NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent account developments (Details) - Pro Forma - Accounting Standards Update 2016-13 - USD ($) $ in Millions	Sep. 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	$ 3	$ 3
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in allowance for estimated losses on loans or leases	$ 8	$ 8