PENSION AND POSTRETIREMENT BENEFIT PLANS (Estimated Future Benefit Payments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Pension contributions	$ 118	$ 124	$ 251
Expected future benefit payments, Years 2021-2025	1,700
Defined contribution plan expense	190	$ 190	$ 190
Minimum [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Expected future benefit payments range	300
Maximum [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Expected future benefit payments range	400
Pension Plans, Defined Benefit [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Expected contributions to pension plans	$ 100