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Investments | 9 Months Ended
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Sep. 30, 2017
Investments [Abstract] |
Investments | ﻿ 4. Investments ﻿ AFS Securities ﻿ See Note 1 in our 2016 Form 10-K for information regarding our accounting policy relating to AFS securities, which also includes additional disclosures regarding our fair value measurements. ﻿ The amortized cost, gross unrealized gains, losses and OTTI and fair value of AFS securities (in millions) were as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017 |
﻿ | Amortized |  | Gross Unrealized |  |  |  |  | Fair |
﻿ | Cost |  | Gains |  | Losses |  | OTTI (1) |  | Value |
﻿Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | 75,400 |  | $ | 6,317 |  | $ | 421 |  | $ | (5 | ) | $ | 81,301 |
﻿Asset-backed securities ("ABS") |  | 951 |  |  | 51 |  |  | 7 |  |  | (23 | ) |  | 1,018 |
﻿U.S. government bonds |  | 533 |  |  | 43 |  |  | 2 |  |  | - |  |  | 574 |
﻿Foreign government bonds |  | 396 |  |  | 59 |  |  | - |  |  | - |  |  | 455 |
﻿Residential mortgage-backed securities ("RMBS") |  | 3,339 |  |  | 171 |  |  | 38 |  |  | (22 | ) |  | 3,494 |
﻿Commercial mortgage-backed securities ("CMBS") |  | 532 |  |  | 10 |  |  | 2 |  |  | (3 | ) |  | 543 |
﻿Collateralized loan obligations ("CLOs") |  | 687 |  |  | 4 |  |  | 1 |  |  | (4 | ) |  | 694 |
﻿State and municipal bonds |  | 4,180 |  |  | 877 |  |  | 8 |  |  | - |  |  | 5,049 |
﻿Hybrid and redeemable preferred securities |  | 575 |  |  | 87 |  |  | 23 |  |  | - |  |  | 639 |
﻿Total fixed maturity securities |  | 86,593 |  |  | 7,619 |  |  | 502 |  |  | (57 | ) |  | 93,767 |
﻿Equity securities |  | 296 |  |  | 19 |  |  | 13 |  |  | - |  |  | 302 |
﻿Total AFS securities | $ | 86,889 |  | $ | 7,638 |  | $ | 515 |  | $ | (57 | ) | $ | 94,069 |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016 |
﻿ | Amortized |  | Gross Unrealized |  |  |  |  | Fair |
﻿ | Cost |  | Gains |  | Losses |  | OTTI (1) |  | Value |
﻿Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | 73,275 |  | $ | 4,754 |  | $ | 970 |  | $ | (5 | ) | $ | 77,064 |
﻿ABS |  | 1,047 |  |  | 39 |  |  | 14 |  |  | (13 | ) |  | 1,085 |
﻿U.S. government bonds |  | 384 |  |  | 37 |  |  | 2 |  |  | - |  |  | 419 |
﻿Foreign government bonds |  | 449 |  |  | 58 |  |  | 1 |  |  | - |  |  | 506 |
﻿RMBS |  | 3,534 |  |  | 147 |  |  | 73 |  |  | (6 | ) |  | 3,614 |
﻿CMBS |  | 345 |  |  | 8 |  |  | 4 |  |  | (1 | ) |  | 350 |
﻿CLOs |  | 742 |  |  | 1 |  |  | 3 |  |  | (4 | ) |  | 744 |
﻿State and municipal bonds |  | 3,929 |  |  | 718 |  |  | 20 |  |  | - |  |  | 4,627 |
﻿Hybrid and redeemable preferred securities |  | 582 |  |  | 70 |  |  | 48 |  |  | - |  |  | 604 |
﻿VIEs’ fixed maturity securities |  | 200 |  |  | - |  |  | - |  |  | - |  |  | 200 |
﻿Total fixed maturity securities |  | 84,487 |  |  | 5,832 |  |  | 1,135 |  |  | (29 | ) |  | 89,213 |
﻿Equity securities |  | 260 |  |  | 19 |  |  | 4 |  |  | - |  |  | 275 |
﻿Total AFS securities | $ | 84,747 |  | $ | 5,851 |  | $ | 1,139 |  | $ | (29 | ) | $ | 89,488 |
﻿
| (1) |  | Includes unrealized (gains) and losses on impaired securities related to changes in the fair value of such securities subsequent to the impairment measurement date.
