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Segment Reporting Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Valuation allowance	$ 273.6	$ 273.2
Property, plant and equipment	1,616.6	1,854.6
LIFO reserve	92.1	96.4
Corporate
Segment Reporting Information [Line Items]
Valuation allowance	377.1	201.1
Property, plant and equipment	63.5	73.0	64.6
Deferred compensation plan assets	57.2	50.6	46.5
LIFO reserve	$ 92.1	$ 96.4

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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