Fair Value Disclosures (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 493,640	$ 145,402
Other assets, net:
Interest rate lock agreements	40,400	1,546
Total assets at fair value	534,040	146,948
Long-term accrued liabilities:
Interest rate lock agreements	61,567	165,686
Total liabilities at fair value	61,567	165,686
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	493,640	145,402
Other assets, net:
Interest rate lock agreements	0	0
Total assets at fair value	493,640	145,402
Long-term accrued liabilities:
Interest rate lock agreements	0	0
Total liabilities at fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Other assets, net:
Interest rate lock agreements	40,400	1,546
Total assets at fair value	40,400	1,546
Long-term accrued liabilities:
Interest rate lock agreements	61,567	165,686
Total liabilities at fair value	61,567	165,686
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Other assets, net:
Interest rate lock agreements	0	0
Total assets at fair value	0	0
Long-term accrued liabilities:
Interest rate lock agreements	0	0
Total liabilities at fair value	$ 0	$ 0