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Financial Instruments (Details 4) - USD ($) $ in Millions	Sep. 29, 2018	Mar. 31, 2018
2.125% Senior Notes [Member]
Schedule of Fair Value Hedging Adjustments [Line Items]
Senior Notes, Carrying Value	$ 0.0	$ 298.1
Cumulative amount of fair value hedging adjustment included in carrying value of hedged item		(1.6)
2.625% Senior Notes [Member]
Schedule of Fair Value Hedging Adjustments [Line Items]
Senior Notes, Carrying Value	288.5	288.0
Cumulative amount of fair value hedging adjustment included in carrying value of hedged item	$ (10.6)	$ (10.8)

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[Line Items] for Schedule of Fair Value Hedging Adjustments [Table]

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Fair value of all derivatives designated as interest rate fair value hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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