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Fair Value Measurements (Details 4) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | $ 1,231 | $ 1,220 | $ 1,212 | $ 1,343
Mortgage loans |  | 1,097 | 1,067 |  |
Policy loans |  | 198 | 201 |  |
Financial liabilities: |  |  |  |  |
Long-term debt |  | 998 | 998 |  |
Level 1 [Member] |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 1,231 | 1,220 |  |
Mortgage loans |  | 0 | 0 |  |
Policy loans |  | 0 | 0 |  |
Total financial assets not accounted for at fair value |  | 1,231 | 1,220 |  |
Financial liabilities: |  |  |  |  |
Annuity benefits accumulated | [1] | 0 | 0 |  |
Long-term debt |  | 0 | 0 |  |
Total financial liabilities not accounted for at fair value |  | 0 | 0 |  |
Level 2 [Member] |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Mortgage loans |  | 0 | 0 |  |
Policy loans |  | 0 | 0 |  |
Total financial assets not accounted for at fair value |  | 0 | 0 |  |
Financial liabilities: |  |  |  |  |
Annuity benefits accumulated | [1] | 0 | 0 |  |
Long-term debt |  | 1,110 | 1,105 |  |
Total financial liabilities not accounted for at fair value |  | 1,110 | 1,105 |  |
Level 3 [Member] |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Mortgage loans |  | 1,108 | 1,074 |  |
Policy loans |  | 198 | 201 |  |
Total financial assets not accounted for at fair value |  | 1,306 | 1,275 |  |
Financial liabilities: |  |  |  |  |
Annuity benefits accumulated | [1] | 27,210 | 25,488 |  |
Long-term debt |  | 15 | 15 |  |
Total financial liabilities not accounted for at fair value |  | 27,225 | 25,503 |  |
Carrying Value [Member] |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 1,231 | 1,220 |  |
Mortgage loans |  | 1,097 | 1,067 |  |
Policy loans |  | 198 | 201 |  |
Total financial assets not accounted for at fair value |  | 2,526 | 2,488 |  |
Financial liabilities: |  |  |  |  |
Annuity benefits accumulated | [1] | 27,613 | 26,422 |  |
Long-term debt |  | 1,006 | 1,000 |  |
Total financial liabilities not accounted for at fair value |  | 28,619 | 27,422 |  |
Fair Value [Member] |  |  |  |  |
Financial assets: |  |  |  |  |
Cash and cash equivalents |  | 1,231 | 1,220 |  |
Mortgage loans |  | 1,108 | 1,074 |  |
Policy loans |  | 198 | 201 |  |
Total financial assets not accounted for at fair value |  | 2,537 | 2,495 |  |
Financial liabilities: |  |  |  |  |
Annuity benefits accumulated | [1] | 27,210 | 25,488 |  |
Long-term debt |  | 1,125 | 1,120 |  |
Total financial liabilities not accounted for at fair value |  | $ 28,335 | $ 26,608 |  |
[1] | Excludes $199 million and $200 million of life contingent annuities in the payout phase at March 31, 2016 and December 31, 2015, respectively.

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- Definition Amount before allowance of loans made to policy and contract holders using their life insurance contracts' cash value or separate accounts as collateral. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums over and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(e)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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