Stock-Based Compensation (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Shares	17,886,318	21,723,381	28,167,011
Outstanding at beginning of year, Weighted-Average Exercise Price (per share)	$ 10.63	$ 10.81	$ 10.94
Options granted, Shares	4,586,666	0	3,442,586
Options granted, weighted-average exercise price (per share)	$ 2.05	$ 0.00	$ 2.80
Options exercised, shares	0	0	(430)
Options exercised, Weighted-Average Exercise Price (per share)	$ 0.00	$ 0.00	$ 2.21
Options forfeited, Shares	(174,842)	(471,386)	(150,003)
Options forfeited, Weighted-Average Exercise Price (per share)	$ 2.38	$ 10.72	$ 2.80
Options expired, Shares	(3,008,437)	(3,365,677)	(9,735,783)
Options expired, Weighted-Average Exercise Price (per share)	$ 12.36	$ 11.75	$ 8.48
Options outstanding at end of year, Shares	19,289,705	17,886,318	21,723,381
Options outstanding at end of year, Weighted-Average Exercise Price (per share)	$ 8.40	$ 10.63	$ 10.81
Options exercisable at end of year, Shares	13,296,595	14,365,773	16,879,440
Options exercisable at end of year, Weighted-Average Exercise Price (per share)	$ 10.94	$ 12.06	$ 12.14