Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Intangible Assets and Goodwill [Abstract]

Intangible assets

		As of December 31, 2011							As of December 31, 2010
(In millions)	Estimated Life	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Out-licensed patents	12-23 years	$	578.0	$	(391.3	)	$	186.7	$	578.0	$	(350.2	)	$	227.8
Core developed technology	15-23 years		3,005.3		(1,801.1	)		1,204.2		3,005.3		(1,636.9	)		1,368.4
In-process research and development	Up to 15 years upon commercialization		110.9		—			110.9		110.9		—			110.9
Trademarks and tradenames	Indefinite		64.0		—			64.0		64.0		—			64.0
In-licensed rights and patents	6-16 years		47.2		(4.8	)		42.4		3.0		(1.3	)		1.7
Assembled workforce	4 years		2.1		(2.1	)		—		2.1		(2.1	)		—
Distribution rights	2 years		12.7		(12.7	)		—		12.7		(12.7	)		—
Total intangible assets		$	3,820.2	$	(2,212.0	)	$	1,608.2	$	3,776.0	$	(2,003.2	)	$	1,772.8

Summary of roll forward of the changes in goodwill

	As of December 31,
(In millions)	2011		2010
Beginning balance	$	1,146.3	$	1,138.6
Goodwill acquired during the year		—		25.6
Other		—		(17.9	)
Ending balance	$	1,146.3	$	1,146.3