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Quarterly Financial Data (Unaudited)
 12 Months Ended
Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data (Unaudited)

17. Quarterly Financial Data (Unaudited)

Summarized quarterly results, were as follows (in millions, except per share data):

 

     First      Second      Third      Fourth  
     Quarter      Quarter      Quarter      Quarter  

Year ended December 31, 2016

            

Revenue

    $ 2,189      $ 1,724      $ 1,646      $ 1,692  

Gross profit (loss)

      244        35        79        (459 ) 

Net loss attributable to Company

      (119 )       (217 )       (1,362 )       (714 ) 

Net loss attributable to Company per basic share

      (0.32 )       (0.58 )       (3.62 )       (1.90 ) 

Net loss attributable to Company per diluted share

      (0.32 )       (0.58 )       (3.62 )       (1.90 ) 

Cash dividends per share

      0.46        0.05        0.05        0.05  

Year ended December 31, 2015

            

Revenue

    $ 4,820      $ 3,909      $ 3,306      $ 2,722  

Gross profit

      1,177        855        672        359  

Net income (loss) attributable to Company

      310        289        155        (1,523 ) 

Net income (loss) attributable to Company per basic share

      0.76        0.75        0.41        (4.06 ) 

Net income (loss) attributable to Company per diluted share

      0.76        0.74        0.41        (4.06 ) 

Cash dividends per share

      0.46        0.46        0.46        0.46