Shareholders' Equity (Schedule Of Common Stock Outstanding Roll Forward) (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued at beginning of year	95,523,230
Shares cancelled, shares	(1,460,888)
Shares issued at end of year	94,062,342
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Treasury shares issued at beginning of year	4,563,595
Shares repurchased, shares	1,460,888	1,271,213
Shares issued out of treasury, shares	(341,701)
Shares cancelled, shares	(1,460,888)
Total treasury shares at end of year	4,221,894
Total shares outstanding at end of year	89,840,448