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Employee Benefit Plans | 6 Months Ended
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Mar. 31, 2026
Compensation Related Costs [Abstract] |
Compensation Related Costs, General | EMPLOYEE BENEFIT PLANS Stock-Based Compensation The Company’s Stock Incentive Plan provides for the granting of equity awards, such as performance stock units (PSUs) and restricted stock units (RSUs), to executive officers, other key employees and non-management directors. PSUs are earned by achieving key performance goals, and RSUs are earned through continued employment with the Company over a requisite time period. Each stock unit represents the contingent right to receive one share of the Company’s common stock if the performance criteria and/or vesting conditions are satisfied. The stock units have no dividend or voting rights until vested. In October 2025, the Company granted 374,025 PSUs to its executive officers and other key employees. The number of units that ultimately vest depends on the Company’s relative position compared to its peers in achieving each of the performance criteria and can range from 0% to 300% of the number of units granted. These awards vest at the end of a three-year performance period ending September 30, 2028. The grant date fair value of these equity awards was $157.79 per unit. Compensation expense related to this grant was $5.1 million and $8.9 million in the three and six months ended March 31, 2026, respectively, based on an estimate of the Company’s performance against a market index or its peer group, the elapsed portion of the performance period and the grant date fair value of the award. During the six months ended March 31, 2026, the Company granted approximately 670,000 RSUs to approximately 1,600 recipients, including executive officers, other key employees and non-management directors. The weighted average grant date fair value of these equity awards was $143.05 per unit, and they vest annually in equal installments over periods of three to five years. Compensation expense related to these grants was $5.0 million and $16.8 million in the three and six months ended March 31, 2026, respectively. Compensation expense in the six month period included $8.1 million of expense recognized for employees that were retirement eligible on the date of grant. Total stock-based compensation expense related to the Company’s equity awards was $31.9 million and $69.5 million during the three and six months ended March 31, 2026, respectively, compared to $29.8 million and $69.8 million during the three and six months ended March 31, 2025.

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- Definition The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482969/710-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 710 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/710/tableOfContent + Details
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