Stock-Based Compensation (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Shares	19,289,705	17,886,318	21,723,381
Outstanding at beginning of year, Weighted-Average Exercise Price (per share)	$ 8.40	$ 10.63	$ 10.81
Options granted, Shares	6,003,250	4,586,666	0
Options granted, weighted-average exercise price (per share)	$ 2.52	$ 2.05	$ 0.00
Options exercised, shares	(455,767)	0	0
Options exercised, Weighted-Average Exercise Price (per share)	$ 2.47	$ 0.00	$ 0
Options forfeited, Shares	(364,075)	(174,842)	(471,386)
Options forfeited, Weighted-Average Exercise Price (per share)	$ 2.35	$ 2.38	$ 10.72
Options expired, Shares	(1,932,345)	(3,008,437)	(3,365,677)
Options expired, Weighted-Average Exercise Price (per share)	$ 8.98	$ 12.36	$ 11.75
Options outstanding at end of year, Shares	22,540,768	19,289,705	17,886,318
Options outstanding at end of year, Weighted-Average Exercise Price (per share)	$ 7.00	$ 8.40	$ 10.63
Options exercisable at end of year, Shares	13,994,362	13,296,595	14,365,773
Options exercisable at end of year, Weighted-Average Exercise Price (per share)	$ 9.82	$ 10.94	$ 12.06