Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income (Loss)	$ (292,558)	$ 5,268	$ (764,334)	$ (164,480)
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	547,335,000	545,504,000	547,029,000	545,245,000
Potential Dilutive Common Shares -[Abstract]
Stock Options/SARs	0	1,960,000	0	0
Restricted Stock/Units and Performance Units/Stock	0	2,219,000	0	0
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	547,335,000	549,683,000	547,029,000	545,245,000
Net Income (Loss) Per Share [Abstract]
Basic	$ (0.53)	$ 0.01	$ (1.40)	$ (0.30)
Diluted	$ (0.53)	$ 0.01	$ (1.40)	$ (0.30)
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Anti-dilutive Stock Options and SARs excluded from Diluted Earnings Per Share Calculation	10,200,000	2,000,000	10,400,000	10,000,000
Restricted Stock and Restricted Stock Units and Performance Units and Performance Stock Excluded from Calculation	4,600,000	0	4,600,000	5,500,000