Variable Interest Entities	12 Months Ended
Variable Interest Entities	Dec. 31, 2018
Variable Interest Entities [Abstract]
Variable Interest Entities	4. Variable Interest Entities Unconsolidated VIEs Reinsurance Related Notes Effective October 1, 2017, our captive reinsurance subsidiary, the Lincoln Reinsurance Company of Vermont VI, restructured the $275 million, long-term surplus note which was originally issued to a non-affiliated VIE in October 2015 in exchange for two corporate bond AFS securities of like principal and duration. The activities of the VIE are primarily to acquire, hold and issue notes and loans and to pay and collect interest on the notes and loans. The outstanding principal balance of the long-term surplus note is variable in nature; moving concurrently with any variability in the face amount of the corporate bond AFS securities. We have concluded that we are not the primary beneficiary of the non-affiliated VIE because we do not have power over the activities that most significantly affect its economic performance. As of December 31, 2018, the principal balance of the long-term surplus note was zero and we do not currently have any exposure to this VIE. Structured Securities Through our investment activities, we make passive investments in structured securities issued by VIEs for which we are not the manager. These structured securities include our RMBS, CMBS, CLOs and CDOs. We have not provided financial or other support with respect to these VIEs other than our original investment. We have determined that we are not the primary beneficiary of these VIEs due to the relative size of our investment in comparison to the principal amount of the structured securities issued by the VIEs and the level of credit subordination that reduces our obligation to absorb losses or right to receive benefits. Our maximum exposure to loss on these structured securities is limited to the amortized cost for these investments. We recognize our variable interest in these VIEs at fair value on our Consolidated Balance Sheets. For information about these structured securities, see Note 5. Limited Partnerships and Limited Liability Companies We invest in certain LPs and limited liability companies (“LLCs”), including qualified affordable housing projects, that we have concluded are VIEs. We do not hold any substantive kick-out or participation rights in the LPs and LLCs, and we do not receive any performance fees or decision maker fees from the LPs and LLCs. Based on our analysis of the LPs and LLCs, we are not the primary beneficiary of the VIEs as we do not have the power to direct the most significant activities of the LPs and LLCs. The carrying amounts of our investments in the LPs and LLCs are recognized in other investments on our Consolidated Balance Sheets and were $1.7 billion and $1.4 billion as of December 31, 2018 and 2017, respectively. Included in these carrying amounts are our investments in qualified affordable housing projects, which were $20 million and $31 million as of December 31, 2018 and 2017, respectively. We do not have any contingent commitments to provide additional capital funding to these qualified affordable housing projects. We receive returns from these qualified affordable housing projects in the form of income tax credits and other tax benefits, which are recognized in federal income tax expense (benefit) on our Consolidated Statements of Comprehensive Income (Loss) and were $1 million and $3 million for the years ended December 31, 2018 and 2017, respectively. Our exposure to loss is limited to the capital we invest in the LPs and LLCs, and there have been no indicators of impairment that would require us to recognize an impairment loss related to the LPs and LLCs as of December 31, 2018.

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.