PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Text Block]

PROPERTY, PLANT AND EQUIPMENT AND LEASES

	December 31,
Dollars in Millions	2017			2016
Land	$	100		$	107
Buildings	4,848			4,930
Machinery, equipment and fixtures	3,059			3,287
Construction in progress	980			849
Gross property, plant and equipment	8,987			9,173
Less accumulated depreciation	(3,986		)	(4,193		)
Property, plant and equipment	$	5,001		$	4,980

Depreciation expense was $682 million in 2017, $448 million in 2016 and $500 million in 2015.

Gross property, plant and equipment of $475 million ($85 million net of accumulated depreciation) was reclassified to assets held-for-sale at December 31, 2017 as a result of the pending sale of a R&D facility in Wallingford, Connecticut. Refer to "—Note 4. Acquisitions, Divestitures and Licensing Arrangements" for additional information.

Annual minimum rental commitments for non-cancelable operating leases (primarily real estate and motor vehicles) are approximately $100 million in each of the next five years and an aggregate $300 million thereafter. Operating lease expense was approximately $120 million in 2017, $145 million in 2016 and $140 million in 2015. Sublease income and capital lease obligations were not material for all periods presented.