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Share-Based Payments (Details) - USD ($) $ / shares in Units, shares in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2022
Other disclosures |  |  |
Unrecognized compensation expense | $ 71,700,000 | $ 45,900,000 |
Recognition period of unrecognized compensation expense | 3 years |  | 3 years
PEP Units |  |  |
Share-based Payments |  |  |
Vesting period | 3 years |  |
Units |  |  |
Outstanding at September 30 (in units) | 0.7 | 1.2 | 1.2
Granted (in units) | 0.2 | 0.3 |
PEP units earned (in units) | 0.2 | 0.6 |
Vested (in shares) | (0.4) | (1.3) |
Outstanding at December 31 (in units) | 0.7 | 0.8 | 0.7
Weighted Average Grant-Date Fair Value |  |  |
Outstanding at September 30 (in USD per unit) | $ 60.60 | $ 37.22 | $ 37.22
Granted (in USD per unit) | 94.65 | 85.48 |
PEP units earned (in USD per unit) | 43.19 | 27.90 |
Vested (in USD per unit) | 43.19 | 27.89 |
Outstanding at December 31 (in USD per unit) | $ 75.73 | $ 60.15 | $ 60.60
Restricted Stock Units (RSUs) |  |  |
Units |  |  |
Outstanding at September 30 (in units) | 1.0 | 1.3 | 1.3
Granted (in units) | 0.3 | 0.3 |
Vested (in shares) | (0.4) | (0.5) |
Outstanding at December 31 (in units) | 0.9 | 1.1 | 1.0
Weighted Average Grant-Date Fair Value |  |  |
Outstanding at September 30 (in USD per unit) | $ 53.05 | $ 38.88 | $ 38.88
Granted (in USD per unit) | 83.60 | 74.70 |
Vested (in USD per unit) | 43.44 | 27.63 |
Outstanding at December 31 (in USD per unit) | $ 65.61 | $ 52.52 | $ 53.05
Other disclosures |  |  |
Compensation expense related to share-based payments | $ 11.9 | $ 9.8 |

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- Definition The weighted average fair value at grant date for non-vested equity-based awards earned 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 No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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