Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Major categories of property, plant and equipment and accumulated depreciation and depletion

     The major categories of property, plant and equipment and accumulated depreciation and depletion are presented below:

Millions of Dollars		2013			2012
Land	$	24.1		$	26.5
Quarries/mining properties		39.6			39.6
Buildings		145.7			145.1
Machinery and equipment		956.0			937.6
Construction in progress		28.6			27.8
Furniture and fixtures and other		88.3			85.4
		1,282.3			1,262.0
Less: Accumulated depreciation and depletion		(976.2	)		(944.3	)
Property, plant and equipment, net	$	306.1		$	317.7