ACCRUED LIABILITIES (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Rebates and returns	$ 2,633		$ 2,417
Employee compensation and benefits	443		848
Research and development	884		805
Dividends Payable, Current	671		669
Royalties	361		391
Liabilities related to the deal contingent forward interest rate swap	240		0
Branded Prescription Drug Fee	263		188
Liabilities related to assets held-for-sale	163		152
Litigation and other settlements	80		118
Operating Lease, Liability, Current	67	$ 40	0
Restructuring	38		85
Liability, Pension and Other Postretirement and Postemployment Benefits, Current	35		35
Deferred income	92		172
Income taxes payable	360		398
Other	831		781
Other liabilities, current	$ 7,161		$ 7,059