Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

($ in millions)		Useful Lives (years)	2017		2016
	Land and land improvements	1-30		$487		$451
	Buildings	20-40	1,488		1,324
	Machinery and equipment	5-25	3,432		3,076
	Other	3-20	958		774
	Construction in progress		229		380
	Total(1)			$6,594		$6,005
	Less: accumulated depreciation		3,770		3,397
	Net			$2,824		$2,608

(1) Interest capitalized in 2017, 2016 and 2015 was $7 million, $8 million and $9 million, respectively.