VARIABLE INTEREST ENTITIES AND PREFERRED SECURITIES OF SUBSIDIARIES Activity Between Company and Entities Footnotes (Details) - 2007 Financing Entities - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Variable Interest Entity [Line Items]
Accretion income for amortization of purchase accounting adjustment, financial assets	$ 5	$ 5
Accretion expense for amortization of purchase accounting adjustment, financial liabiities	$ 2	$ 2