Deferred Compensation Arrangement with Individual, Shares Outstanding

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Age Threshold for Continued Vesting

+ References

No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Name Accounting Standards Codification
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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Discount rate from fair value on purchase date that participants pay for shares.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Share-based Payments - Narrative (Details) - USD ($)	12 Months Ended
Share-based Payments - Narrative (Details) - USD ($)	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Jan. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 32,500,000	$ 38,200,000	$ 29,200,000
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)					2,700,000
Number of shares available for grant (in shares)	300,000	700,000	1,400,000
Age to be attained allowing for continued vesting		60 years
Years of service eligible for continued vesting	5 years	10 years
Share-based payment expense	$ 32,500,000	$ 38,200,000	$ 29,200,000
Stock Incentive Plan \| Restricted stock awards and units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding of restricted stock (in shares)	400,000	400,000	400,000	400,000
Share-based compensation vesting period (years)	4 years
Unrecognized compensation cost	$ 28,100,000
Unrecognized compensation cost period of recognition (years)	1 year 9 months 18 days
Fair value of shares vested	$ 19,500,000	$ 22,800,000	$ 26,900,000
Granted (in shares)	200,000	200,000	200,000
Share-based payment expense	$ 15,100,000	$ 24,600,000	$ 25,100,000
Stock Incentive Plan \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 17,000,000
Unrecognized compensation cost period of recognition (years)	2 years 2 months 12 days
Stock options outstanding (in shares)	1,200,000	900,000	400,000	300,000
Award expiration term	10 years
Intrinsic value of options exercised	$ 1,200,000		$ 0
Total intrinsic value of stock options outstanding	70,900,000
Total intrinsic value of stock options expected to vest	42,800,000
Total intrinsic value of stock options exercisable	27,400,000
Share-based payment expense	$ 9,200,000	$ 4,900,000	$ 2,700,000
Stock Incentive Plan \| Stock options \| Service Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period (years)	3 years
Stock options outstanding (in shares)	800,000
Granted (in shares)	0
Stock Incentive Plan \| Stock options \| Market Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation vesting period (years)	4 years
Stock options outstanding (in shares)	400,000
Granted (in shares)			0
Stock Incentive Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 6,800,000	7,300,000	$ 0
Supplemental Deferred Savings Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding of restricted stock (in shares)	100,000
Share-based compensation vesting period (years)	3 years
Unrecognized compensation cost	$ 3,800,000
Unrecognized compensation cost period of recognition (years)	1 year 6 months
Supplemental Deferred Savings Plan \| Employee Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested (in shares)	7,000
Share-based payment expense	$ 0	$ 0	$ 0
Directors' Deferred Compensation Plan \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant (in shares)	300,000	300,000	400,000
Shares vested (in shares)	100,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	1,500,000
Number of shares available for grant (in shares)	1,000,000
Employee discount on purchases of common stock	5.00%