Fair Value Measurements (Details)	3 Months Ended
Feb. 28, 2023 USD ($) investment	Aug. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 339,000,000	$ 223,200,000
Number of strategic investments whose underlying Company was acquired by a third party \| investment	1
Short-term borrowings outstanding	$ 0	18,000,000.0
Line of Credit \| Credit facility \| The Credit Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term borrowings outstanding	0	18,000,000
Approximate fair value of short term borrowings	0	18,000,000
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	9,500,000	11,900,000
Estimate of Fair Value Measurement \| Unsecured debt \| 2.150% Senior Unsecured Notes Due December 2030
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying and estimated fair values of financial instruments	$ 390,600,000	$ 399,200,000

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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No definition available.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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