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PROPERTY, PLANT AND EQUIPMENT
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Text Block]
PROPERTY, PLANT AND EQUIPMENT AND LEASES

 
 
December 31,
Dollars in Millions
 
2016
 
2015
Land
 
$
107

 
$
107

Buildings
 
4,930

 
4,515

Machinery, equipment and fixtures
 
3,287

 
3,347

Construction in progress
 
849

 
662

Gross property, plant and equipment
 
9,173

 
8,631

Less accumulated depreciation
 
(4,193
)
 
(4,219
)
Property, plant and equipment
 
$
4,980

 
$
4,412



Depreciation expense was $448 million in 2016, $500 million in 2015 and $543 million in 2014.

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 $145 million in 2016 and $140 million in 2015 and 2014. Sublease income and capital lease obligations were not material for all periods presented.