Investments - Impaired Loans 2 (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014 loan	Dec. 31, 2013 loan
Investments, Debt and Equity Securities [Abstract]
Troubled debt restructured loans	$ 76.0	$ 86.6
Loans 90 days or more past due, interest no longer accruing, at amortized cost	0	5.1
Unpaid principal balance of loans 90 days or more past due, interest no longer accruing	$ 0	$ 5.1
Number of loans in arrears	0	1

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are equal to or greater than 90 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

- Definition

Impaired Financing Receivable, Unpaid Principal Balance, Equal to or Greater than 90 Days Past Due

+ References

No definition available.

+ Details

Name:	voya_ImpairedFinancingReceivableUnpaidPrincipalBalanceEqualToOrGreaterThan90DaysPastDue
Namespace Prefix:	voya_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Impaired Financing Receivable, Unpaid Principal Balance, Number of Loans in Arrears

+ References

No definition available.

+ Details

Name:	voya_ImpairedFinancingReceivableUnpaidPrincipalBalanceNumberOfLoansInArrears
Namespace Prefix:	voya_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant