XML 104 R26.htm IDEA: XBRL DOCUMENT v2.4.0.8
Summary of Principal Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
The following table summarizes our property as of December 31, 2013 and 2012:
Millions of dollars
 
2013
 
2012
 
Estimated
Useful Life
Land
 
$
76

 
$
74

 
n/a
Buildings
 
1,303

 
1,252

 
25 to 50 years
Machinery and equipment
 
7,940

 
7,778

 
3 to 25 years
Accumulated depreciation
 
(6,278
)
 
(6,070
)
 
 
Property, net
 
$
3,041

 
$
3,034