Property, Plant, and Equipment

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment [Abstract]

The components of property, plant, and equipment were as follows (dollars in millions):



	June 30, 2015			December 31, 2014
Land and land improvements	$	150.7		$	143.5
Buildings	659.5			654.6
Machinery and equipment	4,621.3			4,508.0
Construction in progress	144.7			154.8
Other	54.9			54.5
Property, plant, and equipment, at cost	5,631.1			5,515.4
Less accumulated depreciation	(2,778.4		)	(2,657.8		)
Property, plant, and equipment, net	$	2,852.7		$	2,857.6

Depreciation expense for the three months ended June 30, 2015 and 2014, was $78.7 million and $93.0 million, respectively. During the six months ended June 30, 2015 and 2014, depreciation expense was $163.9 million and $169.0 million, respectively. During the six months ended June 30, 2015 and 2014, we recognized $9.0 million, and $17.2 million, respectively, of incremental depreciation expense from shortening the useful lives of assets at our DeRidder, Louisiana mill as a result of restructuring activities.

At June 30, 2015, and December 31, 2014, purchases of property, plant, and equipment included in accounts payable were $31.4 million and $13.9 million.