XML 129 R114.htm IDEA: XBRL DOCUMENT v3.19.2
Share-based Compensation (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 25, 2018
Dec. 31, 2018
USD ($)
$ / shares
Rate
shares
Dec. 31, 2017
USD ($)
$ / shares
Rate
shares
Dec. 31, 2016
USD ($)
$ / shares
Rate
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Distribution ratio 0.935301        
Number of shares of common stock authorized for issuance under the plan (in shares)   30,200,000      
Capital shares reserved for future issuance (in shares)   4,900,000      
Share-based payment award, expiration period   10 years      
Share-based compensation expense, after-tax | $   $ 17.7 $ 13.7 $ 12.7  
Tax benefit from compensation expense | $   4.8 7.4 7.5  
Cash related stock options exercises | $   10.7 22.5 4.1  
Excess tax benefits from share-based compensation | $   3.8 2.9 (0.4)  
Discontinued Operations          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense, after-tax | $   $ 4.0 4.4 0.0  
Employee Stock Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Awards vesting period   3 years      
Share-based payment award, expiration period   10 years      
Share-based compensation expense, after-tax | $   $ 4.9 4.5 4.4  
Tax benefit from compensation expense | $   $ 1.3 $ 2.4 $ 2.6  
Fair value assumptions, forfeiture rate   4.00%      
Black Scholes valuation assumptions for stock option grants [Abstract]          
Expected dividend yield | Rate   0.77% 1.15% 1.77%  
Expected volatility | Rate   26.85% 27.04% 26.57%  
Expected life (in years)   6 years 6 months 6 years 6 months 6 years 6 months  
Risk-free interest rate | Rate   2.79% 2.10% 1.39%  
Stock Option Outstanding (shares) [Roll Forward]          
Beginning (in shares)   2,435,000 2,749,000 2,071,000  
Granted (in shares)   250,000 370,000 933,000  
Exercised (in shares)   (260,000) (590,000) (171,000)  
Forfeited (in shares)   (61,000) (94,000) (84,000)  
Ending (in shares)   2,364,000 2,435,000 2,749,000 2,071,000
Options exercisable (in shares)   1,044,000 920,000 1,292,000 1,200,000
Options vested and expected to vest (in shares)   1,287,000 1,452,000 1,373,000 832,000
Options outstanding, weighted-average remaining contractual life (in years)   6 years 6 years 3 months 18 days 6 years 1 month 6 days 5 years 7 months 6 days
Stock Options Outstanding, Weighted Average Exercise Price (dollars per share) [Abstract]          
Beginning (in dollars per share) | $ / shares   $ 48.37 $ 45.34 $ 47.52  
Granted (in dollars per share) | $ / shares   85.19 57.63 37.39  
Exercised (in dollars per share) | $ / shares   41.80 39.93 25.59  
Forfeited (in dollars per share) | $ / shares   52.51 49.10 51.17  
Ending (in dollars per share) | $ / shares   $ 52.87 $ 48.37 $ 45.34 $ 47.52
Options outstanding, aggregate intrinsic value | $   $ 52.5 $ 112.7 $ 37.6 $ 8.7
Options exercised, aggregate intrinsic value | $   $ 11.7 $ 20.1 $ 3.5  
Stock Option Additional Disclosures [Abstract]          
Options granted, weighted-average grant-date fair value (in dollars per share) | $ / shares   $ 25.70 $ 15.66 $ 8.54  
Options exercisable, intrinsic value | $   $ 19.4      
Options exercisable, weighted-average remaining contractual term (in years)   4 years      
Options exercisable, weighted-average exercise price per share (in dollars per share) | $ / shares   $ 55.43      
Unrecognized compensation cost | $   $ 5.4      
Unrecognized compensation cost, weighted-average period of recognition (in years)   1 year 6 months 21 days      
Restricted Stock Units (RSUs) related to Directors          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares of common stock credited to directors' accounts for RSUs (in shares)   248,465 228,366    
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Awards vesting period   3 years      
Share-based compensation expense, after-tax | $   $ 8.4 $ 6.4 $ 6.5  
Tax benefit from compensation expense | $   $ 2.3 $ 3.5 $ 3.8  
Fair value assumptions, forfeiture rate   2.00%      
Stock Option Additional Disclosures [Abstract]          
Unrecognized compensation cost | $   $ 14.0      
Unrecognized compensation cost, weighted-average period of recognition (in years)   1 year 7 months 24 days      
Nonvested Restricted Awards (shares) [Roll Forward]          
Nonvested awards, beginning (in shares)   489,000 496,000 376,000  
Granted (in shares)   137,000 121,000 271,000  
Vested (in shares)   (154,000) (98,000) (120,000)  
Forfeited (in shares)   (13,000) (30,000) (31,000)  
Nonvested awards, ending (in shares)   459,000 489,000 496,000 376,000
Nonvested Awards, Weighted Average Grant Date Fair Value (dollars per share) [Abstract]          
Nonvested awards, beginning (in dollars per share) | $ / shares   $ 47.63 $ 48.56 $ 57.36  
Granted (in dollars per share) | $ / shares   84.94 57.66 37.44  
Vested (in dollars per share) | $ / shares   55.14 64.75 56.12  
Forfeited (in dollars per share) | $ / shares   65.39 47.60 52.67  
Nonvested awards, ending (in dollars per share) | $ / shares   $ 55.75 $ 47.63 $ 48.56 $ 57.36
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense, after-tax | $   $ 4.4 $ 2.8 $ 1.8  
Tax benefit from compensation expense | $   $ 1.2 $ 1.5 $ 1.1  
Nonvested Restricted Awards (shares) [Roll Forward]          
Nonvested awards, beginning (in shares)   260,000 158,000 32,000  
Granted (in shares)   133,000 105,000 126,000  
Vested (in shares)   (58,000) 0 0  
Forfeited (in shares)   0 (3,000) 0  
Nonvested awards, ending (in shares)   335,000 260,000 158,000 32,000
Nonvested Awards, Weighted Average Grant Date Fair Value (dollars per share) [Abstract]          
Nonvested awards, beginning (in dollars per share) | $ / shares   $ 53.36 $ 49.55 $ 81.06  
Granted (in dollars per share) | $ / shares   88.65 66.93 41.66  
Vested (in dollars per share) | $ / shares   81.15 0 0  
Forfeited (in dollars per share) | $ / shares   0 52.74 0  
Nonvested awards, ending (in dollars per share) | $ / shares   $ 56.42 $ 53.36 $ 49.55 $ 81.06