Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Adoption of ASU	Total Voya Financial, Inc. Shareholders' Equity	Total Voya Financial, Inc. Shareholders' Equity Adoption of ASU	Preferred Stock	Preferred Stock Adoption of ASU	Common Stock	Common Stock Adoption of ASU	Treasury Stock	Treasury Stock Adoption of ASU	Additional Paid-In Capital	Additional Paid-In Capital Adoption of ASU	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Adoption of ASU	Retained Earnings (Deficit), Unappropriated	Retained Earnings (Deficit), Unappropriated Adoption of ASU	Noncontrolling Interest	Noncontrolling Interest Adoption of ASU
Beginning balance at Dec. 31, 2018	$ 8,941	$ 0	$ 8,213	$ 0	$ 0	$ 0	$ 3	$ 0	$ (4,981)	$ 0	$ 24,316	$ 0	$ 607	$ 343	$ (11,732)	$ (343)	$ 728	$ 0
Comprehensive income (loss):
Net income (loss)	465		421												421		44
Other comprehensive income (loss), after tax	2,547		2,547										2,547		0
Less: Comprehensive income (loss) attributable to noncontrolling interest	44																44
Comprehensive income (loss)	3,012		2,968
Preferred stock issuance	293										293		0		0
Common stock issuance	3		3								3		0		0
Common stock acquired - Share repurchase	(936)		(936)						(936)		0		0		0
Dividends on preferred stock	(24)		(24)								(14)		0		(10)
Dividends on common stock	(23)		(23)								(23)		0		0
Share-based compensation	58		58						(38)		96		0
Contributions from (Distributions to) noncontrolling interest, net	(111)										0		0				(111)
Ending Balance at Sep. 30, 2019	11,213		10,552		0		3		(5,955)		24,671		3,497		(11,664)		661
Beginning balance at Jun. 30, 2019	10,740	0	10,064	0		0	3	0	(5,663)	0	24,642	0	2,867	0	(11,785)	0	676	0
Comprehensive income (loss):
Net income (loss)	140		121		0		0		0		0		0		121		19
Other comprehensive income (loss), after tax	630		630		0		0		0		0		630		0		0
Less: Comprehensive income (loss) attributable to noncontrolling interest	19																19
Comprehensive income (loss)	770		751
Preferred stock issuance	293		293		0		0		0		0		0		0		0
Common stock issuance	1		1		0		0		0		(14)		0		0		0
Common stock acquired - Share repurchase	(250)		(250)		0		0		(290)		40		0		0		0
Dividends on preferred stock	(14)		(14)		0		0		0				0		0		0
Dividends on common stock	(20)		(20)		0		0		0		(20)		0		0		0
Share-based compensation	20		20		0		0		(2)		22		0		0		0
Contributions from (Distributions to) noncontrolling interest, net	(34)		0		0		0		0		0		0		0		(34)
Ending Balance at Sep. 30, 2019	11,213		10,552		0		3		(5,955)		24,671		3,497		(11,664)		661
Beginning balance at Dec. 31, 2019	$ 10,230	(33)	9,408	(33)	0	0	2	0	(460)	0	11,184	0	3,331	0	(4,649)	(33)	822	0
Increase (Decrease) in Stockholders' Equity
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Comprehensive income (loss):
Net income (loss)	$ (437)		(470)		0		0		0		0		0		(470)		33
Other comprehensive income (loss), after tax	1,152		1,152		0		0		0		0		1,152		0		0
Less: Comprehensive income (loss) attributable to noncontrolling interest	33																33
Comprehensive income (loss)	715		682
Net consolidations (deconsolidations) of consolidated investment entities	(103)		0		0		0		0		0		0		0		(103)
Preferred stock issuance	0
Common stock issuance	4		4		0		0		0		4		0		0		0
Common stock acquired - Share repurchase	(366)		(366)		0		0		(406)		40		0		0		0
Dividends on preferred stock	(32)		(32)		0		0		0		(32)		0		0		0
Dividends on common stock	(58)		(58)		0		0		0		(58)		0		0		0
Share-based compensation	52		52		0		0		(23)		75		0		0		0
Contributions from (Distributions to) noncontrolling interest, net	236		0		0		0		0		0		0		0		236
Ending Balance at Sep. 30, 2020	10,645		9,657		0		2		(889)		11,213		4,483		(5,152)		988
Beginning balance at Jun. 30, 2020	10,289	$ 0	9,548	$ 0	0	$ 0	2	$ 0	(887)	$ 0	11,227	$ 0	4,039	$ 0	(4,833)	$ 0	741	$ 0
Comprehensive income (loss):
Net income (loss)	(213)		(319)		0		0		0		0		0		(319)		106
Other comprehensive income (loss), after tax	444		444		0		0		0		0		444		0		0
Less: Comprehensive income (loss) attributable to noncontrolling interest	106																106
Comprehensive income (loss)	231		125
Net consolidations (deconsolidations) of consolidated investment entities	0		0		0		0		0		0		0		0		0
Common stock issuance	2		2		0		0		0		2		0		0		0
Common stock acquired - Share repurchase	0		0		0		0		0		0		0		0		0
Dividends on preferred stock	(14)		(14)		0		0		0		(14)		0		0		0
Dividends on common stock	(19)		(19)		0		0		0		(19)		0		0		0
Share-based compensation	15		15		0		0		(2)		17		0		0		0
Contributions from (Distributions to) noncontrolling interest, net	141		0		0		0		0		0		0		0		141
Ending Balance at Sep. 30, 2020	$ 10,645		$ 9,657		$ 0		$ 2		$ (889)		$ 11,213		$ 4,483		$ (5,152)		$ 988