BUSINESS SEGMENT INFORMATION (Net Sales of Key Products) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total Revenues	$ 4,441	$ 4,065	$ 4,048	$ 3,831	$ 4,191	$ 3,736	$ 4,443	$ 5,251	$ 16,385	$ 17,621	$ 21,244
Alliance and other revenues									4,081	3,967	3,622
Baraclude [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,527	1,388	1,196
Reyataz [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,551	1,521	1,569
Sustiva Franchise [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,614	1,527	1,485
Alliance and other revenues									1,366	1,267	1,203
Erbitux [Member]
Segment Reporting Information [Line Items]
Total Revenues									696	702	691
Sprycel [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,280	1,019	803
Yervoy [Member]
Segment Reporting Information [Line Items]
Total Revenues									960	706	360
Abilify [Member]
Segment Reporting Information [Line Items]
Total Revenues									2,289	2,827	2,758
Alliance and other revenues									1,840	2,340	2,303
Bydureon [Member]
Segment Reporting Information [Line Items]
Total Revenues									298	78
Byetta [Member]
Segment Reporting Information [Line Items]
Total Revenues									400	149
Forxiga [Member]
Segment Reporting Information [Line Items]
Total Revenues									23
Onglyza Kombiglyze [Member]
Segment Reporting Information [Line Items]
Total Revenues									877	709	473
Nulojix [Member]
Segment Reporting Information [Line Items]
Total Revenues									26	11	3
Orencia [Member]
Segment Reporting Information [Line Items]
Total Revenues									1,444	1,176	917
Avapro Avalide [Member]
Segment Reporting Information [Line Items]
Total Revenues									231	503	952
Eliquis [Member]
Segment Reporting Information [Line Items]
Total Revenues									146	2
Plavix [Member]
Segment Reporting Information [Line Items]
Total Revenues									258	2,547	7,087
Mature Products And All Other [Member]
Segment Reporting Information [Line Items]
Total Revenues									$ 2,765	$ 2,756	$ 2,950