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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Schedule Of Property Plant And Equipment
Property, Plant and Equipment
 
December 31,
(In millions)
2014
 
2013
North America E&P
$
16,717

 
$
14,973

International E&P (a)
2,741

 
3,590

Oil Sands Mining
9,455

 
9,447

Corporate
127

 
135

Net property, plant and equipment
$
29,040

 
$
28,145
Schedule of Aging of Capitalized Exploratory Well Costs
Deferred exploratory well costs were as follows:
 
December 31,
(In millions)
2014
 
2013
 
2012
Amounts capitalized less than one year after completion of drilling
$
484

 
$
512

 
$
388

Amounts capitalized greater than one year after completion of drilling
126

 
281

 
229

Total deferred exploratory well costs
$
610

 
$
793

 
$
617

Number of projects with costs capitalized greater than one year after
 
 
 
 
 
completion of drilling
3

 
7

 
6

 
 
(In millions)
2014
 
2013
 
2012
Beginning balance
$
793

 
$
617

 
$
704

Additions
808

 
746

 
699

Dry well expense
(206
)
 
(147
)
 
(111
)
Transfers to development
(605
)
 
(414
)
 
(629
)
Dispositions(a)
(180
)
 
(9
)
 
(46
)
Ending balance
$
610

 
$
793

 
$
617
Schedule of Projects with Exploratory Well Costs Capitalized for More than One Year
Exploratory well costs capitalized greater than one year after completion of drilling as of December 31, 2014 are summarized by geographical area below:
(In millions)
  
Gabon
$
66

E.G.
22

Canada
38

Total
$
126