v2.4.0.6
Disclosures About Segments And Related Information (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Disclosures About Segments And Related Information [Abstract]      
Interest related to Valdez punitive damages award     $ 140
Non-debt-related interest expense $ 165 $ 41 $ 500