Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 item	Jun. 30, 2012
Segment Information
Number of Operating Segments			1
Number of principal customers			3
Segment and Geographic Area Information
Net sales	$ 4,692	$ 4,493	$ 9,021	$ 8,666
HUMIRA
Segment and Geographic Area Information
Net sales	2,606	2,325	4,850	4,259
Kaletra
Segment and Geographic Area Information
Net sales	278	275	497	496
AndroGel
Segment and Geographic Area Information
Net sales	258	276	498	508
Niaspan
Segment and Geographic Area Information
Net sales	232	211	418	402
Lupron
Segment and Geographic Area Information
Net sales	199	201	380	400
Synthroid
Segment and Geographic Area Information
Net sales	153	123	272	252
Sevoflurane
Segment and Geographic Area Information
Net sales	137	153	274	309
TriCor/TRILIPIX
Segment and Geographic Area Information
Net sales	107	311	235	565
Zemplar
Segment and Geographic Area Information
Net sales	107	95	188	185
Creon
Segment and Geographic Area Information
Net sales	106	88	196	156
Synagis
Segment and Geographic Area Information
Net sales	70	64	415	410
Duodopa
Segment and Geographic Area Information
Net sales	44	35	83	71
All other
Segment and Geographic Area Information
Net sales	$ 395	$ 336	$ 715	$ 653