ACQUISITION - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2018
Business Acquisition [Line Items]
Goodwill		$ 46,932		$ 46,932		$ 46,932	$ 45,175
Net Sales		$ 17,438	$ 17,395	$ 34,128	$ 34,048
PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 3,700
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage	48.00%
Goodwill	$ 2,010
Business Acquisition, Goodwill, Expected Tax Deductible Amount	180
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 2,111
Net Sales						$ 1,000
Trade Names [Member] | PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				14 years
Trade Names [Member] | Minimum | PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years
Trade Names [Member] | Maximum | PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				20 years
Patents and Developed Technology [Member] | PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				7 years
Customer Relationships [Member] | PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				20 years