Segments (Operating Earnings Before Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	$ 294.3	$ 435.0	$ 853.7	$ 963.7
Closed Block Variable Annuity	131.0	(167.4)	67.1	(982.9)
Net investment gains (losses) and related charges and adjustments	43.4	64.1	174.0	106.7
Net guaranteed benefit hedging gains (losses) and related charges and adjustments	33.4	10.5	19.5	46.0
Loss related to businesses exited through reinsurance or divestment	(31.9)	(13.1)	(69.3)	(47.0)
Income (loss) attributable to noncontrolling interest	116.6	101.1	296.7	84.5
Other adjustments to operating earnings	(32.0)	(10.2)	(65.6)	(40.5)
Income (loss) before income taxes	554.8	420.0	1,276.1	130.5
Retirement Solutions \| Retirement
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	117.2	187.3	367.9	457.2
Retirement Solutions \| Annuities
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	78.3	96.8	197.3	210.6
Investment Management
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	58.6	54.0	163.3	125.2
Insurance Solutions \| Individual Life
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	39.8	117.0	134.3	207.8
Insurance Solutions \| Employee Benefits
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	37.0	29.1	91.7	75.6
Total Ongoing Businesses
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	330.9	484.2	954.5	1,076.4
Corporate
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	(47.1)	(63.7)	(122.7)	(166.6)
Closed Blocks
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	10.5	14.5	21.9	53.9
Closed Blocks \| Closed Block Institutional Spread Products
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	8.5	8.7	20.5	41.7
Closed Blocks \| Closed Block Other
Segment Reporting Information [Line Items]
Total operating earnings before income taxes	$ 2.0	$ 5.8	$ 1.4	$ 12.2

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

+ Details

Name:	us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.7(c),9(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (c)-(e)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

+ Details

Name:	us-gaap_GainLossOnInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

+ References

No definition available.

+ Details

Name:	us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h)(1)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686

+ Details

Name:	us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest and Dividend Income (Loss), Securities, Closed Block Variable Annuity

+ References

No definition available.

+ Details

Name:	voya_InterestAndDividendIncomeLossSecuritiesClosedBlockVariableAnnuity
Namespace Prefix:	voya_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Other Adjustments to Operating Income (Loss)

+ References

No definition available.

+ Details

Name:	voya_OtherAdjustmentsToOperatingIncomeLoss
Namespace Prefix:	voya_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration