Shareholders' Equity (Common Stock Issued With The Exercise Of Stock Options) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stockholders' Equity Note [Abstract]
Shares issued	0.5	1.1	1.0	1.2
Proceeds from exercise of stock options	$ 9.9	$ 20.3	$ 20.5	$ 22.1
Average exercise price per share	$ 20.32	$ 18.56	$ 20.46	$ 18.46