VARIABLE INTEREST ENTITIES AND PREFERRED SECURITIES OF SUBSIDIARIES Narrative (Details) - Variable Interest Entity, Primary Beneficiary [Member] $ in Millions	Mar. 31, 2017 USD ($)
2015 Financing Entities [Member]
Variable Interest Entity [Line Items]
Notes receivable, fair value disclosure	$ 4,740
Long-term debt, fair value	4,290
2007 Financing Entities [Member]
Variable Interest Entity [Line Items]
Notes receivable, fair value disclosure	2,200
Long-term debt, fair value	$ 2,060