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SCHEDULE I - CONSOLIDATED SUMMARY OF INVESTMENTS, OTHER THAN INVESTMENTS IN RELATED PARTIES | 12 Months Ended
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Dec. 31, 2017
Consolidated Summary of Investments, Other than Investments in Related Parties [Abstract] |
Summary of Investments - Other than Investments in Related Parties Supplemental Schedule | LINCOLN NATIONAL CORPORATION SCHEDULE I – CONSOLIDATED SUMMARY OF INVESTMENTS – OTHER THAN INVESTMENTS IN RELATED PARTIES (in millions) ﻿
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﻿Column A |  | Column B |  | Column C |  | Column D |
﻿ |  | As of December 31, 2017 |
﻿ |  |  |  | Fair |  | Carrying |
﻿Type of Investment |  | Cost |  | Value |  | Value |
﻿Available-For-Sale Fixed Maturity Securities (1) |  |  |  |  |  |  |  |  |  |
﻿Bonds: |  |  |  |  |  |  |  |  |  |
﻿U.S. government bonds |  | $ | 527 |  | $ | 567 |  | $ | 567 |
﻿Foreign government bonds |  |  | 395 |  |  | 451 |  |  | 451 |
﻿State and municipal bonds |  |  | 4,172 |  |  | 5,119 |  |  | 5,119 |
﻿Public utilities |  |  | 12,785 |  |  | 14,244 |  |  | 14,244 |
﻿All other corporate bonds |  |  | 62,916 |  |  | 67,972 |  |  | 67,972 |
﻿Mortgage-backed and asset-backed securities |  |  | 5,623 |  |  | 5,847 |  |  | 5,847 |
﻿Hybrid and redeemable preferred securities |  |  | 575 |  |  | 640 |  |  | 640 |
﻿Total available-for-sale fixed maturity securities |  |  | 86,993 |  |  | 94,840 |  |  | 94,840 |
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﻿Available-For-Sale Equity Securities (1) |  |  |  |  |  |  |  |  |  |
﻿Common stocks: |  |  |  |  |  |  |  |  |  |
﻿Banks, trusts and insurance companies |  |  | 184 |  |  | 188 |  |  | 188 |
﻿Industrial, miscellaneous and all other |  |  | 44 |  |  | 33 |  |  | 33 |
﻿Non-redeemable preferred securities |  |  | 19 |  |  | 25 |  |  | 25 |
﻿Total available-for-sale equity securities |  |  | 247 |  |  | 246 |  |  | 246 |
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﻿Trading securities |  |  | 1,425 |  |  | 1,620 |  |  | 1,620 |
﻿Mortgage loans on real estate |  |  | 10,762 |  |  | 10,877 |  |  | 10,762 |
﻿Real estate |  |  | 11 |  |  | N/A |  |  | 11 |
﻿Policy loans |  |  | 2,399 |  |  | N/A |  |  | 2,399 |
﻿Derivative investments (2) |  |  | 1,538 |  |  | 915 |  |  | 915 |
﻿Other investments |  |  | 2,296 |  |  | 2,296 |  |  | 2,296 |
﻿Total investments |  | $ | 105,671 |  |  |  |  | $ | 113,089 |
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| (1) |  | Investments deemed to have declines in value that are other-than-temporary are written down or reserved for to reduce the carrying value to their estimated realizable value.
| (2) |  | Derivative investment assets were offset by $338 million in derivative liabilities reflected in other liabilities on our Consolidated Balance Sheets.

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- Definition The entire disclosure for the schedule applicable to insurance companies summarizing investments held as of the most recent audited balance sheet. At a minimum, such summary is by three major categories of investments including: (1) fixed maturities primarily consisting of bonds, including convertibles and bonds with warrants, and redeemable preferred stocks, (2) equity securities primarily consisting of common stocks and nonredeemable preferred stocks, and (3) other investments including mortgage loans on real estate, real estate held for investment, real estate acquired in satisfaction of debt, policy loans, other long-term investments, and short-term investments not otherwise categorized. The information provided with respect to each item within each category includes: (A) the original cost of equity securities and, as to fixed maturity securities, original cost reduced by repayments and adjusted for amortization of premiums or accrual of discounts, (B) fair value as of the reporting date, and (C) the amount at which the item within each category is shown in the statement of financial position; with respect to (C), if the amount at which shown in the statement of financial position is different from the items original [amortized] cost or fair value, an explanation of the difference may be included herein. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=4738149 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 325 -URI http://asc.fasb.org/subtopic&trid=4738175 + Details
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