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Consolidated Statement of Comprehensive Income (Loss) (Parentheticals) (USD $)
In Millions, unless otherwise specified
4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2013
Successor [Member]
Aug. 31, 2013
Predecessor [Member]
Dec. 31, 2012
Predecessor [Member]
Dec. 31, 2011
Predecessor [Member]
Unrealized gains on available-for-sale securities, tax $ 0 $ 0 $ 0 $ 0
Realized and unrealized gains from hedging activity, tax 0 0 2 0
Reclassification adjustment for hedging, tax 0 0 2 0
Pension and other postretirement benefit plan obligation activity, tax $ 3 $ 462 $ 146 $ 71