Debt, Derivatives and Hedging Activities - Narrative (Details) - USD ($)	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	May 31, 2023
Debt Instrument [Line Items]
Debt, carrying value	$ 2,490,000,000		$ 2,500,000,000
Debt, fair value	2,396,500,000		2,443,800,000
Issuance of commercial paper		$ 196,000,000
Amortization of interest rate lock agreements - decrease to other comprehensive income (loss)	1,400,000	$ 1,500,000
Notional value	500,000,000		500,000,000
Commercial paper
Debt Instrument [Line Items]
Commercial paper	0		0
Senior Notes, 6.15%, 2037 Maturity | Senior notes
Debt Instrument [Line Items]
Repayment of debt	$ 10,000,000
Stated interest rate	6.15%
Debt term	30 years
Loss recognized	$ 800,000
Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity with accordion feature	2,000,000,000
Debt amendment, increase limit (up to)	500,000,000
Revolving credit facility amount outstanding	$ 0		$ 0