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Commissions and Other Expenses (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Details underlying commissions and other expenses [Abstract] |  |  |
Commissions | $ 2,549 | $ 2,256 | $ 1,986
General and administrative expenses | 2,210 | 1,953 | 1,766
Expenses associated with reserve financing and unrelated LOCs | 88 | 84 | 87
DAC and VOBA deferrals and interest, net of amortization | (540) | (402) | (350)
Broker-dealer expenses | 481 | 465 | 438
Specifically identifiable intangible asset amortization | 26 | 9 | 4
Taxes, licenses and fees | 343 | 313 | 245
Acquisition and integration costs related to mergers and acquisitions | 130 | 85 |
Total | $ 5,287 | $ 4,763 | $ 4,176

X
- Definition Commissions, general and administrative, and taxes, licenses and fees expense related to broker dealers. + References No definition available. + Details
Name: | lnc_BrokerDealerExpenses
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Additions during the period in capitalized costs that are directly related to the successful acquisition of new and renewal insurance contracts and coverages and value of business acquired, including interest, net of the amount of DAC and VOBA that was amortized during the period, generally in proportion to related revenue earned, estimated gross profits, or over the customer relationship or some other period. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Details underlying commissions and other expenses [Abstract] + References No definition available. + Details
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X
- Definition This item represents merger-related expenses that were the result of actions undertaken by the entity to eliminate duplicate operations and functions as a result of a merger along with costs related to the implementation of a new unified product portfolio and other initiatives. + References No definition available. + Details
Name: | lnc_MergerRelatedExpenses
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X
- Definition The aggregate expense charged against earnings to allocate the cost of other intangible assets not otherwise specified in the taxonomy (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. + References No definition available. + Details
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X
- Definition Expenses associated with reserve financing supporting secondary guarantee UL and term business, and expenses for unrelated letters of credit. + References No definition available. + Details
Name: | lnc_ReserveFinancingExpenses
Namespace Prefix: | lnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax incurred and cost of license directly related to good produced or service rendered. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(2)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition The expense incurred by an insurance company to persons or entities for generating or placing insurance or investment contracts with the company, usually determined as a percentage of policy or contract premiums. Excludes advances or draws to be applied against commissions earned. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.7(a)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 + Details
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- Definition The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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