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Borrowings - Description of Long Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 15, 2022 | Aug. 01, 2022 | Feb. 21, 2020 | May 31, 2023 | May 31, 2022 | Feb. 27, 2019 | Dec. 20, 2017 | Mar. 31, 2017 | Mar. 02, 2017 | May 29, 2015
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, due date | [1] |  |  |  | Aug. 01, 2027 |  | Aug. 01, 2027 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 2.8 |  | $ 1.5 |  |  |  |  |  |
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 6.20% |  |  |  |  |  |  |  |
Unsecured Term Loan due August 1, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, due date |  |  |  |  | Aug. 01, 2025 |  | Aug. 01, 2025 |  |  |  |  |  |
Unsecured 3.45% senior notes due November 15, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  | 3.45% |  |  | 3.45% | [2] | 3.45% | [2] |  |  |  |  |
Debt, due date | [2] |  |  |  | Nov. 15, 2022 |  | Nov. 15, 2022 |  |  |  |  |  |
Repayment of aggregate principal amount outstanding |  | $ 300.0 |  |  |  |  |  |  |  |  |  |  |
Unsecured 3.75% notes due March 15, 2027 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 400.0 |  | $ 400.0 |  |  |  |  | $ 400.0 |
Debt, interest rate |  |  |  |  | 3.75% | [3] | 3.75% | [3] |  |  |  | 3.75% |
Debt, due date | [3] |  |  |  | Mar. 15, 2027 |  | Mar. 15, 2027 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 1.5 |  | $ 1.9 |  |  |  |  |  |
Amortization of debt discount premium |  |  |  |  | $ 0.2 |  | $ 0.3 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  |  | 3.767% |  | 3.767% |  |  |  |  |  |
Unsecured 4.55% senior notes due March 1, 2029 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 350.0 |  | $ 350.0 |  | $ 350.0 |  |  |  |
Debt, interest rate |  |  |  |  | 4.55% | [4] | 4.55% | [4] | 4.55% |  |  |  |
Debt, due date | [4] |  |  |  | Mar. 01, 2029 |  | Mar. 01, 2029 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 2.0 |  | $ 2.3 |  |  |  |  |  |
Amortization of debt discount premium |  |  |  |  | $ 0.3 |  | $ 0.4 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  |  | 4.568% |  | 4.568% |  |  |  |  |  |
Unsecured 2.95% notes due January 15, 2032 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  | $ 300.0 |  |  |  |  |  |
Debt, interest rate | [5] |  |  |  | 2.95% |  | 2.95% |  |  |  |  |  |
Debt, due date | [5] |  |  |  | Jan. 15, 2032 |  | Jan. 15, 2032 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 2.6 |  | $ 2.9 |  |  |  |  |  |
Amortization of debt discount premium |  |  |  |  | $ 0.6 |  | $ 0.6 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  |  | 2.976% |  | 2.976% |  |  |  |  |  |
Unsecured 5.25% notes due June 1, 2045 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  | $ 50.0 | $ 250.0
Debt, interest rate |  |  |  |  | 5.25% | [6] | 5.25% | [6] |  |  |  | 5.25% | 5.25%
Debt, due date | [6] |  |  |  | Jun. 01, 2045 |  | Jun. 01, 2045 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 2.5 |  | $ 2.6 |  |  |  |  |  |
Amortization of debt discount premium |  |  |  |  | $ 1.3 |  | $ 1.3 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  |  | 5.29% |  | 5.29% |  |  |  |  |  |
Accounts Receivable Securitization Program with Two Banks, through May 21, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, due date | [7] |  |  |  | May 21, 2024 |  | May 21, 2024 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 0.1 |  |  |  |  |  |  |  |
Other Borrowings |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, maturity year |  |  |  |  | 2028 |  | 2028 |  |  |  |  |  |
Unsecured 4.25% notes due January 15, 2048 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 300.0 |  | $ 300.0 |  |  | $ 300.0 |  |  |
Debt, interest rate |  |  |  |  | 4.25% | [8] | 4.25% | [8] |  | 4.25% |  |  |
Debt, due date | [8] |  |  |  | Jan. 15, 2048 |  | Jan. 15, 2048 |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 3.0 |  | $ 3.2 |  |  |  |  |  |
Debt instrument, effective interest rate |  |  |  |  | 4.25% |  | 4.25% |  |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, due date |  |  | Aug. 01, 2025 | Feb. 21, 2023 |  |  |  |  |  |  |  |  |
Debt issuance costs, net of amortization |  |  |  |  | $ 0.2 |  | $ 0.2 |  |  |  |  |  |
United States Dollar Denominated Swingline Account | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 6.26% |  |  |  |  |  |  |  |
Outstanding debt |  |  |  |  | $ 8.2 |  | $ 37.7 |  |  |  |  |  |
United States Dollar Denominated Swingline Account | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  |  |  | 2.3699% |  |  |  |  |  |
