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Stock Compensation Plans (Narrative) (Details)
12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
RSU's [Member]
Dec. 31, 2010
RSU's [Member]
Dec. 31, 2011
2010 Plan [Member]
Feb. 28, 2010
2007-2009 Cycle (Cycle VII) [Member]
Dec. 31, 2011
2007-2009 Cycle (Cycle VII) [Member]
Dec. 31, 2011
Long-Term Incentive Plan [Member]
Mar. 31, 2011
2008-2010 Cycle (Cycle VIII) [Member]
Dec. 31, 2011
2009-2011 Cycle (Cycle IV) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Shares subject to outstanding awards     2,518,548          
Vesting period, in years 3 years       3 years three    
Shares authorized for issuance     2,749,669          
Shares remaining available for issuance     749,669          
Shares awarded 782,000 867,000            
Shares remaining available for future awards     1,984,627          
Target payout percentage, cash           50.00%    
Target payout percentage, stock           50.00%    
Unrecognized compensation cost related to non-vested stock options and SSAR, RSU, PRS and Cash RSU awards granted, weighted average period, in years 1.7              
Period of recognition of compensation expenses (years) 1.7              
Shares of common stock issued       53,378,000     78,072 128,293,000
Percentage of target dollar value of the award converted to a number of notional shares         50.00%