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Accumulated Other Comprehensive Loss, Net | 12 Months Ended
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Sep. 30, 2022
Equity [Abstract] |
Accumulated Other Comprehensive Loss, Net | Accumulated Other Comprehensive Loss, Net Comprehensive income consists of net income and other gains and losses affecting stockholders’ equity that, under U.S. GAAP, are excluded from net income. Other comprehensive loss and income includes losses on cash flow hedges, net actuarial gains and losses from defined benefit pension plans, and gains and losses on foreign currency translations. The following table summarizes the changes in accumulated other comprehensive loss for the years ended September 30, 2022, 2021, and 2020.
(in millions) |  | Foreign Currency Translation Adjustment |  | Pension Benefits Adjustment |  |  |  | Cash Flow Hedge |  | Accumulated Other Comprehensive Loss, net
Balances as of September 30, 2019 |  | $ | (31.5) |  |  | $ | (3.3) |  |  |  |  | $ | — |  |  | $ | (34.8) |
ASU 2018-02 cumulative transition adjustment |  | — |  |  | (0.7) |  |  |  |  | — |  |  | (0.7) |
Adjusted balances as of September 30, 2019 |  | (31.5) |  |  | (4.0) |  |  |  |  | — |  |  | (35.5) |
Other comprehensive loss |  | (4.5) |  |  | (0.2) |  |  |  |  | — |  |  | (4.7) |
Amounts reclassified from AOCI, net of tax |  | — |  |  | 0.1 |  |  |  |  | — |  |  | 0.1 |
Other comprehensive loss, net of tax |  | (4.5) |  |  | (0.1) |  |  |  |  | — |  |  | (4.6) |
Balances as of September 30, 2020 |  | $ | (36.0) |  |  | $ | (4.1) |  |  |  |  | $ | — |  |  | $ | (40.1) |
Other comprehensive income |  | 13.3 |  |  | 1.5 |  |  |  |  | — |  |  | 14.8 |
Amounts reclassified from AOCI, net of tax |  | — |  |  | 0.2 |  |  |  |  | — |  |  | 0.2 |
Other comprehensive income, net of tax |  | 13.3 |  |  | 1.7 |  |  |  |  | — |  |  | 15.0 |
Balances as of September 30, 2021 |  | $ | (22.7) |  |  | $ | (2.4) |  |  |  |  | $ | — |  |  | $ | (25.1) |
Other comprehensive loss |  | (11.7) |  |  | (0.3) |  |  |  |  | (53.5) |  |  | (65.5) |
Other comprehensive loss, net of tax |  | (11.7) |  |  | (0.3) |  |  |  |  | (53.5) |  |  | (65.5) |
Balances as of September 30, 2022 |  | $ | (34.4) |  |  | $ | (2.7) |  |  |  |  | $ | (53.5) |  |  | $ | (90.6) |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI https://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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