﻿ The amortized cost and fair value of fixed maturity AFS securities by contractual maturities (in millions) as of September 30, 2017, were as follows: ﻿
﻿ |  |  |  |  |  |
﻿ |  |  |  |  |  |
﻿ | Amortized |  | Fair |
﻿ | Cost |  | Value |
﻿Due in one year or less | $ | 3,699 |  | $ | 3,750 |
﻿Due after one year through five years |  | 18,220 |  |  | 19,076 |
﻿Due after five years through ten years |  | 17,029 |  |  | 17,759 |
﻿Due after ten years |  | 42,136 |  |  | 47,433 |
﻿Subtotal |  | 81,084 |  |  | 88,018 |
﻿Structured securities (ABS, MBS, CLOs) |  | 5,509 |  |  | 5,749 |
﻿Total fixed maturity AFS securities | $ | 86,593 |  | $ | 93,767 |
﻿ Actual maturities may differ from contractual maturities because issuers may have the right to call or pre-pay obligations. ﻿ The fair value and gross unrealized losses, including the p ortion of OTTI recognized in OCI, of AFS securities (dollars in millions), aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017 |
﻿ | Less Than or Equal |  | Greater Than |  |  |  |  |  |  |  |
﻿ | to Twelve Months |  | Twelve Months |  | Total |
﻿ |  |  | Gross |  |  |  | Gross |  |  |  |  |  | Gross |
﻿ |  | Unrealized |  | Unrealized |  |  |  | Unrealized
﻿ | Fair | Losses and | Fair | Losses and | Fair |  | Losses and
﻿ | Value |  | OTTI |  | Value |  | OTTI |  | Value |  |  | OTTI |
﻿Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | 7,624 |  | $ | 206 |  | $ | 2,273 |  | $ | 218 |  | $ | 9,897 |  |  | $ | 424 |
﻿ABS |  | 88 |  |  | 2 |  |  | 156 |  |  | 17 |  |  | 244 |  |  |  | 19 |
﻿U.S. government bonds |  | 172 |  |  | 2 |  |  | - |  |  | - |  |  | 172 |  |  |  | 2 |
﻿RMBS |  | 770 |  |  | 31 |  |  | 128 |  |  | 8 |  |  | 898 |  |  |  | 39 |
﻿CMBS |  | 126 |  |  | 2 |  |  | 7 |  |  | 1 |  |  | 133 |  |  |  | 3 |
﻿CLOs |  | 175 |  |  | 1 |  |  | 6 |  |  | - |  |  | 181 |  |  |  | 1 |
﻿State and municipal bonds |  | 88 |  |  | 3 |  |  | 57 |  |  | 5 |  |  | 145 |  |  |  | 8 |
﻿Hybrid and redeemable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿preferred securities |  | 20 |  |  | - |  |  | 125 |  |  | 23 |  |  | 145 |  |  |  | 23 |
﻿Total fixed maturity securities |  | 9,063 |  |  | 247 |  |  | 2,752 |  |  | 272 |  |  | 11,815 |  |  |  | 519 |
﻿Equity securities |  | 26 |  |  | 11 |  |  | 8 |  |  | 2 |  |  | 34 |  |  |  | 13 |
﻿Total AFS securities | $ | 9,089 |  | $ | 258 |  | $ | 2,760 |  | $ | 274 |  | $ | 11,849 |  |  | $ | 532 |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total number of AFS securities in an unrealized loss position |  |  |  |  |  |  |  |  |  |  |  |  | 1,052 |
﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016 |
﻿ | Less Than or Equal |  | Greater Than |  |  |  |  |  |  |  |
﻿ | to Twelve Months |  | Twelve Months |  | Total |
﻿ |  |  | Gross |  |  |  | Gross |  |  |  |  |  | Gross |
﻿ |  | Unrealized |  | Unrealized |  |  |  | Unrealized
﻿ | Fair | Losses and | Fair | Losses and | Fair |  | Losses and
﻿ | Value |  | OTTI |  | Value |  | OTTI |  | Value |  |  | OTTI |
﻿Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | 15,820 |  | $ | 569 |  | $ | 3,187 |  | $ | 403 |  | $ | 19,007 |  |  | $ | 972 |
﻿ABS |  | 201 |  |  | 4 |  |  | 298 |  |  | 25 |  |  | 499 |  |  |  | 29 |
﻿U.S. government bonds |  | 18 |  |  | 2 |  |  | - |  |  | - |  |  | 18 |  |  |  | 2 |
﻿Foreign government bonds |  | 29 |  |  | 1 |  |  | - |  |  | - |  |  | 29 |  |  |  | 1 |
﻿RMBS |  | 989 |  |  | 58 |  |  | 392 |  |  | 23 |  |  | 1,381 |  |  |  | 81 |
﻿CMBS |  | 190 |  |  | 4 |  |  | 19 |  |  | 2 |  |  | 209 |  |  |  | 6 |
﻿CLOs |  | 259 |  |  | 3 |  |  | 25 |  |  | - |  |  | 284 |  |  |  | 3 |
﻿State and municipal bonds |  | 227 |  |  | 12 |  |  | 47 |  |  | 8 |  |  | 274 |  |  |  | 20 |
﻿Hybrid and redeemable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿preferred securities |  | 76 |  |  | 4 |  |  | 143 |  |  | 44 |  |  | 219 |  |  |  | 48 |
﻿Total fixed maturity securities |  | 17,809 |  |  | 657 |  |  | 4,111 |  |  | 505 |  |  | 21,920 |  |  |  | 1,162 |
﻿Equity securities |  | 4 |  |  | 2 |  |  | 44 |  |  | 2 |  |  | 48 |  |  |  | 4 |
﻿Total AFS securities | $ | 17,813 |  | $ | 659 |  | $ | 4,155 |  | $ | 507 |  | $ | 21,968 |  |  | $ | 1,166 |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Total number of AFS securities in an unrealized loss position |  |  |  |  |  |  |  |  |  |  |  |  | 1,744 |
