CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME LOSS [Abstract]
Settlements tax		$ (20)		$ (37)
Change in fair value of derivative instruments tax		$ 1		$ 8
Amortization of prior service cost and net loss included in net periodic pension cost tax			$ 1
Net gain incurred in period tax	$ 1		$ 1