Recent Accounting Changes and Accounting Pronouncements Change in accounting Policy - retrospective restatement (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Oct. 01, 2016	Oct. 01, 2016	Sep. 26, 2015
Statement of Cash Flows [Abstract]
Excess Tax Benefit from Share-based Compensation, Operating Activities			$ 10.5
Excess Tax Benefit from Share-based Compensation, Financing Activities			$ 10.5
Effective Income Tax Rate Reconciliation, Excess Tax Benefit, Share-based Compensation, Amount	$ 2.9	$ 9.7

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11374-113907

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Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Effective Income Tax Rate Reconciliation, Excess Tax Benefits, Share-based Compensation, Amount

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