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Debt - Settlement of debt (Details) - USD ($) $ in Millions | 3 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Debt Instrument [Line Items] |  |
Cash Paid | $ 1,000.0 | $ 0.0
Loss on settlement of debt | (0.3) | $ (26.8)
3.922% 2021 Notes | Senior Indebtedness |  |
Debt Instrument [Line Items] |  |
Principal Amount Settled | 1,000.0 |
Cash Paid | 1,000.0 |
Total consideration, extinguishment of debt | 1,000.0 |
Loss on settlement of debt | $ 0.3 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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