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Debt (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Apr. 01, 2017
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 590.4 | $ 588.2
Current portion of long-term debt | 298.6 | 0.0
Long-term debt | 291.8 | 588.2
2.125% Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior Notes | 298.6 | 298.1
Interest Rate Fair Value Hedge Derivative at Fair Value, Net | 0.9 | 1.2
Unamortized Debt Issuance Expense | 0.5 | 0.7
2.625% Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Senior Notes | 291.8 | 290.1
Interest Rate Fair Value Hedge Derivative at Fair Value, Net | 6.7 | 8.2
Unamortized Debt Issuance Expense | $ 1.5 | $ 1.7

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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