Consolidated Statements of Changes in Equity (USD $) In Millions	Total	Common stock	Additional paid-in capital	Treasury stock	Accumulated other comprehensive income	Retained earnings/(accumulated deficit)	Noncontrolling interest in subsidiaries
As at Dec. 31, 2008	$ 1,327.5	$ 55.5	$ 2,594.6	$ (397.2)	$ 97.0	$ (1,022.7)	$ 0.3
Shares as at Dec. 31, 2008		560.2
Net income/(loss)	491.4					491.6	(0.2)
Foreign currency translation	35.2				35.2
Options exercised	0.6	0.1	0.5
Options exercised, shares		1.3
Share-based compensation	65.7		65.7
Tax benefit associated with exercise of stock options	16.8		16.8
Shares issued (purchased) by ESOT	(1.0)			(1.0)
Shares released by ESOT to satisfy exercise of stock options	13.9			50.8		(36.9)
Unrealized holding gain (loss) on available-for-sale securities, net of taxes	16.1				16.1
Realized gain on divestment of available-for-sale securities, net of taxes	0
Other than temporary impairment of available-for-sale securities, net of taxes	0.8				0.8
Purchase of shares in Jerini AG ("Jerini") from noncontrolling interest	(0.4)						(0.4)
Capital contribution attributable to noncontrolling interest in Jerini	0.3						0.3
Dividends	(54.4)					(54.4)
As at Dec. 31, 2009	1,912.5	55.6	2,677.6	(347.4)	149.1	(622.4)	0
Shares as at Dec. 31, 2009		561.5
Net income/(loss)	588.0					588.0
Foreign currency translation	(51.3)				(51.3)
Options exercised	2.1	0.1	2.0
Options exercised, shares		0.7
Share-based compensation	62.2		62.2
Tax benefit associated with exercise of stock options	2.9		2.9
Shares issued (purchased) by ESOT	0		1.7	(1.7)
Shares released by ESOT to satisfy exercise of stock options	9.1			73.0		(63.9)
Unrealized holding gain (loss) on available-for-sale securities, net of taxes	(13.6)				(13.6)
Realized gain on divestment of available-for-sale securities, net of taxes	0
Other than temporary impairment of available-for-sale securities, net of taxes	1.5				1.5
Dividends	(62.0)					(62.0)
As at Dec. 31, 2010	2,451.4	55.7	2,746.4	(276.1)	85.7	(160.3)
Shares as at Dec. 31, 2010	562.2	562.2
Net income/(loss)	865.0					865.0
Foreign currency translation	(24.0)				(24.0)
Options exercised	0.7		0.7
Options exercised, shares		0.3
Share-based compensation	76.8		76.8
Tax benefit associated with exercise of stock options	29.4		29.4
Shares issued (purchased) by ESOT	(151.8)			(151.8)
Shares released by ESOT to satisfy exercise of stock options	12.7			140.7		(128.0)
Unrealized holding gain (loss) on available-for-sale securities, net of taxes	16.2				16.2
Realized gain on divestment of available-for-sale securities, net of taxes	(20.0)				(20.0)
Other than temporary impairment of available-for-sale securities, net of taxes	2.4				2.4
Dividends	(73.8)					(73.8)
As at Dec. 31, 2011	$ 3,185.0	$ 55.7	$ 2,853.3	$ (287.2)	$ 60.3	$ 502.9
Shares as at Dec. 31, 2011	562.5	562.5