Compensation Plans (Schedule of Status of Options Under Option Plan and Changes During the Year) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010	Dec. 31, 2009
Options, Outstanding, Number	65	72
Options, Outstanding, Weighted Average Exercise Price	$ 8.16	$ 10.79
Options, Grants in period	8	8	28
Options, Grants in Period, Weighted Average Exercise Price	$ 4.22
Options, Exercises in Period	(2)
Options, Exercises in Period, Weighted Average Exercise Price	$ 3.6
Options, Forfeitures and Expirations in Period	(13)
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ 22.37
Options, Outstanding, Weighted Average Remaining Contractual Term	6.19
Options, Outstanding, Intrinsic Value	$ 0
Options, Vested and Expected to Vest, Outstanding, Number	63
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 8.31
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	6.11
Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	0
Options, Exercisable, Number	39
Options, Exercisable, Weighted Average Exercise Price	$ 11.14
Options, Exercisable, Weighted Average Remaining Contractual Term	4.89
Options, Exercisable, Intrinsic Value	$ 0