XML 61 R49.htm IDEA: XBRL DOCUMENT
v3.19.1

Investments (Credit Quality Indicators For Residential Mortgage Loans) (Details) - Residential [Member] - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Mortgage Loans Credit Quality [Line Items] |  |
Carrying value of mortgage loans on real estate | $ 416 | $ 248
Percentage of total mortgage loans on real estate | 100.00% | 100.00%
Performing [Member] |  |
Mortgage Loans Credit Quality [Line Items] |  |
Carrying value of mortgage loans on real estate | $ 414 | $ 247
Percentage of total mortgage loans on real estate | 99.50% | 99.60%
Nonperforming [Member] |  |
Mortgage Loans Credit Quality [Line Items] |  |
Carrying value of mortgage loans on real estate | $ 2 | $ 1
Percentage of total mortgage loans on real estate | 0.50% | 0.40%

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | lnc_MortgageLoansCreditQualityLineItems
Namespace Prefix: | lnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the percentage derived from dividing mortgage loans with a specified loan-to-value ratio by total principal amount of mortgage loans. + References No definition available. + Details
Name: | lnc_PercentageOfTotalMortgageLoans
Namespace Prefix: | lnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column G)) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
Name: | us-gaap_MortgageLoansOnRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |