RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - POSTRETIREMENT AND OTHER BENEFIT PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
PLANS POSTRETIREMENT AND OTHER BENEFIT
Total benefit costs including postretirement costs	$ 182	$ 200	$ 215