Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator for Basic and Diluted Earnings Per Share - [Abstract]
Net Income	$ 706,353	$ 659,692	$ 1,367,281	$ 1,154,417
Denominator for Basic Earnings Per Share - [Abstract]
Weighted Average Shares	543,099	540,033	542,675	539,330
Potential Dilutive Common Shares -[Abstract]
Stock Options/SARs	2,759	1,973	2,597	2,100
Restricted Stock/Units and Performance Units/Stock	2,818	3,471	2,774	3,516
Denominator for Diluted Earnings Per Share - [Abstract]
Adjusted Diluted Weighted Average Shares	548,676	545,477	548,046	544,946
Net Income Per Share [Abstract]
Basic	$ 1.30	$ 1.22	$ 2.52	$ 2.14
Diluted	$ 1.29	$ 1.21	$ 2.49	$ 2.12
Anti-dilutive Stock Options and SARs excluded from Diluted Earnings Per Share Calculation	6,000	200,000	100,000	200,000