EQUITY - Reclassifications Out of Accumulated Other Comprehensive Loss (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($)
Stockholders' Equity Note [Abstract]
Actuarial loss and prior service cost	$ (45)	[1]
Tax benefit	7
Total, net of tax	(38)
Currency exchange contracts	(4)
Tax benefit	1
Total, net of tax	(3)
Total reclassifications for the period	$ (41)

[1] These components of Accumulated other comprehensive loss are included in the computation of net periodic benefit cost. See Note 6 for additional information about pension and other postretirement benefits items.