Net Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income (Loss)	$ (169,748)us-gaap_NetIncomeLoss	$ 660,928us-gaap_NetIncomeLoss
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	544,998,000	542,278,000
Potential Dilutive Common Shares -[Abstract]
Stock Options/SARs	0	2,426,000
Restricted Stock/Units and Performance Units/Stock	0	3,367,000
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	544,998,000	548,071,000
Net Income (Loss) Per Share [Abstract]
Basic	$ (0.31)us-gaap_EarningsPerShareBasic	$ 1.22us-gaap_EarningsPerShareBasic
Diluted	$ (0.31)us-gaap_EarningsPerShareDiluted	$ 1.21us-gaap_EarningsPerShareDiluted
Anti-dilutive Stock Options and SARs excluded from Diluted Earnings Per Share Calculation (shares in thousands)	4,200,000	200,000
Restricted Stock and Restricted Stock Units and Performance Units and Performance Stock Excluded from Calculation	5,800,000

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Aggregate awards of share options and nonvested shares to be issued under a share-based compensation arrangement are considered options for purposes of diluted earnings per share (DEPS). Share-based awards considered outstanding at grant date when computing DEPS although exercise may be vesting contingent. Share-based awards are included in DEPS computation even if employee may not receive (or sell) the stock until future date. All shares to be issued shall be included in computing DEPS, if dilutive.

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Restricted Stock and Restricted Stock Units and Performance Units and Performance Stock Excluded from Calculation

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No definition available.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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