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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Unrealized holding losses arising during period, income tax benefit $ 19 $ 9 $ 2 $ 5
Reclassification adjustments included in net loss, income tax benefit $ 6 $ 6 $ 13 $ 12