016											$ 14,068.0	$ 12,995.0	$ 0.0	$ 3.0	$ (2,796.0)	$ 23,609.0	$ 1,921.0	$ 0.0	$ (9,742.0)	$ 1,073.0
Comprehensive income (loss)
Net income (loss)	(2,775.0)	(2,992.0)	0.0	0.0	0.0	0.0	0.0	0.0	(2,992.0)	217.0
Other comprehensive income (loss), after tax	810.0	810.0	0.0	0.0	0.0	0.0	810.0	0.0	0.0	0.0
Less: Comprehensive income (loss) attributable to noncontrolling interest	217.0									217.0
Comprehensive income (loss)	(1,965.0)	(2,182.0)
Net consolidations (deconsolidations) of consolidated investment entities	38.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	38.0
Common stock issuance	3.0	3.0	0.0	0.0	0.0	3.0	0.0	0.0	0.0	0.0
Common stock acquired - Share repurchase	(923.0)	(923.0)	0.0	0.0	(1,023.0)	(100.0)	0.0	0.0	0.0	0.0
Treasury stock retirement									0.0
Dividends on common stock	(8.0)	(8.0)	0.0	0.0	0.0	(8.0)	0.0	0.0	0.0	0.0
Share-based compensation	109.0	109.0	0.0	0.0	(8.0)	117.0	0.0	0.0	0.0	0.0
Contributions from (Distributions to) noncontrolling interest, net	(206.0)	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	(206.0)
Balance at Dec. 31, 2017											$ 11,131.0	$ 10,009.0	$ 0.0	$ 3.0	$ (3,827.0)	$ 23,821.0	$ 2,731.0	$ 0.0	$ (12,719.0)	$ 1,122.0
Increase (Decrease) in Stockholders' Equity
Adjustment for adoption of ASU | Accounting Standards Update 2014-09	84.0	84.0	0.0	0.0	0.0	0.0	0.0	0.0	84.0	0.0
Adjustment for adoption of ASU | Accounting Standards Update 2016-01	0.0	0.0	0.0	0.0	0.0	0.0	(28.0)	0.0	28.0	0.0
Balance- As adjusted	11,215.0	10,093.0	0.0	3.0	(3,827.0)	23,821.0	2,703.0	0.0	(12,607.0)	1,122.0
Comprehensive income (loss)
Net income (loss)	1,020.0	875.0	0.0	0.0	0.0	0.0	0.0	0.0	875.0	145.0
Reversal of Other Comprehensive Income (Loss) due to Sale of Annuity and CBVA	(79.0)	(79.0)	0.0	0.0	0.0	0.0	(79.0)	0.0	0.0	0.0
Other comprehensive income (loss), after tax	(2,017.0)	(2,017.0)	0.0	0.0	0.0	0.0	(2,017.0)	0.0	0.0	0.0
Other comprehensive income (loss), after tax	(2,096.0)
Less: Comprehensive income (loss) attributable to noncontrolling interest	145.0									145.0
Comprehensive income (loss)	(1,076.0)	(1,221.0)
Effect of transaction for entities under common control	(31.0)	(31.0)	0.0	0.0	0.0	(31.0)	0.0	0.0	0.0	0.0
Net consolidations (deconsolidations) of consolidated investment entities	(33.0)	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	(33.0)
Preferred stock issuance	319.0	319.0	0.0	0.0	0.0	319.0	0.0	0.0	0.0	0.0
Common stock issuance	3.0	3.0	0.0	0.0	0.0	3.0	0.0	0.0	0.0	0.0
Common stock acquired - Share repurchase	(1,025.0)	(1,025.0)	0.0	0.0	(1,125.0)	100.0	0.0	0.0	0.0	0.0
Treasury stock retirement									0.0
Dividends on common stock	(6.0)	(6.0)	0.0	0.0	0.0	(6.0)	0.0	0.0	0.0	0.0
Share-based compensation	81.0	81.0	0.0	0.0	(29.0)	110.0	0.0	0.0	0.0	0.0
Contributions from (Distributions to) noncontrolling interest, net	(441.0)	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	(442.0)
Balance at Dec. 31, 2018	9,005.0	8,213.0	0.0	3.0	(4,981.0)	24,316.0	607.0	0.0	(11,732.0)	792.0
Comprehensive income (loss)
Net income (loss)	(301.0)	(351.0)	0.0	0.0	0.0	0.0	0.0	0.0	(351.0)	50.0
Other comprehensive income (loss), after tax	2,381.0	2,381.0	0.0	0.0	0.0	0.0	2,381.0	0.0	0.0	0.0
Less: Comprehensive income (loss) attributable to noncontrolling interest	50.0									50.0
Comprehensive income (loss)	2,080.0	2,030.0
Preferred stock issuance	293.0	293.0	0.0	0.0	0.0	293.0	0.0	0.0	0.0	0.0
Common stock issuance	3.0	3.0	0.0	0.0	0.0	3.0	0.0	0.0	0.0	0.0
Common stock acquired - Share repurchase	(1,136.0)	(1,136.0)	0.0	0.0	(1,096.0)	(40.0)	0.0	0.0	0.0	0.0
Treasury stock retirement	0.0	0.0	0.0	(1.0)	5,666.0	(13,452.0)	0.0	0.0	7,787.0	0.0
Dividends on preferred stock	28.0	28.0	0.0	0.0	0.0	18.0	0.0	0.0	10.0	0.0
Dividends on common stock	(44.0)	(44.0)	0.0	0.0	0.0	(44.0)	0.0	0.0	0.0	0.0
Share-based compensation	77.0	77.0	0.0	0.0	(49.0)	126.0	0.0	0.0	0.0	0.0
Contributions from (Distributions to) noncontrolling interest, net	(20.0)	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	(20.0)
Balance at Dec. 31, 2019	10,230.0	9,408.0	0.0	2.0	(460.0)	11,184.0	3,331.0	0.0	(4,649.0)	822.0
Increase (Decrease) in Stockholders' Equity
Adjustment for adoption of ASU | Accounting Standards Update 2018-02	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 343.0	$ 0.0	$ (343.0)	$ 0.0