Segment Information

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Segment Information

Segment Information

We operate as one business segment, which is the business of discovering, developing, manufacturing and marketing therapies for the treatment of multiple sclerosis and other autoimmune disorders, neurodegenerative diseases and hemophilia and therefore, our chief operating decision-maker manages the operations of our Company as a single operating segment. Enterprise-wide disclosures about product revenues, other revenues and long-lived assets by geographic area and information relating to major customers are presented below. Revenues are primarily attributed to individual countries based on location of the customer or licensee.

Revenue by product is summarized as follows:

	For the Years Ended December 31,
	2012						2011						2010
(In millions)	United States		Rest of World		Total		United States		Rest of World		Total		United States		Rest of World		Total
AVONEX	$	1,793.7	$	1,119.4	$	2,913.1	$	1,628.3	$	1,058.3	$	2,686.6	$	1,491.6	$	1,026.8	$	2,518.4
TYSABRI	383.1		752.8		1,135.9		326.5		753.0		1,079.5		252.8		647.4		900.2
Other	—		117.1		117.1		—		70.0		70.0		—		51.5		51.5
Total product revenues	$	2,176.8	$	1,989.3	$	4,166.1	$	1,954.8	$	1,881.3	$	3,836.1	$	1,744.4	$	1,725.7	$	3,470.1

Geographic Information

The following tables contain certain financial information by geographic area:

December 31, 2012 (In millions)	U.S.		Europe(1)		Germany		Asia		Other		Total
Product revenues from external customers	$	2,176.8	$	1,216.2	$	409.2	$	93.2	$	270.7	$	4,166.1
Revenues from unconsolidated joint business	$	1,033.3	$	14.3	$	—	$	27.5	$	62.8	$	1,137.9
Other revenues from external customers	$	170.2	$	27.9	$	1.1	$	13.3	$	—	$	212.5
Long-lived assets	$	996.6	$	738.6	$	1.9	$	2.9	$	2.2	$	1,742.2
December 31, 2011 (In millions)	U.S.		Europe(1)		Germany		Asia		Other		Total
Product revenues from external customers	$	1,954.8	$	1,163.3	$	377.5	$	88.7	$	251.8	$	3,836.1
Revenues from unconsolidated joint business	$	878.8	$	29.9	$	—	$	30.7	$	57.2	$	996.6
Other revenues from external customers	$	187.0	$	28.3	$	0.6	$	—	$	—	$	215.9
Long-lived assets	$	1,012.5	$	816.6	$	1.6	$	5.3	$	2.4	$	1,838.4
December 31, 2010 (In millions)	U.S.		Europe(1)		Germany		Asia		Other		Total
Product revenues from external customers	$	1,744.4	$	1,090.7	$	362.4	$	69.0	$	203.6	$	3,470.1
Revenues from unconsolidated joint business	$	906.3	$	95.3	$	—	$	26.0	$	49.6	$	1,077.2
Other revenues from external customers	$	136.0	$	32.6	$	0.5	$	—	$	—	$	169.1
Long-lived assets	$	1,100.3	$	717.4	$	1.5	$	5.4	$	1.6	$	1,826.2

(1) Represents amounts related to Europe less those attributable to Germany.

Revenues from Unconsolidated Joint Business

Approximately 21%, 20% and 23% of our total revenues in 2012, 2011 and 2010, respectively, are derived from our joint business arrangement with Genentech. For additional information related to our collaboration with Genentech, please read Note 21, Collaborative and Other Relationships to these consolidated financial statements.

Significant Customers

We recorded revenue from two wholesale distributors accounting for 20% and 10% of gross product revenues in 2012, 18% and 10% of gross product revenue in 2011, and 18% and 11% of gross product revenues in 2010.

Other

As of December 31, 2012, 2011 and 2010, approximately $713.4 million, $668.5 million and $644.7 million, respectively, of our long-lived assets were related to our manufacturing facilities in Denmark.