Property (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property - gross	$ 1,647.8	$ 1,233.5
Accumulated depreciation	(374.1)	(394.8)
Property - net	1,273.7	838.7
Buildings
Property, Plant and Equipment [Line Items]
Property - gross	560.0	553.5
Land
Property, Plant and Equipment [Line Items]
Property - gross	572.7	254.8
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property - gross	230.9	200.2
Asphalt plants
Property, Plant and Equipment [Line Items]
Property - gross	48.0	0
Water, power and sewer systems
Property, Plant and Equipment [Line Items]
Property - gross	138.8	134.9
Other property improvements
Property, Plant and Equipment [Line Items]
Property - gross	90.2	83.0
Vessel
Property, Plant and Equipment [Line Items]
Property - gross	$ 7.2	$ 7.1

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 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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- 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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