PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Other Postretirement Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Tax			$ 10
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.00%	4.26%	3.90%
Discount rate - net periodic costs	4.26%	3.90%	4.75%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.88%	4.08%	3.75%
Discount rate - net periodic costs	4.08%	3.75%	4.40%
Defined benefit plan, Initial health care cost trend rate - benefit obligations	7.00%	7.25%	7.05%
Initial health care cost trend rate - net periodic costs	7.25%	7.05%	7.46%
Defined benefit plan, Ultimate health care cost trend rate - benefit obligations	5.00%	5.00%	5.00%
Ultimate health care cost trend rate - net periodic costs	5.00%	5.00%	5.00%
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate - benefit obligations	2025	2025	2020
Defined Benefit Plan, Year that Rate Reaches Ultimate Trend Rate - net periodic costs	2025	2020	2020
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	$ 4
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$ 5