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Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2013
Investment Securities (Tables) [Abstract] |
Schedule of Available for Sale Securities by Type | The following is a summary of investment securities as of December 31:
|  | 2013 |  | 2012
|  |  |  |  | Gross |  | Gross |  | Estimated |  |  |  |  | Gross |  | Gross |  | Estimated
|  |  |  | Unrealized | Unrealized |  | Fair |  |  | Unrealized | Unrealized |  | Fair
Description of Securities (Millions) |  |  | Cost | Gains | Losses |  | Value |  | Cost | Gains | Losses |  | Value
State and municipal obligations |  | $ | 4,060 |  | $ | 54 |  | $ | (79) |  | $ | 4,035 |  | $ | 4,280 |  | $ | 199 |  | $ | (5) |  | $ | 4,474
U.S. Government agency obligations |  |  | 3 |  |  | ― |  |  | ― |  |  | 3 |  |  | 3 |  |  | ― |  |  | ― |  |  | 3
U.S. Government treasury obligations |  |  | 318 |  |  | 3 |  |  | (1) |  |  | 320 |  |  | 330 |  |  | 8 |  |  | ― |  |  | 338
Corporate debt securities |  |  | 43 |  |  | 3 |  |  | ― |  |  | 46 |  |  | 73 |  |  | 6 |  |  | ― |  |  | 79
Mortgage-backed securities (a) |  |  | 160 |  |  | 5 |  |  | (1) |  |  | 164 |  |  | 210 |  |  | 14 |  |  | ― |  |  | 224
Equity securities (b) |  |  | 29 |  |  | 95 |  |  | ― |  |  | 124 |  |  | 64 |  |  | 232 |  |  | ― |  |  | 296
Foreign government bonds and obligations |  |  | 272 |  |  | 5 |  |  | (1) |  |  | 276 |  |  | 134 |  |  | 15 |  |  | ― |  |  | 149
Other (c) |  |  | 50 |  |  | ― |  |  | (2) |  |  | 48 |  |  | 51 |  |  | ― |  |  | ― |  |  | 51
Total |  | $ | 4,935 |  | $ | 165 |  | $ | (84) |  | $ | 5,016 |  | $ | 5,145 |  | $ | 474 |  | $ | (5) |  | $ | 5,614
Represents mortgage-backed securities guaranteed by Fannie Mae, Freddie Mac or Ginnie Mae. Primarily r epr esents the Company's investment in ICBC. Other comprises investments in various mutual funds.
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | The following table provides information about the Company's investment securities with gross unrealized losses and the length of time that individual securities have been in a continuous unrealized loss position as of December 31:
|  |  |  | 2013 |  | 2012
|  | Less than 12 months |  | 12 months or more |  | Less than 12 months |  | 12 months or more
|  |  |  |  |  |  | Gross |  |  |  |  |  | Gross |  |  |  |  | Gross |  |  |  |  | Gross
|  |  |  | Estimated | Unrealized | Estimated | Unrealized |  | Estimated | Unrealized | Estimated | Unrealized
Description of Securities (Millions) |  | Fair Value | Losses | Fair Value | Losses |  | Fair Value | Losses | Fair Value | Losses
State and municipal obligations |  | $ | 1,320 |  | $ | (63) |  | $ | 106 |  | $ | (16) |  | $ | 100 |  | $ | (1) |  | $ | 73 |  | $ | (4)
Foreign government bonds and obligations |  |  | 208 |  |  | (1) |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ―
U.S. Government treasury obligations |  |  | 166 |  |  | (1) |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ―
Mortgage-backed securities |  |  | 35 |  |  | (1) |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ― |  |  | ―
Other |  |  | 30 |  |  | (1) |  |  | 17 |  |  | (1) |  |  | ― |  |  | ― |  |  | ― |  |  | ―
Total |  | $ | 1,759 |  | $ | (67) |  | $ | 123 |  | $ | (17) |  | $ | 100 |  | $ | (1) |  | $ | 73 |  | $ | (4)
Available for Sale Securities Ratio of Fair Value to Amortized Cost | The following table summarizes the gross unrealized losses due to temporary impairments by ratio of fair value to amortized cost as of December 31:
|  | Less than 12 months |  | 12 months or more |  | Total
|  |  |  |  |  | Gross |  |  |  |  |  |  | Gross |  |  |  |  |  |  | Gross
Ratio of Fair Value to |  | Number of | Estimated | Unrealized |  | Number of | Estimated | Unrealized |  | Number of | Estimated | Unrealized
Amortized Cost (Dollars in millions) |  | Securities | Fair Value | Losses |  | Securities | Fair Value | Losses |  | Securities | Fair Value | Losses
2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
90%–100% |  | 228 |  | $ | 1,665 |  | $ | (53) |  | 6 |  | $ | 24 |  | $ | (2) |  | 234 |  | $ | 1,689 |  | $ | (55)
Less than 90% |  | 13 |  |  | 94 |  |  | (14) |  | 5 |  |  | 99 |  |  | (15) |  | 18 |  |  | 193 |  |  | (29)
Total as of December 31, 2013 |  | 241 |  | $ | 1,759 |  | $ | (67) |  | 11 |  | $ | 123 |  | $ | (17) |  | 252 |  | $ | 1,882 |  | $ | (84)
2012: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
90%–100% |  | 46 |  | $ | 100 |  | $ | (1) |  | 4 |  | $ | 73 |  | $ | (4) |  | 50 |  | $ | 173 |  | $ | (5)
Total as of December 31, 2012 |  | 46 |  | $ | 100 |  | $ | (1) |  | 4 |  | $ | 73 |  | $ | (4) |  | 50 |  | $ | 173 |  | $ | (5)
Gross realized gains and losses on the sales of investment securities | Gross realized gains and losses on the sales of investment securities, included in other non-interest revenues, were as follows:
(Millions) |  | 2013 |  | 2012 |  | 2011
Gains |  | $ | 136 |  | $ | 127 |  | $ | 16
Losses |  |  | ― |  |  | (1) |  |  | ―
Total |  | $ | 136 |  | $ | 126 |  | $ | 16
Contractual maturities of investment securities | Contractual maturities of investment securities, excluding equity securities and other securities, as of December 31, 2013 we re as follows:
|  |  |  |  |  | Estimated
(Millions) | Cost | Fair Value
Due within 1 year |  | $ | 505 |  | $ | 505
Due after 1 year but within 5 years |  |  | 489 |  |  | 496
Due after 5 years but within 10 years |  |  | 215 |  |  | 224
Due after 10 years |  |  | 3,647 |  |  | 3,619
Total |  | $ | 4,856 |  | $ | 4,844

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