Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - 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)	Retained Earnings (Deficit), Unappropriated	Noncontrolling Interest
Beginning balance at Dec. 31, 2018	$ 8,941	$ 8,213	$ 0	$ 3	$ (4,981)	$ 24,316	$ 607	$ (11,732)	$ 728
Beginning balance (Accounting Standards Update 2018-02) at Dec. 31, 2018	0	0	0	0	0	0	343	(343)	0
Comprehensive income (loss):
Net income (loss)	325	300						300	25
Other comprehensive income (loss), after tax	1,917	1,917					1,917	0
Less: Comprehensive income (loss) attributable to noncontrolling interest	25								25
Comprehensive income (loss)	2,242	2,217
Preferred stock issuance	293					293	0	0
Common stock issuance	2	2				2	0	0
Common stock acquired - Share repurchase	(686)	(686)			(646)	(40)	0	0
Dividends on preferred stock	(10)	(10)				0	0	(10)
Dividends on common stock	(3)	(3)				(3)	0	0
Share-based compensation	38	38			(36)	74	0
Contributions from (Distributions to) noncontrolling interest, net	(77)					0	0		(77)
Ending Balance at Jun. 30, 2019	10,740	10,064	0	3	(5,663)	24,642	2,867	(11,785)	676
Beginning balance at Dec. 31, 2018	8,941	8,213	0	3	(4,981)	24,316	607	(11,732)	728
Beginning balance (Accounting Standards Update 2018-02) at Dec. 31, 2018	$ 0	0	0	0	0	0	343	(343)	0
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Ending Balance at Dec. 31, 2019	$ 10,230	9,408	0	2	(460)	11,184	3,331	(4,649)	822
Ending Balance (Accounting Standards Update 2016-13) at Dec. 31, 2019	(33)	(33)	0	0	0	0	0	(33)	0
Beginning balance at Mar. 31, 2019	9,806	9,065		3	(5,203)	24,310	1,966	(12,011)	741
Beginning balance (Accounting Standards Update 2018-02) at Mar. 31, 2019	0	0	0	0	0	0	0	0	0
Comprehensive income (loss):
Net income (loss)	252	226	0	0	0	0	0	226	26
Other comprehensive income (loss), after tax	901	901	0	0	0	0	901	0	0
Less: Comprehensive income (loss) attributable to noncontrolling interest	26								26
Comprehensive income (loss)	1,153	1,127
Preferred stock issuance	293	293	0	0	0	293	0	0	0
Common stock issuance	0	0	0	0	0	0	0	0	0
Common stock acquired - Share repurchase	(436)	(436)	0	0	(446)	10	0	0	0
Dividends on preferred stock	0	0	0	0	0		0	0	0
Dividends on common stock	(2)	(2)	0	0	0	(2)	0	0	0
Share-based compensation	17	17	0	0	(14)	31	0	0	0
Contributions from (Distributions to) noncontrolling interest, net	(91)	0	0	0	0	0	0	0	(91)
Ending Balance at Jun. 30, 2019	10,740	10,064	0	3	(5,663)	24,642	2,867	(11,785)	676
Beginning balance at Dec. 31, 2019	$ 10,230	9,408	0	2	(460)	11,184	3,331	(4,649)	822
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Comprehensive income (loss):
Net income (loss)	$ (224)	(151)	0	0	0	0	0	(151)	(73)
Other comprehensive income (loss), after tax	708	708	0	0	0	0	708	0	0
Less: Comprehensive income (loss) attributable to noncontrolling interest	(73)								(73)
Comprehensive income (loss)	484	557
Net consolidations (deconsolidations) of consolidated investment entities	(103)	0	0	0	0	0	0	0	(103)
Preferred stock issuance	0
Common stock issuance	2	2	0	0	0	2	0	0	0
Common stock acquired - Share repurchase	(366)	(366)	0	0	(406)	40	0	0	0
Dividends on preferred stock	(18)	(18)	0	0	0	(18)	0	0	0
Dividends on common stock	(39)	(39)	0	0	0	(39)	0	0	0
Share-based compensation	37	37	0	0	(21)	58	0	0	0
Contributions from (Distributions to) noncontrolling interest, net	95	0	0	0	0	0	0	0	95
Ending Balance at Jun. 30, 2020	10,289	9,548	0	2	(887)	11,227	4,039	(4,833)	741
Beginning balance at Mar. 31, 2020	8,265	7,427	0	2	(882)	11,232	1,841	(4,766)	838
Beginning balance (Accounting Standards Update 2016-13) at Mar. 31, 2020	0	0	0	0	0	0	0	0	0
Comprehensive income (loss):
Net income (loss)	(146)	(67)	0	0	0	0	0	(67)	(79)
Other comprehensive income (loss), after tax	2,198	2,198	0	0	0	0	2,198	0	0
Less: Comprehensive income (loss) attributable to noncontrolling interest	(79)								(79)
Comprehensive income (loss)	2,052	2,131
Net consolidations (deconsolidations) of consolidated investment entities	(103)	0	0	0	0	0	0	0	(103)
Common stock issuance	0	0	0	0	0	0	0	0	0
Common stock acquired - Share repurchase	0	0	0	0	0	0	0	0	0
Dividends on preferred stock	(4)	(4)	0	0	0	(4)	0	0	0
Dividends on common stock	(19)	(19)	0	0	0	(19)	0	0	0
Share-based compensation	13	13	0	0	(5)	18	0	0	0
Contributions from (Distributions to) noncontrolling interest, net	85	0	0	0	0	0	0	0	85
Ending Balance at Jun. 30, 2020	$ 10,289	$ 9,548	$ 0	$ 2	$ (887)	$ 11,227	$ 4,039	$ (4,833)	$ 741