Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018	May 31, 2017
Income Tax Contingency [Line Items]
Federal income tax rate	21.00%	21.00%	29.20%
Effective tax rate, change from prior period		(5.50%)
Total gross unrecognized tax benefits, excluding related interest and penalties	$ 771	$ 808	$ 698	$ 461
Total gross unrecognized tax benefits, excluding related interest and penalties, amount which would affect the Company's effective tax rate if recognized in future periods	536
Increase (decrease) in liability for payment of interest and penalties	(16)	17	(14)
Accrued interest and penalties related to uncertain tax positions (excluding federal benefit)	158	174
Estimated decrease in total gross unrecognized tax benefits as a result of resolutions of global tax examinations and expiration of applicable statutes of limitations	$ 50
Tax holiday, expiration period	2021
Decrease in income tax expense related to tax holiday	$ 238	$ 167	$ 126
Decrease in income tax expense related to tax holiday per diluted share, (in dollars per share)	$ 0.15	$ 0.10	$ 0.08
Valuation allowance increase (decrease) related to tax benefits of certain subsidiaries with operating losses	$ (62)	$ (7)	$ 13
Deferred tax assets, tax credit carryforwards, foreign	15
Available domestic and foreign loss carry-forwards	83
Deferred income taxes and other liabilities
Income Tax Contingency [Line Items]
Long-term income taxes payable	757	$ 902
NETHERLANDS
Income Tax Contingency [Line Items]
Undistributed earnings of foreign subsidiaries	8,100
Withholding taxes that would be payable upon remittance of undistributed earnings	$ 1,200