PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Pension Plans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Pension contributions		$ 865,000,000	$ 903,000,000	$ 806,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation		22,565,000,000	24,659,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation		21,554,000,000	23,422,000,000
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets		16,247,000,000	15,458,000,000
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation		23,800,000,000	25,300,000,000
Expected pension contributions	800,000,000
Discount rate - benefit obligations		4.54%	3.88%	4.93%
Rate of increase in future compensation levels - benefit obligations		4.15%	3.96%	4.14%
Discount rate - net periodic costs		3.88%	4.93%	5.38%
Rate of increase in future compensation levels - net periodic costs		3.96%	4.14%	4.16%
Expected long-term rate of return on plan assets - net periodic costs		7.47%	7.60%	7.86%
Defined Benefit Pension Plans, U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligations		4.92%	4.02%	4.98%
Rate of increase in future compensation levels - benefit obligations		4.50%	4.50%	4.50%
Discount rate - net periodic costs		4.02%	4.98%	5.51%
Rate of increase in future compensation levels - net periodic costs		4.50%	4.50%	4.50%
Expected long-term rate of return on plan assets - net periodic costs		7.85%	7.83%	8.18%
Defined Contribution Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense recognized		$ 231,000,000	$ 186,000,000	$ 163,000,000
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Support, Bond Indices		.6
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Support, Bond Indices		.90