Fair Value Measurements (Details 4) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Proceeds from the sale of investments in available-for-sale securities, realized gains and losses on those sales, and interest and dividend income | ||||
| Sales Proceeds | $ 337 | $ 307 | $ 1,361 | $ 1,126 |
| Realized Gains | 36 | 33 | 131 | 135 |
| Realized Losses | (15) | (32) | (88) | (121) |
| OTTI | (3) | (46) | (13) | (70) |
| Interest and Dividend Income | 27 | 25 | 75 | 75 |
| FES | ||||
| Proceeds from the sale of investments in available-for-sale securities, realized gains and losses on those sales, and interest and dividend income | ||||
| Sales Proceeds | 135 | 127 | 576 | 503 |
| Realized Gains | 23 | 28 | 90 | 98 |
| Realized Losses | (6) | (24) | (49) | (79) |
| OTTI | (3) | (41) | (12) | (63) |
| Interest and Dividend Income | $ 16 | $ 14 | $ 42 | $ 43 |