Deferred Compensation Arrangement with Individual, Shares Outstanding

No definition available.

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- Definition

Restricted Stock Awards [Abstract]

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement, Stock Options [Abstract]

+ References

No definition available.

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- Definition

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding and Exercisable, Weighted Average Remaining Contractual Term

+ References

No definition available.

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

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

+ References

+ Details

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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.

+ References

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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.

+ References

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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.

+ References

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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 equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

+ Details

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

+ Details

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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).

+ References

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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).

+ References

+ Details

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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.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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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.

+ References

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- References

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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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.

+ References

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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.

+ References

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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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.

+ References

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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-Section 50
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-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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- References

No definition available.

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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

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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- References

No definition available.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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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

Expected term of 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

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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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Share-Based Payments (Details) - USD ($)	12 Months Ended
Share-Based Payments (Details) - USD ($)	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018	Jan. 31, 2018	Aug. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 38,200,000	$ 29,200,000	$ 32,300,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Forfeited (in shares)	(100,000)	0
Weighted Average Grant Date Fair Value Per Share [Roll Forward]
Forfeited, Weighted Average Grant Date Fair Value Per Share (in dollars per share)	$ 135.43	$ 159.88
Stock Options \| $40.01 - $100.00 (average life - 2.1 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: lower range limit (in dollars per share)	40.01
Range of option exercise prices: upper range limit (in dollars per share)	$ 100
Range of option exercise prices: average life	2 years 1 month 6 days
Stock Options \| $100.01 - $160.00 (average life - 8.3 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: lower range limit (in dollars per share)	$ 100.01
Range of option exercise prices: upper range limit (in dollars per share)	$ 160
Range of option exercise prices: average life	8 years 3 months 19 days
Stock Options \| $160.01 - $210.00 (average life - 5.2 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: lower range limit (in dollars per share)	$ 160.01
Range of option exercise prices: upper range limit (in dollars per share)	$ 210
Range of option exercise prices: average life	5 years 2 months 12 days
Stock Options \| $210.01 - $239.76 (average life - 6.1 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: lower range limit (in dollars per share)	$ 210.01
Range of option exercise prices: upper range limit (in dollars per share)	$ 239.76
Range of option exercise prices: average life	6 years 1 month 6 days
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)	700,000	1,400,000	1,600,000
Years of service eligible for continued vesting	60 years
Age to be attained allowing for continued vesting	10 years
Share-based payment expense	$ 38,200,000	$ 29,200,000	$ 32,300,000
Stock Incentive Plan \| $40.01 - $100.00 (average life - 2.1 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: Number of Shares, Outstanding	100,000
Range of option exercise prices: Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 62.25
Range of option exercise prices: Number of Shares, Exercisable	100,000
Range of option exercise prices: Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 62.25
Stock Incentive Plan \| $100.01 - $160.00 (average life - 8.3 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: Number of Shares, Outstanding	700,000
Range of option exercise prices: Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 123.01
Range of option exercise prices: Number of Shares, Exercisable	200,000
Range of option exercise prices: Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 126.16
Stock Incentive Plan \| $160.01 - $210.00 (average life - 5.2 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: Number of Shares, Outstanding	100,000
