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Stock Compensation Plans (Weighted-average remaining contractual lives of stock options outstanding) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding - Number Outstanding 21,641
Options Outstanding - Weighted Average Remaining Contract Life (in years) 4.1
Options Outstanding - Weighted Average per Share Exercise Price $ 21
Options Exercisable - Number Exercisable 18,845
Options Exercisable - Weighted Average Per Share Exercise Price $ 23
$0.01 to $11.00 [Member]
  
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 0.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 11
Options Outstanding - Number Outstanding 2,683
Options Outstanding - Weighted Average Remaining Contract Life (in years) 6.5
Options Outstanding - Weighted Average per Share Exercise Price $ 10
Options Exercisable - Number Exercisable 2,242
Options Exercisable - Weighted Average Per Share Exercise Price $ 11
$11.01 to $18.00 [Member]
  
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 11.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 18
Options Outstanding - Number Outstanding 8,314
Options Outstanding - Weighted Average Remaining Contract Life (in years) 4.9
Options Outstanding - Weighted Average per Share Exercise Price $ 12
Options Exercisable - Number Exercisable 5,959
Options Exercisable - Weighted Average Per Share Exercise Price $ 12
$18.01 to $25.00 [Member]
  
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 18.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 25
Options Outstanding - Number Outstanding 3,830
Options Outstanding - Weighted Average Remaining Contract Life (in years) 1.9
Options Outstanding - Weighted Average per Share Exercise Price $ 22
Options Exercisable - Number Exercisable 3,830
Options Exercisable - Weighted Average Per Share Exercise Price $ 22
$25.01 to $35.00 [Member]
  
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 25.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 35
Options Outstanding - Number Outstanding 3,949
Options Outstanding - Weighted Average Remaining Contract Life (in years) 3.9
Options Outstanding - Weighted Average per Share Exercise Price $ 31
Options Exercisable - Number Exercisable 3,949
Options Exercisable - Weighted Average Per Share Exercise Price $ 31
$35.01 to $60.00 [Member]
  
Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 35.01
Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 60
Options Outstanding - Number Outstanding 2,865
Options Outstanding - Weighted Average Remaining Contract Life (in years) 3.1
Options Outstanding - Weighted Average per Share Exercise Price $ 44
Options Exercisable - Number Exercisable 2,865
Options Exercisable - Weighted Average Per Share Exercise Price $ 44