Fixed Assets (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Fixed Assets [Text Block]

(dollars in millions)	Estimated Useful Lives	2017			2016
Land		$	412		$	392
Buildings and improvements	12-40 years	5,727			5,180
Machinery, tools and equipment	3-20 years	13,476			12,471
Other, including assets under construction		1,749			1,426
		21,364			19,469
Accumulated depreciation		(11,178		)	(10,311		)
		$	10,186		$	9,158