Property, Plant and Equipment

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

9. Property, Plant and Equipment

(Dollars in millions)	December 31,
	2021			2020			Estimated life
Land and land improvements	$	147		$	121		n/a to 15
Buildings		957			962		20-40
Machinery and equipment		4,193			4,208		3-12
Construction in progress		354			314		n/a
Property, plant and equipment	$	5,651		$	5,605
Less accumulated depreciation		(3,796	)		(3,736	)
Net of depreciation	$	1,855		$	1,869

DEPRECIATION INCLUDED IN	2021		2020		2019
Cost of sales	$	348	$	327	$	307
Selling, general and administrative expenses		13		13		13
Research, development and engineering expenses, net		23		21		19
Total	$	384	$	361	$	339

No significant fixed asset impairments related to the Company’s continuing operations were recognized during 2021, 2020 or 2019.

The net book value of machinery and equipment and buildings and land under finance lease contracts recorded at December 31, 2021 and December 31, 2020 were immaterial. The amortization expense related to finance leases is included with depreciation expenses disclosed in the table above.