Employee Benefit And Retirement Plans-Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | |
---|---|---|---|
May 31, 2017 |
May 31, 2016 |
Nov. 30, 2015 |
|
Compensation and Retirement Disclosure [Abstract] | |||
Pension Contributions | $ 8.5 | $ 9.6 | $ 25.1 |