Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020	May 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long term debt	$ 10,320		$ 10,320		$ 10,645
Short-term Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities with maturity dates within one year from purchase date	3,443		3,443
Available-for-sale securities with maturity dates over one year and less than five years from purchase date	569		569
Interest (income) expense, net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest income related to cash and equivalents and short-term investments	$ 8	$ 16	$ 21	$ 51