XML 59 R53.htm IDEA: XBRL DOCUMENT
v3.25.1

Stockholders' Equity (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2025
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Summary of Activity in Common Stock and Treasury Stock Shares | Activity in common stock and treasury stock shares were as follows:
|  | Common Stock |  |  | Treasury Stock |  |  | Treasury stock held for deferred compensation |
Balances as of January 1, 2024 |  |  | 72,960 |  |  |  | (12,823 | ) |  |  | (54 | )
Sales of treasury stock |  |  | — |  |  |  | 479 |  |  |  | — |
Common shares issued for benefit plans |  |  | — |  |  |  | 159 |  |  |  | — |
Purchases of stock by deferred compensation |  |  | — |  |  |  | — |  |  |  | — |
Distribution of stock from deferred compensation |  |  | — |  |  |  | — |  |  |  | 1 |
Balances as of March 31, 2024 |  |  | 72,960 |  |  |  | (12,185 | ) |  |  | (53 | )
Balances as of January 1, 2025 |  |  | 72,960 |  |  |  | (13,607 | ) |  |  | (31 | )
Sales of treasury stock |  |  | — |  |  |  | 344 |  |  |  | — |
Purchase of treasury stock |  |  | — |  |  |  | (243 | ) |  |  | — |
Common shares issued for benefit plans |  |  | — |  |  |  | 126 |  |  |  | — |
Purchases of stock by deferred compensation |  |  | — |  |  |  | — |  |  |  | — |
Distribution of stock from deferred compensation |  |  | — |  |  |  | — |  |  |  | 1 |
Balances as of March 31, 2025 |  |  | 72,960 |  |  |  | (13,380 | ) |  |  | (30 | )
|  | Common Stock |  |  | Treasury Stock |  |  | Treasury stock held for deferred compensation |
Balances as of September 30, 2023 |  |  | 72,960 |  |  |  | (13,070 | ) |  |  | (55 | )
Sales of treasury stock |  |  | — |  |  |  | 726 |  |  |  | — |
Common shares issued for benefit plans |  |  | — |  |  |  | 159 |  |  |  | — |
Purchases of stock by deferred compensation |  |  | — |  |  |  | — |  |  |  | (1 | )
Distribution of stock from deferred compensation |  |  | — |  |  |  | — |  |  |  | 3 |
Balances as of March 31, 2024 |  |  | 72,960 |  |  |  | (12,185 | ) |  |  | (53 | )
Balances as of September 30, 2024 |  |  | 72,960 |  |  |  | (13,787 | ) |  |  | (45 | )
Sales of treasury stock |  |  | — |  |  |  | 725 |  |  |  | — |
Purchase of treasury stock |  |  | — |  |  |  | (449 | ) |  |  | — |
Common shares issued for benefit plans |  |  | — |  |  |  | 131 |  |  |  | — |
Purchases of stock by deferred compensation |  |  | — |  |  |  | — |  |  |  | (1 | )
Distribution of stock from deferred compensation |  |  | — |  |  |  | — |  |  |  | 16 |
Balances as of March 31, 2025 |  |  | 72,960 |  |  |  | (13,380 | ) |  |  | (30 | )
Summary of Activity for RSUs | A summary of the activity for RSUs:
|  | Three Months Ended March 31, 2025 |  |  | Six Months Ended March 31, 2025 |
|  | Number of units |  |  | Weighted-Average Grant Date Fair Value |  |  | Number of units |  |  | Weighted-Average Grant Date Fair Value |
Beginning balance |  |  | 303 |  |  | $ | 122.07 |  |  |  | 318 |  |  | $ | 118.19 |
Granted |  |  | 101 |  |  |  | 193.09 |  |  |  | 113 |  |  |  | 191.08 |
Released |  |  | (51 | ) |  |  | 137.63 |  |  |  | (77 | ) |  |  | 125.32 |
Forfeited |  |  | (3 | ) |  |  | 144.37 |  |  |  | (4 | ) |  |  | 126.88 |
Ending balance |  |  | 350 |  |  | $ | 140.11 |  |  |  | 350 |  |  | $ | 140.11 |
Stock Options [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Summary of Activity for Stock Option Awards | The following is a summary of the activity for stock option awards:
|  | Three Months Ended March 31, 2025 |  |  | Six Months Ended March 31, 2025 |
|  | Number of options |  |  | Weighted-Average Exercise Price per Share |  |  | Number of options |  |  | Weighted-Average Exercise Price per Share |
Beginning balance |  |  | 3,220 |  |  | $ | 86.54 |  |  |  | 3,578 |  |  | $ | 86.03 |
Granted |  |  | 38 |  |  |  | 193.09 |  |  |  | 41 |  |  |  | 191.45 |
Exercised |  |  | (298 | ) |  |  | 73.59 |  |  |  | (659 | ) |  |  | 78.24 |
Forfeited |  |  | (4 | ) |  |  | 108.31 |  |  |  | (4 | ) |  |  | 108.31 |
