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Summary of Significant Accounting Policies (Details 3) - shares shares in Millions	3 Months Ended		6 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Summary of basic and diluted shares
Basic shares	81.3	81.7	81.6	81.6
Dilutive effect of stock options and RSUs	1.0	0.6	1.2	0.8
Diluted shares	82.3	82.3	82.8	82.4
Summary of Significant Accounting Policies (Textual) [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1.5	2.3

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Summary of significant accounting policies.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Publisher FASB
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-Topic 260
-SubTopic 10
-Section 50
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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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