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Condensed Consolidated Statements of Operations Condensed Consolidated Statement of Operations (parentheticals) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Discontinued Operation, Tax Effect of Discontinued Operation $ 0 $ 4
Asset Impairment Expense [Member]    
Discontinued Operation, Tax Effect of Discontinued Operation $ 0 $ 0