XML 18 R46.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
May 01, 2014
2014 Incentive Plan
Jun. 30, 2014
Supplemental Employee Incentive Plan IV
Jun. 30, 2013
Supplemental Employee Incentive Plan IV
Jun. 30, 2014
Supplemental Employee Incentive Plan IV
Jun. 30, 2013
Supplemental Employee Incentive Plan IV
Jun. 30, 2014
Restricted Stock Awards
Jun. 30, 2014
Restricted Stock Units
Jun. 30, 2014
Performance Share Awards
Minimum
Jun. 30, 2014
Performance Share Awards
Maximum
Jun. 30, 2014
Performance Share Awards Based on Internal Performance Metrics
Maximum
Jun. 30, 2014
Employee Performance Share Awards
Jun. 30, 2014
Hybrid Performance Share Awards
Jun. 30, 2014
Performance Shares Based on Market Conditions
Maximum
Feb. 20, 2014
TSR Performance Share Awards
Jun. 30, 2014
TSR Performance Share Awards
item
May 01, 2014
Stock options
2014 Incentive Plan
Maximum
Stock-based Compensation arrangements                                        
Number of additional shares that will be issued under any of the Company's prior plans, including the 2004 Incentive Plan 0   0                                  
Stock based compensation expense $ 6.3 $ 10.0 $ 9.4 $ 28.7   $ 1.6 $ 1.7 $ 3.1 $ 5.1                      
Tax benefits realized for stock-based compensation     20.4 7.3                                
Granted (in shares)                   46,000 34,071       241,130 123,257     184,885  
Granted (in dollars per share)                   $ 34.96 $ 38.97       $ 39.43 $ 39.43        
Number of years over which performance criteria is to be met                             3 years       3 years  
Annual forfeiture rate assumption (as a percent)                   5.00%   0.00% 5.00%              
Right to receive shares (as a percent)                           100.00%     100.00%      
Vesting rights                               The 2014 awards vest 25% on each of the first and second anniversary dates and 50% on the third anniversary        
Minimum operating cash flow for the year preceding the performance period                               $ 100        
Right to receive additional shares (as a percent)                                 100.00%      
Number of other companies in the Company's peer group                                     14  
Assumptions                                        
Fair value per performance share award (in dollars per share)                                   $ 32.04    
Fair value per performance share award Assumptions, low end of range (in dollars per share)                                     $ 5.94  
Fair value per performance share award Assumptions, high end of range (in dollars per share)                                     $ 21.77  
Stock price volatility (as a percent)               36.00%                   41.30%    
Stock Price Volatility, low end of range (as a percent)                                     29.70%  
Stock Price Volatility, high end of range (as a percent)                                     102.70%  
Risk free rate of return (as a percent)               1.00%                   0.70%    
Risk free rate of return, low end of range (as a percent)                                     0.10%  
Risk free rate of return, high end of range (as a percent)                                     0.70%  
Expected dividend yield (as a percent)                                   0.20% 0.20%  
Annual salary increase rate (as a percent)               4.00%                        
Annual turnover rate               4.60%                        
Number of shares reserved for issuance         18,000,000                             10,000,000