﻿ The fair value, gross unrealized losses, the portion of OTTI recognized in OCI (in millions) and number of AFS securities where the fair value had declined and remained below amortized cost by greater than 20% were as follows: ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017 |
﻿ |  |  |  |  |  |  |  |  |  |  | Number |
﻿ | Fair |  | Gross Unrealized |  |  | of |
﻿ | Value |  | Losses |  | OTTI |  | Securities (1)
﻿Less than six months | $ | 43 |  | $ | 18 |  | $ | - |  |  |  | 17 |
﻿Six months or greater, but less than nine months |  | 15 |  |  | 7 |  |  | - |  |  |  | 8 |
﻿Nine months or greater, but less than twelve months |  | 32 |  |  | 10 |  |  | - |  |  |  | 2 |
﻿Twelve months or greater |  | 229 |  |  | 84 |  |  | 10 |  |  |  | 50 |
﻿Total | $ | 319 |  | $ | 119 |  | $ | 10 |  |  |  | 77 |
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016 |
﻿ |  |  |  |  |  |  |  |  |  |  | Number |
﻿ | Fair |  | Gross Unrealized |  |  | of |
﻿ | Value |  | Losses |  | OTTI |  | Securities (1)
﻿Less than six months | $ | 174 |  | $ | 52 |  | $ | 2 |  |  |  | 19 |
﻿Nine months or greater, but less than twelve months |  | 1 |  |  | 1 |  |  | - |  |  |  | 2 |
﻿Twelve months or greater |  | 364 |  |  | 167 |  |  | 10 |  |  |  | 62 |
﻿Total | $ | 539 |  | $ | 220 |  | $ | 12 |  |  |  | 83 |
﻿
| (1) |  | We may reflect a security in more than one aging category based on various purchase dates.
﻿ We regularly review our investment holdings for OTTI. Our gross unrealized losses, including the portion of OTTI recognized in OCI, on AFS securities decreased by $634 million for the nine months ended September 30, 2017. As discussed further below, we believe the unrealized loss position as of September 30, 2017, did not represent OTTI as (i) we did not intend to sell these fixed maturity AFS securities; (ii) it is not more likely than not that we will be required to sell these fixed maturity AFS securities before recovery of their amortized cost basis; (iii) the estimated future cash flows were equal to or greater than the amortized cost basis of the debt securities; and (iv) we had the ability and intent to hold the equity AFS securities for a period of time sufficient for recovery. ﻿ Based upon this evaluation as of September 30, 2017, management believes we have the ability to generate adequate amounts of cash from our normal operations (e.g., insurance premiums and fees and investment income) to meet cash requirements with a prudent margin of safety without requiring the sale of our temporarily-impaired securities. ﻿ As of September 30, 2017, the unrealized losses associated with our corporate bond securities were attributable primarily to widening credit spreads and rising interest rates since purchase. We performed a detailed analysis of the financial performance of the underlying issuers and determined that we expected to recover the entire amortized cost for each temporarily-impaired security. ﻿ As of September 30, 2017, the unrealized losses associated with our mortgage-backed securities (“MBS”) and ABS were attributable primarily to widening credit spreads and rising interest rates since purchase. We assessed for credit impairment using a cash flow model that incorporates key assumptions including default rates, severities and prepayment rates. We estimated losses for a security by forecasting the underlying loans in each transaction. The forecasted loan performance was used to project cash flows to the various tranches in the structure, as applicable. Our forecasted cash flows also considered, as applicable, independent industry analyst reports and forecasts and other independent market data. Based upon our assessment of the expected credit losses of the security given the performance of the underlying collateral compared to our subordination or other credit enhancement, we expected to recover the entire amortized cost of each temporarily-impaired security. ﻿ As o f September 30, 2017, the unrealized losses associated with our hybrid and redeemable preferred securities were attributable primarily to wider credit spreads caused by illiquidity in the market and subordination within the capital structure, as well as credit risk of underlying issuers. For our hybrid and redeemable preferred securities, we evaluated the financial performance of the underlying issuers based upon credit performance and investment ratings and determined that we expected to recover the entire amortized cost of each temporarily-impaired security. ﻿ Changes in the amount of credit loss of OTTI recognized in net income (loss) where the portion related to other factors was recognized in OCI (in millions) on fixed maturity AFS securities were as follows: ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | For the Three |  | For the Nine |
