XML 92 R77.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock-Based Employee Compensation - Schedule of Monte Carlo Assumption (Details) - Market-Based Restricted Stock Units - $ / shares
Jun. 15, 2016
Jun. 15, 2015
Jun. 15, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Estimated fair value (in dollars per share) $ 28.01 $ 33.08 $ 21.00
Expected volatility (percent) 46.90% 41.20% 34.60%
Expected term (in years) 1 year 9 months 18 days 1 year 9 months 18 days 1 year 9 months 18 days
Risk-free interest rate (percent) 0.70% 0.65% 0.38%
Dividend yield (percent) 0.00% 0.00% 0.00%