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SECURITIES - Schedule of Investments in Continuous Loss Positions (Details) $ in Millions | Sep. 30, 2018 USD ($) Securities | Dec. 31, 2017 USD ($) Securities
--- | --- | ---
Number of Issues |  |
Less than 12 Months | Securities | 507 | 300
12 Months or Longer | Securities | 170 | 162
Total | Securities | 677 | 462
Fair Value |  |
Less than 12 Months | $ 15,719 | $ 10,218
12 Months or Longer | 7,291 | 8,145
Total | 23,010 | 18,363
Gross Unrealized Losses |  |
Less than 12 Months | (520) | (98)
12 Months or Longer | (494) | (232)
Total | $ (1,014) | $ (330)
Federal agencies and U.S. government sponsored entities |  |
Number of Issues |  |
Less than 12 Months | Securities | 493 | 294
12 Months or Longer | Securities | 159 | 152
Total | Securities | 652 | 446
Fair Value |  |
Less than 12 Months | $ 15,177 | $ 10,163
12 Months or Longer | 7,215 | 8,061
Total | 22,392 | 18,224
Gross Unrealized Losses |  |
Less than 12 Months | (514) | (97)
12 Months or Longer | (488) | (226)
Total | $ (1,002) | $ (323)
Other/non-agency |  |
Number of Issues |  |
Less than 12 Months | Securities | 14 | 6
12 Months or Longer | Securities | 11 | 10
Total | Securities | 25 | 16
Fair Value |  |
Less than 12 Months | $ 542 | $ 55
12 Months or Longer | 76 | 84
Total | 618 | 139
Gross Unrealized Losses |  |
Less than 12 Months | (6) | (1)
12 Months or Longer | (6) | (6)
Total | $ (12) | $ (7)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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