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v3.3.1.900

Investment Securities (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Available for Sale Securities by Type |  |  |
Cost | $ 3,668 | $ 4,280 |
Gross Unrealized Gains | 100 | 154 |
Gross Unrealized Losses | (9) | (3) |
Estimated Fair Value | 3,759 | 4,431 | $ 0
State and municipal obligations [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 2,813 | 3,366 |
Gross Unrealized Gains | 85 | 129 |
Gross Unrealized Losses | (5) | (2) |
Estimated Fair Value | 2,893 | 3,493 | 0
U.S. Government agency obligations [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 2 | 3 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | 0 | 0 |
Estimated Fair Value | 2 | 3 | 0
U.S. Government treasury obligations [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 406 | 346 |
Gross Unrealized Gains | 4 | 4 |
Gross Unrealized Losses | (1) | 0 |
Estimated Fair Value | 409 | 350 | 0
Corporate debt securities [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 29 | 37 |
Gross Unrealized Gains | 1 | 3 |
Gross Unrealized Losses | 0 | 0 |
Estimated Fair Value | 30 | 40 | 0
Mortgage-backed securities [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 117 | 128 |
Gross Unrealized Gains | 4 | 8 |
Gross Unrealized Losses | 0 | 0 |
Estimated Fair Value | 121 | 136 | 0
Equity securities [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 1 | 0 |
Gross Unrealized Gains | 0 | 1 |
Gross Unrealized Losses | 0 | 0 |
Estimated Fair Value | 1 | 1 | 0
Foreign government bonds and obligations [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 250 | 350 |
Gross Unrealized Gains | 6 | 9 |
Gross Unrealized Losses | (1) | 0 |
Estimated Fair Value | 255 | 359 | 0
Other [Member] |  |  |
Schedule of Available for Sale Securities by Type |  |  |
Cost | 50 | 50 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (2) | (1) |
Estimated Fair Value | $ 48 | $ 49 | $ 0

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