Shareholders' Equity (Schedule Of Common Stock Outstanding Roll Forward) (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued at beginning of year			95,523,230
Shares cancelled, shares			(1,936,812)
Shares issued at end of year	93,586,418		93,586,418
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Treasury shares issued at beginning of year			4,563,595
Shares repurchased, shares	2,491,355	4,776,224	3,952,243	6,047,437
Shares issued out of treasury, shares			(456,558)
Shares cancelled, shares			(1,936,812)
Total treasury shares at end of year	6,122,468		6,122,468
Total shares outstanding at end of year	87,463,950		87,463,950