Retirement Plans - Schedule of Pension Plans Contributions (Details) - U.S. Plans [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Feb. 28, 2018	May 31, 2019	May 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 1,500	$ 1,000	$ 2,500
Required Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer			22
Voluntary Contribution [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer		$ 1,000	$ 2,478