ALLIANCES (Valeant) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Alliances Statement [Line Items]
Net product sales									$ 14,045	$ 11,660	$ 12,304
Alliance revenues									2,515	4,219	4,081
Total Revenues	$ 4,287	$ 4,069	$ 4,163	$ 4,041	$ 4,258	$ 3,921	$ 3,889	$ 3,811	16,560	15,879	16,385
Other changes in operating assets and liabilities									(471)	33	760
Valeant [Member]
Alliances Statement [Line Items]
Proceeds from divestiture of business									61
Upfront, milestone and other licensing payments received												$ 79
Charge included in other (income)expense for change in fair value of option										16
Net product sales											4
Alliance revenues									(1)	44	49
Total Revenues									(1)	44	$ 53
Gain on sale of business									(88)
Other changes in operating assets and liabilities										16
Written Option Liability [Member]
Alliances Statement [Line Items]
Charge included in other (income)expense for change in fair value of option									$ 123	(36)
Fair value of option					198					198
Written Option Liability [Member] | Valeant [Member]
Alliances Statement [Line Items]
Fair value of option					$ 34					$ 34