Share Repurchase Program and Treasury Stock (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Share Repurchase Program and Treasury Stock (Textuals) [Abstract]
Authorized amount under share repurchase program	$ 3,000,000,000
Remaining Amount to Repurchase under the program	809,900,000
Shares Purchased Under Share Repurchase Program	21,800,000
Repurchases of common stock	$ (82,498,000)	$ (72,300,000)	$ (294,976,000)
Number of shares repurchased	336,188	341,109
Average price of share repurchased, per share	$ 245.37	$ 211.94
Exercise of stock options and restricted stock units, shares reissued	69,442	117,014