Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment, Net.

Property, Plant and Equipment, Net

10.     Property, Plant and Equipment, Net

	March 31,		December 31,
($ in millions)	2021		2020
Land	$	161	$	163
Buildings		1,708		1,653
Machinery and equipment		6,338		6,214
Construction-in-progress		990		883
		9,197		8,913
Accumulated depreciation		(3,627)		(3,562)
	$	5,570	$	5,351

Depreciation expense amounted to $123 million and $124 million for the three months ended March 31, 2021 and 2020, respectively.