Fixed Assets

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Fixed Assets

FIXED ASSETS

(dollars in millions)	Estimated Useful Lives	2019		2018
Land		$	292	$	266
Buildings and improvements	12-40 years	4,978		4,768
Machinery, tools and equipment	3-20 years	12,936		11,951
Other, including assets under construction		1,871		1,735
		20,077		18,720
Accumulated depreciation		(9,755)		(8,814)
		$	10,322	$	9,906

Depreciation expense is recorded predominantly utilizing the straight-line method and was $1,191 million in 2019, $945 million in 2018 and $869 million in 2017.