DEBT Debt Extinguishment (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Extinguishment of Debt [Line Items]
Debt reductions	[1]	$ 266	$ 90	$ 266	$ 1,479
Write off of deferred debt issuance cost		$ 29	$ 1	$ 29	$ 208

[1] Reductions related to notes with an interest rate of 7.95% and original maturity in 2018 for both the three and nine months ended September 30, 2016, and from 4.75% to 5.85% with original maturities from 2019 to 2030 and from 4.70% to 9.38% with original maturities from 2015 to 2030 for the three and nine months ended September 30, 2015, respectively.