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Credit Facility - Narrative (Details) | Sep. 05, 2018 | Sep. 01, 2017 USD ($) | Jul. 31, 2021 | Oct. 31, 2019 | Sep. 01, 2018 USD ($) | Aug. 31, 2017 USD ($)
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Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit facility, term |  | 5 years |  |  |  |
Weighted average interest rate |  |  |  | 4.05% |  |
Deferred financing costs |  | $ 18,700,000 |  |  |  |
Credit Facility | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Fixed charge coverage ratio |  |  |  | 1.50 |  |
Credit Facility | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Leverage ratio |  |  |  | 4.00 |  |
Leverage ratio election option for four fiscal quarters in the event of material acquisition |  |  |  | 3.75 |  |
Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Deferred financing costs |  | 5,200,000 |  |  |  |
Term Loan | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount |  | 800,000,000.0 |  |  |  |
Deferred financing costs |  | $ 13,400,000 |  |  |  |
Revolving Credit Facility | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percentage of commitment fee on the unused portion of the Facility |  | 0.20% |  |  |  |
Revolving Credit Facility | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Percentage of commitment fee on the unused portion of the Facility |  | 0.35% |  |  |  |
Revolving Credit Facility | Line of Credit | Prior Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, borrowing capacity |  |  |  |  |  | $ 800,000,000.0
Revolving Credit Facility | Line of Credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, borrowing capacity |  | $ 900,000,000.0 |  |  |  |
Borrowing capacity after initial year of term |  |  |  |  | $ 800,000,000.0 |
Standby letters of credit | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, borrowing capacity |  | 300,000,000.0 |  |  |  |
Swing Line Loan | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of credit, borrowing capacity |  | $ 75,000,000.0 |  |  |  |
Eurodollar | Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Variable interest rate | 0.25% |  |  |  |  |
Eurodollar | Credit Facility | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Variable interest rate |  | 1.00% |  |  |  |
Eurodollar | Credit Facility | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Variable interest rate |  | 2.25% |  |  |  |
Base Rate | Credit Facility | Minimum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Variable interest rate |  | 0.00% |  |  |  |
Base Rate | Credit Facility | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Variable interest rate |  | 1.25% |  |  |  |
Forecast | Credit Facility | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Leverage ratio |  |  | 3.50 |  |  |

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