BUSINESS SEGMENT INFORMATION (Net Sales of Key Products) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 4,048	$ 4,443	$ 7,879	$ 9,694
Baraclude [Member]
Segment Reporting Information [Line Items]
Net Sales	371	357	737	682
Reyataz [Member]
Segment Reporting Information [Line Items]
Net Sales	431	406	792	764
Sustiva Franchise [Member]
Segment Reporting Information [Line Items]
Net Sales	411	388	798	774
Erbitux [Member]
Segment Reporting Information [Line Items]
Net Sales	171	179	333	358
Sprycel [Member]
Segment Reporting Information [Line Items]
Net Sales	312	244	599	475
Yervoy [Member]
Segment Reporting Information [Line Items]
Net Sales	233	162	462	316
Abilify [Member]
Segment Reporting Information [Line Items]
Net Sales	563	711	1,085	1,332
Bydureon [Member]
Segment Reporting Information [Line Items]
Net Sales	66		118
Byetta [Member]
Segment Reporting Information [Line Items]
Net Sales	104		189
Forxiga [Member]
Segment Reporting Information [Line Items]
Net Sales	5		8
Onglyza Kombiglyze [Member]
Segment Reporting Information [Line Items]
Net Sales	240	172	442	333
Nulojix [Member]
Segment Reporting Information [Line Items]
Net Sales	6	3	11	4
Orencia [Member]
Segment Reporting Information [Line Items]
Net Sales	352	290	672	544
Avapro Avalide [Member]
Segment Reporting Information [Line Items]
Net Sales	56	117	102	324
Eliquis [Member]
Segment Reporting Information [Line Items]
Net Sales	12	1	34	1
Plavix [Member]
Segment Reporting Information [Line Items]
Net Sales	44	741	135	2,434
Mature Products And All Other [Member]
Segment Reporting Information [Line Items]
Net Sales	$ 671	$ 672	$ 1,362	$ 1,353