United States Dollar Denominated Revolver | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 6.36% |  |  |  |  |  |  |  |
Outstanding debt |  |  |  |  | $ 30.0 |  | $ 60.0 |  |  |  |  |  |
United States Dollar Denominated Revolver | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  |  |  | 2.3096% |  |  |  |  |  |
Australian Dollar Denominated Debt | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 4.92% |  |  |  |  |  |  |  |
Outstanding debt |  |  |  |  | $ 1.2 |  |  |  |  |  |  |  |
Euro Denominated Debt | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 4.2926% |  |  |  |  |  |  |  |
Outstanding debt |  |  |  |  | $ 527.6 |  | $ 346.1 |  |  |  |  |  |
Euro Denominated Debt | Revolving Credit Facility | EUR LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  |  |  | 1.25% |  |  |  |  |  |
GBP Denominated Debt | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, interest rate |  |  |  |  | 5.5607% |  |  |  |  |  |  |  |
Outstanding debt |  |  |  |  | $ 46.7 |  |  |  |  |  |  |  |
Initial Aggregate Principal | Unsecured 5.25% notes due June 1, 2045 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | 250.0 |  | $ 250.0 |  |  |  |  |  |
Additional Aggregate Principal | Unsecured 5.25% notes due June 1, 2045 |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  | $ 50.0 |  | 50.0 |  |  |  | $ 50.0 |  |
Debt instrument, effective interest rate |  |  |  |  | 4.839% |  |  |  |  |  | 4.839% |  |
Unamortization of debt premium |  |  |  |  | $ 2.7 |  | $ 2.8 |  |  |  |  |  |
[1] | Interest as of May 31, 2023 was 6.2600% for the USD denominated swingline account, which is tied to SOFR; 6.3600% for the USD denominated revolver, which is tied to SOFR; 4.2926% on EUR denominated debt which is tied to ESTR; 5.5607% on GBP denominated debt, which is tied to the Sterling Overnight Index Average; and 4.9200% on AUD denominated debt, which is tied to the Reserve Bank of Australia rate. The debt balances outstanding, excluding deferred financing fees, as of May 31, 2023 for the USD denominated swingline, USD denominated revolver, EUR denominated revolver, GBP denominated debt, and AUD denominated debt were as follows: $8.2 million, $30.0 million, $527.6 million, $46.7 million, and $1.2 million. Interest as of May 31, 2022 was tied to LIBOR and was 2.3699% for the USD denominated swingline account, 2.3096% for the USD denominated revolver and 1.25% on EUR denominated debt. The debt balances outstanding excluding deferred financing fees as of May 31, 2022, for the USD denominated swingline, USD denominated revolver, and EUR denominated revolver were as follows: $37.7 million, $60.0 million, and $346.1 million. As of May 31, 2023 and 2022, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $1.5 million, respectively.
[2] | On November 15, 2022, we repaid the $300.0 million aggregate principal amount outstanding on our 3.45% Notes due 2022.
[3] | The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2023 and 2022, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2023 and 2022, the notes are adjusted for debt issuance costs, net of amortization, for approximately $1.5 million and $1.9 million, respectively.
[4] | The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.3 million and $0.4 million at May 31, 2023 and 2022, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568%. At May 31, 2023 and 2022, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.0 million and $2.3 million, respectively.
[5] | The $300.0 million face amount of the notes due 2032 is adjusted for the amortization of the original issue discount, which approximated $0.6 million at May 31, 2023 and 2022. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 2.976%. At May 31, 2023 and 2022, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $2.9 million, respectively.
[6] | The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.3 million at May 31, 2023 and 2022. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.7 million and $2.8 million at May 31, 2023 and 2022, respectively. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2023 and 2022, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.5 million and $2.6 million, respectively.
[7] | As of May 31, 2023, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.1 million.
[8] | The $300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $3.0 million and $3.2 million at May 31, 2023 and 2022, respectively. The effective interest rate on the notes is 4.25%.

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