Shareholders' Equity (Schedule Of Changes In Each Class Of Shares) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, Common Stock	1,012,261,159	1,012,261,159	1,012,261,159
Ending balance, Common Stock	1,012,261,159	1,012,261,159	1,012,261,159
Beginning balance, Treasury Stock	267,556,388	277,002,059	256,406,709
Issued, Treasury Stock	(11,935,423)	(9,800,174)	(9,851,420)
Acquired, Treasury Stock	1,009,663	354,503	497,850
ShareValue Trust termination, Treasury Stock			29,948,920
Ending balance, Treasury Stock	256,630,628	267,556,388	277,002,059
Beginning balance, Share Value Trust			29,563,324
Acquired, Share Value Trust			385,596
ShareValue Trust termination, Share Value Trust			(29,948,920)