﻿ | Months Ended |  | Months Ended |
﻿ | September 30, |  | September 30, |
﻿ | 2017 |  | 2016 |  | 2017 |  | 2016 |
﻿Balance as of beginning-of-period | $ | 390 |  | $ | 431 |  | $ | 430 |  | $ | 382 |
﻿Increases attributable to: |  |  |  |  |  |  |  |  |  |  |  |
﻿Credit losses on securities for which an |  |  |  |  |  |  |  |  |  |  |  |
﻿OTTI was not previously recognized |  | 8 |  |  | 6 |  |  | 13 |  |  | 67 |
﻿Credit losses on securities for which an |  |  |  |  |  |  |  |  |  |  |  |
﻿OTTI was previously recognized |  | 1 |  |  | 5 |  |  | 4 |  |  | 12 |
﻿Decreases attributable to: |  |  |  |  |  |  |  |  |  |  |  |
﻿Securities sold, paid down or matured |  | (21 | ) |  | (6 | ) |  | (69 | ) |  | (25 | )
﻿Balance as of end-of-period | $ | 378 |  | $ | 436 |  | $ | 378 |  | $ | 436 |
﻿ During the nine months ended September 30, 2017 and 2016, we recorded credit losses on securities for which an OTTI was not previously recognized as we determined the cash flows expected to be collected would not be sufficient to recover the entire amortized cost basis of the debt security. The credit losses we recorded on securities for which an OTTI was not previously recognized were attributable primarily to one or a combination of the following reasons: ﻿
| · |  | Failure of the issuer of the security to make scheduled payments;
| · |  | Deterioration of creditworthiness of the issuer;
| · |  | Deterioration of conditions specifically related to the security;
| · |  | Deterioration of fundamentals of the industry in which the issuer operates; and
| · |  | Deterioration of the rating of the security by a rating agency.
﻿ We recognize the OTTI attributed to the noncredit portion as a separate component in OCI referred to as unrealized OTTI on AFS securities. ﻿ Details of the amount of credit loss of OTTI recognized in net income (loss) for which a portion related to other factors was recognized in OCI (in millions), were as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017 |
﻿ |  |  |  | Net |  |  |  |  |  |
﻿ |  |  |  | Unrealized |  |  |  |  | OTTI in |
﻿ | Amortized |  | Gain/(Loss) |  | Fair |  | Credit |
﻿ | Cost |  | Position |  | Value |  | Losses |
﻿Corporate bonds | $ | 20 |  | $ | 5 |  | $ | 25 |  | $ | 32 |
﻿ABS |  | 193 |  |  | 23 |  |  | 216 |  |  | 111 |
﻿RMBS |  | 275 |  |  | 22 |  |  | 297 |  |  | 188 |
﻿CMBS |  | 15 |  |  | 3 |  |  | 18 |  |  | 39 |
﻿CLOs |  | 11 |  |  | 4 |  |  | 15 |  |  | 5 |
﻿State and municipal bonds |  | - |  |  | - |  |  | - |  |  | 3 |
﻿Total | $ | 514 |  | $ | 57 |  | $ | 571 |  | $ | 378 |
﻿ ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016 |
﻿ |  |  |  | Net |  |  |  |  |  |
﻿ |  |  |  | Unrealized |  |  |  |  | OTTI in |
﻿ | Amortized |  | Gain/(Loss) |  | Fair |  | Credit |
﻿ | Cost |  | Position |  | Value |  | Losses |
﻿Corporate bonds | $ | 80 |  | $ | 5 |  | $ | 85 |  | $ | 77 |
﻿ABS |  | 212 |  |  | 13 |  |  | 225 |  |  | 112 |
﻿RMBS |  | 332 |  |  | 6 |  |  | 338 |  |  | 194 |
﻿CMBS |  | 29 |  |  | 1 |  |  | 30 |  |  | 39 |
﻿CLOs |  | 11 |  |  | 4 |  |  | 15 |  |  | 5 |
﻿State and municipal bonds |  | 2 |  |  | - |  |  | 2 |  |  | 3 |
﻿Total | $ | 666 |  | $ | 29 |  | $ | 695 |  | $ | 430 |
﻿ Mortgage Loans on Real Estate ﻿ See Note 1 in our 2016 Form 10-K for information regarding our accounting policy relating to mortgage loans on real estate. ﻿ Mortgage loans on real estate principally involve commercial real estate. The commercial loans are geographically diversified throughout the U.S. with the largest concentrations in California, which accounted for 21% and 20% of mortgage loans on real estate as of September 30, 2017, and December 31, 2016, respectively, and Texas which accounted for 11% of mortgage loans as of September 30, 2017, and December 31, 2016. ﻿ The following provides the current and past due composition of our mortgage loans on real estate (in millions): ﻿
