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v3.19.1

Guaranteed Benefit Features (Narrative) (Details) | 3 Months Ended |
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Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Guaranteed Benefit Features [Abstract] |  |  |
Percent of permanent life insurance in force | 37.00% |  | 35.00%
Percent of permanent life insurance sales | 29.00% | 35.00% |

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- Definition Guaranteed Benefit Features [Abstract] + References No definition available. + Details
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- Definition Universal life and variable universal life products with secondary guarantees in force as a percentage of total permanent life insurance in force. + References No definition available. + Details
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- Definition Sales of universal life and variable universal life products with secondary guarantees as a percentage of total sales of permanent life insurance. + References No definition available. + Details
Name: | lnc_PercentOfPermanentLifeInsuranceSales
Namespace Prefix: | lnc_
Data Type: | num:percentItemType
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