XML 79 R65.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation - Stock Award Information and Fair Value Assumptions (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Stock-based compensation      
Unrecognized compensation cost related to stock options $ 40.3    
Stock-based compensation expense      
Total stock-based compensation cost 27.5 $ 20.7 $ 16.5
Income tax benefit $ 10.6 12.5  
Weighted average period of recognition of unrecognized compensation cost related to stock options 1 year 9 months 18 days    
Executive Incentive Program      
Stock-based compensation      
Shares reserved for grant under the plan (in shares) 4,200,000    
Shares available for grant under the plan (in shares) 1,800,000    
Stock options - annual equity grant      
Stock-based compensation      
Stock options granted (in shares) 383,000    
Weighted-average assumptions used to estimate grant date fair value of stock options      
Expected dividend yield (as a percent) 1.40%    
Expected life in years 5 years 6 months    
Expected volatility (as a percent) 23.10%    
Risk-free interest rate (as a percent) 2.60%    
Weighted average grant date fair value (in dollars per share) $ 23.71    
Fair value of options granted $ 9.1    
Stock options, one-time grant      
Stock-based compensation      
Stock options granted (in shares) 621,000    
Weighted-average assumptions used to estimate grant date fair value of stock options      
Expected dividend yield (as a percent) 1.40%    
Expected life in years 3 years 10 months 24 days    
Expected volatility (as a percent) 20.70%    
Risk-free interest rate (as a percent) 2.60%    
Weighted average grant date fair value (in dollars per share) $ 21.91    
Fair value of options granted $ 13.6    
Stock option awards      
Stock-based compensation      
Stock options granted (in shares) 1,004,000    
Unrecognized compensation cost related to stock options $ 14.1    
Stock-based compensation expense      
Total stock-based compensation cost $ 11.0 $ 7.7 $ 6.1
Vesting period 3 years    
Maximum term life 10 years    
Weighted-average assumptions used to estimate grant date fair value of stock options      
Expected dividend yield (as a percent)   1.30% 1.40%
Expected life in years   5 years 7 months 6 days 5 years 7 months 6 days
Expected volatility (as a percent)   25.60% 27.50%
Risk-free interest rate (as a percent)   1.90% 1.40%
Weighted average grant date fair value (in dollars per share)   $ 24.57 $ 19.30
Fair value of options granted   $ 8.8 $ 7.2
Restricted stock awards      
Stock-based compensation      
Awards granted (in shares) 76,000    
Unrecognized compensation cost related to stock options $ 8.0    
Stock-based compensation expense      
Total stock-based compensation cost $ 7.7 6.0 4.5
Vesting period 3 years    
Weighted average period of recognition of unrecognized compensation cost related to stock options 1 year 7 months 6 days    
Performance share awards      
Stock-based compensation      
Awards granted (in shares) 54,000    
Unrecognized compensation cost related to stock options $ 5.6    
Stock-based compensation expense      
Total stock-based compensation cost $ 7.4 $ 5.6 $ 4.7
Vesting period 3 years    
Weighted average period of recognition of unrecognized compensation cost related to stock options 1 year 8 months 12 days    
Restricted Stock Units      
Stock-based compensation      
Awards granted (in shares) 13,000 13,000 14,000
Stock-based compensation expense      
Total stock-based compensation cost $ 1.4 $ 1.4 $ 1.2
Q2 2018 Stock option and stock appreciation right grant      
Stock-based compensation expense      
Total stock-based compensation cost 2.7    
Stock compensation cost capitalized as inventory $ 0.5