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ |  | As of |  |  | As of |
﻿ | September 30, | December 31,
﻿ |  | 2017 |  |  | 2016 |
﻿Current |  | $ | 10,378 |  |  | $ | 9,888 |
﻿60 to 90 days past due |  |  | - |  |  |  | - |
﻿Greater than 90 days past due |  |  | 6 |  |  |  | 2 |
﻿Valuation allowance associated with impaired mortgage loans on real estate |  |  | (2 | ) |  |  | (2 | )
﻿Unamortized premium (discount) |  |  | - |  |  |  | 1 |
﻿Total carrying value |  | $ | 10,382 |  |  | $ | 9,889 |
﻿ The number of impaired mortgage loans on real estate, each of which had an associated specific valuation allowance, and the carrying value of impaired mortgage loans on real estate (dollars in millions) were as follows: ﻿
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ |  | As of |  |  | As of |
﻿ | September 30, | December 31,
﻿ |  | 2017 |  |  | 2016 |
﻿Number of impaired mortgage loans on real estate |  | 2 |  |  | 2 |
﻿ |  |  |  |  |  |  |  |
﻿Principal balance of impaired mortgage loans on real estate |  | $ | 7 |  |  | $ | 7 |
﻿Valuation allowance associated with impaired mortgage loans on real estate |  |  | (2 | ) |  |  | (2 | )
﻿Carrying value of impaired mortgage loans on real estate |  | $ | 5 |  |  | $ | 5 |
﻿ The changes in the valuation allowance associated with impaired mortgage loans on real estate (in millions) were as follows: ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | For the Three |  | For the Nine |
﻿ |  | Months Ended |  | Months Ended |
﻿ |  | September 30, |  | September 30, |
﻿ |  | 2017 |  |  | 2016 |  | 2017 |  | 2016 |
﻿Balance as of beginning-of-period |  | $ | 2 |  |  | $ | 2 |  | $ | 2 |  | $ | 2 |
﻿Additions |  |  | - |  |  |  | 1 |  |  | - |  |  | 1 |
﻿Charge-offs, net of recoveries |  |  | - |  |  |  | - |  |  | - |  |  | - |
﻿Balance as of end-of-period |  | $ | 2 |  |  | $ | 3 |  | $ | 2 |  | $ | 3 |
﻿ Additional information related to impaired mortgage loans on real estate (in millions) was as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | For the Three |  | For the Nine |
﻿ | Months Ended |  | Months Ended |
﻿ | September 30, |  | September 30, |
﻿ | 2017 |  | 2016 |  | 2017 |  | 2016 |
﻿Average carrying value for impaired mortgage loans on real estate | $ | 5 |  | $ | 8 |  | $ | 5 |  | $ | 6 |
﻿Interest income recognized on impaired mortgage loans on real estate |  | - |  |  | - |  |  | - |  |  | - |
﻿Interest income collected on impaired mortgage loans on real estate |  | - |  |  | - |  |  | - |  |  | - |
﻿ As described in Note 1 in our 2016 Form 10-K, we use the loan-to-value and debt-service coverage ratios as credit quality indicators for our mortgage loans, which were as follows (dollars in millions): ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017 |  | As of December 31, 2016 |
﻿ |  |  |  |  |  | Debt- |  |  |  |  |  |  | Debt- |
﻿ |  |  |  |  |  | Service |  |  |  |  |  |  | Service |
﻿ | Carrying |  | % of |  | Coverage |  | Carrying |  | % of |  | Coverage |
﻿Loan-to-Value Ratio | Value |  | Total |  | Ratio |  | Value |  | Total |  | Ratio |
﻿Less than 65% | $ | 9,243 |  | 89.0% |  | 2.25 |  | $ | 8,709 |  | 88.0% |  | 2.16 |
﻿65% to 74% |  | 1,002 |  | 9.6% |  | 1.92 |  |  | 1,009 |  | 10.2% |  | 1.87 |
﻿75% to 100% |  | 132 |  | 1.3% |  | 0.87 |  |  | 166 |  | 1.7% |  | 0.82 |
﻿Greater than 100% |  | 5 |  | 0.1% |  | 1.04 |  |  | 5 |  | 0.1% |  | 1.04 |
﻿Total mortgage loans on real estate | $ | 10,382 |  | 100.0% |  |  |  | $ | 9,889 |  | 100.0% |  |  |
﻿ Alternative Investments ﻿ As of September 30, 2017, and December 31, 201 6, alternative investments included investments in 216 and 206 different partnerships, respectively, and the portfolios represented approximately 1% of our overall invested assets. ﻿ Realized Gain (Loss) Related to Certain Investments ﻿ The detail of the realized gain (loss) related to certain investments (in millions) was as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | For the Three |  | For the Nine |
﻿ | Months Ended |  | Months Ended |
﻿ | September 30, |  | September 30, |
﻿ | 2017 |  | 2016 |  | 2017 |  | 2016 |
