BASIS OF PRESENTATION (New Accounting Pronouncements) (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2018	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in operating cash flow	$ 4,158	$ 1,615
Change in financing cash flow	(2,725)	(2,048)
ASU 2016-09 - Share-based Payment Transactions [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefit - reduction of tax expense	30
Change in operating cash flow	113	193
Change in financing cash flow	$ 113	$ 193
ASU 2016-16 - Income Tax Accounting for Intra-entity Transfers of Assets Other Than Inventory [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of an accounting change on retained earnings				$ 787
Internal intellectual property amortization				$ 86
ASU 2017-07 - Presentation of Net Periodic Pension and Postretirement Benefits [Member] | Scenario, Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net periodic pension benefit expected to be included in other income			$ 130
ASU 2014-09 - Revenue Recognition [Member] | Scenario, Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected reduction in revenue			225
Expected reduction in other income			$ 125