Property, Plant, and Equipment

3 Months Ended

Mar. 31, 2016

Property, Plant and Equipment [Abstract]

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



	March 31, 2016			December 31, 2015
Land and land improvements	$	146.2		$	146.4
Buildings	641.3			640.9
Machinery and equipment	4,769.9			4,747.1
Construction in progress	148.3			119.1
Other	64.8			61.3
Property, plant, and equipment, at cost	5,770.5			5,714.8
Less accumulated depreciation	(2,952.6		)	(2,882.7		)
Property, plant, and equipment, net	$	2,817.9		$	2,832.1

Depreciation expense for the three months ended March 31, 2016 and 2015 was $80.7 million and $85.2 million, respectively. During the three months ended March 31, 2016 we recognized $0.1 million of incremental depreciation expense from shortening the useful lives of assets related to facilities closures. During the three months ended March 31, 2015 we recognized $9.0 million of incremental depreciation expense from shortening the useful lives of assets at our DeRidder, Louisiana mill as a result of restructuring activities.

At March 31, 2016 and December 31, 2015 purchases of property, plant, and equipment included in accounts payable were $29.4 million and $15.0 million.