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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Unrealized gains (losses) on derivative instruments, net of income tax expense (benefit) of ($3) and ($1) $ (3) $ (1)
Reclassification of (gains) losses on settled derivative instruments, net of income tax expense (benefit) of $7 and $7 $ 7 $ 7