Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Valuation Assumptions) (Details)

v3.20.2
Stock-Based Compensation (Valuation Assumptions) (Details) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Grant date fair value (in dollars per share)   $ 8.59 $ 10.46
Grant date strike price (in dollars per share)   $ 53.40 $ 52.44
Expected volatility 22.24% 24.30%  
Expected life 6 years 3 months 4 years 3 months  
Risk-free interest rate 2.63% 1.21%  
Projected dividend yield 2.21% 2.40%