CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 371	$ 292	$ (5,794)	$ 407
Items related to employee benefit plans:
Change in net actuarial loss, net of ($14), ($11), ($28) and ($22) tax	42	34	85	67
Change in net prior service credit, net of $0, ($1), ($1) and ($2) tax	2	2	3	4
Unrealized holding loss on interest rate swaps, net of $8 and $14 tax	(26)		(43)
Foreign currency translation adjustment and other net of $3, $44, $2 and $30 tax	(8)	(239)	(3)	(160)
Other comprehensive income (loss)	10	(203)	42	(89)
COMPREHENSIVE INCOME (LOSS)	$ 381	$ 89	$ (5,752)	$ 318