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Reclassifications out of Accumulated Other Comprehensive Loss | 12 Months Ended
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Sep. 30, 2023
Reclassifications out of Accumulated Other Comprehensive Loss |
Reclassifications out of Accumulated Other Comprehensive Loss | 17. Reclassifications out of Accumulated Other Comprehensive Loss The accumulated balances and reporting period activities for the years ended September 30, 2023, 2022 and 2021 related to reclassifications out of accumulated other comprehensive loss are summarized as follows (in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Foreign |  | ​ | ​ |  | Accumulated
​ | ​ | Pension | ​ | Currency | ​ | Loss on | ​ | Other
​ | ​ | Related | ​ | Translation | ​ | Derivative | ​ | Comprehensive
​ | ​ | Adjustments | ​ | Adjustments | ​ | Instruments | ​ | Loss
Balances at September 30, 2020 | ​ | $ | (342.8) | ​ | $ | (567.3) | ​ | $ | (8.6) | ​ | $ | (918.7)
Other comprehensive income (loss) before reclassification | ​ |  | 14.6 | ​ | ​ | (12.8) | ​ | ​ | 0.8 | ​ | ​ | 2.6
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 12.0 | ​ |  | — | ​ |  | 3.7 | ​ |  | 15.7
Balances at September 30, 2021 | ​ | $ | (316.2) | ​ | $ | (580.1) | ​ | $ | (4.1) | ​ | $ | (900.4)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Foreign | ​ | ​ | ​ | Accumulated
​ | ​ | Pension | ​ | Currency | ​ | Loss on | ​ | Other
​ | ​ | Related | ​ | Translation | ​ | Derivative | ​ | Comprehensive
​ |  | Adjustments |  | Adjustments |  | Instruments |  | Loss
Balances at September 30, 2021 | ​ | $ | (316.2) | ​ | $ | (580.1) | ​ | $ | (4.1) | ​ | $ | (900.4)
Other comprehensive income (loss) before reclassification | ​ | ​ | 89.9 | ​ | ​ | (238.7) | ​ | ​ | 37.9 | ​ | ​ | (110.9)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 9.0 | ​ |  | 19.5 | ​ |  | 3.1 | ​ |  | 31.6
Balances at September 30, 2022 | ​ | $ | (217.3) | ​ | $ | (799.3) | ​ | $ | 36.9 | ​ | $ | (979.7)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Foreign | ​ | ​ | ​ | Accumulated
​ | ​ | Pension | ​ | Currency | ​ | Loss on | ​ | Other
​ | ​ | Related | ​ | Translation | ​ | Derivative | ​ | Comprehensive
​ |  | Adjustments |  | Adjustments |  | Instruments |  | Loss
Balances at September 30, 2022 | ​ | $ | (217.3) | ​ | $ | (799.3) | ​ | $ | 36.9 | ​ | $ | (979.7)
Other comprehensive (loss) income before reclassification | ​ | ​ | (10.9) | ​ | ​ | 59.6 | ​ | ​ | 10.7 | ​ | ​ | 59.4
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 2.2 | ​ |  | — | ​ |  | (8.5) | ​ |  | (6.3)
Balances at September 30, 2023 | ​ | $ | (226.0) | ​ | $ | (739.7) | ​ | $ | 39.1 | ​ | $ | (926.6)
​

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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