Employee Benefit Plans (Summary Of Information About Options Outstanding) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 years
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 0.85
Range of Exercise Prices, Maximum	$ 33.61
Options Outstanding	19,059,176
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	3.80
Options Outstanding, Weighted Average Exercise Price	$ 6.90
Options Exercisable	10,801,575
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	2.66
Options Exercisable, Weighted Average Exercise Price	$ 8.90
$0.85 - $5.12 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 0.85
Range of Exercise Prices, Maximum	$ 5.12
Options Outstanding	9,537,217
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	4.49
Options Outstanding, Weighted Average Exercise Price	$ 1.94
Options Exercisable	4,319,249
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	3.62
Options Exercisable, Weighted Average Exercise Price	$ 1.02
$5.13 - Option Exchange [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 5.13
Options Outstanding	995,256
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	5.04
Options Outstanding, Weighted Average Exercise Price	$ 5.13
Options Exercisable	374,020
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	4.56
Options Exercisable, Weighted Average Exercise Price	$ 5.13
$5.14 - $10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 5.14
Range of Exercise Prices, Maximum	$ 10.00
Options Outstanding	4,917,893
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	4.12
Options Outstanding, Weighted Average Exercise Price	$ 7.80
Options Exercisable	2,519,605
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	2.81
Options Exercisable, Weighted Average Exercise Price	$ 8.12
$10.01 - $15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 10.01
Range of Exercise Prices, Maximum	$ 15.00
Options Outstanding	960,634
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	1.97
Options Outstanding, Weighted Average Exercise Price	$ 11.30
Options Exercisable	940,525
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	1.96
Options Exercisable, Weighted Average Exercise Price	$ 11.29
$15.01 - $25.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 15.01
Range of Exercise Prices, Maximum	$ 25.00
Options Outstanding	2,275,635
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	0.082
Options Outstanding, Weighted Average Exercise Price	$ 20.63
Options Exercisable	2,275,635
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	0.82
Options Exercisable, Weighted Average Exercise Price	$ 20.63
$25.01 - 33.61 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Minimum	$ 25.01
Range of Exercise Prices, Maximum	$ 33.61
Options Outstanding	372,541
Options Outstanding, Weighted Average Remaining Contractual Life (in years)	1.66
Options Outstanding, Weighted Average Exercise Price	$ 31.60
Options Exercisable	372,541
Options Exercisable, Weighted Average Remaining Contractual Life (in years)	1.66
Options Exercisable, Weighted Average Exercise Price	$ 31.60