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Inventories
9 Months Ended
Sep. 30, 2013
Inventory Disclosure [Abstract]  
Inventories [Text Block]
Inventories
 Inventories are carried at the lower of cost or market value.
 
September 30,
 
December 31,
(In millions)
2013
 
2012
Liquid hydrocarbons, natural gas and bitumen
$
46

 
$
73

Supplies and other items
314

 
288

Inventories, at cost
$
360

 
$
361