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Schedule I - Summary of Investments Other than Investments in Related Parties | 12 Months Ended
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Dec. 31, 2017
Summary of Investments, Other than Investments in Related Parties [Abstract] |
Schedule I — Summary of Investments Other than Investments in Related Parties | Schedule I — Summary of Investments Other than Investments in Related Parties
|  | As of December 31, 2017
($ in millions) |  | Cost/amortized cost |  | Fair value |  | Amount at which shown in the Balance Sheet
Type of investment |  |  |  |  |  |
Fixed maturities: |  |  |  |  |  |
Bonds: |  |  |  |  |  |
United States government, government agencies and authorities |  | $ | 3,580 |  |  | $ | 3,616 |  |  | $ | 3,616 |
States, municipalities and political subdivisions |  | 8,053 |  |  | 8,328 |  |  | 8,328 |
Foreign governments |  | 1,005 |  |  | 1,021 |  |  | 1,021 |
Public utilities |  | 5,655 |  |  | 5,988 |  |  | 5,988 |
All other corporate bonds |  | 37,341 |  |  | 38,038 |  |  | 38,038 |
Asset-backed securities |  | 1,266 |  |  | 1,272 |  |  | 1,272 |
Residential mortgage-backed securities |  | 480 |  |  | 578 |  |  | 578 |
Commercial mortgage-backed securities |  | 124 |  |  | 128 |  |  | 128 |
Redeemable preferred stocks |  | 21 |  |  | 23 |  |  | 23 |
Total fixed maturities |  | 57,525 |  |  | $ | 58,992 |  |  | 58,992 |
Equity securities: |  |  |  |  |  |
Common stocks: |  |  |  |  |  |
Public utilities |  | 84 |  |  | $ | 99 |  |  | 99 |
Banks, trusts and insurance companies |  | 565 |  |  | 725 |  |  | 725 |
Industrial, miscellaneous and all other |  | 4,591 |  |  | 5,506 |  |  | 5,506 |
Nonredeemable preferred stocks |  | 221 |  |  | 291 |  |  | 291 |
Total equity securities |  | 5,461 |  |  | $ | 6,621 |  |  | 6,621 |
Mortgage loans on real estate |  | 4,534 |  |  | $ | 4,732 |  |  | 4,534 |
Real estate (none acquired in satisfaction of debt) |  | 468 |  |  |  |  | 468 |
Policy loans |  | 905 |  |  |  |  | 905 |
Derivative instruments |  | 127 |  |  | $ | 127 |  |  | 127 |
Limited partnership interests |  | 6,740 |  |  |  |  | 6,740 |
Other long-term investments |  | 2,472 |  |  |  |  | 2,472 |
Short-term investments |  | 1,944 |  |  | $ | 1,944 |  |  | 1,944 |
Total investments |  | $ | 80,176 |  |  |  |  | $ | 82,803 |

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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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