Stock-Based Compensation And Other Employee Benefit Plans (Summary Of Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years		Dec. 31, 2010 years		Dec. 31, 2009 years
Stock-Based Compensation And Other Employee Benefit Plans [Abstract]
Stock Options Outstanding - Beginning Balance	2,588,170		2,875,669
Weighted Average Exercise Price - Options Outstanding - Beginning Balance	$ 10.27		$ 10.42
Weighted Average Remaining Contractual Life (years) - Options Outstanding - Beginning Balance	3.87		4.93
Aggregate Intrinsic Value - Options Outstanding - Beginning Balance	$ 11.2	[1]	$ 7.5	[1]
Stock Options - Exercised	(1,132,396)		(231,599)
Weighted Average Exercise Price - Options Exercised	$ 10.25		$ 11.23
Stock Options - Canceled/forfeited	(10,000)		(55,900)
Weighted Average Exercise Price - Options Canceled/forfeited	$ 13.95		$ 13.94
Aggregate Intrinsic Value - Exercised	10.3		0.8		1.6
Stock Options - Exercisable	1,445,774		2,583,170
Weighted Average Exercise Price - Options Exercisable	$ 10.25		$ 10.26
Weighted Average Remaining Contractual Life (years) - Exercisable	3.16		3.87
Aggregate Intrinsic Value - Exercisable	10.3	[1]	11.2	[1]
Stock Options Outstanding - Ending Balance	1,445,774		2,588,170		2,875,669
Weighted Average Exercise Price - Options Outstanding - Ending Balance	$ 10.25		$ 10.27		$ 10.42
Weighted Average Remaining Contractual Life (years) - Options Outstanding - Ending Balance	3.16		3.87		4.93
Aggregate Intrinsic Value - Options Outstanding - Ending Balance	$ 10.3	[1]	$ 11.2	[1]	$ 7.5	[1]

[1] Amount represents the difference between the exercise price and the market price of the Company's stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.