VARIABLE INTEREST ENTITIES AND PREFERRED SECURITIES OF SUBSIDIARIES Activity Between Company and Entities Footnotes (Details) - 2007 Financing Entities - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Variable Interest Entity [Line Items]
Accretion income for amortization of purchase accounting adjustment, financial assets	$ 4	$ 4	$ 9	$ 9
Accretion expense for amortization of purchase accounting adjustment, financial liabiities	$ 1	$ 1	$ 3	$ 3