Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Investments:
Fixed maturities, available-for-sale, at fair value (amortized cost of $44,366 as of 2017 and $44,743 as of 2016)	$ 48,329	$ 47,394
Fixed maturities, at fair value using the fair value option	3,018	3,065
Equity securities, available-for-sale, at fair value	380	258
Short-term investments	471	391
Mortgage loans on real estate, net of valuation allowance of $3 as of 2017 and 2016	8,686	8,003
Policy loans	1,888	1,943
Limited partnerships/corporations	784	536
Derivatives	397	737
Other investments	47	47
Securities pledged (amortized cost of $1,823 as of 2017 and $1,261 as of 2016)	2,087	1,409
Total investments	66,087	63,783
Cash and cash equivalents	1,218	2,096
Short-term investments under securities loan agreements, including collateral delivered	1,626	586
Accrued investment income	667	666
Premium receivable and reinsurance recoverable	7,632	7,287
Deferred policy acquisition costs, Value of business acquired	3,374	3,997
Current income taxes	4	164
Deferred income taxes	781	1,570
Other assets	1,310	1,486
Assets related to consolidated investment entities:
Assets held in consolidated investment entities	3,176	4,056
Assets held in separate accounts	77,605	66,185
Assets held for sale	59,052	62,709
Total assets	222,532	214,585
Liabilities and Shareholders' Equity:
Future policy benefits	15,647	14,575
Contract owner account balances	50,158	50,273
Payables under securities loan agreement, including collateral held	1,866	969
Short-term debt	337	0
Long-term debt	3,123	3,550
Derivatives	149	297
Pension and other post-employment provisions	550	674
Other liabilities	2,076	2,023
Liabilities related to consolidated investment entities:
Collateralized loan obligations notes, at fair value using the fair value option	1,047	1,967
Other liabilities	658	528
Liabilities related to separate accounts	77,605	66,185
Liabilities held for sale	58,277	59,576
Total liabilities	211,493	200,617
Shareholders' equity:
Common stock ($0.01 par value per share; 900,000,000 shares authorized; 270,078,294 and 268,079,931 shares issued as of 2017 and 2016, respectively; 171,982,673 and 194,639,273 shares outstanding as of 2017 and 2016, respectively)	3	3
Treasury stock (at cost; 98,095,621 and 73,440,658 shares as of 2017 and 2016, respectively)	(3,827)	(2,796)
Additional paid-in capital	23,821	23,609
Accumulated other comprehensive income (loss)	2,731	1,921
Retained earnings (deficit):
Appropriated-consolidated investment entities	0	0
Unappropriated	(12,719)	(9,742)
Total Voya Financial, Inc. shareholders' equity	10,009	12,995
Noncontrolling interest	1,030	973
Total shareholder's equity	11,039	13,968
Total liabilities and shareholder's equity	222,532	214,585
Limited partnerships/corporations, at fair value
Assets related to consolidated investment entities:
Assets held in consolidated investment entities	1,795	1,936
Cash and cash equivalents
Assets related to consolidated investment entities:
Assets held in consolidated investment entities	217	133
Corporate loans, at fair value using the fair value option
Assets related to consolidated investment entities:
Assets held in consolidated investment entities	1,089	1,953
Other assets
Assets related to consolidated investment entities:
Assets held in consolidated investment entities	$ 75	$ 34