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Inventories
3 Months Ended
Mar. 31, 2014
Inventory Disclosure [Abstract]  
Inventories [Text Block]
Inventories
 Inventories are carried at the lower of cost or market value.
 
March 31,
 
December 31,
(In millions)
2014
 
2013
Liquid hydrocarbons, natural gas and bitumen
$
68

 
$
55

Supplies and other items
337

 
309

Inventories, at cost
$
405

 
$
364