Segment Information (Product Sales) (Details) (USD $) In Thousands | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | |
| Segment Reporting Information [Line Items] | ||||
| Product sales | $ 2,065,859 | $ 1,865,559 | $ 5,969,025 | $ 5,459,683 |
Antiviral Products [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 1,794,655 | 1,649,911 | 5,189,743 | 4,838,285 |
Antiviral Products [Member] | Atripla [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 794,699 | 742,692 | 2,361,203 | 2,151,368 |
Antiviral Products [Member] | Truvada [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 744,727 | 668,741 | 2,129,139 | 1,968,222 |
Antiviral Products [Member] | Viread [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 192,887 | 184,263 | 546,999 | 541,121 |
Antiviral Products [Member] | Hepsera [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 35,631 | 47,519 | 112,383 | 156,977 |
Antiviral Products [Member] | Emtriva [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 7,667 | 6,696 | 20,975 | 20,597 |
Antiviral Products [Member] | Complera [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 19,044 | 19,044 | ||
AmBisome [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 82,241 | 75,132 | 249,372 | 230,355 |
Letairis [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 78,954 | 60,446 | 214,765 | 176,293 |
Ranexa [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | 81,983 | 60,312 | 236,353 | 172,015 |
Other Products [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Product sales | $ 28,026 | $ 19,758 | $ 78,792 | $ 42,735 |