XML 104 R108.htm IDEA: XBRL DOCUMENT v2.4.1.9
Investments (Impaired Commercial Mortgage Loans Identified In Management's Specific Review Of Probable Loan Losses And The Related Allowance) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance $ 31.7us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment $ 26.6us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Impaired recorded investment, with related allowance 74.2us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment 87.7us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Total impaired recorded investment 105.9us-gaap_ImpairedFinancingReceivableRecordedInvestment 114.3us-gaap_ImpairedFinancingReceivableRecordedInvestment
Impaired unpaid principal balance, with no related allowance 31.7us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance 26.6us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
Impaired unpaid principal balance, with related allowance 74.2us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance 87.7us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Total impaired unpaid principal balance 105.9us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance 114.3us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Related Allowance 23.8us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 25.9us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Impaired recorded investment with no related allowance on nonaccrual status 11.0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus 9.1sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
Impaired recorded investment with related allowance on nonaccrual status 8.4sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus 26.4sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
Total impaired recorded investment amount on Nonaccrual Status 19.4us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus 35.5us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Retail [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance 25.0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
16.1us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Impaired recorded investment, with related allowance 52.2us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
58.5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Impaired unpaid principal balance, with no related allowance 25.0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
16.1us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Impaired unpaid principal balance, with related allowance 52.2us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
58.5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Related Allowance 12.3us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
16.1us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Impaired recorded investment with no related allowance on nonaccrual status 10.5sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
7.6sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Impaired recorded investment with related allowance on nonaccrual status 7.7sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
21.6sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_RetailMember
Office [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance 1.6us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
3.9us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Impaired recorded investment, with related allowance 8.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
9.7us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Impaired unpaid principal balance, with no related allowance 1.6us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
3.9us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Impaired unpaid principal balance, with related allowance 8.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
9.7us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Related Allowance 2.9us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
3.8us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Impaired recorded investment with no related allowance on nonaccrual status 0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
1.5sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Impaired recorded investment with related allowance on nonaccrual status 0sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
0.9sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_OfficeMember
Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
1.0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Impaired recorded investment, with related allowance 4.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
12.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Impaired unpaid principal balance, with no related allowance 0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
1.0us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Impaired unpaid principal balance, with related allowance 4.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
12.6us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Related Allowance 1.6us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
2.4us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Impaired recorded investment with no related allowance on nonaccrual status 0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Impaired recorded investment with related allowance on nonaccrual status 0.1sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
1.4sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_IndustrialMember
Commercial [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance 2.3us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
1.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Impaired recorded investment, with related allowance 8.5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
6.0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Impaired unpaid principal balance, with no related allowance 2.3us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
1.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Impaired unpaid principal balance, with related allowance 8.5us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
6.0us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Related Allowance 7.0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
3.6us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Impaired recorded investment with no related allowance on nonaccrual status 0.5sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Impaired recorded investment with related allowance on nonaccrual status 0.6sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
2.5sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_CommercialMember
Apartment And Other [Member]    
Financing Receivable, Impaired [Line Items]    
Impaired recorded investment, with no related allowance 2.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
3.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Impaired recorded investment, with related allowance 0.3us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
0.9us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Impaired unpaid principal balance, with no related allowance 2.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
3.8us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Impaired unpaid principal balance, with related allowance 0.3us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
0.9us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Related Allowance 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Impaired recorded investment with no related allowance on nonaccrual status 0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
0sfg_FinancingReceivableWithNoRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
Impaired recorded investment with related allowance on nonaccrual status $ 0sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember
$ 0sfg_FinancingReceivableWithRelatedAllowanceRecordedInvestmentNonaccrualStatus
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis
= sfg_ApartmentAndOtherMember