Other Intangible Assets, Net (Roll Forward) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Other Intangible Assets Roll Forward
As at January 1,	$ 4,934.4	$ 2,312.6
Acquisitions	5,167.8	3,321.4
Amortization charged	(219.6)	(119.0)
Impairment charges	(523.3)	(188.0)
Foreign currency translation	(48.9)	(1.5)
As at June 30,	$ 9,310.4	$ 5,325.5