Property, Plant And Equipment (Components Of Property, Plant And Equipment) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Property, Plant And Equipment [Abstract]
Land	$ 25.8	$ 26.0
Buildings and improvements	232.3	229.0
Machinery and equipment	463.9	481.9
Office equipment and other assets	30.6	31.0
Software	53.7	54.2
Mineral rights	0.7	1.6
Construction in progress	80.7	39.5
Gross Property, Plant and Equipment	887.7	863.2
Less accumulated depreciation and amortization	410.9	394.9
Net Property, Plant and Equipment	$ 476.8	$ 468.3

Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, at gross value.

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- Definition

Office Equipment and Other Assets

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- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount, as of the balance sheet date, of long-lived, depreciable assets that include building structures held for productive use including any addition, improvement, or renovation to the structure, such as interior masonry, interior flooring, electrical, and plumbing.

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- Definition

The gross amount of capitalized computer software costs as of the balance sheet date.

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Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

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Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

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Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services.

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Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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