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Investments (Details 4) - USD ($) $ in Millions | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | $ 727 |  | $ 517 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (261) |  | (185) |  |  |
Net |  | 466 | [1] | 332 | [1] | $ 799 | $ 743
Total investments [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | 1,233 |  | 803 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (438) |  | (285) |  |  |
Net |  | 795 |  | 518 |  |  |
Fixed maturities [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | 1,172 |  | 719 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (417) |  | (255) |  |  |
Net |  | 755 |  | 464 |  |  |
Fixed maturities - annuity segment [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax | [2] | 910 |  | 523 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests | [2] | (319) |  | (183) |  |  |
Net | [2] | 591 |  | 340 |  |  |
Fixed maturities - all other [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | 262 |  | 196 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (98) |  | (72) |  |  |
Net |  | 164 |  | 124 |  |  |
Equity securities [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | 61 |  | 84 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (21) |  | (30) |  |  |
Net |  | 40 |  | 54 |  |  |
Deferred policy acquisition costs - annuity segment [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | (400) |  | (233) |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | 140 |  | 82 |  |  |
Net |  | (260) |  | (151) |  |  |
Annuity benefits accumulated [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | (125) |  | (64) |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | 44 |  | 22 |  |  |
Net |  | (81) |  | (42) |  |  |
Life, accident and health reserves [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | (1) |  |  |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | 0 |  |  |  |  |
Net |  | (1) |  |  |  |  |
Unearned revenue [Member] |  |  |  |  |  |  |
Unrealized gain on: |  |  |  |  |  |  |
Pretax |  | 20 |  | 11 |  |  |
Deferred Tax and Amounts Attributable to Noncontrolling Interests |  | (7) |  | (4) |  |  |
Net |  | $ 13 |  | $ 7 |  |  |
[1] | Includes net unrealized gains of $46 million at March 31, 2016 and $51 million at December 31, 2015 related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.
[2] | Unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

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