﻿Fixed maturity AFS securities: (1) |  |  |  |  |  |  |  |  |  |  |  |
﻿Gross gains | $ | 7 |  | $ | 2 |  | $ | 19 |  | $ | 64 |
﻿Gross losses |  | (22 | ) |  | (37 | ) |  | (47 | ) |  | (200 | )
﻿Equity AFS securities: |  |  |  |  |  |  |  |  |  |  |  |
﻿Gross gains |  | 1 |  |  | 4 |  |  | 2 |  |  | 6 |
﻿Gross losses |  | - |  |  | - |  |  | - |  |  | (1 | )
﻿Gain (loss) on other investments |  | - |  |  | (4 | ) |  | (6 | ) |  | (67 | )
﻿Associated amortization of DAC, VOBA, DSI and DFEL |  |  |  |  |  |  |  |  |  |  |  |
﻿and changes in other contract holder funds |  | (5 | ) |  | (7 | ) |  | (17 | ) |  | (15 | )
﻿Total realized gain (loss) related to certain investments, pre-tax | $ | (19 | ) | $ | (42 | ) | $ | (49 | ) | $ | (213 | )
﻿
| (1) |  | These amounts are represented net of related fair value hedging activity. See Note 5 for more information.
Details underlying write-downs taken as a result of OTTI (in millions) that were recognized in net income (loss) and included in realized gain (loss) on AFS securities above, and the portion of OTTI recognized in OCI (in millions) were as follows: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ | For the Three |  | For the Nine |
﻿ | Months Ended |  | Months Ended |
﻿ | September 30, |  | September 30, |
﻿ | 2017 |  | 2016 |  | 2017 |  | 2016 |
﻿OTTI Recognized in Net Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |
﻿Fixed maturity securities: |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | (8 | ) | $ | (6 | ) | $ | (13 | ) | $ | (68 | )
﻿ABS |  | (1 | ) |  | (1 | ) |  | (2 | ) |  | (4 | )
﻿RMBS |  | - |  |  | (3 | ) |  | (1 | ) |  | (6 | )
﻿CMBS |  | - |  |  | (1 | ) |  | - |  |  | (1 | )
﻿State and municipal bonds |  | - |  |  | - |  |  | (1 | ) |  | - |
﻿Total fixed maturity securities |  | (9 | ) |  | (11 | ) |  | (17 | ) |  | (79 | )
﻿Equity securities |  | - |  |  | - |  |  | - |  |  | (1 | )
﻿Gross OTTI recognized in net income (loss) |  | (9 | ) |  | (11 | ) |  | (17 | ) |  | (80 | )
﻿Associated amortization of DAC, VOBA, DSI and DFEL |  | 1 |  |  | (2 | ) |  | 1 |  |  | 4 |
﻿Net OTTI recognized in net income (loss), pre-tax | $ | (8 | ) | $ | (13 | ) | $ | (16 | ) | $ | (76 | )
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿Portion of OTTI Recognized in OCI |  |  |  |  |  |  |  |  |  |  |  |
﻿Gross OTTI recognized in OCI | $ | 1 |  | $ | 12 |  | $ | 1 |  | $ | 48 |
﻿Change in DAC, VOBA, DSI and DFEL |  | - |  |  | (3 | ) |  | - |  |  | (11 | )
﻿Net portion of OTTI recognized in OCI, pre-tax | $ | 1 |  | $ | 9 |  | $ | 1 |  | $ | 37 |
﻿ Determination of Credit Losses on Corporate Bonds and ABS ﻿ As of September 30, 2017, and December 31, 2016, we reviewed our corporate bond and ABS portfolios for potential shortfall in contractual principal and interest based on numerous subjective and objective inputs. The factors used to determine the amount of credit loss for each individual security, include, but are not limited to, near term risk, substantial discrepancy between book and market value, sector or company-specific volatility, negative operating trends and trading levels wider than peers. ﻿ Credit ratings express opinions about the credit quality of a security. Securities rated investment grade, that is those rated BBB- or higher by Standard & Poor’s (“S&P”) Rating Services or Baa3 or higher by Moody’s Investors Service (“Moody’s”), are generally considered by the rating agencies and market participants to be low credit risk. As of September 30, 2017, and December 31, 2016, 96% and 95%, respectively, of the fair value of our corporate bond portfolio was rated investment grade. As of September 30, 2017, and December 31, 2016, the portion of our corporate bond portfolio rated below investment grade had an amortized cost of $3.3 billion and $3.8 billion, respectively, and a fair value of $3.3 billion and $3.7 billion, respectively. As of September 30, 2017, and December 31, 201 6, 96% of the fair value of our ABS portfolio was rated investment grade. As of September 30, 2017, and December 31, 2016, the portion of our ABS portfolio rated below investment grade had an amortized cost of $86 million and $91 million, respectively, and a fair value of $73 million and $75 million, respectively. Based upon the analysis