Property, Plant and Equipment, Net of Accumulated Depreciation

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment, Net of Accumulated Depreciation [Abstract]

Property, Plant and Equipment, Net of Accumulated Depreciation

8.Property, Plant and Equipment, Net of Accumulated Depreciation

Property, plant and equipment, net of accumulated depreciation follow (in millions):

	December 31,
	2019		2018
Land	$	452	$	467
Buildings		6,023		5,924
Equipment		19,100		18,078
Construction in progress		2,757		2,358
Subtotal		28,332		26,827
Accumulated depreciation		(12,995)		(11,932)
Total	$	15,337	$	14,895

Approximately $54 million, $49 million and $36 million of interest costs were capitalized as part of property, plant and equipment, net of accumulated depreciation, in 2019, 2018 and 2017, respectively.

Manufacturing equipment includes certain components of production equipment that are constructed of precious metals. At December 31, 2019 and 2018, the recorded value of precious metals totaled $3 billion in each period. Depletion expense for precious metals in the years ended December 31, 2019, 2018 and 2017 was $16 million, $14 million and $13 million, respectively.