ACQUISITIONS, DIVESTITURES AND LICENSING ARRANGEMENTS ASSETS HELD-FOR-SALE (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other Assets, Current		$ 17,160	$ 14,854
Receivables		5,965	6,300
Inventories		1,195	1,166
Property, plant and equipment		5,027	5,001
Goodwill		6,538	6,863
Liabilities, Current		10,654	9,563
Accrued liabilities		6,489	6,014
Accounts payable		1,892	2,248
Deferred Tax Liabilities, Net		814	754
Pension and other liabilities		1,048	1,164
Asset Impairment Charges		64
R&D Facility in Wallingford, CT [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset Impairment Charges		79
Scenario, Forecast [Member] | UPSA [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sales of Business, Affiliate and Productive Assets	$ 1,600
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other Assets, Current		479
Receivables		79
Inventories		81
Property, plant and equipment		187
Goodwill		127
Liabilities, Current		152
Accrued liabilities		78
Accounts payable		35
Deferred Tax Liabilities, Net		25	$ 0
Pension and other liabilities		$ 14