Stock Based Compensation Plans (Range of exercise price) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Range of Exercise Price
Total Outstanding, Number of shares	13,412
Total Outstanding, Weighted Average Exercise Price	$ 76.05
Total Outstanding, Weighted Average Remaining Life (Years)	8 months 9 days
Exercisable, Numer of shares	13,412
Exercisable, Weighted Average Exercise Price	$ 76.05
Intrinsic value of stock options exercised	$ 0	$ 0	$ 0
Fair value of the options vested	$ 0	$ 0	$ 0
$44.17 - $63.33
Range of Exercise Price
Total Outstanding, Number of shares	9,501
Total Outstanding, Weighted Average Exercise Price	$ 54.00
Total Outstanding, Weighted Average Remaining Life (Years)	4 months 13 days
Exercisable, Numer of shares	9,501
Exercisable, Weighted Average Exercise Price	$ 54.00
Exercise price per share, lower limit	$ 44.17		$ 27.94
Exercise price per share, upper limit	$ 63.33		$ 132.00
$120.83 - $140.00
Range of Exercise Price
Total Outstanding, Number of shares	3,911
Total Outstanding, Weighted Average Exercise Price	$ 129.60
Total Outstanding, Weighted Average Remaining Life (Years)	1 year 5 months 9 days
Exercisable, Numer of shares	3,911
Exercisable, Weighted Average Exercise Price	$ 129.60
Exercise price per share, lower limit	$ 120.83
Exercise price per share, upper limit	$ 140.00