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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Condensed Consolidated Statements of Comprehensive Income        
Gains (losses) on cash flow hedges, income tax effect $ 7 $ 2 $ 31 $ (28)
Amount of (gains) losses on cash flow hedges reclassified to earnings, income tax effect $ 17 $ (12) $ 29 $ (28)