Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 212	$ 169	$ 192
Increases for tax positions taken in the current year	5	3	14
Increases for tax positions taken in prior years	4	68	8
Decreases for tax positions taken in prior years	(3)	(7)	(15)
Settlements	(31)	(15)	(32)
Changes due to currency translation	(1)	(6)	2
Balance at end of year	$ 186	$ 212	$ 169