Common and Preferred Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended		2 Months Ended	12 Months Ended
	Feb. 26, 2014	Nov. 16, 2011	Feb. 26, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Issued Shares Parantheticals [Abstract]
Common stock par value				$ 0.25	$ 0.25
Common Stock Shares Authorized				600,000,000	600,000,000
Common And Preferred Stock Text Details [Abstract]
Preferred Stock, Shares Outstanding				0	0
Preferred Stock, Shares Authorized				25,000,000
Preferred Stock, Par or Stated Value Per Share				$ 1
600,000 shares authorized
Outstanding - January 1			275,526,000	285,829,000	285,533,000
Stock Issued During Period, Shares, New Issues		15,200,000,000
Shares Issued For Benefit Plans In Period				3,319,000	4,695,000
Repurchase of common stock			(5,000,000)	(13,622,000)	(4,399,000)
Outstanding - December 31				275,526,000	285,829,000	285,533,000
Treasury stock				90,619,000	80,316,000
Issued - December 31				366,145,000	366,145,000
Common Stock Issuance Text Details [Abstract]
Cost of Common Stock Issued Per Share		$ 42.75
Proceeds From Issuance Of Common Stock Net		$ 629
Proceeds From Issuance Of Common Stock Gross		650
Stock Repurchase Program, Remaining Authorized Repurchase Amount	901
Payments For Repurchase Of Common Stock			411	1,003	208	225
Stock Repurchase Program, Authorized Amount Increase	$ 500