Common Stock And Share-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012 Y
Common Stock And Share-Based Compensation [Abstract]
Options outstanding at January 1, 2012	19,628,200
Granted, Options	2,207,809
Forfeited and canceled, Options	(2,367,742)	[1]
Exercised, Options	(35,161)
Options outstanding at March 31, 2012	19,433,106
Options exercisable at March 31, 2012	15,856,092
Options outstanding at January 1, 2012, Weighted Average Exercise Price	$ 19.27
Granted, Weighted Average Exercise Price	$ 12.07
Forfeited and canceled, Weighted Average Exercise Price	$ 13.15	[1]
Exercised, Weighted Average Exercise Price	$ 10.48
Options outstanding at March 31, 2012, Weighted Average Exercise Price	$ 19.17
Options exercisable at March 31, 2012, Weighted Average Exercise Price	$ 20.83
Options outstanding at March 31, 2012, Weighted Average Contractual Life (Years)	5.03
Options exercisable at March 31, 2012, Weighted Average Contractual Life (Years)	4.08
Options outstanding at March 31, 2012, Aggregate Intrinsic Value	$ 3,452,967
Options exercisable at March 31, 2012, Aggregate Intrinsic Value	$ 1,270,047

[1] Pursuant to the terms of our stock option plans, options that are forfeited or canceled may be available for future grants.