Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Stock-Based Compensation [Abstract]

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

	Units Attributable to SVAs (in thousands)
Outstanding at January 1, 2009	1,903
Granted	1,416
Forfeited or expired	(559)
Outstanding at December 31, 2009	2,760
Granted	1,987
Issued	(365)
Forfeited or expired	(745)
Outstanding at December 31, 2010	3,637
Granted	1,830
Issued	(428)
Forfeited or expired	(740)
Outstanding at December 31, 2011	4,299

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Shares of Common Stock Attributable to Options (in thousands)	Weighted-Average Exercise Price of Options	Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at January 1, 2011	55,507	$69.04
Exercised	(18)	24.33
Forfeited or expired	(18,933)	74.56
Outstanding at December 31, 2011	36,556	66.22	1.8	$1.2
Exercisable at December 31, 2011	36,556	66.22	1.8	1.2