Other Intangible Assets, Net (Roll Forward) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Other Intangible Assets [Roll Forward]
As at January 1,	$ 1,978.9	$ 1,790.7
Acquisitions	717.1	472.7
Amortization charged	(166.7)	(135.2)
Impairment charges	(16.0)	0
Impairment on re-measurement of DAYTRANA to fair value less costs to sell	0	(42.7)
Reclassification of DAYTRANA to assets held for sale	0	(56.0)
Foreign currency translation	(20.3)	(50.6)
As at December 31,	$ 2,493.0	$ 1,978.9