Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 192	$ 129	$ 164
Increases for tax positions taken in the current year	14	3	3
Increases for tax positions taken in prior years	8	69	4
Decreases for tax positions taken in prior years	(15)	(6)	(10)
Settlements	(32)	(6)	(31)
Changes due to currency translation	2	3	(1)
Balance at end of year	$ 169	$ 192	$ 129