Property, Plant, and Equipment

6 Months Ended

Jun. 30, 2016

Property, Plant and Equipment [Abstract]

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



	June 30, 2016			December 31, 2015
Land and land improvements	$	147.8		$	146.4
Buildings	645.5			640.9
Machinery and equipment	4,800.0			4,747.1
Construction in progress	172.8			119.1
Other	63.7			61.3
Property, plant, and equipment, at cost	5,829.8			5,714.8
Less accumulated depreciation	(3,019.9		)	(2,882.7		)
Property, plant, and equipment, net	$	2,809.9		$	2,832.1

Depreciation expense for the three months ended June 30, 2016 and 2015 was $79.9 million and $78.7 million, respectively. During the six months ended June 30, 2016 and 2015, depreciation expense was $160.6 million and $163.9 million, respectively. During the six months ended June 30, 2016 and 2015, we recognized $0.4 million and $9.0 million, respectively, of incremental depreciation expense from shortening the useful lives of assets related to facilities closures in 2016 and restructuring activities at our DeRidder, Louisiana mill in 2015.

At June 30, 2016 and December 31, 2015 purchases of property, plant, and equipment included in accounts payable were $33.1 million and $15.0 million, respectively.