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Property (Tables)
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property
Property, Plant and Equipment
(Millions)
Useful
Lives
(years)
 
2013
 
2012
 
Land and land improvements
5-30
 
$
473

 
$
504

 
Buildings
20-40
 
1,593

 
1,568

 
Machinery and equipment
5-25
 
4,513

 
5,952

 
Other
3-20
 
743

 
735

 
Construction in progress
 
 
359

 
271

 
Total(1)
 
 
$
7,681

 
$
9,030

 
Less: accumulated depreciation
 
 
$
4,805

 
$
6,142

 
Net
 
 
$
2,876

 
$
2,888

(1)
Interest capitalized in 2013, 2012 and 2011 was $10 million, $8 million and $9 million, respectively.