Property, Plant, and Equipment

3 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

8. Property, Plant, and Equipment

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


	March 31,			December 31,
	2023			2022
Land and land improvements	$	196.6		$	192.4
Buildings		1,043.6			1,023.6
Machinery and equipment		6,825.8			6,709.3
Construction in progress		378.4			440.2
Other		149.3			146.9
Property, plant and equipment, at cost		8,593.7			8,512.4
Less accumulated depreciation		(4,697.1	)		(4,612.4	)
Property, plant, and equipment, net	$	3,896.6		$	3,900.0

Depreciation expense for the three months ended March 31, 2023 and 2022 was $118.8 million and $98.5 million, respectively. During the three months ended March 31, 2023, we recognized $6.3 million of incremental depreciation expense as a result of corrugated products facilities and design center closures, and Jackson mill conversion-related activities. We recognized $1.1 million of incremental depreciation expense during the three months ended March 31, 2022 as a result of Jackson mill conversion-related activities.

At March 31, 2023 and December 31, 2022, purchases of property, plant, and equipment included in accounts payable were $48.8 million and $43.7 million, respectively.