Property, plant and equipment

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment Disclosure [Abstract]

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

The following table summarizes our Property, plant and equipment (in millions):

	December 31,
	2019			2018
Land and land improvements	$	404		$	404
Buildings and improvements (including leasehold improvements)	3,358			2,344
Laboratory and manufacturing equipment	805			697
Office and computer equipment	634			558
Construction in progress	723			1,194
Subtotal	5,924			5,197
Less accumulated depreciation and amortization	(1,422		)	(1,191		)
Total	$	4,502		$	4,006

Office and computer equipment includes capitalized software. We had unamortized capitalized software costs on our Consolidated Balance Sheets of $108 million and $121 million as of December 31, 2019 and 2018, respectively. Capitalized interest on construction in-progress is included in property, plant and equipment. Interest capitalized in 2019, 2018 and 2017 was not material.