NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent account developments (Details) - Pro Forma - Accounting Standards Update 2016-13 - USD ($) $ in Millions	Jun. 30, 2020	Jan. 01, 2020
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for estimated losses on loans or leases	$ 4	$ 4
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for estimated losses on loans or leases	$ 6	$ 6

Amount of increase (decrease) of allowance reserve for credit loss.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration