Property and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

NOTE 10. Property and Equipment

Property and equipment, net consists of the following:

	December 31
	2018			2017
	(Dollars in Millions)
Land	$	13		$	13
Buildings and improvements	76			73
Machinery, equipment and other	531			471
Construction in progress	56			65
Total property and equipment	676			622
Accumulated depreciation	(303		)	(269		)
	373			353
Product tooling, net of amortization	24			24
Property and equipment, net	$	397		$	377

Depreciation and amortization expenses are summarized as follows:

	Year Ended December 31
	2018		2017		2016
	(Dollars in Millions)
Depreciation	$	73	$	71	$	66
Amortization	3		3		3
	$	76	$	74	$	69

The net book value of capitalized internal use software costs was approximately $19 million and $11 million as of December 31, 2018 and 2017, respectively. Related amortization expense was approximately $7 million, $4 million and $4 million for the years ended 2018, 2017 and 2016. Amortization expense of approximately $7 million, $6 million, $4 million and $1 million is expected for the annual periods ended December 31, 2019, 2020, 2021 and 2022, respectively.