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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Property, Plant and Equipment [Table Text Block]
Major classes of property, plant and equipment and their useful lives are as follows:
 
 
 
 
December 31
Useful life in years, $ in millions
 
Useful Life
 
2013
 
2012
Land and land improvements
 
   Up to 40(1)
 

$ 373

 

$ 373

Buildings and improvements
 
Up to 45
 
1,450

 
1,421

Machinery and other equipment
 
Up to 20
 
4,243

 
4,233

Capitalized software costs
 
3-5
 
418

 
413

Leasehold improvements
 
Length of Lease(1)
 
659

 
593

Property, plant and equipment, at cost
 
 
 
7,143

 
7,033

Accumulated depreciation
 
 
 
(4,337
)
 
(4,146
)
Property, plant and equipment, net
 
 
 

$2,806

 

$2,887


(1)
Land is not a depreciable asset. Leasehold improvements are depreciated over the useful life of the asset if it is shorter than the length of the lease.
Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are as follows:
 
 
December 31
$ in millions
 
2013
 
2012
Unamortized benefit plan costs, net of tax benefit of $1,972 in 2013 and $3,149 in 2012
 

($3,000
)
 

($4,790
)
Cumulative translation adjustment
 
18

 
4

Net unrealized loss on marketable securities and cash flow hedges, net of tax benefit of $1 in 2013 and $0 in 2012
 
(2
)
 
(1
)
Total accumulated other comprehensive loss
 

($2,984
)
 

($4,787
)