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Debt (Gain (Loss) on Extinguishment of Debt) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Extinguishment of Debt [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt | $ (0.5) | $ 0.0 | $ (6.4) | $ 21.2
Senior Notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt | 0.0 | 0.0 | (4.9) | 21.2
Exchange Notes |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt |  |  | 4.9 |
Term Loan A and Term Loan B Facility |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |
Gain (loss) on extinguishment of debt | $ (0.5) | $ 0.0 | $ (1.5) | $ 0.0

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-4 + Details
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