Shareholders' Equity (Schedule Of Common Stock Outstanding Roll Forward) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Shares issued:
Shares issued at beginning of period, shares			100,775,256
Shares cancelled, shares			(5,252,026)
Shares issued at end of period, shares	95,523,230		95,523,230
Treasury shares:
Treasury shares issued at beginning of period, shares			4,579,774
Shares repurchased, shares	0	654,851	6,047,437	4,616,543
Shares issued out of treasury, shares			(763,843)
Shares cancelled, shares			(5,252,026)
Total treasury shares at end of period, shares	4,611,342		4,611,342
Total shares outstanding at end of year	90,911,888		90,911,888