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Discontinued Operations (Schedule Of Gain (Loss) from Discontinued Operations) (Details) (USD $)
In Millions
3 Months Ended
Jun. 30, 2011
Sep. 30, 2010
Jun. 30, 2010
Gross $ 2,546 $ 1,535 $ 308
After Taxes 2,546 1,522 235
Brazil [Member]
     
Gross 2,546    
After Taxes 2,546    
Azerbaijan [Member]
     
Gross   1,543  
After Taxes   1,524  
China Panyu [Member]
     
Gross     308
After Taxes     235
Other Segment [Member]
     
Gross   (8)  
After Taxes   $ (2)