Retirement Plans - Schedule of Pension Plans Contributions (Details) - U.S. Plans [Member] - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 300	$ 1,000
Voluntary Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 300	$ 1,000