Shareholders' Equity (Schedule Of Share Repurchases) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	May. 01, 2014
Stockholders' Equity Note [Abstract]
Stock Repurchase Program, Authorized Amount			$ 500.0
Equity Compensation Plans Treasury Shares Reserved For Future Issuance	3,000,000
Shares repurchased, shares	1,460,888	1,271,213
Cost of shares repurchased	$ 50.0	$ 50.9
Shares repurchased, average price per share	$ 34.23	$ 40.08