VARIABLE INTEREST ENTITIES AND PREFERRED SECURITIES OF SUBSIDIARIES Activity Between Company and Entities Footnotes (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Variable Interest Entity [Line Items] | ||
| Accretion income for amortization of purchase accounting adjustment, financial assets | $ 5 | $ 5 |
| 2007 Financing Entities [Member] | ||
| Variable Interest Entity [Line Items] | ||
| Accretion expense for amortization of purchase accounting adjustment, financial liabiities | $ 2 | $ 2 |