Debt and Receivables Securitization - Summary of Long-term Debt and Short-term Borrowings Outstanding (Detail) - USD ($) $ in Thousands	May 31, 2019	May 31, 2018
Debt Instrument [Line Items]
Debt	$ 753,100
Total debt	753,100	$ 754,728
Unamortized discount and debt issuance costs	(3,801)	(4,360)
Total debt, net	749,299	750,368
Less: current maturities and short-term borrowings	150,943	1,474
Total long-term debt	598,356	748,894
4.30% Senior Notes due August 1, 2032
Debt Instrument [Line Items]
Senior notes	200,000	200,000
4.55% Senior Notes due April 15, 2026
Debt Instrument [Line Items]
Senior notes	250,000	250,000
4.60% Senior Notes due August 10, 2024
Debt Instrument [Line Items]
Senior notes	150,000	150,000
6.50% Senior Notes due April 15, 2020
Debt Instrument [Line Items]
Senior notes	150,000	150,000
Term Loans
Debt Instrument [Line Items]
Debt		829
Other Debt
Debt Instrument [Line Items]
Debt	$ 3,100	$ 3,899

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of unamortized debt discount (premium) and debt issuance costs.

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Debt long-term and short-term combined amount net of unamortized discount and debt issue costs.

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