discussed above, we believe as of September 30, 2017, and December 31, 2016, that we would recover the amortized cost of each fixed maturity security. ﻿ Determination of Credit Losses on MBS ﻿ As of September 30, 2017, and December 31, 2016, default rates were projected by considering underlying MBS loan performance and collateral type. Projected default rates on existing delinquencies vary between 10% to 100% depending on loan type and severity of delinquency status. In addition, we estimate the potential contributions of currently performing loans that may become delinquent in the future based on the change in delinquencies and loan liquidations experienced in the recent history. Finally, we develop a default rate timing curve by aggregating the defaults for all loans in the pool (delinquent loans, foreclosure and real estate owned and new delinquencies from currently performing loans) and the associated loan-level loss severities. ﻿ We use certain available loan characteristics such as lien status, loan sizes and occupancy to estimate the loss severity of loans. Second lien loans are assigned 100% severity, if defaulted. For first lien loans, we assume a minimum of 30% severity with higher severity assumed for investor properties and further adjusted by housing price assumptions. With the default rate timing curve and loan-level loss severity, we derive the future expected credit losses. ﻿ Payables for Collateral on Investments ﻿ The carrying value of the payables for collateral on investments (in millions) included on our Consolidated Balance Sheets and the fair value of the related investments or collateral consisted of the following: ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |
﻿ | As of September 30, 2017 |  | As of December 31, 2016 |
﻿ | Carrying |  | Fair |  | Carrying |  | Fair |
﻿ | Value |  | Value |  | Value |  | Value |
﻿Collateral payable for derivative investments (1) | $ | 935 |  | $ | 935 |  | $ | 894 |  | $ | 894 |
﻿Securities pledged under securities lending agreements (2) |  | 200 |  |  | 192 |  |  | 216 |  |  | 209 |
﻿Securities pledged under repurchase agreements (3) |  | 533 |  |  | 591 |  |  | 535 |  |  | 589 |
﻿Investments pledged for Federal Home Loan Bank of |  |  |  |  |  |  |  |  |  |  |  |
﻿Indianapolis (“FHLBI”) (4) |  | 3,300 |  |  | 4,973 |  |  | 3,350 |  |  | 4,947 |
﻿Total payables for collateral on investments | $ | 4,968 |  | $ | 6,691 |  | $ | 4,995 |  | $ | 6,639 |
﻿
| (1) |  | We obtain collateral based upon contractual provisions with our counterparties. These agreements take into consideration the counterparties’ credit rating as compared to ours, the fair value of the derivative investments and specified thresholds that if exceeded result in the receipt of cash that is typically invested in cash and invested cash. See Note 5 for additional information.
| (2) |  | Our pledged securities under securities lending agreements are included in fixed maturity AFS securities on our Consolidated Balance Sheets. We generally obtain collateral in an amount equal to 102% and 105% of the fair value of the domestic and foreign securities, respectively. We value collateral daily and obtain additional collateral when deemed appropriate. The cash received in our securities lending program is typically invested in cash and invested cash or fixed maturity AFS securities.
| (3) |  | Our pledged securities under repurchase agreements are included in fixed maturity AFS securities on our Consolidated Balance Sheets. We obtain collateral in an amount equal to 95% of the fair value of the securities, and our agreements with third parties contain contractual provisions to allow for additional collateral to be obtained when necessary. The cash received in our repurchase program is typically invested in fixed maturity AFS securities.
| (4) |  | Our pledged investments for FHLBI are included in fixed maturity AFS securities and mortgage loans on real estate on our Consolidated Balance Sheets. The collateral requirements are generally 105% to 115% of the fair value for fixed maturity AFS securities and 155% to 175% of the fair value for mortgage loans on real estate. The cash received in these transactions is primarily invested in cash and invested cash or fixed maturity AFS securities.
