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Consolidated Statements of Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Intangible Assets (Excluding Goodwill) [Line Items]
Amortization of intangible assets	$ 45.9	$ 45.8
Favorable Manufacturing Contract
Intangible Assets (Excluding Goodwill) [Line Items]
Amortization of intangible assets	0	0.2
Acquired Intellectual Property Rights
Intangible Assets (Excluding Goodwill) [Line Items]
Amortization of intangible assets	$ 45.9	$ 45.6

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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