BOEING CO | 2013 | FY | 3


Property, Plant and Equipment
Property, plant and equipment at December 31 consisted of the following:
 
2013

 
2012

Land

$562

 

$531

Buildings and land improvements
11,068

 
10,696

Machinery and equipment
12,376

 
11,847

Construction in progress
1,288

 
1,231

Gross property, plant and equipment
25,294

 
24,305

Less accumulated depreciation
(15,070
)
 
(14,645
)
Total

$10,224

 

$9,660


Depreciation expense was $1,338, $1,248 and $1,119 for the years ended December 31, 2013, 2012 and 2011, respectively. Interest capitalized during the years ended December 31, 2013, 2012 and 2011 totaled $87, $74 and $57, respectively.
Rental expense for leased properties was $287, $276 and $270, for the years ended December 31, 2013, 2012 and 2011, respectively. At December 31, 2013, minimum rental payments under capital leases aggregated $134. Minimum rental payments under operating leases with initial or remaining terms of one year or more aggregated $1,401, net of sublease payments of $14 at December 31, 2013. Payments due under operating and capital leases net of sublease amounts and non-cancellable future rentals during the next five years are as follows:
 
2014

 
2015

 
2016

 
2017

 
2018

Minimum operating lease payments, net of sublease amounts

$223

 

$171

 

$142

 

$120

 

$95

Minimum capital lease payments, net of sublease amounts
61

 
37

 
22

 
14

 
0


Accounts payable related to purchases of property, plant and equipment were $213 and $234 for the years ended December 31, 2013 and 2012.

us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock