Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Valuation Assumptions) (Details)

v3.10.0.1
Stock-Based Compensation (Valuation Assumptions) (Details)
6 Months Ended
Jun. 30, 2018
$ / shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Grant date strike price (in dollars per share) $ 61.40
Expected volatility 22.72%
Expected life 4 years 3 months
Risk-free interest rate 1.63%
Projected dividend yield 2.73%