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Property Plant and Equipment - Additional Information (Detail) (Property Plant and Equipment, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Property Plant and Equipment
Component of Operating Other Cost and Expense [Line Items]
Depreciation of property, plant and equipment	$ 33.4	$ 31.3	$ 66.0	$ 62.6

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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