﻿ Increase (decrease) in payables for collateral on investments (in millions) consisted of the following: ﻿
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿ |  | For the Nine |
﻿ |  | Months Ended |
﻿ |  | September 30, |
﻿ |  | 2017 |  | 2016 |
﻿Collateral payable for derivative investments |  | $ | 41 |  | $ | 995 |
﻿Securities pledged under securities lending agreements |  |  | (16 | ) |  | (3 | )
﻿Securities pledged under repurchase agreements |  |  | (2 | ) |  | 110 |
﻿Investments pledged for FHLBI |  |  | (50 | ) |  | (105 | )
﻿Total increase (decrease) in payables for collateral on investments |  | $ | (27 | ) | $ | 997 |
﻿ ﻿ We have elected not to offset our repurchase agreements and securities lending transactions in our financial statements. The remaining contractual maturities of repurchase agreements and securities lending transactions accounted for as secured borrowings were as follows: ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |
﻿ | As of September 30, 2017 |
﻿ | Overnight and Continuous |  | Up to 30 Days |  | 30 - 90 Days |  | Greater Than 90 Days |  | Total |
﻿Repurchase Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | - |  | $ | 100 |  | $ | 283 |  | $ | 150 |  | $ | 533 |
﻿Total |  | - |  |  | 100 |  |  | 283 |  |  | 150 |  |  | 533 |
﻿Securities Lending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  | 200 |  |  | - |  |  | - |  |  | - |  |  | 200 |
﻿Total |  | 200 |  |  | - |  |  | - |  |  | - |  |  | 200 |
﻿Total gross secured borrowings | $ | 200 |  | $ | 100 |  | $ | 283 |  | $ | 150 |  | $ | 733 |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016 |
﻿ | Overnight and Continuous |  | Up to 30 Days |  | 30 - 90 Days |  | Greater Than 90 Days |  | Total |
﻿Repurchase Agreements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds | $ | - |  | $ | - |  | $ | 389 |  | $ | 146 |  | $ | 535 |
﻿Total |  | - |  |  | - |  |  | 389 |  |  | 146 |  |  | 535 |
﻿Securities Lending |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Corporate bonds |  | 212 |  |  | - |  |  | - |  |  | - |  |  | 212 |
﻿Foreign government bonds |  | 4 |  |  | - |  |  | - |  |  | - |  |  | 4 |
﻿Total |  | 216 |  |  | - |  |  | - |  |  | - |  |  | 216 |
﻿Total gross secured borrowings | $ | 216 |  | $ | - |  | $ | 389 |  | $ | 146 |  | $ | 751 |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ We accept collateral in the form of securities in connection with repurchase agreements. In instances where we are permitted to sell or re-pledge the securities received, we report the fair value of the collateral received and a related obligation to return the collateral in the financial statements. In addition, we receive securities in connection with securities borrowing agreements, which we are permitted to sell or re-pledge. As of September 30, 2017, the fair value of all collateral received that we are permitted to sell or re-pledge was $175 million. As of September 30, 2017, we have re-pledged $53 million of this collateral to cover initial margin on certain derivative investments. ﻿ Investment Commitments ﻿ As of September 30, 2017, our investment commitments were $1.6 billion, which included $801 million of LPs, $328 million of mortgage loans on real estate and $475 million of private placement securities. ﻿ Concentrations of Financial Instruments ﻿ As of September 30, 2017, and December 31, 2016, our most significant investments in one issuer were our investments in securities issued by the Federal Home Loan Mortgage Corporation with a fair value of $1.3 billion and $1.5 billion, respectively, or 1% of our invested assets portfolio, and our investments in securities issued by Federal National Mortgage Association with a fair value of $1.0 billion and $1.1 billion, respectively, or 1% of our invested assets portfolio. These concentrations include both AFS and trading securities. ﻿ As of September 30, 2017, and December 31, 2016, our most significant investments in one industry were our investment s in securities in the consumer non-cyclical industry with a fair value of $14.9 billion and $13.7 billion, respectively, or 13% of our invested assets portfolio, and our investment s in securities in the utilities industry with a fair value of $14.0 billion and $13.2 billion, respectively, or 13% and 12%, respectively, of our invested assets portfolio. These concentrations include both AFS and trading securities. ﻿

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