Income Taxes - Reconciliation from United States Statutory Federal Income Tax Rate to Effective Income Tax Rate (Detail)	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Effective Income Tax Rate Reconciliation [Line Items]
Federal income tax rate	21.00%	21.00%	29.20%
State taxes, net of federal benefit	0.80%	1.00%	0.80%
Foreign earnings	5.90%	(1.10%)	(19.20%)
Foreign-derived intangible income benefit related to the Tax Act	(0.081)	0	0
Transition tax related to the Tax Act	0.00%	0.00%	43.30%
Remeasurement of deferred tax assets and liabilities related to the Tax Act	0.00%	0.00%	3.70%
Excess tax benefits from share-based compensation	(7.20%)	(3.60%)	(5.30%)
Income tax audits and contingency reserves	(1.40%)	1.30%	2.90%
U.S. research and development tax credit	(1.80%)	(1.00%)	(0.60%)
Other, net	2.90%	(1.50%)	0.50%
EFFECTIVE INCOME TAX RATE	12.10%	16.10%	55.30%
Withholding Taxes
Effective Income Tax Rate Reconciliation [Line Items]
Foreign earnings	6.50%
Held For Sale Accounting Items
Effective Income Tax Rate Reconciliation [Line Items]
Foreign earnings	2.90%
Statutory Rate Differences And Other Items
Effective Income Tax Rate Reconciliation [Line Items]
Foreign earnings	(3.50%)
Modification Of Treatment Of Certain Research And Development Expenditures
Effective Income Tax Rate Reconciliation [Line Items]
Income tax audits and contingency reserves	(2.90%)
Resolution Of IRS Audit And Other Matters
Effective Income Tax Rate Reconciliation [Line Items]
Income tax audits and contingency reserves	1.50%
Intra-Entity Transfers Of Inventory
Effective Income Tax Rate Reconciliation [Line Items]
Other, net	2.30%
Other Items
Effective Income Tax Rate Reconciliation [Line Items]
Other, net	0.60%