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Other Intangible Assets, Net (Roll Forward) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Intangible Assets Roll Forward
As at January 1,			$ 2,388.1	$ 2,493.0
Acquisitions			732.8	272.5
Amortization charged			(91.7)	(97.3)
Impairment charges	(19.9)	(27.0)	(19.9)	(27.0)
Foreign currency translation			(11.2)	(15.6)
As at June 30,	$ 2,998.1	$ 2,625.6	$ 2,998.1	$ 2,625.6

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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