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Fair Value Measurements - Schedule of Fair Value Measurement of Long-term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2018	Mar. 31, 2018
4.000% Senior Notes | Carrying Value Prior to Impairment
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	$ 444.7	$ 444.5
4.000% Senior Notes | Level 2 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	437.4	448.1
Term Loan | Carrying Value Prior to Impairment
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	108.6	229.0
Term Loan | Level 2 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	109.7	231.2
Revolving Credit Facilities | Carrying Value Prior to Impairment
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	266.9	200.0
Revolving Credit Facilities | Level 2 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value disclosure	$ 266.9	$ 200.0

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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.

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No definition available.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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