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Debt, Derivatives and Hedging Activities - Narrative (Details) - USD ($) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
May 01, 2025 | Apr. 15, 2025 | May 31, 2026 | May 31, 2025 | May 31, 2024 | Mar. 27, 2026 | May 02, 2025
Debt Instrument [Line Items] |  |  |  |  |  |  |
Average interest rate |  |  | 4.10% |  |  |  |
Debt carrying value |  |  | $ 2,436,600,000 | $ 2,436,600,000 |  |  |
Debt fair value |  |  | 2,425,200,000 | 2,404,700,000 |  |  |
Letters of credit outstanding, amount |  |  | 125,800,000 | 129,600,000 |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Maturities of long term debt, year one |  |  | 1,000,000,000 |  |  |  |
Maturities of long term debt, year two |  |  | 400,000,000.0 |  |  |  |
Maturities of long term debt, year three |  |  | 0.0 |  |  |  |
Maturities of long term debt, year four |  |  | 0.0 |  |  |  |
Maturities of long term debt, year five |  |  | 0.0 |  |  |  |
Interest paid |  |  | 106,200,000 | 101,600,000 | $ 100,800,000 |  |
Amortization of debt issuance costs |  |  | 4,800,000 | 3,500,000 | 3,600,000 |  |
Notional amount |  |  | 500,000,000.0 | 500,000,000.0 |  |  |
Commercial paper |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Debt due within one year |  |  | 0 | 0 |  |  |
Other comprehensive Income |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Amortization of interest rate lock agreements - decrease to other comprehensive income |  |  | 6,100,000 | 6,100,000 | $ 6,000,000.0 |  |
Revolving Credit Facility |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity with accordion feature |  |  |  |  |  | $ 2,000,000,000.0 |
Borrowings on revolving credit facility |  |  | $ 0 | 0 |  |  |
Commercial paper | Revolving Credit Facility |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Line of credit facility, accordion feature, increase limit (up to) |  |  |  |  |  | 1,000,000,000.0 |
Commercial paper | Letter of Credit |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity with accordion feature |  |  |  |  |  | 300,000,000.0 |
Commercial paper | Bridge Loan |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity with accordion feature |  |  |  |  |  | $ 150,000,000.0 |
Senior Notes 3.11%, 2025 Maturity | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayment of debt |  | $ 50,000,000.0 |  |  |  |  |
Interest rate |  | 3.11% |  |  |  |  |
Debt term |  | 10 years |  |  |  |  |
Senior Notes, 3.45%, 2025 Maturity | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Repayment of debt | $ 400,000,000.0 |  |  |  |  |  |
Interest rate | 3.45% |  |  |  |  |  |
Debt term | 3 years |  |  |  |  |  |
Senior Notes, 4.20%, 2028 Maturity | Senior Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate |  |  | 4.20% |  |  |  | 4.20%
Aggregate principal amount |  |  | $ 400,000,000 | $ 400,000,000 |  |  | $ 400,000,000.0
Bridge Loan Merger | Bridge Loan | UniFirst Corporation |  |  |  |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |
Pre-paid fees |  |  | $ 5,200,000 |  |  |  |

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B + Details
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