December 31,

($ in millions)

    

2016

    

2015

 

 

 

 

 

 

 

Land

 

$

105

 

$

70

Buildings

 

 

1,301

 

 

1,023

Machinery and equipment

 

 

4,723

 

 

3,904

Construction-in-progress

 

 

503

 

 

408

 

 

 

6,632

 

 

5,405

Accumulated depreciation

 

 

(2,245)

 

 

(2,719)

 

 

$

4,387

 

$

2,686