Ending balance |  |  | 2,956 |  |  | $ | 89.20 |  |  |  | 2,956 |  |  | $ | 89.20 |
Changes in Non-vested Stock Options | Changes in non-vested stock options were as follows:
|  | Three Months Ended March 31, 2025 |  |  | Six Months Ended March 31, 2025 |
|  | Number of options |  |  | Weighted-Average Grant Date Fair Value per Share |  |  | Number of options |  |  | Weighted-Average Grant Date Fair Value Per Share |
Beginning balance |  |  | 495 |  |  | $ | 40.62 |  |  |  | 898 |  |  | $ | 37.30 |
Granted |  |  | 38 |  |  |  | 84.13 |  |  |  | 41 |  |  |  | 83.65 |
Vested |  |  | (28 | ) |  |  | 50.20 |  |  |  | (434 | ) |  |  | 34.62 |
Forfeited |  |  | (4 | ) |  |  | 44.31 |  |  |  | (4 | ) |  |  | 44.31 |
Ending balance |  |  | 501 |  |  | $ | 43.35 |  |  |  | 501 |  |  | $ | 43.35 |
Stock Options Vested, or Expected to Vest and Exercisable | Information about stock options that have vested, or are expected to vest, and are exercisable at March 31, 2025 was as follows:
|  | Number of options |  |  | Weighted-Average Exercise Price |  |  | Weighted-Average Remaining Life in Years |  |  | Aggregate Intrinsic Value |
Options outstanding |  |  | 2,956 |  |  | $ | 89.20 |  |  |  | 5.1 |  |  | $ | 276,144 |
Options vested and exercisable |  |  | 2,455 |  |  |  | 85.34 |  |  |  | 4.6 |  |  |  | 238,491 |
Options vested and expected to vest |  |  | 2,938 |  |  |  | 88.96 |  |  |  | 5.1 |  |  |  | 275,121 |
Performance Restricted Stock Units [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Schedule of Assumptions to Value PSUs Granted | The fair value of the PSUs at the grant date was determined based upon a Monte Carlo valuation method. The assumptions used in the Monte Carlo method to value the PSUs granted, which includes the grant date fair value outcome from the Monte Carlo method, were as follows:
|  | March 31, 2025 |  |  | March 31, 2024 |
Expected volatility |  |  | 30.9 | % |  |  | 30.2 | %
Risk free interest rate |  |  | 4.1 | % |  |  | 4.5 | %
Expected life |  | 3 years |  |  | 3 years |
Grant date fair value |  | $ | 196.63 |  |  | $ | 146.47 |
Summary of Activity for PSUs | A summary of the activity for PSUs:
|  | Three Months Ended March 31, 2025 |  |  | Six Months Ended March 31, 2025 |
|  | Number of units |  |  | Weighted-Average Grant Date Fair Value |  |  | Number of units |  |  | Weighted-Average Grant Date Fair Value |
Beginning balance |  |  | 106 |  |  | $ | 167.31 |  |  |  | 62 |  |  | $ | 146.47 |
Granted |  |  | — |  |  |  | — |  |  |  | 44 |  |  |  | 196.63 |
Forfeited |  |  | (1 | ) |  |  | 173.87 |  |  |  | (1 | ) |  |  | 171.60 |
Ending balance |  |  | 105 |  |  | $ | 167.25 |  |  |  | 105 |  |  | $ | 167.25 |

X
- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-4 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-5 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481142/505-10-45-2 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-10 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480244/480-10-S99-1 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
Name: | us-gaap_ScheduleOfStockOptionsRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 1D -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-1D Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480483/718-10-35-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(v) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAndExercisableTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (c) -Paragraph 2 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationPerformanceSharesAwardUnvestedActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of share-based payment award, valuation assumptions. + References No definition available. + Details
Name: | wwd_ScheduleOfShareBasedPaymentAwardValuationAssumptionsTableTextBlock
Namespace Prefix: | wwd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=wwd_PerformanceRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |