v2.4.0.6
Long-Term Debt (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
SeaRiver Maritime Financial Holdings, Inc. [Member]
Dec. 31, 2011
Guaranteed Deferred Interest Debentures Due 2012 [Member]
SeaRiver Maritime Financial Holdings, Inc. [Member]
Schedule of Capitalization, Long-term Debt [Line Items]        
Long-term debt due in U.S. dollars $ 8,855      
U.S. dollar equivalent at year-end exchange rates of amounts payable in foreign currencies 467      
Portion of long-term debt included in current liability 3,431 345    
Long-term debt maturing - 2013 967      
Long-term debt maturing - 2014 871      
Long-term debt maturing - 2015 606      
Long-term debt maturing - 2016 503      
Other short-term borrowings       $ 2,662
Exxon Mobil Corporation ownership percent     100.00%