BUSINESS SEGMENT INFORMATION (Net Sales of Key Products) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 3,889	$ 4,048	$ 7,700	$ 7,879
Alliance and other revenues	1,119	1,024	2,123	1,898
Baraclude [Member]
Segment Reporting Information [Line Items]
Total revenues	369	371	775	737
Reyataz [Member]
Segment Reporting Information [Line Items]
Total revenues	362	431	706	792
Sustiva Franchise [Member]
Segment Reporting Information [Line Items]
Total revenues	361	411	680	798
Alliance and other revenues	313	346	585	670
Erbitux [Member]
Segment Reporting Information [Line Items]
Total revenues	186	171	355	333
Sprycel [Member]
Segment Reporting Information [Line Items]
Total revenues	368	312	710	599
Yervoy [Member]
Segment Reporting Information [Line Items]
Total revenues	321	233	592	462
Abilify [Member]
Segment Reporting Information [Line Items]
Total revenues	555	563	1,095	1,085
Alliance and other revenues	499	454	940	849
Orencia [Member]
Segment Reporting Information [Line Items]
Total revenues	402	352	765	672
Eliquis [Member]
Segment Reporting Information [Line Items]
Total revenues	171	12	277	34
Diabetes alliance [Member]
Segment Reporting Information [Line Items]
Total revenues	27	438	206	796
Mature Products And All Other [Member]
Segment Reporting Information [Line Items]
Total revenues	767	754	1,539	1,571
Plavix [Member]
Segment Reporting Information [Line Items]
Total revenues	45	44	93	135
Avapro Avalide [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 59	$ 56	$ 115	$ 102