CONTINGENCIES, COMMITMENTS AND GUARANTEES (Details - Guarantor Obligations) $ in Millions	Dec. 31, 2017 USD ($)
Guarantor Obligations [Line Items]
Amount outstanding under standby letters of credit at end of period	$ 139

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.

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration