Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income	$ 1,103,618	$ 462,498	$ 2,470,899	$ 1,616,915
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	543,984	540,941	543,086	539,869
Potential Dilutive Common Shares -[Abstract]
Stock Options/SARs	2,760	2,378	2,644	2,196
Restricted Stock/Units and Performance Units/Stock	2,774	3,833	2,671	3,647
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	549,518	547,152	548,401	545,712
Net Income Per Share [Abstract]
Basic	$ 2.03	$ 0.85	$ 4.55	$ 3.00
Diluted	$ 2.01	$ 0.85	$ 4.51	$ 2.96
Anti-dilutive Stock Options and SARs excluded from Diluted Earnings Per Share Calculation (shares in thousands)	200	500	200	200