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Property, Plant and Equipment
 3 Months Ended
Mar. 31, 2017
Property, Plant and Equipment  
Property, Plant and Equipment

8.     Property, Plant and Equipment

 

 

 

 

 

 

 

 

 

 

March 31,

 

December 31,

($ in millions)

    

2017

    

2016

 

 

 

 

 

 

 

Land

 

$

101

 

$

105

Buildings

 

 

1,313

 

 

1,301

Machinery and equipment

 

 

4,872

 

 

4,723

Construction-in-progress

 

 

454

 

 

503

 

 

 

6,740

 

 

6,632

Accumulated depreciation

 

 

(2,337)

 

 

(2,245)

 

 

$

4,403

 

$

4,387

 

Property, plant and equipment are stated at historical or acquired cost. Depreciation expense amounted to $107 million and $65 million for the three months ended March 31, 2017 and 2016, respectively.