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Property, Plant and Equipment (Tables)
 6 Months Ended
Jun. 30, 2017
Property, Plant and Equipment [Abstract]  
Schedule Of Property Plant And Equipment [Table Text Block]
 
June 30,
 
December 31,
(In millions)
2017
 
2016
United States E&P
$
15,888

 
$
14,158

International E&P
2,358

 
2,470

Corporate
91

 
99

Net property, plant and equipment
$
18,337


$
16,727