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Investments (Details 11) $ in Millions | Jun. 30, 2017 USD ($) security contract | Dec. 31, 2016 USD ($) security contract
--- | --- | ---
Fixed income and equity securities |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 1,895 | 2,590
Fair value, continuous unrealized loss position for less than 12 months | $ 13,809 | $ 18,572
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (180) | $ (407)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 255 | 334
Fair value, continuous unrealized loss position for 12 months or more | $ 534 | $ 1,087
Unrealized losses, continuous unrealized loss position for 12 months or more | (69) | (125)
Total unrealized losses |  |
Total unrealized losses | $ (249) | $ (532)
Fixed income securities |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 1,758 | 2,395
Fair value, continuous unrealized loss position for less than 12 months | $ 13,262 | $ 17,918
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (146) | $ (351)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 242 | 288
Fair value, continuous unrealized loss position for 12 months or more | $ 491 | $ 922
Unrealized losses, continuous unrealized loss position for 12 months or more | (62) | (96)
Total unrealized losses |  |
Total unrealized losses | $ (208) | $ (447)
U.S. government and agencies |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 62 | 46
Fair value, continuous unrealized loss position for less than 12 months | $ 1,840 | $ 943
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (7) | $ (9)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 0 | 0
Fair value, continuous unrealized loss position for 12 months or more | $ 0 | $ 0
Unrealized losses, continuous unrealized loss position for 12 months or more | 0 | 0
Total unrealized losses |  |
Total unrealized losses | $ (7) | $ (9)
Municipal |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 903 | 1,310
Fair value, continuous unrealized loss position for less than 12 months | $ 1,842 | $ 3,073
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (20) | $ (76)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 4 | 8
Fair value, continuous unrealized loss position for 12 months or more | $ 14 | $ 29
Unrealized losses, continuous unrealized loss position for 12 months or more | (4) | (11)
Total unrealized losses |  |
Total unrealized losses | $ (24) | $ (87)
Corporate |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 615 | 862
Fair value, continuous unrealized loss position for less than 12 months | $ 8,649 | $ 13,343
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (109) | $ (256)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 44 | 83
Fair value, continuous unrealized loss position for 12 months or more | $ 358 | $ 678
Unrealized losses, continuous unrealized loss position for 12 months or more | (41) | (63)
Total unrealized losses |  |
Total unrealized losses | $ (150) | $ (319)
Foreign government |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 57 | 41
Fair value, continuous unrealized loss position for less than 12 months | $ 625 | $ 225
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (6) | $ (4)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 0 | 0
Fair value, continuous unrealized loss position for 12 months or more | $ 0 | $ 0
Unrealized losses, continuous unrealized loss position for 12 months or more | 0 | 0
Total unrealized losses |  |
Total unrealized losses | $ (6) | $ (4)
Asset-backed securities (“ABS”) |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 35 | 31
Fair value, continuous unrealized loss position for less than 12 months | $ 242 | $ 222
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (1) | $ (1)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 10 | 14
Fair value, continuous unrealized loss position for 12 months or more | $ 39 | $ 109
Unrealized losses, continuous unrealized loss position for 12 months or more | (9) | (10)
Total unrealized losses |  |
Total unrealized losses | $ (10) | $ (11)
Residential mortgage-backed securities (“RMBS”) |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 79 | 89
Fair value, continuous unrealized loss position for less than 12 months | $ 41 | $ 53
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (1) | $ (1)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 179 | 179
Fair value, continuous unrealized loss position for 12 months or more | $ 66 | $ 91
Unrealized losses, continuous unrealized loss position for 12 months or more | (3) | (7)
Total unrealized losses |  |
Total unrealized losses | $ (4) | $ (8)
Commercial mortgage-backed securities (“CMBS”) |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 6 | 15
Fair value, continuous unrealized loss position for less than 12 months | $ 23 | $ 59
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (2) | $ (4)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 5 | 4
Fair value, continuous unrealized loss position for 12 months or more | $ 14 | $ 15
Unrealized losses, continuous unrealized loss position for 12 months or more | (5) | (5)
Total unrealized losses |  |
Total unrealized losses | $ (7) | $ (9)
Redeemable preferred stock |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | security | 1 | 1
Fair value, continuous unrealized loss position for less than 12 months | $ 0 | $ 0
Unrealized losses, continuous unrealized loss position for less than 12 months | $ 0 | $ 0
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | security | 0 | 0
Fair value, continuous unrealized loss position for 12 months or more | $ 0 | $ 0
Unrealized losses, continuous unrealized loss position for 12 months or more | 0 | 0
Total unrealized losses |  |
Total unrealized losses | $ 0 | $ 0
Investment grade fixed income securities |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 1,655 | 2,202
Fair value, continuous unrealized loss position for less than 12 months | $ 12,373 | $ 15,678
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (124) | $ (293)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 183 | 201
Fair value, continuous unrealized loss position for 12 months or more | $ 295 | $ 493
Unrealized losses, continuous unrealized loss position for 12 months or more | (31) | (51)
Total unrealized losses |  |
Total unrealized losses | $ (155) | $ (344)
Below investment grade fixed income securities |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 103 | 193
Fair value, continuous unrealized loss position for less than 12 months | $ 889 | $ 2,240
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (22) | $ (58)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 59 | 87
Fair value, continuous unrealized loss position for 12 months or more | $ 196 | $ 429
Unrealized losses, continuous unrealized loss position for 12 months or more | (31) | (45)
Total unrealized losses |  |
Total unrealized losses | $ (53) | $ (103)
Equity securities |  |
Less than 12 months |  |
Number of issues, continuous unrealized loss position for less than 12 months | contract | 137 | 195
Fair value, continuous unrealized loss position for less than 12 months | $ 547 | $ 654
Unrealized losses, continuous unrealized loss position for less than 12 months | $ (34) | $ (56)
12 months or more |  |
Number of issues, continuous unrealized loss position for 12 months or more | contract | 13 | 46
Fair value, continuous unrealized loss position for 12 months or more | $ 43 | $ 165
Unrealized losses, continuous unrealized loss position for 12 months or more | (7) | (29)
Total unrealized losses |  |
Total unrealized losses | $ (41) | $ (85)

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