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v3.24.2

Employee Benefit Plans (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) grant_recipient $ / shares shares | Jun. 30, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Payment Arrangement, Noncash Expense |  |  | $ 92.7 | $ 80.6
Performance Shares [Member] | October Two Thousand Twenty Three Grant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
RSUs granted in the period | shares |  |  | 277,779 |
Award vesting period |  |  | 3 years |
Share-based Payment Arrangement, Noncash Expense | $ 3.4 |  | $ 10.2 |
Fair value of equity awards on the date of grant (in US$ per unit) | $ / shares |  |  | $ 146.72 |
Performance Shares [Member] | October Two Thousand Twenty Three Grant | Minimum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of total units granted that vest in the period |  |  | 0.00% |
Performance Shares [Member] | October Two Thousand Twenty Three Grant | Maximum [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Percentage of total units granted that vest in the period |  |  | 200.00% |
Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Payment Arrangement, Noncash Expense | 25.0 | $ 26.3 | $ 84.4 | $ 73.4
Time-Based RSU | Two Thousand Twenty Four time based RSU grants FYTD |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
RSUs granted in the period | shares |  |  | 660,000 |
Share-based Payment Arrangement, Noncash Expense | $ 4.7 |  | $ 22.0 |
Fair value of equity awards on the date of grant (in US$ per unit) | $ / shares |  |  | $ 147.58 |
RSU Grant Recipients | grant_recipient |  |  | 1,460 |
Time-Based RSU | Two Thousand Twenty Four time based RSU grants FYTD | Retirement Eligible |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Payment Arrangement, Noncash Expense |  |  | $ 16.4 |

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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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -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 + Details
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