Property, Plant, and Equipment

9 Months Ended

Sep. 30, 2015

Property, Plant and Equipment [Abstract]

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



	September 30, 2015			December 31, 2014
Land and land improvements	$	145.8		$	143.5
Buildings	661.8			654.6
Machinery and equipment	4,671.7			4,508.0
Construction in progress	146.0			154.8
Other	58.7			54.5
Property, plant, and equipment, at cost	5,684.0			5,515.4
Less accumulated depreciation	(2,841.5		)	(2,657.8		)
Property, plant, and equipment, net	$	2,842.5		$	2,857.6

Depreciation expense for the three months ended September 30, 2015 and 2014, was $79.6 million and $95.1 million, respectively. During the nine months ended September 30, 2015 and 2014, depreciation expense was $243.5 million and $264.1 million, respectively. During the nine months ended September 30, 2015 and 2014, we recognized $9.0 million, and $35.4 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 September 30, 2015, and December 31, 2014, purchases of property, plant, and equipment included in accounts payable were $31.1 million and $13.9 million.