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Consolidated Statement Of Comprehensive Income (Loss) (Unaudited) (Parentheticals) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Realized and unrealized gains from hedging activity, tax $ 0 $ 1 $ 0 $ 2
Unrealized gain from investment, tax   0    
Pension and other postretirement benefit plan obligation activity, tax $ 23 $ 17 $ 30 $ 32