ALLIANCES (AbbVie) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Alliances Statement [Line Items]
Net product sales	$ 19,258	$ 17,702	$ 14,045
Potential milestones to be paid		938	2,325
AbbVie [Member]
Alliances Statement [Line Items]
Net product sales	150	132	3
Cost of products sold - Distribution fees and royalties	$ 41	$ 34	$ 1
Maximum percentage of reimbursement for development costs from alliance partner	20.00%
Regulatory milestones paid through 2017	$ 140
Approval milestones paid through 2017	52
Potential milestones to be paid	120
Potential sales based milestones to be paid	$ 200
United States [Member] | AbbVie [Member]
Alliances Statement [Line Items]
Profit sharing involving only one compound - maximum	30.00%