PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Defined Benefit Pension Plans) (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Pension contributions		$ 1,676
Expected pension contributions	$ 500	$ 500
Discount rate - benefit obligations	3.17%	3.17%	3.52%
Discount rate - net periodic costs		3.52%	3.85%	3.60%
Rate of compensation increase - benefit obligations	3.88%	3.88%	3.90%
Rate of compensation increase - net periodic costs		3.90%	4.04%	4.13%
Expected return on plan assets - net periodic costs		7.16%	7.22%	7.35%
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Discount rate - benefit obligations	3.66%	3.66%	4.11%
Discount rate - net periodic costs		4.11%	4.40%	4.04%
Rate of compensation increase - benefit obligations	4.25%	4.25%	4.25%
Rate of compensation increase - net periodic costs		4.25%	4.50%	4.50%
Expected return on plan assets - net periodic costs		7.91%	7.77%	7.85%
Nonqualified Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Change In Control, Payment For Settlement With Plan Participants	$ 940
Defined Benefit Plan, Benefit Obligation, Change In Control, Payment For Annuity	230
Defined Benefit Plan, Benefit Obligation, Change In Control, Annuity Option, Income And Payroll Tax Expense (Benefit)	205
Defined Benefit Plan, Benefit Obligation, Change In Control, Settlement Charge	687
Cost of Sales [Member] | Nonqualified Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Change In Control, Annuity Option, Income And Payroll Tax Expense (Benefit)	201
Selling, General and Administrative Expenses [Member] | Nonqualified Plan [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Change In Control, Annuity Option, Income And Payroll Tax Expense (Benefit)	$ 4