CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 367,373	$ 279,208	$ 768,910	$ 534,294
Other comprehensive income (loss):
Foreign currency translation adjustments	(16,274)	4,985	2,082	18,821
Change in functional currency of a foreign subsidiary			13,144
Net unrealized gains (losses) related to cash flow hedges:
Unrealized holding gains (losses), net of tax expense (benefit) of ($12,130) and ($44) for the three-months ended June 30, 2012 and 2011, respectively, and ($11,881) and ($5) for the six-months ended June 30, 2012 and 2011, respectively.	24,590	(31,178)	47,876	(57,171)
Reclassification adjustment for (gains) losses included in net income, net of tax (expense) benefit of ($404) and ($611) for the three-months ended June 30, 2012 and 2011, respectively, and ($3,022) and ($1,117) for the six-months ended June 30, 2012 and 2011, respectively.	(18,575)	8,211	(35,013)	4,148
Net unrealized gains (losses) on marketable securities available for sale:
Unrealized holding gains (losses), net of tax expense (benefit) of ($70) and ($425) for the three-months ended June 30, 2012 and 2011, respectively, and ($94) and $1,510 for the six-months ended June 30, 2012 and 2011, respectively.	(827)	2,049	1,634	3,938
Reclassification adjustment for (gains) losses included in net income, net of tax (expense) benefit of $45 and ($70) for the three-months ended June 30, 2012 and 2011, respectively, and $45 and $256 for the six-months ended June 30, 2012 and 2011, respectively.	48	4	(304)	1,033
Total other comprehensive income (loss)	(11,038)	(15,929)	29,419	(29,231)
Comprehensive income	356,335	263,279	798,329	505,063
Comprehensive loss attributable to non-controlling interest		190		694
Comprehensive income attributable to Celgene	$ 356,335	$ 263,469	$ 798,329	$ 505,757