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Pension and Other Postretirement Benefits - Schedule of Amounts in Other Comprehensive Loss that are Expected to be Recognized as Components of Net Periodic Benefit Cost (Details) $ in Millions | Jun. 30, 2024 USD ($)
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Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year |
Amortization of prior service cost (benefit) | $ 3.3
Amortization of net actuarial loss (gain) | 1.7
Amortization of accumulated other comprehensive loss (gain) | 5.0
Pension Benefits |
Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year |
Amortization of prior service cost (benefit) | 2.1
Amortization of net actuarial loss (gain) | 7.3
Amortization of accumulated other comprehensive loss (gain) | 9.4
Other Benefits |
Amounts in other comprehensive loss that are expected to recognized as components of net periodic benefit cost in the next fiscal year |
Amortization of prior service cost (benefit) | 1.2
Amortization of net actuarial loss (gain) | (5.6)
Amortization of accumulated other comprehensive loss (gain) | $ (4.4)

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- Definition Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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