Range of option exercise prices: Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 207.80
Range of option exercise prices: Number of Shares, Exercisable	100,000
Range of option exercise prices: Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 207.80
Stock Incentive Plan \| $210.01 - $239.76 (average life - 6.1 years)
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Range of option exercise prices: Number of Shares, Outstanding	0
Range of option exercise prices: Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 239.76
Range of option exercise prices: Number of Shares, Exercisable	0
Range of option exercise prices: Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 239.76
Stock Incentive Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 24,600,000	$ 25,100,000	$ 27,900,000
Share-based Compensation Arrangement, Restricted Stock Awards [Abstract]
Share-based compensation vesting period (years)	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning of period, Outstanding (in shares)	400,000	400,000	400,000
Granted (in shares)	200,000	200,000	200,000
Vested (in shares)	(100,000)	(200,000)	(200,000)
End of period, Outstanding (in shares)	350,000	400,000	400,000
Weighted Average Grant Date Fair Value Per Share [Roll Forward]
Beginning of period, Outstanding, Weighted Average Grant date Fair Value Per Share (in dollars per share)	$ 156.32	$ 186.63	$ 197.41
Granted, Weighted Average Grant Date Fair Value Per Share (in dollars per share)	122.10	120.73	154.95
Vested, Weighted Average Grant Date Fair Value Per Share (in dollars per share)	171.92	184.60	177.79
End of period, Outstanding, Weighted Average Grant Date Fair Value Per Share (in dollars per share)	$ 134.68	$ 156.32	$ 186.63
Unrecognized compensation cost	$ 26,200,000
Unrecognized compensation cost period of recognition (years)	1 year 7 months 6 days
Total fair value of shares vested	$ 22,800,000	$ 26,900,000	$ 26,600,000
Stock Incentive Plan \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 4,900,000	$ 2,700,000	$ 3,100,000
Share-based Compensation Arrangement, Restricted Stock Awards [Abstract]
Share-based compensation vesting period (years)	3 years
Weighted Average Grant Date Fair Value Per Share [Roll Forward]
Unrecognized compensation cost	$ 15,200,000
Unrecognized compensation cost period of recognition (years)	1 year 10 months 24 days
Share-based Compensation Arrangement, Stock Options [Abstract]
Award expiration term	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning of period, Outstanding, Number of Shares	400,000	300,000	300,000
Granted, Number of Shares	500,000	100,000	0
Stock options exercised (in shares)	0	0	0
End of period, Outstanding, Number of Shares	915,000	400,000	300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning of period, Outstanding, Weighted average exercise price (in dollars per share)	$ 146.70	$ 154.69	$ 156.43
Granted, Weighted average exercise price (in dollars per share)	121.87	116.40	156.39
Exercised, Weighted average exercise price (in dollars per share)	116.36		115.27
End of period, Outstanding, Weighted average exercise price (in dollars per share)	$ 133.19	$ 146.70	$ 154.69
Exercisable, Number of shares outstanding (in shares)	400,000	300,000	200,000		200,000
Exercisable, Weighted average exercise price (in dollars per share)	$ 151.07	$ 147.51	$ 134.13		$ 106.54
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Total intrinsic value of stock options expected to vest			$ 500,000
Stock options exercised (in shares)	0	0	0
Total intrinsic value of stock options outstanding	$ 3,300,000
Total intrinsic value of stock options expected to vest	0
Total intrinsic value of stock options exercisable	3,300,000
Stock Incentive Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	7,300,000	$ 0	$ 0
Stock Incentive Plan \| Director share units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 1,400,000	$ 1,400,000	$ 1,300,000
Supplemental Deferred Savings Plan \| Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning of period, Outstanding (in shares)	0	0
End of period, Outstanding (in shares)	67,000	0	0
Weighted Average Grant Date Fair Value Per Share [Roll Forward]
Unrecognized compensation cost	$ 1,900,000
Unrecognized compensation cost period of recognition (years)	2 years 1 month 6 days
Supplemental Deferred Savings Plan \| Employee Deferred Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense	$ 0	$ 0	$ 0
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Deferred compensation, number of share units outstanding	7,500
Supplemental Deferred Savings Plan \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment expense		$ 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)	320,000	360,000	370,000
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Deferred compensation, number of share units outstanding	98,000
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)	1,000,000.0
Share-based Payment Arrangement, Option, Exercise Price Range, End of Period [Abstract]
Employee discount on purchases of common stock	5.00%
Service Options \| Stock Incentive Plan \| Stock Options
Share-based Compensation Arrangement, Restricted Stock Awards [Abstract]
Share-based compensation vesting period (years)	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield	0.40%	0.40%	0.30%
Expected volatility	33.70%	32.80%	30.90%
Risk-free interest rate	1.30%	3.00%	2.00%
Expected life of options	5 years	4 years	4 years
Weighted-average fair value of options (in dollars per share)	$ 34.22	$ 34.06	$ 41.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
End of period, Outstanding, Number of Shares	815,000
Market Options \| Stock Incentive Plan \| Stock Options
Share-based Compensation Arrangement, Restricted Stock Awards [Abstract]
Share-based compensation vesting period (years)	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)		0	0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Dividend yield	0.40%
Expected volatility	33.70%
Risk-free interest rate	1.50%
Expected life of options	7 years
Weighted-average fair value of options (in dollars per share)	$ 44.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
End of period, Outstanding, Number of Shares	100,000