AVAILABLE-FOR-SALE SECURITIES - Collateralized Debt Obligation (Details) - USD ($) $ in Millions |
Jun. 30, 2018 |
Dec. 31, 2017 |
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| Schedule of Available-for-sale Securities [Line Items] | ||
| Unrealized Gross Losses | $ (482) | $ (286) |
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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