Shareholders' Equity (Schedule Of Changes In Each Class Of Shares) (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
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
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]
Beginning balance, Treasury Stock	429,941,021	449,352,405	444,619,970
Stock Issued During Period, Shares, Treasury Stock Reissued	6,904,556	19,986,868	2,797,002
Acquired, Treasury Stock	307,242	575,484	7,529,437
Ending balance, Treasury Stock	423,343,707	429,941,021	449,352,405