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Property, Plant and Equipment, Net
3 Months Ended
Mar. 31, 2015
Property, Plant and Equipment, Net [Abstract]  
Property, Plant and Equipment Disclosure [Text Block]
(3)
Property, Plant and Equipment, Net

Property, plant and equipment, net consists of the following (in millions):

 
 
 
As of
 
 
 
March 31,
 
December 31,
 
Depreciable Life
 
2015
 
2014
 
 
 
 
 
 
Property, plant and equipment in-service
5-75 years
 
$
25,947

 
$
25,813

Accumulated depreciation and amortization
 
 
(8,173
)
 
(8,026
)
Net property, plant and equipment in-service
 
 
17,774

 
17,787

Construction work-in-progress
 
 
1,009

 
932

Total property, plant and equipment, net
 
 
$
18,783

 
$
18,719