Employee Benefit Plans (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Noncash Expense	$ 22.9	$ 23.7
Performance Shares [Member] \| October Two Thousand Twenty Two Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted in the period	600,000
Award vesting period	3 years
Share-based Payment Arrangement, Noncash Expense	$ 4.5
Fair value of equity awards on the date of grant (in US$ per unit)	$ 79.97
Performance Shares [Member] \| October Two Thousand Twenty Two 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 Two 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	$ 21.1	$ 21.9

Amount of noncash expense for share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
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-Publisher FASB
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+ References

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Percentage of vesting of award under share-based payment arrangement.

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