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Stock-Based Incentive Compensation Plans (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Narrative [Abstract]      
SARs liability $ 5 $ 1  
Payment for SARs exercised 1 0 0
2011-2013 Plan [Member]
     
Narrative [Abstract]      
Maximum Contractual Term (In Years)     10 years
Vesting period (in years)     3 years
Restricted stock units granted for certain of our executive officers (in shares)     221,813
Options granted for certain of our executive officers (in shares)     459,093
Performance shares granted for certain of our executive officers (in shares)     215,137
2012-2014 Plan [Member]
     
Narrative [Abstract]      
Maximum Contractual Term (In Years)   10 years  
Vesting period (in years)   3 years  
Percentage of target award opportunities, minimum   0.00%  
Percentage of target award opportunities, maximum   200.00%  
Restricted stock units granted for certain of our executive officers (in shares)   766,217  
Options granted for certain of our executive officers (in shares)   903,502  
Performance shares granted for certain of our executive officers (in shares)   306,456  
2013-2015 Plan [Member]
     
Narrative [Abstract]      
Maximum Contractual Term (In Years) 10 years    
Vesting period (in years) 3 years    
Percentage of target award opportunities, minimum 0.00%    
Percentage of target award opportunities, maximum 200.00%    
Restricted stock units granted for certain of our executive officers (in shares) 583,404    
Options granted for certain of our executive officers (in shares) 1,011,365    
Performance shares granted for certain of our executive officers (in shares) 260,114    
Stock options [Member] | 2011-2013 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers     33.00%
Stock options [Member] | 2012-2014 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers   35.00%  
Stock options [Member] | 2013-2015 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers 35.00%    
Stock options with performance conditions [Member]
     
Narrative [Abstract]      
Total fair value of options vested 1 1 2
Total intrinsic value of options exercised 1 0 0
Stock options with service conditions [Member]
     
Narrative [Abstract]      
Total fair value of options vested 6 4 7
Total intrinsic value of options exercised $ 6 $ 0 $ 0
Performance Shares [Member] | 2011-2013 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers     33.00%
Performance Shares [Member] | 2012-2014 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers   36.00%  
Performance Shares [Member] | 2013-2015 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers 36.00%    
Stock appreciation rights [Member]
     
Narrative [Abstract]      
Vesting period (in years) 4 years    
Percentage of SARs vesting each year over four-year period 25.00%    
Restricted stock units [Member] | 2011-2013 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers     34.00%
Restricted stock units [Member] | 2012-2014 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers   29.00%  
Restricted stock units [Member] | 2013-2015 Plan [Member]
     
Narrative [Abstract]      
Percentage of total awards granted during the year for participating executive officers 29.00%