ACQUISITION ACQUISITION - ALLOCATION OF PURCHASE PRICE (Details) - USD ($) $ in Millions		Jun. 30, 2019	Nov. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Business Acquisition [Line Items]
Goodwill		$ 40,273		$ 45,175	$ 44,699
PHC-MERCK ACQUISITION [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets			$ 419
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			121
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			2,143
Goodwill			2,138
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets			143
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets			4,964
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities			233
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent			767
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities			87
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities			1,087
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	[1]		169
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 3,708

[1] ⁽¹⁾  Represents a 48% minority ownership interest in the Merck India company.