Stock-Based Compensation Plans (Schedule Of Company's Stock Option Plans) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2009
Stock-Based Compensation Plans [Abstract]
Number of Shares, Options outstanding Beginning Balance	4,309,000
Number of Shares, Granted	1,044,000
Number of Shares, Exercised	(1,543,000)	(110,050)
Number of Shares, Canceled	(192,000)
Number of Shares, Options outstanding Ending Balance	3,618,000
Number of Shares, Options exercisable Ending Balance	1,413,000
Weighted Average Exercise Price, Options outstanding Beginning Balance	$ 30.10
Weighted Average Exercise Price, Granted	$ 43.99
Weighted Average Exercise Price, Exercised	$ 30.15
Weighted Average Exercise Price, Canceled	$ 33.18
Weighted Average Exercise Price, Options outstanding Ending Balance	$ 33.92
Weighted Average Exercise Price, Options exercisable Ending Balance	$ 32.00
Weighted Average Remaining Life (Years), Options outstanding Ending Balance	3.52
Weighted Average Remaining Life (Years), Options exercisable Ending Balance	2.35